Loading...
HomeMy WebLinkAbout9/22/2015 - RegularRoanoke County Board of Supervisors September 22, 2015 INVOCATION: Senior Pastor Jay Richards New Testament Baptist Church PLEDGE OF ALLEGIANCE TO THE UNITED STATES FLAG Disclaimer: "Any invocation that may be offered before the official start of the Board meeting shall be the voluntary offering of a private citizen, to and for the benefit of the Board. The views or beliefs expressed by the invocation speaker have not been previously reviewed or approved by the Board and do not necessarily represent the religious beliefs or views of the Board in part or as a whole. No member of the community is required to attend or participate in the invocation and such decision will have no impact on their right to actively participate in the business of the Board." Page 1 of 6 Roanoke County Board of Supervisors Agenda September 22, 2015 Good afternoon and welcome to our meeting for September 22, 2015. Regular meetings are held on the second and fourth Tuesday at 3:00 p.m. Public hearings are held at 7:00 p.m. on the fourth Tuesday of each month. Deviations from this schedule will be announced. The meetings are broadcast live on RVTV, Channel 3, and will be rebroadcast on Friday at 7:00 p.m. and on Sunday at 4:00 p.m. Board of Supervisors meetings can also be viewed online through Roanoke County's website at www.RoanokeCountyVA.gov. Our meetings are closed -captioned, so it is important for everyone to speak directly into the microphones at the podium. Individuals who require assistance or special arrangements to participate in or attend Board of Supervisors meetings should contact the Clerk to the Board at (540) 772-2005 at least 48 hours in advance. Please turn all cell phones off or place on silent. A. OPENING CEREMONIES (3:00 p.m.) 1. Roll Call B. REQUESTS TO POSTPONE, ADD TO OR CHANGE THE ORDER OF AGENDA ITEMS C. PROCLAMATIONS, RESOLUTIONS, RECOGNITIONS AND AWARDS 1. Proclamation declaring the month of October 2015 as Fire Prevention Month in the County of Roanoke (Stephen G. Simon, Chief of Fire and Rescue) D. NEW BUSINESS Resolution of the Board of Supervisors of the County of Roanoke, Virginia requesting the Governor of Virginia to require the Virginia Department of Environmental Quality (DEQ) to provide the appropriate plan review and construction oversight of the Mountain Valley Pipeline Project to protect surface and groundwater resources (Richard L. Caywood, Assistant County Administrator) Page 2 of 6 E F G PUBLIC HEARING AND ADOPTION OF RESOLUTION Resolution approving and adopting amendments to the Community Comprehensive Plan for Roanoke County, Virginia identifying Designated Growth Areas (David Holladay, Planning Administrator) 2. Resolution requesting the Virginia Department of Transportation to restrict through trucks on Route 758 (Carson Road), Vinton Magisterial District (David Holladay, Planning Administrator) FIRST READING OF ORDINANCES 1. Ordinance authorizing the lease of space in the Vinton Library to Nature's Cool Coffee d/b/a/ Land of a Thousand Hills Coffee Company for the operation of a coffee shop (Richard L. Caywood, Assistant County Administrator) 2. Ordinance authorizing the purchase of approximately five point two five (5.25) acres of real estate (Tax Map No. 080.00-05-19.00-0000) located at the corner of Rutrough Road and Chestnut Ridge Road from Timothy and Sean Martin for public use as a recreational amenity in the Vinton Magisterial District for $159,900 and reallocate funds from the Parks, Recreation and Tourism Reserve Account for such purpose (Doug Blount, Director of Parks, Recreation and Tourism) SECOND READING OF ORDINANCES 1. Ordinance amending Article II. — Regulation of Open Burning of Chapter 9 — Fire Prevention and Protection of the Roanoke County Code (Stephen G. Simon, Chief of Fire and Rescue) PUBLIC HEARING AND SECOND READING OF ORDINANCES Ordinance authorizing the granting of an electric utility easement to Appalachian Power (AEP) on property owned by the Roanoke County Board of Supervisors (Tax Map No. 055.00-01-08.00-0000) for the purpose of an underground electric power line to Green Hill Park Ball Field at 3050 Green Hill Park Road, Catawba Magisterial District (Paul M. Mahoney, County Attorney) 2. Ordinance amending Chapter 23 "Stormwater Management" of the Roanoke County Code (Tarek Moneir, Deputy Director of Development) 3. Ordinance amending Chapter 8.1, Erosion and Sediment Control (ESC) of the Roanoke County Code (Tarek Moneir, Deputy Director of Development) Page 3 of 6 ADOPTION OF RESOLUTION 1. Resolution adopting revisions to the Stormwater Management Design Manual for Roanoke County to be effective October 5, 2015 (Richard L. Caywood, Assistant County Administrator; Tarek Moneir, Deputy Director of Development) J. APPOINTMENTS 1. Capital Improvement Program (CIP) Review Committee (appointed by District) 2. Clean Valley Counsel (At Large) 3. Economic Development Authority (EDA) (appointed by District) 4. Parks, Recreation and Tourism Advisory Commission (appointed by District) K. CONSENT AGENDA ALL MATTERS LISTED UNDER THE CONSENT AGENDA ARE CONSIDERED BY THE BOARD TO BE ROUTINE AND WILL BE ENACTED BY ONE RESOLUTION IN THE FORM OR FORMS LISTED BELOW. IF DISCUSSION IS DESIRED, THAT ITEM WILL BE REMOVED FROM THE CONSENT AGENDA AND WILL BE CONSIDERED SEPARATELY Approval of minutes — August 25, 2015 2. Resolution expressing the appreciation of the Board of Supervisors of Roanoke County to Adele Birkhead, Police Officer — Uniform Division upon her retirement after more than eleven (11) years of service 3. Resolution expressing the appreciation of the Board of supervisors of Roanoke County to Charlton D. Wilson, Parks, Maintenance Foreman, upon his retirement after more than forty (40) years of service 4. Request to accept and allocate funds in the amount of $13,399 from the Bureau of Justice Assistance to the Roanoke County Police Department for the fiscal year 2015 Edward Byrne Memorial Justice Assistance Grant (JAG) Program Local Solicitation 5. Resolution supporting House Bill 2 project applications by Roanoke County and the Roanoke Valley Transportation Planning Organization L. CITIZENS' COMMENTS AND COMMUNICATIONS Page 4 of 6 M. REPORTS 1. General Fund Unappropriated Balance 2. Capital Reserves 3. Reserve for Board Contingency 4. Outstanding Debt 5. Treasurer's Statement of Accountability per Investment and Portfolio Policy as of August 31, 2015 6. Comparative Statement of Budgeted and Actual Revenues as of August 31, 2015 7. Comparative Statement of Budgeted and Actual Expenditures and Encumbrances as of August 31, 2015 8. Accounts Paid — August 31, 2015 N. WORK SESSIONS 1. Work session to discuss the impact of mental illness on law enforcement and a Department of Justice "Smart Policing" Grant that has been awarded to the Police Department (Howard B. Hall, Chief of Police) EVENING SESSION O. PROCLAMATIONS, RESOLUTIONS, RECOGNITIONS AND AWARDS 1. Proclamation commemorating the 150th anniversary of the Big Hill Baptist Church (Joseph B. "Butch" Church, Supervisor) 2. Resolution recognizing Hollins Fire and Rescue Department #5 for sixty-five (65) years of service (Stephen G. Simon, Chief of Fire and Rescue) P. NEW BUSINESS 1. Resolution appointing the County Attorney and approval of an employment Agreement (P. Jason Peters, Chairman, Roanoke County Board of Supervisors) Page 5 of 6 Q. PUBLIC HEARING AND SECOND READING OF ORDINANCES 1. Ordinance amending Chapter 5 "Animals and Fowl" of the Roanoke County Code to amend standards for residential chicken keeping (Philip Thompson, Deputy Director of Planning) 2. Ordinance amending Article II (Definitions and Use types), Article III (District Regulations and Article IV (Use and Design Standards) of the Roanoke County Zoning Ordinance (Philip Thompson, Deputy Director of Planning) R. CITIZEN COMMENTS AND COMUNICATIONS S. REPORTS AND INQUIRIES OF BOARD MEMBERS 1. Al Bedrosian 2. Joseph B. "Butch" Church 3. Joseph P. McNamara 4. Charlotte A. Moore 5. P. Jason Peters T. ADJOURNMENT Page 6 of 6 ACTION NO. ITEM NO. C-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Proclamation declaring the month of October as Fire Prevention Month in Roanoke County SUBMITTED BY: Stephen G. Simon Chief of Fire and Rescue APPROVED BY: Thomas Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The Roanoke County Fire and Rescue Department is requesting that the Board adopt the attached proclamation declaring the month of October 2015 as Fire Prevention Month. During the month of October 2015, the Fire Marshal's Office will bring important safety messages to citizens and visitors across the County at dozens of planned safety events using this year's theme, "Hear the Beep Where You Sleep. Every Bedroom Needs a Working Smoke Alarm!" Those planning to be in attendance to accept the proclamation will be Chief Stephen G. Simon along with Fire Marshal Brian Simmons. Other Fire and Rescue personnel will be in attendance as well. Page 1 of 1 CA ff rall 2 oa= 1838 DECLARING OCTOBER 2015 AS FIRE PREVENTION MONTH IN THE COUNTY OF ROANOKE WHEREAS, Roanoke County, VA is committed to ensuring the safety and security of all those living in and visiting Roanoke County; and WHEREAS, fire is a serious public safety concern both locally and nationally, and homes are the locations where people are at greatest risk from fire; and WHEREAS, home fires killed 2,755 people in the United States in 2013, according to the National Fire Protection Association (NFPA), and fire departments in the United States responded to 369,500 home fires; and WHEREAS, working smoke alarms cut the risk of dying in reported home fires in half; and WHEREAS, three out of five home fire deaths result from fires in properties without working smoke alarms; and WHEREAS, in one-fifth of all homes with smoke alarms, none were working; and WHEREAS, when smoke alarms should have operated but did not do so it was usually because batteries were missing, disconnected, or dead; and WHEREAS, half of home fire deaths result from fires reported at night between 11 p.m. and 7 a.m. when most people are asleep; and WHEREAS, Roanoke County residents should install smoke alarms in every sleeping room, outside each separate sleeping area, and on every level of the home; and WHEREAS, Roanoke County residents should install smoke alarms and alert devices that meet the needs of people who are deaf or hard of hearing; and WHEREAS, Roanoke County residents who have planned and practiced a home fire escape plan are more prepared and will therefore be more likely to survive a fire; and WHEREAS, Roanoke County's first responders are dedicated to reducing the occurrence of home fires and home fire injuries through prevention and protection education; and WHEREAS, Roanoke County residents are responsive to public education measures and are able to take personal steps to increase their safety from fire, especially in their homes; and WHEREAS, the 2015 Fire Prevention Month theme, "Hear the Beep Where You Steep. Every Bedroom Needs a Working Smoke Alarm!" effectively serves to remind us that we need working smoke alarms to give us the time to get out safely. THEREFORE, We, the Roanoke County Board of Supervisors, do hereby proclaim October 2015, as Fire Prevention Month throughout this county, and I urge all the people of Roanoke County to install smoke alarms in every bedroom, outside each sleeping area, and on every level of the home, including the basement and to support the many public safety activities and efforts of Roanoke County Fire and Rescue during Fire Prevention Week 2015. Presented this 22nd day of September 2015 rQ�ry P. Jas/n�Peters, , Chairman seph P. McNamara, Vice -Chair an Al(W f3edirbsian Yiosebh B. "Butch" Church d/,c Ada Q mere Charlotte A. Moore ACTION NO. ITEM NO. D-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution of the Board of Supervisors of the County of Roanoke, Virginia requesting the Governor of Virginia to require the Virginia Department of Environmental Quality (DEQ) to provide the appropriate plan review and construction oversight of the Mountain Valley Pipeline Project to protect surface and groundwater resources SUBMITTED BY: Richard Caywood Assistant County Administrator APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: This resolution is a petition to the Governor of Virginia seeking his direction and assistance in causing the Department of Environmental Quality to adequately oversee the environmental aspects of the construction of the Mountain Valley Pipeline. In several recently published articles, the Department of Environmental Quality has indicated that it lacks the necessary personnel and / or funding to provide regulatory oversight to the planning, design, and construction of linear projects such as the Mountain Valley Pipeline project. A sample article outlining this issue is attached to this board report. The absence of plan review and field inspection places Roanoke County's citizens and its water resources at great risk of damage caused by inadequate control of erosion and sediment during construction. Damage could be caused by either poor design of erosion and sediment control measures, poor maintenance of erosion and control devices, storm damage, or a combination of these factors. If DEQ does not provide appropriate oversight to mitigate these risks, the pipeline company and its contractors would essentially be self - policing in these areas. Media reports, and first-hand accounts, of similar projects in West Page 1 of 2 Virginia and Western Virginia would indicate that this approach is not adequate to protect our citizens and our water resources. The County would be further disadvantaged by not being able to adequately respond to citizen inquiries / complaints if there are releases of sediment during project construction. This type of project is exempted under State Code from local ordinances governing land disturbing activities during construction. Therefore, if there is an issue, the County would have no authority to stop the work or require corrective action. Without DEQ taking an active role, there would be no viable remedy for the County to pursue. As the Governor of Virginia has indicated both his support for the pipeline project and his interest in protecting the environment during its construction, we believe that he is compelled to provide the necessary resources and direction to the State agency who has the authority to achieve this goal. The additional clauses in the resolution seek DEQ's collaboration with County Staff and citizens as it crafts its plans to protect our citizens and our water resources. FISCAL IMPACT: This action has no fiscal impact. STAFF RECOMMENDATION: Staff recommends approval of this action. Page 2 of 2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION OF THE BOARD OF SUPERVISORS OF THE COUNTY OF ROANOKE, VIRGINIA REQUESTING THE GOVERNOR OF VIRGINIA TO REQUIRE THE VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ) TO PROVIDE APPROPRIATE PLAN REVIEW AND CONSTRUCTION OVERSIGHT OF THE MOUNTAIN VALLEY PIPELINE PROJECT TO PROTECT SURFACE AND GROUNDWATER RESOURCES WHEREAS, the proposed Mountain Valley Pipeline (MVP) project is a natural gas pipeline system that spans approximately three hundred (300) miles from north-western West Virginia to southern Virginia and, as an interstate pipeline, will be regulated by the Federal Energy Regulatory Commission (FERC). The MVP will be constructed and owned by Mountain Valley Pipeline, LLC, which is a joint venture of EQT Midstream Partners, LP; NextEra US Gas Assets, LLC; WGL Midstream; and Vega Midstream MVP LLC. EQT Midstream Partners will operate the pipeline and own a majority interest in the joint venture. The MVP project will impact six (6) Virginia Counties, including Roanoke County. WHEREAS, sedimentation caused by accelerated erosion from land -disturbing activities during construction is a significant contributor to pollution of the surface waters of Virginia and the United States; and WHEREAS, many miles of the proposed Mountain Valley Pipeline (MVP) project would traverse highly erodible soils with very steep slopes in Roanoke County; and WHEREAS, Roanoke County is required by the Virginia Department of Environmental Quality to implement a comprehensive stormwater management and Page 1 of 4 erosion and sediment control program to reduce the environmental impacts of development projects within the County; and WHEREAS, Roanoke County has been assigned a Total Maximum Daily Load (TMDL) for sediment in the Roanoke River and is required by the Virginia Department of Environmental Quality to implement an action plan to lower sediment loads to the Roanoke River to meet the TMDL; and WHEREAS, the required amount of land -disturbance associated with the MVP excavation is more than twice the area of all land disturbing activities in a typical year for Roanoke County and has the potential to cause severe erosion in the County's steep mountainous terrain, and WHEREAS, many Roanoke County citizens rely on untreated groundwater from wells or springs for their domestic water supplies; and WHEREAS, due to its karst topography, sinkholes and underground channels capable of carrying sediment and other pollutants are widespread in some portions of the County where the pipeline's construction has been proposed to occur; and WHEREAS, without very careful engineering and construction oversight, erosion and sediment from the construction of the proposed Mountain Valley Pipeline could have severe negative consequences for the County's lakes, streams, and rivers as well as its domestic, agricultural, and business water supplies; and WHEREAS, the outdoor beauty and unspoiled nature of the mountain streams and rivers is integral to the County's ability to attract tourism to the Roanoke Valley; and WHEREAS, the Virginia Department of Environmental Quality has the authority to require the submission of site-specific erosion and sediment control plans and stormwater Page 2 of 4 management plans, the authority to review and approve these plans, and the authority to conduct inspections and enforcement of these plans during the construction of the Mountain Valley Pipeline; and WHEREAS, the Freedom of Information Act can be used to obtain public and local government access to such plans, but only if the Virginia Department of Environmental Quality requires the submission of the plans to the agency by the pipeline developer; and WHEREAS, the Virginia Department of Environmental Quality has publicly stated that it does not have sufficient resources to provide adequate oversight to linear construction projects, including pipeline projects such as the Mountain Valley Pipeline. NOW, THEREFORE, BE IT RESOLVED by the Board of Supervisors of the County of Roanoke, in consideration of the points made above, request that: 1. The Governor of Virginia provide adequate direction and resources to the Virginia Department of Environmental Quality to execute its role laid out in the Code of Virginia to adequately oversee and manage the environmental aspects of the construction of the Mountain Valley Pipeline project; including reviewing plans, conducting inspections, enforcing regulations, and when appropriate, reviewing the project -specific plans for the proposed Mountain Valley Pipeline; and 2. The Virginia Department of Environmental Quality is petitioned to require project -specific Erosion and Sediment Control and Stormwater Management Plans for the proposed Mountain Valley Pipeline project that meet all Virginia standards, and that these plans be made available to the County and to the public for review and comment prior to project approval Page 3 of 4 and that the approved plans be made available to the County and the public prior to construction; and 3. Prior to construction, the Virginia Department of Environmental Quality is petitioned to require Mountain Valley Pipeline, LLC officials and third -party inspectors to meet with local officials to discuss the implementation of the project -specific Erosion and Sediment Control and Stormwater Management Plans. AND BE IT FURTHER RESOLVED that the Board of Supervisors of the County of Roanoke, Virginia hereby directs the County Administrator to transmit this resolution to: the Governor of Virginia Terry McAuliffe with copies to the Federal Energy Regulatory Commission (FERC) for inclusion in pre -filing Docket Number PF -15-3-00, Virginia Secretary of Natural Resources Molly Ward, and Virginia Department of Environmental Quality Director David Paylor. Page 4 of 4 ON 117M] 1.1 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder 1N THE COMMUNITY, ABOUT THE COMMUNITY, SINCE 19377. Looking to buy or sell realestate? Click Mere! acountry �—qAasl Ik United Real Estate ►ww.manierey-gra-realestat+r xom (54 0) 468-3370 Looking to buy or sell real estate? Click Mere! ClUnited untr Deal Estate rww.montere -gra-realestatexorn 1540) 468-3370 Group focused on protecting water from pipeline Where the river runs ... PERSPECTIVE BY ANNE ADAMS • STAFF WRITER Columbia Gas of Virginia upgraded a gas pipeline last year in Giles County. The MONTEREY — It's all about the water — the fundamental life block for all living creatures. Those watching the Atlantic Coast Pipeline project evolve have repeatedly warned industrial construction and earth- moving of this magnitude has could seriously degrade water supplies in Highland County, and beyond. It could not only affect human drinking Where's the story7 water from wells and springs, but could pollute the waters of this highly sensitive ecological area, home to hundreds of fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 1/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder company used its own inspectors, but the U.S. Forest Service and Department of Environmental Quality were charged with overseeing compliance with erosion and sediment control laws. (Photo courtesy the Dominion Pipeline Monitoring Coalition) Environmental Quality. species, and the water needed for local farmers' livestock. This week, The Recorder examined 's regulations with regard to water protection, the bulk of which fall under the purview of the Department of Last week, several water quality experts associated with the Dominion Pipeline Monitoring Coalition met with DEQ officials with questions about the agency's role with regard to Dominion's pipeline, and they left Richmond more concerned than ever — DEQ told them it simply does not have the resources to effectively and closely monitor water quality when pipeline construction is under way. DEQ officials told The Recorder the same thing this week: it will review the project as one entire unit, but it does not have the staff to look specifically at multiple points along the pipeline's path. IF ^ 6 Poi. _, _-___ .__d Fencing failed to keep earth and debris from spilling over into the forest during Dominion does construction of Columbia Gas' pipeline plan, however, to project in Giles. (Photos\ courtesy the develop a specific Dominion Pipeline Monitoring Coalition) Erosion and Sediment Control plan for the ACP, addressing every foot along the route. Spokesman Jim Norvelle explained "The plan will be developed during the Federal Energy Regulatory #E Commission's National Environmental Policy Act (NEPA) .. analysis, which will result in a Draft Environmental Impact Statement." Rough material, rock and sediment was not adequately contained at this project last year, and made its way onto private property. The Department of Environmental Quality never inspected the work during construction. (Photo courtesy the Dominion Pipeline Monitoring Coalition) He also confirmed DEQ will not require a plan for its purposes. "The DEQ has informed Dominion that it intends to exempt the company from filing an E&S plan with the state under the oil and gas exemption in the U.S. Natural Gas Act for transmission pipelines and their associated facilities, as a matter of consistency," Norvelle said. "The DEQ said it had used the exemption for other pipeline projects in Virginia." What are the laws? First, some background.has an Erosion and Sediment Control Law. It outlines the fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 2/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder regulations required for almost every kind of construction that could affect water quality. The law describes a "Virginia Erosion and Sediment Control Program" — a program approved by the State Water Control board to keep in check the erosion and runoff associated with land disturbance that could degrade state waterways. The program outlines methods to avoid damage, and ways of inspecting and controlling those methods during activity that moves earth around. There are also "Virginia Erosion and Sediment Control Authorities." These are authorities approved by the board to oversee an Erosion and Sediment Control (ESC) program. They can be a state agency, such as the DEQ, but they can also be a county or town, or a federal entity. They can also be utility companies like Dominion. Permits different for utilities For "linear projects" (think: railroad lines, electric power lines, and all manner of pipelines), there is a special exception to ESC plans. Under the law, utility companies that build such projects, like a gas transmission line, can submit "Annual Standards and Specifications" to the state. This document describes a company's general erosion and sediment control measures for all its projects, and it is supposed to be submitted annually to the state for review. Generally, this Annual S&S plan helps utilities avoid creating site-specific ESC plans for every locality or project segment along a route, as these projects can cross multiple localities and types of terrain. As DEQ spokesman Bill Hayden explained, "We are not able to break a linear project into smaller pieces; we simply couldn't permit every few hundred feet, or even every mile" of such projects. Dominion has submitted Annual S&S plans over the years; the most recently revised version was created in November 2012, and approved by the Department of Conservation and Recreation in April 2013. After that, however, Virginia moved responsibility of erosion and sediment control from the DCR to the DEQ. When the DEQ took over, it re -approved Dominion's same standards in 2014, and then extended approval through July 1 of this year. One of the major concerns raised by the Dominion Pipeline Monitoring Coalition, is that the Annual S&S documents first approved for 2013 do not reflect recent changes in the ESC and stormwater management laws and regulations. Rick Webb of Mustoe, spokesman for the coalition, explained, for example, Virginia's new laws call for calculating runoff conditions at a site after construction. Dominion's Annual S&S plan does not include those calculations, as it was drafted prior to the change. Hayden said DEQ has not yet received a new Annual S&S plan from Dominion. However, he noted, for Dominion or any other utility with such plans, "if someone requests it, DEQ will grant an extension until the end of the year as a matter of routine." fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 3/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder Once DEQ has a plan, the agency has 60 days to review it. "But it's all up in the air right now," Hayden said. Webb said DEQ officials told the coalition they have been holding meetings trying to determine what to do with the plans since they are no longer compliant with new regulations. "They'll probably just extend them again," Webb said. Dominion's Norvelle confirmed DEQ would extend standards for all who request it, and "Dominion is currently seeking extension," he said. What are the standards? Dominion's Annual S&S document is 110 pages long, and identifies the range of measures the company might use to control damage to waterways — from silt fences to trench breakers, and drain tiles to seeding methods, depending on the circumstances. It describes the internal inspection and management process, too. For each project, Dominion explains in the plan, it will assign an inspection staff "suitable for the size of the project." This staff is headed by a construction supervisor. One of the inspectors will be appointed the "environmental coordinator." That person is responsible for understanding the Annual S&S plan, site conditions, and permit conditions. He or she reviews how the plan is implemented, and is to "resolve apparent conflicts between permits and this plan, and coordinate with the construction supervisor about additional measures which may be needed to address erosion and sedimentation." For any project larger than 10,000 square feet in area, there will be a "Responsible Land Disturber" who holds an RLD certificate. This RLD, Dominion explains, "will fulfill the FERC inspector's role." And, the RLD will have "peer status" with the other inspectors, and the "authority to stop activities that violate the environmental conditions of the FERC certificate or other authorizations and order corrective action." The Annual S&S plan includes a long list of the RLD's responsibilities. For projects where more than 500 feet of trenching will be needed, Dominion employs a state - certified inspector to cover compliance. Dominion's Annual S&S makes specific reference to some Virginia laws, but more often seems to follow the more general regulations created by the Federal Energy Regulatory Commission. FERC is the agency reviewing Dominion's ACP, and DEQ will be responsible for Virginia's input as FERC does its review of the project. Webb said DEQ officials told the coalition that DEQ would collect and summarize comments from several other state natural resource agencies and give that information to FERC. The Annual S&S plan outlines all the ways Dominion can prevent water quality degradation and stabilize soil to prevent runoff during and after construction. fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 4/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder It also states that sensitive areas such as wetlands, water body crossings or residential developments, or areas that require specialized construction like boring or directional drilling, will be treated as separate construction projects. In at least one case, a site-specific Erosion and Sediment Control plan is explicitly required — for directional drilling under stream crossings, which can have a direct effect on waterways. So, what's the problem? With such a detailed set of standards for ESC, why should anyone be concerned about the ACP's effects on water quality in Highland, or anywhere else? The Dominion Pipeline Monitoring Coalition will tell you: it's because DEQ does not inspect these projects, and the Annual Standards and Specifications do not explain how Dominion will handle construction in this particular area, at specific places, such as steep mountainsides and over karst, where the effects could be much more serious. The DPMC would like to see DEQ require Dominion to submit site-specific ESC plans for this project, but it's not convinced DEQ will do that. Under Virginia law, Annual S&S documents serve as the ESC plans for projects like pipelines, and in this case, Dominion would serve as its own ESC "authority," with its own reviewers and inspectors. DEQ can require specific ESC plans, however. Under the law, it states, "The submission of annual standards and specifications to the department does not eliminate the need where applicable for a project specific Erosion and Sediment Control Plan." As members of DPMC say, "where applicable" is the key phrase. So far, they note, DEQ has not required more specific ESC plans for utilities operating under Annual S&S plans. DEQ officials told them it wasn't practical. DEQ does not have the staff or resources to inspect projects like this, they said, so there was little point in requiring specific ESC plans they cannot inspect or review. DEQ's Hayden had a somewhat different perspective; he told The Recorder it's just too early to say whether DEQ will ask for specific ESC plans for this project. DEQ has not yet received Dominion's resubmission of its Annual S&S, and has not received any applications for ESC plans or other permits. Hayden agreed, however, that DEQ is not equipped to apply further scrutiny, not just to Dominion's ACP, but to any large, linear project operating under Annual S&S plans. "Breaking these projects into pieces," he said, "would significantly increase the workload on our staff. We couldn't handle it." Dominion has said, according to the company's own timeline, it will apply for any needed permits by the end of the summer. fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 5/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder The concern from the DPMC, however, is that Dominion will not submit site-specific erosion and sediment control plans, and local governments and citizens affected will not have an opportunity to review such plans before construction, or during and after. Hayden added, however, that anything is possible and DEQ has not yet determined what it will do with regard to the ACP project. "It depends on when we get a plan submittal," he said. "Right now, we have no timetable." Is it possible DEQ might inspect this project? "Yes, it's possible," Hayden said. "We really can't predict that, but we would anticipate some inspections." The meeting with DEQ DPMC representatives traveled to Richmond May 12; they met with DEQ director of operations James Golden, Fred Cunningham of the office of VPDES permits, Andrew Hammond and Larry Gavin of the office of storm water management, and Bettina Sullivan of the environmental impact review program. Pipeline coalition members included the organization's coordinator, Webb, a water quality expert; Kirk Bowers of the Virginia Sierra Club; Malcolm Cameron, DPMC's slope stability analysis coordinator; Pam Dodds, consulting hydrologist with Laurel Mountain Preservation Association; and Arthur Dodds, cartographer for the association. DPMC's take -away from the meeting was that DEQ does not have the resources to run its regulatory program in strict adherence with requirements, "a constant theme and explanation for shortcomings or lack of rigor," Webb said. Who's watching? One of the biggest concerns, according to the DPMC, is that without specific ESC plans, localities and citizens in Virginia affected by linear projects have no opportunity to review a plan before construction begins, nor gain access to the reviews and inspection reports that follow during construction. "There is no access to erosion and sediment control and storm water management plans or inspection reports, and thus no real oversight by the DEQ, localities, or the public," Webb explained. This is because companies using Annual S&S hire their own plan reviewers and inspectors; the plans are typically kept on site at projects, in construction trailers, but not made public, nor given to DEQ. And DEQ staff does not typically go to construction sites to review them, either. "The DEQ position is that it cannot justify asking for the plans, given that it has no staff to review them," Webb said. "DEQ instead relies on construction companyhired plan reviewers." Hayden said he believed Dominion's inspector would be required to turn over inspection reports to the DEQ, and thus, citizens or local governments would have access to them as public documents. "DEQ will have them," he said. Webb said, however, he doesn't think that's true. In fact, the coalition examined a smaller Columbia fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 6/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder Gas project in Giles County and found DEQ not only did not have the inspector's reports, the agency didn't inspect the project independently at all. (See sidebar, `Different project'). Gaining public access to a specific ESC plan for the ACP is one of the coalition's concerns, but more importantly, the DPMC worries about water quality protection when the fox seems to be guarding the hen house. "It is to the advantage of pipeline construction companies to operate under Annual S&S approval versus the Erosion and Sediment Control program that applies to other companies because review and oversight are minimal," Webb said. He pointed out that: • Such companies do not have to apply for plan approval from local governments; • No one other than company staff or contractors reviews site-specific ESC plans; • No one other than company staff inspects the projects; and • Local governments have no authority to inspect the projects for compliance. • DEQ has the authority to require specific ESC plans and inspect projects but doesn't due to lack of staff. DEQ inspections are entirely complaintdriven-, in other words, DEQ doesn't look at these projects until someone calls to tell them something is wrong. "There is no actual oversight and enforcement of " ,..`-;,;_,,'s ESC and stormwater management requirements for pipeline construction," Webb said. "Dominion spokesmen have repeatedly stated that pipeline construction is highly regulated with respect to water resources protection, and our governor has promised that the ACP will not cause environmental harm. But it's essentially a voluntary compliance system." Webb said the coalition has little reason to expect that pipeline companies, on their own, without independent oversight, will strictly comply with water -related laws and regulations. "There is always pressure to cut corners," he said, "and pipeline companies simply cite problems with subcontractors when things go wrong. No one in charge is willing to take actual responsibility." He points to Dominion's recent water violations in West - := and to other pipeline projects the coalition has studied. He says the coalition has strategies for dealing with what he calls a "broken regulatory system." (See sidebar, `Coalition has a strategy'). Dominion, for its part, says the ACP project will be in compliance with all state regulations. There will be an Erosion and Sediment Control plan for the entire project in accordance with FERC standards, Norvelle said. In addition, the plan will meet the requirements of the Virginia Standards and Specifications that are approved by DEQ, he said. fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 7/8 9/10/2015 Group focused on protecting water from pipeline I www.therecorderonline.com I Recorder "Construction will be inspected for compliance with the plan by FERC personnel, inspectors under contract to FERC, and Dominion inspectors. The FERC contract inspectors remain on the job at all times," Norvelle explained. "The plan will address every foot of the project." "We'll have to see what that means," Webb said, "and I'm pretty skeptical." The fact that DEQ would simply exempt Dominion, or any other company, from complying with state laws doesn't sit well with the coalition. "Under what law do we just not require state compliance because it seems to be compliant with federal law?" Webb asks. "I seriously question the right of DEQ to simply exempt any company from state law just because it says it's following federal law. We'll have to see what that means, too ... It borders on incoherent. If there's any precedent for that, it needs to be challenged ... We're talking about state law; the DEQ is responsible, and fundamentally, we still want access to the plans and I don't think we'll see them in any context under a National Environmental Policy Act review. Maybe it should; maybe it will. But we'll see." Return to to p Share Save Copyright © 2006-2015 The Recorder, All Rights Reserved Newspaper web site content management software and services fi le:///P:/Pi pel i ne/Group%20focused%20on%20protecti ng%20water%20from %20pi pel i ne%20_%20www.therecorderonl i ne.com %20_%20Recorder.htm I 8/8 ACTION NO. ITEM NO. E-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY. VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution approving and adopting an amendment to the Comprehensive Plan for Roanoke County, Virginia identifying Designated Growth Areas SUBMITTED BY: David Holladay Planning Administrator APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: At the September 8, 2015, Board of Supervisors work session, staff discussed a proposed amendment to the Roanoke County Comprehensive Plan. The proposed amendment would document existing maps, text and future land use designations within the Comprehensive Plan, and add a State Code reference within the Comprehensive Plan in order to satisfy new criteria for transportation project funding. House Bill 2 (HB2), signed into law in 2014, provides for new methods and procedures for scoring and funding transportation projects in the Commonwealth of Virginia. According to the Department of Rail and Public Transportation, through the new process, "Candidate projects will be screened to determine if they qualify to be scored. Projects will be scored based on an objective and fair analysis applied statewide. The law will improve transparency and accountability. The public will know how projects scored and the decisions behind the CTB's project selections." In order for projects to be eligible to be considered within H132, initial screening will require the project to serve Corridors of Statewide Significance, Regional Networks or Urban Development Areas. Corridors of statewide significance are key multimodal travel corridors, such as 1-81,1581, Route 11, Route 220, and Route 460. Regional networks are Page 1 of 3 multimodal networks that facilitate intraregional travel within urbanized areas. Most areas within Roanoke County fall within this regional network definition. The third screening criteria, Urban Development Areas (UDA) is the subject of this proposed amendment. Urban development areas are locations where jurisdictions intend to concentrate future population growth and development consistent with the UDA section within the Code of Virginia (Section 15.2-2223.1). This includes UDAs that have been officially adopted by local governments, as well as "including any locally designated growth areas that have a comprehensive plan reference to the UDA section as qualified for H132 screening, even if they are not named UDAs". This code reference must be included in the Comprehensive Plan prior to October 1, 2015, in order to qualify for the first round of H132 project screening. The proposed amendment documents existing designated growth areas within the currently adopted comprehensive plan, map those areas, and insert the proper state code reference within the document. The attached maps shows six designated growth areas, categorized based on general geographic regions, or in the case of Village Centers, a group of rural commercial nodes. The maps reflect the areas of Roanoke County that are currently designated one of the following Future Land Use categories of the Comprehensive Plan: • Village Center • Neighborhood Conservation • Development • Transition • Core • Principal Industrial • Economic Opportunity • Suburban Village • University • Glenvar Village • Mixed Use Proposed Amendment The proposed amendment would be added to the Roanoke County Comprehensive Plan in Chapter 3: Land Use Issues, Section 7, Growth Management & Capital Facilities Planning. On page III -43, under the heading LAND USE RECOMMENDATIONS FOR GROWTH AREAS, the first paragraph would be amended to include recently added future land use designations: Economic Opportunity, Suburban Village, University, Glenvar Village, and Mixed Use. A new third paragraph would be added to this section, referencing these Designated Growth Areas, per Section 15.2-2223.1 of the Code of Virginia. The above referenced map would be included following Section 7. Attached to this report is the proposed amendment, with new language highlighted in red, Page 2 of 3 and deleted language struck through. FISCAL IMPACT: None ALTERNATIVES: Adopt the attached resolution. 2. Do not adopt the attached resolution. STAFF RECOMMENDATION: Staff recommends alternative 1. Page 3 of 3 �j m Kel Kej 9LOZaa6nV»psaupo«_o ®^^©«edW® g.a ewe e _m SeO]v q$mo]E) pajeu5|SO(i posodO]d . \Z Chapter 3: Land Use Issues CHAPTER 3 LAND USE ISSUES 1. CITIZEN PARTICIPATION Introduction Roanoke County encourages citizen participation in all elements of the government. The challenge is to keep the level of citizen interest high and to make their active participation in the workings of their government as convenient and easy as possible. The participation of an informed citizenry is a critical element in the success of this community plan and of other County initiatives. This plan reflects the hopes and desires of County citizens for the future and is dependent on their continued support, diligence and commitment. Goal To achieve the highest possible level of citizen participation in all elements of Roanoke County government by keeping our citizens informed and educated on public policy issues and by maintaining an open, democratic, and easily accessible governmental system. Issues and Opportunities The Roanoke Valley government and public education television channel (RVTV) provides information on local government issues for Roanoke County, the City of Roanoke and the Town of Vinton in addition to broadcasting City Council and County Board of Supervisors meetings. It also provides a bulletin board of announcements concerning job opportunities, upcoming events, tax information, etc. RVTV is not available to the entire county population due to cable access constraints. For the most part, there are not major neighborhood concerns or county -wide problems that citizens feel a need to unite, organize or rally around. When seeking input on planning initiatives, such as revisions to the zoning ordinance, it is sometimes difficult to get a broad spectrum of comments from a variety of people, groups and organizations. For example, it seems that neighborhood -based and environmental -based groups are not as well organized or financed as other special-interest groups, that because of financial interests, are highly motivated to participate in such efforts. Chapter 3: Land Use Issues • As shown every year in the citizen survey that the County conducts, the vast majority of County citizens are satisfied with the level of government services they are receiving. • Civic leagues exist in all areas of the County and are effective in getting zoning violations remedied and organizing neighborhood crime watch efforts. • Because of the general level of satisfaction with government services, the majority of County citizens tend to be reactive rather than proactive on public policy issues. • The County has a Deputy Assistant to the County Administrator whose major job responsibility is to assist citizens in resolving problems they may be having with a County policy, requirement or regulation. • The County holds all public hearings and community meetings in the evenings to allow the general public to participate in them. • The County Administrator holds quarterly meetings with the civic league presidents. • Community meetings are often held to obtain citizen input on rezoning petitions prior to the Planning Commission public hearing. • The County has a web page that provides information on the county government and services and linkages to other regional, state and federal government sites. • The Community Plan citizen participation process developed neighborhood councils consisting of citizens from each of the community planning areas. Objectives A. Ensure that all citizens have full and appropriate access to information concerning their government. B. Encourage all citizens, of all ages, to participate to the fullest extent possible in public meetings and hearings. C. Provide assistance to any neighborhood or community area that wants to establish a civic league. D. Promote the use of the most effective and efficient methods to communicate issues and policies to the citizens and to receive their input and suggestions. E. Treat all citizens with the utmost respect and courtesy. Listen and respond promptly to their comments and suggestions. III -2 Chapter 3: Land Use Issues Implementation Strategies 1. Enhance and expand the role of the neighborhood councils. Utilize these councils to gather neighborhood input on a variety of topics such as rezoning petitions, neighborhood plans and other local issues. (Obj. B, D, E) 2. Develop and fund a County Page quarter -page notice in the Roanoke Times. This could run once a month and would provide information on public policy issues, upcoming public hearings and community meetings, road projects, etc. (Obj. A, D) 3. Expand the coverage of RVTV. (Obj. A, B, D) 4. Develop a quarterly newsletter that covers Department of Community Development issues such as planning, zoning, progress toward goals of the community plan, stormwater, drainage, roads, etc. This should be posted on the Roanoke County Home Page and distributed to organizations, civic leagues, PTA's, neighborhood councils and a general public mailing list. (Obj. A, B, D) 5. Develop a network of contact people with all neighborhood and special interest groups so that they can be notified and involved in public policy issues. (Obj. A, B, C, D, E) 6. Encourage, as part of the application process, all rezoning petitioners to hold community meetings, unless exempted by the Zoning Administrator. (Obj. A, D) 7. Once a year, hold a meeting of the Board of Supervisors and Planning Commission in each magisterial district of the county - Hollins, Catawba, Windsor Hills, Cave Spring and Vinton. (Obj . A, B, D, E) 8. Roanoke County should provide its citizens the opportunity to interface with each other and the capability to access all community services through the latest communications technologies. (Obj. A, D) III -3 Chapter 3: Land Use Issues 2. DESIGN GUIDELINES Introduction Establishing design guidelines to promote quality development and enhance the unique character of communities within the County is an important component of Roanoke County's Community Plan. These guidelines are intended to facilitate development creativity and provide incentives for development design principles that will result in the enhancement of the visual appearance of the built environment in the County. They relate to such items as: site development, relationship of proposed land uses to adjoining land uses and buildings to adjoining buildings, relationship of buildings to their site, site layout, parking lots, landscaping, building design, lighting, and signs. The results of the Neighborhood Council process re -enforce the idea of guiding development design with the following themes voiced by all the communities within the County: • New development should incorporate a high standard of design including the following design elements: appropriate architecture, landscaping, and signage. • Encourage neighborhood involvement in the design process associated with any development proposal through citizen meetings with developers. • New developments should be designed and planned as cohesive communities. • Incompatible land uses should be buffered from adjoining land uses. • New developments should be required to design around existing, healthy stands of trees and/or individual specimen trees where possible, to preserve trees that are outside of the building envelope and to replace trees when existing trees must be removed. Goal All new and redeveloped sites are designed to be in harmony with their surroundings, improve the general appearance of the site and strengthen community identity. Issues and Opportunities Design guidelines may provide a level of comfort with a proposed development that otherwise would not exist. Design guidelines may help assure that development reflects the unique characteristics of the community. The citizens of Roanoke County appear to be very supportive of design guidelines. III -4 Chapter 3: Land Use Issues Objectives A. Develop and incorporate design guidelines for all future development in the County, excluding individual home sites and farm buildings. B. Involve citizens, businesses and community leaders in the creation of community specific design guidelines. Implementation Strategies Continue to support and expand as necessary the Hollins Village/Williamson Road redevelopment initiative using public funds as a catalyst to stimulate private investment. 2. Identify and ensure that the gateways into the County are attractive and enhance the community's identity. 3. Encourage through community meetings, public participation in the development of design guidelines for land in Roanoke County. 4. Provide education and outreach to the public emphasizing the importance of developing design guidelines for the County. 5. Be firm about goals, but flexible about how to attain them. Land Use Designations The Plan designates the following land use areas. Each designation has a set of design guidelines that pertain to development issues within that area. Conservation - These areas are characterized by significant environmental and cultural features such as mountains, ridgetops, wildlife habitat, forests, rivers and lakes. Rural Preserve and Rural Village - These areas are characterized by rural landscapes where protection of the rural character is desired. Village Center - These rural village centers, where established crossroad communities are present, serve as focal points for the surrounding rural areas. Neighborhood Conservation - These are established residential neighborhoods where conservation and continuation of the existing housing pattern are desired. III -5 Chapter 3: Land Use Issues Development - These areas are characterized by new residential growth and a variety of housing types and densities. Transition - These areas are corridors where current commercial strip development patterns exist or future development pressure is possible. Core - These are commercial, retail areas where suburban centers of high intensity urban development are present or expected. Principal Industrial - These are areas where high technology industries and research and development firms are present or may develop. Scenic Corridors - These are areas encompassing a current or possible future designated scenic corridors. Design Guidelines Conservation Certain areas within the County are designated as Conservation because of significant environmental and cultural features such as mountains, wildlife habitat, clean water resources or scenic beauty. The Conservation land use areas include part of the George Washington/Jefferson National Forest, the Appalachian Trail corridor, Havens State Wildlife Management Area, Carvin's Cove Reservoir, Spring Hollow Reservoir, Blue Ridge Parkway viewsheds, the higher elevations of Read Mountain and a County owned portion of Sugar Loaf Mountain. When the specific data is available, the viewsheds from the Appalachian Trail should be included in this designation. The primary goal of the following objectives and guidelines is to protect and preserve the inherent environmental and natural resources within the County. Objectives A. To recognize existing areas within the County that fit under the Conservation land use areas and establish guidelines to protect and preserve them. B. Identify, evaluate and work to assure the preservation of wildlife habitats and corridors, natural landmarks, historic and archaeological sites, significant agricultural lands and examples of natural heritage. Maintain a registry of qualified areas and link decisions concerning land and easement purchases and new developments with the conservation framework established. C. Encourage the establishment of additional Conservation land use areas through conservation easements, greenways and parks that in the end result, create a network of interconnected Conservation areas. III -6 Chapter 3: Land Use Issues D. Provide assistance and incentives for land owners to maintain natural areas. Work with landowners and other entities to promote sound conservation practices and where appropriate, establish cooperative management plans. Encourage private owners to investigate and utilize the preservation programs offered by other governmental entities and private foundations. Guidelines 1. Use Conservation land use areas to preserve: critical ecosystems; scenic vistas; fish and wildlife habitats; natural resources and landmarks; outdoor recreation areas; cultural, historic and archaeological areas; connections and trails; access to public waters and other useable open space lands; scenic waterways or highway corridors; important forest lands, range lands, or agricultural lands; aquifer recharge areas and surface water. 2. Resource extraction should be carried out in a manner that preserves open space along stream corridors, minimizes the impacts on the land and is compatible with adjacent land uses. Reclamation plans should be reviewed and processes monitored to ensure the area's continued significance. 3. Isolated wetlands, stream corridors, lakes, drainage areas and their associated riparian areas should be preserved, protected and used for a variety of open space purposes such as landscape features, irrigation, water quality protection, buffers, wildlife habitat and flood control. 4. Development of any kind should be planned, designed and constructed to avoid or minimize the degradation of natural and cultural resources. 5. Minimize habitat fragmentation from the combined effects of development, roads, trails and an overall increased human presence. 6. Place adequate buffers around sensitive sites. 7. Restrict development of structures, such as residential, commercial or industrial facilities, on slopes greater than 20%. Allow passive recreational uses, such as picnic shelters, greenways and trails in these areas. 8. Restrict development within 100 feet of a water course, excluding passive recreational uses, water related recreational uses or incidental utility uses. 9. Significant scenic views should be preserved and a detailed inventory developed. III -7 Chapter 3: Land Use Issues Rural Preserve and Rural Village In those areas of Roanoke County designated as rural and/or agricultural where local officials and residents are looking for preservation options, certain design strategies can be followed. Through the use of these design strategies land will remain available for productive agricultural activities and open space, developers are not placed under any unreasonable constraints, and realtors gain a special marketing tool, in that rural views from the new homes will be guaranteed by the conservation easements. Objectives A. While allowing future development, employ design strategies that leave land available for productive agricultural activities and open space. B. Preserve rural views and vistas. Guidelines Encourage cluster developments that set aside 50 to 70 percent of the parcel as open space, and preserve or incorporate existing site features into the overall design. 2. Require that rural subdivisions be buffered and set back from roadway view. 3. Decrease the number of new driveways fronting on public roads. 4. Decrease the obstruction of views by new developments by strategically locating buildings on the site. Locate buildings either in a wooded fringe at the edge of field or set back and buffer them from fields and public roads through the use of landscaping. 5. Buildings located on prominent mountain sides should use exterior colors and textures to aid in them blending into the landscape. 6. Discourage the siting of buildings on ridge lines. Village Center There are numerous Village Centers throughout the rural and suburban areas of Roanoke County. These centers are established crossroad communities which have traditionally served as focal points for the surrounding area. They play a functional role in providing homes, limited neighborhood- oriented commercial services and businesses, and civic buildings such as churches, post offices, fire stations and schools. Many of the Village Centers in Roanoke County contain historic structures and/or sites, which should be preserved through local historic district zoning. These Village Centers each have a unique character and sense of place with which local residents easily identify. III -8 Chapter 3: Land Use Issues Objectives A. Collaborate with community members to develop design guidelines for Village Centers to protect and enhance the existing village character and historic qualities. B. Establish provisions which allow for limited mixed-use development in existing Village Centers, and permit the future development of additional Village Centers in appropriate locations throughout the County. Guidelines Design and build new construction to blend in with the existing buildings in the village. New construction should be compatible with the existing village in respect to height, size, character, massing, roof shapes, material, and door/window proportions. 2. Locate and cluster institutional services at Village Centers to enhance community identity. 3. When existing buildings create a characteristically close relationship with the street, retain this pattern in order to preserve the community's character. 4. Reduce the visual impacts of parking areas upon community character through placement, landscaping and buffering requirements. 5. Screen open storage areas, exposed machinery, and outdoor areas used for storage from roads and surrounding land uses. 6. Preserve roadside trees due to their important role in defining the character of a community and encourage the planting of new roadside trees. 7. Design exterior lighting and signs as integral architectural elements of the building and site. 8. Control lighting in both height and intensity to maintain village character. Shield luminaries to prevent excessive lighting and glare beyond lot lines. 9. Encourage compatibility or shared use of signs for adjacent businesses. Maintain good scale and proportion in sign design and in visual relationships to buildings, surroundings and views. 10. Encourage the re -use of historic structures. 11. Create historic district overlay zoning for appropriate village centers. III -9 Chapter 3: Land Use Issues Neighborhood Conservation Single-family neighborhoods are traditionally the most protected land uses. The strategic placement of non-residential land uses, such as parks, schools, libraries and churches (determined by neighborhood preference and need) can play a vital role in preserving and enhancing neighborhood character. Also, creative site planning practices can enhance the opportunity for attached housing to achieve compatibility with adjacent detached housing. Objective A. Preserve and enhance the existing character of established neighborhoods through boundary protection and the addition of desired amenities. Guidelines 1. Screen and buffer adjacent non -compatible land uses. 2. Incorporate greenways within neighborhoods as well as from neighborhoods to adjacent institutional services, other neighborhoods and commercial centers. 3. Encourage infill of vacant lots with similar density housing. 4. Any additions or changes to existing neighborhoods should be compatible with established (underlying) site patterns. 5. Allow well-designed low impact service oriented businesses to locate near neighborhoods. Development These areas of new residential growth have the most opportunity for innovative land development practices. Cluster developments with a mix of housing types and densities, limited retail support, and efficient layout of streets can prevent sprawl and create self-contained neighborhoods with combined living and working areas. These areas also respond to the current needs and demands of smaller families and energy/resource conservation. The protection and inclusion of environmental processes and natural site amenities, such as drainage systems and vegetation, should be priorities for all new developments. Objectives A. Encourage the development of planned residential communities and cluster developments that protect and incorporate environmental features and resources within the developed area. III -10 Chapter 3: Land Use Issues B. Within the development areas, plan for an interconnected framework of greenways, parks and activity/retail centers. Guidelines Take an inventory of all environmental features and resources present on site in order to create a site development plan that is able to preserve and benefit from the existing natural features. 2. Use those existing site features to create a common framework within a mix of housing types and densities. 3. Retail support should be located in central locations, easily accessible by car, bike or foot. 4. Lay out streets in an efficient manner, but avoid creating main thoroughfares that can attract heavy amounts of traffic. 5. Neighborhoods should be easily identifiable; create gateways at major entrance points. 6. Create common recreational open space for all neighborhood residents. 7. Protect, and enhance when possible, scenic views to and from the site. Transition Certain roadways within the County have become or have the potential of becoming primary corridors where current strip development pressures exist. Within these corridors access and aesthetics should be controlled in order to avoid unappealing forms of commercial strip development and the resultant traffic congestion. Objective A. Establish development and design guidelines for future development along designated key road corridors and gateways into the County. Guidelines Support and expand the public-private partnerships in the redevelopment of older commercial corridors in the County. 2. Establish provisions which discourage strip development along corridors and promote planned development nodes located at major road junctions. Chapter 3: Land Use Issues 3. Redevelopment of existing strip developments should stress the importance of reducing the number of entrances, coordinating signage and parking and increasing vegetative buffers. 4. Encourage the interconnection of parking lots and the reduction of driveways along primary, arterial and collector roads. 5. Coordinate vehicular and pedestrian movement among adjacent sites. 6. Preserve, enhance, and/or incorporate into the design natural site resources such as topography, vegetation, views to and from the site and drainage ways. 7. Plan the site to provide a desirable transition with the streetscape. Provide space for adequate planting, safe pedestrian movement, and screened parking areas. Provide an inviting atmosphere for the pedestrian through grades of walks, parking spaces, terraces, and other paved areas. 8. Buffer along rear property lines where development backs up to less intensive residential uses. 9. Design exterior lighting and signs as integral architectural elements of the building and site. Encourage compatibility or shared use of signs for adjacent businesses. Maintain good scale and proportion in sign design and in visual relationships to buildings, surroundings and views. 10. Ensure unity of landscape design by repetition of appropriate plants that are indigenous to the area through coordination with adjacent properties. 11. Buffer adjacent incompatible land uses by landscaping, earth berms, walls and fences or combinations of these elements. Use landscaping to enhance architectural features and viewsheds and provide shade. 12. Provide incentives to utility companies to place newly installed utility services and service revisions necessitated by exterior alterations underground where possible. Core Core areas by nature have the potential of becoming congested and visually cluttered districts. Therefore, it is essential that in these areas property owners establish common planning goals in new developments and redeveloping areas to ensure safe, accessible, and visually pleasing Core areas. III -12 Chapter 3: Land Use Issues Objectives A. For each respective Core area, establish common characteristics that will ensure ease of travel and visual coherence. B. Encourage the redevelopment of congested Core areas. C. Encourage the development of high density residential that is integrated with commercial development. D. Create pedestrian -oriented Core areas to ease traffic congestion. E. Concentrate intensive commercial uses into one area rather than in long linear corridors. F. Develop strategies to accommodate large box retail uses. Guidelines Common links between adjacent sites and land uses should be made whenever possible to ensure connectiveness in these areas of high intensity urban uses. 2. Site -to -site movement for vehicles, pedestrians and bicycles should be easy and safe. 3. Encourage the interconnection of parking lots and the reduction of driveways along primary, arterial and collector roads. 4. Building size, shape, height, and materials should complement adjacent buildings. 5. Natural site amenities, especially slopes, trees and drainage, should be conserved to the maximum practical extent. 6. Create common areas as buffers along the edges of Core areas that adjoin less intensive land uses. 7. Designate and establish landmarks - public buildings, monuments, squares and mini - parks - to strengthen the identity of community Core areas. 8. Design exterior lighting and signs as integral architectural elements of the building, site and Core area. Encourage compatibility or shared use of signs for adjacent businesses. Maintain good scale and proportion in sign design and in visual relationships to buildings, surroundings and views. 9. Encourage the siting of communication antennae and dishes on existing or new structures rather than on stand-alone towers. III -13 Chapter 3: Land Use Issues 10. Research and develop design and site development strategies to accommodate large box retail uses and allow them to have a positive relationship to the surrounding community. Principal Industrial Through innovative planning practices, many industrial areas can become beneficial to adjacent areas, providing jobs for nearby residents and customers for commercial areas. Objectives A. Create industrial districts that use environmental design practices in their development and become assets to surrounding neighborhoods. B. Encourage cluster developments within industrial districts, combining industries, support retail and open space. Guidelines Inventory existing site natural features and resources as a first step in development. 2. Protect and utilize natural features and resources wherever deemed helpful in combating the negative aspects that industrial developments create, such as noise, air emissions, waste discharge, and increased runoff. 3. Where industrial development is adjacent to residential areas, apply exceptional design measures to achieve compatibility. 4. Provide direct access to sufficient capacity public streets. 5. Avoid slopes in excess of 15% for building sites. 6. Take advantage of slopes to break up large parking areas. 7. Plan for trees in parking lots to provide shade (at least one per 20 spaces). 8. Consider the use of pervious pavement for large parking areas. 9. Provide buffering for adjacent land uses in the form of a vegetative screen, open space or a communal greenway. 10. Allow opportunities for industrial site employees' to use alternative modes of travel, such as biking or walking. III -14 Chapter 3: Land Use Issues 11. Encourage the siting of communication antennae and dishes on existing or new structures rather than on stand-alone towers. Scenic Corridors Throughout the County there are important corridors where access, aesthetics and future development should be managed in order to preserve scenic rural views and vistas. Objectives A. Preserve identified critical scenic views along the Blue Ridge Parkway, Appalachian Trail, Roanoke River and other scenic corridors. Vistas and overlooks should be protected from the encroachment of development and signage. B. Preserve the scenic integrity of important road corridors and historic sites throughout the County. C. Designate scenic routes throughout the County where development and design standards can be applied to protect important natural views and vistas. D. Create overlay protection zones for these scenic corridors. Guidelines Produce viewshed maps, as seen when traveling the corridor, to delineate the boundaries of the corridor protection area. 2. Limit the number of access points to adjoining properties by combining driveways. 3. Create a minimum 25 foot natural landscape buffer along the corridor. 4. Limit construction to relatively flat areas (less than 15%) on properties adjoining the road. 5. Consolidate small lots into large parcels to encourage unified development and site planning. 6. Within the scenic corridor, limit structure height to a maximum of 25 feet. 7. Identify major public view points in which prospective developers must develop in accordance with adopted design standards. 8. Discourage the placement of broadcast towers along scenic roads or in scenic viewsheds. III -15 Chapter 3: Land Use Issues 3. NEIGHBORHOODS Introduction Our basic instincts and human nature seek a sense of community, a sense of place where we live, work and play. In Roanoke County, neighborhoods are the backbone of the community. Residents of the County identify very closely to their own neighborhoods and especially to their elementary school districts. This is exemplified by the high attendance at elementary school Parent Teacher Association meetings and youth sports events, festivals and social events that are held at the neighborhood level. The results of the 1995 visioning citizen survey showed that residents associate more closely with their own subdivisions and neighborhoods than with the County as a whole. This makes it very important to preserve community meeting places such as neighborhood schools, fire and rescue buildings, community centers and community stores. These meeting places serve the same function as neighborhood taverns in more urban locales. It also becomes more critical to preserve those natural, historical and cultural features of a neighborhood that lend uniqueness and that feeling of being home - a sense of place - to the area. Many neighborhoods in Roanoke County are reaching middle -age - they were built in the late 50's, 60's and early 70's. These communities provide an abundant source of good, affordable housing to citizens throughout this region. It is important to preserve the stability of these areas by finding creative ways to maintain property appearances and housing integrity, thereby maintaining property values in these communities. Some older Roanoke County neighborhoods will continue to feel pressure for redevelopment as large tracts of commercial property become harder and harder to find. It is important to encourage community redevelopment and infill development along appropriate road systems and in appropriate commercial service areas. If we as a community are successful in managing growth - encouraging and directing growth toward those areas of the County that can support it - preserving viewsheds and open space and retaining an agricultural base, we need to recognize that there will be more and more pressure for infill development and the redevelopment of existing sites in the more urban areas of the County. This will require some changes in densities and uses in what used to be stable neighborhoods and must be done with appropriate design guidelines, citizen input and the involvement of commercial interests. Goal Continue to recognize the importance of Roanoke County neighborhoods and work to preserve the institutions and natural, cultural and historical features that help to define these communities. III -16 Chapter 3: Land Use Issues Issues and Opportunities • Many Roanoke County neighborhoods have active civic leagues and community watch programs. In addition, as a part of the Community Plan process, neighborhood councils were formed in each of the twelve community planning areas around the County. • Roanoke County elementary school Parent Teacher Associations often have participation at the one -hundred percent level. • There is a long-term tradition and commitment to neighborhood schools in Roanoke County. • Many Roanoke County neighborhoods were built almost 40 years ago. These areas are, to some extent, beginning to show their age and require more and more maintenance and upkeep. • The older neighborhoods in the County provide a good source of affordable housing. • Some of the older Roanoke County neighborhoods, that are located in close proximity to commercial centers and primary road access, are subject to redevelopment pressures from commercial interests. • Most Roanoke County neighborhoods are very dependent on the automobile with very limited pedestrian trails and sidewalks. • County neighborhoods tend to be very stable. • There are only a few neighborhoods in the County that have a mix of residential densities or commercial uses. • The strong economic base of the County has meant that property values are steadily increasing. • Youth sports events - such as little league, soccer and softball - are great opportunities for neighborhood friends and acquaintances to meet and greet. • The Roanoke Valley provides a beautiful and relatively clean place to live. • There are a good variety of housing options and price ranges in the County. • Some types of housing and housing communities, such as cluster developments and mixed-use developments, are not widely available in the County. III -17 Chapter 3: Land Use Issues The County has a high quality of life that manifests itself in low crime, little traffic congestion, abundant natural resources and good schools. There are some areas of the County where substandard housing exists. There are not "housing maintenance or upkeep" provisions in the County zoning ordinance, County Code or Building Code. It is sometimes difficult to correct problems of this nature. Objectives A. Protect the uniqueness and special characteristics of each Roanoke County neighborhood. B. Protect the scenic beauty of Roanoke County while allowing for appropriate economic development. C. Require land development patterns that preserve open space. D. Ensure that all Roanoke County citizens have access to safe and affordable housing. E. Protect the property values of all citizens. F. Promote the use of a "liveable traffic" design model - one that values neighborhood appearance, saleability and pedestrian friendly aspects of transportation equally with ease of traffic movements. G. Provide all County residents easy access to community parks, ballfields and greenways. H. Encourage alternative modes of transportation around neighborhoods such as walking and bicycling. Implementation Strategies Continue to support the concept of neighborhood schools, recognizing the important function they play in community identity. (Obj. A) 2. Continue to foster the neighborhood councils by expanding their role and developing neighborhood specific plans. (Obj. A) 3. Research the efforts of other communities and implement programs to assist in the maintenance and upkeep of our older neighborhoods. (Obj. E) III -18 Chapter 3: Land Use Issues 4. Develop planning strategies to guide commercial development, community redevelopment and infill development while preserving neighborhood stability and property values. (Obj. A, E) 5. Revise the County zoning ordinance and subdivision ordinance to encourage, where appropriate, sidewalks and greenways throughout new residential developments and connecting neighborhoods and commercial and institutional areas. (Obj. F, G, H) 6. As we work to preserve the more rural areas of Roanoke County, revise the zoning ordinance to allow slightly higher infill development in existing neighborhoods. (Obj. A, B, C, E) 7. Continue to seek community input on all rezoning requests. (Obj. A, E) 8. Encourage community meetings for all rezoning requests. (Obj. A, E) 9. Make the necessary revisions to the zoning ordinance and subdivision ordinance to allow by right, cluster developments and mixed use developments, where appropriate. (Obj. A, B, C, E) 10. Identify substandard housing and seek solutions to alleviate these conditions. (Obj. D) 11. Research the need for housing maintenance regulations to mitigate problems with unkempt property. Develop, if necessary, appropriate regulations. (Obj. D, E) III -19 Chapter 3: Land Use Issues 4. QUALITY OF LIFE Introduction To the residents that call Roanoke County home, this is a community with a distinctive character and an abundance of natural beauty. There exists a very intrinsic relationship between the natural resources that exist here - the mountains and ridgetops, forests and streams and breathtaking scenic views - and people's perception of quality of life here in the County. In a citizen survey, conducted in early 1995, the majority of County residents said there is a high quality of life in Roanoke County and they are very interested in protecting that. For many people this quality of life manifests itself in the natural beauty and scenic resources of this area. Others appreciate the relatively low cost of living, the lack of formidable transportation and commuting problems and the high quality of public education. For whatever reasons, and there is a myriad of them ranging from low crime, good schools and scenic beauty to low cost of housing and cultural opportunities, the citizens of Roanoke County are very interested in protecting their quality of life. During the visioning process many citizens expressed concern that those things that make Roanoke County "special" could vanish all too quickly without the proper long-range planning. Without well managed growth and development, we could trade in a sense of place and authenticity for a feeling of sameness and homogenization. Steadily and perceptibly, we could lose the distinctive qualities that trigger people's desires to live here, work here and visit here. There are real and legitimate needs for jobs, tax revenues, a diversified local economy and housing opportunities. Yet there is also the recognition that we need to find more effective strategies that will enable our community to grow in ways that enhance and protect rather than degrade and threaten the quality of life that lends us distinction and character. Goal To achieve and maintain the highest possible quality of life for the citizens of Roanoke County. Issues and Opportunities The scenic beauty of Roanoke County is a major contributing factor to the high quality of life here. Other factors influencing the high quality of life include the low crime rate, relatively low cost of housing, ease of commuting and high quality public and private school systems. III -20 Chapter 3: Land Use Issues • The citizens of Roanoke County place high value on the importance of their quality of life and are very protective of it. • Many newer residents of the County have lived in other places where the quality of life may not have been as high or they experienced the degradation of that quality of life. • The economic base of the county needs to continue to grow to support an increased demand for and cost of services such as public education. • The existing rules and regulations for land development do not allow enough flexibility and creativity nor do they require site resource conservation. • Neighborhood street design standards require excessive cut, fill and tree removal. • Roanoke County has implemented a tree protection ordinance for public properties but does not have a tree protection ordinance for private lands. • The existing zoning ordinance and subdivision ordinance do not have the mechanisms to protect mountainsides and ridgelines from inappropriate development. • The School Board Blue Ribbon Committee has made extensive recommendations concerning physical facilities, which, if adequately funded, will help ensure the continuation of high-quality public schools in the County. • Roanoke County has maintained, to the extent possible, the concept of neighborhood schools. • The citizens of Roanoke County believe that the people here are basically friendly. • Roanoke County is considered a good place to retire due to factors such as cost of living. • Parks and greenways are seen as important quality of life issues. • Automobile travel, including commuting to and from work during peak hours of the work day, is relatively easy. • Parent/teacher associations enjoy a high level of participation at the elementary school level, sometimes approaching one -hundred percent. Objectives A. Preserve the scenic beauty of the County while balancing the need for economic growth. III -21 Chapter 3: Land Use Issues B. Promote the location of clean, high-technology research and development firms in the Roanoke Valley. C. Maintain the concept of neighborhood schools. D. Provide access to community parks and greenways to all citizens. E. Provide cultural and recreational opportunities to citizens of all ages. F. Promote the use of good traffic planning concepts. G. Preserve, where appropriate, existing trees and encourage the planting of tree species that are native to the Blue Ridge region. H. Encourage innovation and creativity in land development. Implementation Strategies I . Develop and adopt more stringent regulations and incentives to protect natural resources in the County - including mountainsides, ridgetops, streams, rivers, viewsheds, open space, wetlands, forests, soils and wildlife. (Obj. A, E, G, H) 2. Ensure that future growth and development is consistent with the adopted Community Plan and enhances the quality of life of Roanoke County citizens. (Obj. A, B, C, D, E, F, G, H) 3. Modify and enhance design guidelines, incorporating incentives where feasible, to be applied to all future residential, commercial and industrial developments. (Obj. A, H) 4. Continue funding and support of the greenway system and develop a dedicated source of funding to support the system. (Obj. D) 5. Fully implement the recommendations of the School Board Blue Ribbon Committee for school construction and maintenance needs. (Obj. C) 6. Revise the neighborhood street design standards to give liveability, pedestrian/bicycle and retail friendly aspects equal footing with ease of traffic movements. (Obj. F) 7. Adopt a tree protection ordinance that applies to private properties. (Obj. A, G) 8. Ensure that future commercial and industrial parks receiving financial or tax incentives from the County are built as park -like environments and include strict design guidelines, greenways and open space. (Obj. B, D, H) III -22 Chapter 3: Land Use Issues 9. Revise the subdivision ordinance to encourage the dedication of greenway easements at the time a subdivision is platted. (Obj. D) 10. Continue to support and participate in the regional land trust - a publicly -supported charitable organization providing a voluntary means to promote the preservation of natural and cultural resources - and other statewide and national land trusts. (Obj. A, E, H) 11. Continue to provide a variety of housing options in a broad range of prices. (Obj. H) 12. Through zoning ordinance revisions, allow for increased housing density, while requiring the dedication of open space. (Obj. A, D, E, H) 13. Encourage the development and re -development of lands served by public utilities while discouraging through zoning ordinance revisions the development of lands without these services. (Obj. A, H) 14. Continue to preserve the nature and stability of existing single-family neighborhoods but allow infill development, appropriately designed, at slightly higher densities. (Obj. H) 15. Continue to work cooperatively with, and provide financial support to, cultural and recreational organizations which provide invaluable opportunities to County residents. (Obj. E) 16. Expand the Roanoke County park system so that neighborhood parks are accessible to all citizens. (Obj. D, E) 17. Expand and enhance the County -wide road beautification efforts. (Obj. A, G) III -23 Chapter 3: Land Use Issues 5. REGIONALISM Introduction Roanoke County is one of several local government units that make up the Roanoke Valley. The high quality of life that Roanoke County citizens have come to expect and deserve can continue and grow only if we practice, in a proactive manner, broad-based collaboration and cooperation with neighboring jurisdictions. Roanoke County should take the lead in these endeavors. As we move into the next century, we need to begin to think of this geographic area as a cohesive unit rather than as many, often competing, parts. Many of the challenges of the twenty first century will know no geographic boundary line and will present all Valley citizens and local officials with opportunities to seek efficient and effective solutions. Critical issues such as economic development, natural resource preservation, transportation, cultural opportunities and housing require a regional perspective and regional solutions. We must find new and innovative ways to work together for the good of all. Goal To work in cooperation with all local jurisdictions to provide the highest quality services, in the most efficient and effective manner, to Roanoke County citizens. Issues and Opportunities • The formation of the New Century Council presents the opportunity to look outside our own county limits and develop a strong economic base that is competitive in the global marketplace. • A coordinated regional approach is needed to attract high-quality targeted industries. • The scenic beauty of this region is largely attributed to the mountains. Many of the significant mountain ridges and ranges extend beyond the boundaries of the County. • The Roanoke Valley has the unique opportunity to develop a world-class bikeway and greenway system that is interjurisdictional and interconnected. • The road infrastructure between the City of Roanoke and Roanoke County is very interconnected due to the "doughnut" configuration of the two localities. • The County has many intergovernmental projects with the Town of Vinton, the Cities of Roanoke and Salem, Botetourt County and other neighboring jurisdictions such as fire and rescue facilities, libraries, sewer treatment plant and the airport. III -24 Chapter 3: Land Use Issues Objectives A. Preserve the scenic beauty and natural resources of Roanoke County and the greater Roanoke Valley. B. Attract high-technology research and development firms to the Roanoke Valley. C. Promote a cooperative working relationship with neighboring jurisdictions. D. Promote communication and coordination with neighboring jurisdictions on planning issues. E. Promote Roanoke County and the greater Roanoke Valley as a tourist destination. F. Continue to participate in joint projects with neighboring jurisdictions to provide services to County citizens - such as communication facilities, libraries, fire and rescue facilities and water and sewer lines - in the most efficient manner. Implementation Strategies Fully support and participate in the New Century Council. (Obj. A, B, C, D, E, F) 2. Continue to support and participate in the Roanoke Valley Greenway Commission. (Obj. A, C, D, E) 3. Implement regional cellular tower policies to protect the region's viewsheds and mountaintops. (Obj. A, D) 4. Continue to support and participate in the Roanoke Valley Economic Development Partnership and the Industrial Development Authority. (Obj. B) 5. Continue to support and participate in the Roanoke Valley Convention and Visitors Bureau. (Obj. E) 6. Continue to notify adjoining localities when rezoning petitions impact property at the mutual boundaries. (Obj. D) 7. Continue to meet jointly with the governing bodies of adjoining jurisdictions. (Obj. C, D, F) 8. Encourage the Planning Commission to meet jointly, on an annual rotating basis, with planning commissions from adjoining jurisdictions as is currently done with City of Roanoke and the Town of Vinton. (Obj. C, D, F) III -25 Chapter 3: Land Use Issues 9. Continue to work cooperatively with the Fifth Planning District Commission on regional planning projects. (Obj. C, D, F) 10. Continue to support and participate in regional, statewide and national land trusts. (Obj. A, C, D, E) 11. Seek opportunities to work with other jurisdictions to attract high-quality, clean, research and development firms to this region. Share in the costs of infrastructure and share the generated revenue. (Obj. B) 12. Expand the Roanoke County park system so that neighborhood parks are accessible to all citizens. (Obj. A, E) 13. Expand and enhance the County -wide road beautification efforts. (Obj. A) III -26 Chapter 3: Land Use Issues 6. ECONOMIC DEVELOPMENT PLAN Introduction Economic development is a dynamic public program in Roanoke County. This activity is defined as, "the process of creating wealth through the mobilization of human, financial, capital, physical, and natural resources to generate marketable goods and services." The economic development process is of critical importance to the continued high quality of life in Roanoke County and the ability of the County to provide a high level of public services to citizens. Roanoke County's economic development mission is: "To attract and retain to the County quality jobs and investment that diversify the economy, broaden the tax base, and provide long-term employment opportunities for area residents. " Roanoke County established an economic development program in 1985 and implemented an economic development strategy to establish the initial goals and objectives for implementation. Subsequently, the Board of Supervisors re -adopted an economic development strategy in 1987 and 1989, with business plans being adopted annually thereafter. The Economic Development 5 -Year Business Plan FY 2001-2006 adopted in July of 2000 was intended to complement the Economic Development Strategy and the 1985 Comprehensive Plan. The Business Plan focused on four economic opportunity areas into which economic activity would be promoted. The emphasis was to identify potential commercial and industrial sites that could be developed and marketed by the County as "product" for economic development opportunities, and then to attract new businesses to those sites. A series of public actions, including proposed capital improvements, rezonings and coordination with VDOT primary and secondary road planning were recommended to implement the Business Plan. The Plan sets forth details of implementation activities and impact measures for the primary program areas of marketing and business recruitment, product development business retention and expansion and community/workforce development. The economic development goals and objectives are generally described below. 1. To market the County's industrial/commercial property and attract compatible business and industry to the community, and to increase the commercial and industrial tax base and related employment opportunities. 2. To encourage the retention and growth of local enterprise by creating and maintaining a positive business climate countywide. 3. To create and maintain a marketable inventory of quality industrial/commercial real property sufficient to meet market demand. III -27 Chapter 3: Land Use Issues 4. To promote and encourage regional participation in economic development activities, programs and services. Issues and Opportunities Competition among land uses for developable land: There is a limited amount of developable land in Roanoke County. Residential uses and tax-exempt activities are the major land uses competing with economic development for developable land. Potential commercial and industrial sites need to be identified, rezoned and reserved for future development. Identify economic opportunity areas: The 1992 Economic Development Strategy delineated the I-81 corridor, North County/Hollins Road, the Route 460 East Corridor, West County, Explore Park and the Southwest County/419 Corridor as economic opportunity areas. Since 1992, significant economic development activities have occurred in these areas. The following activities have occurred in the implementation of the Economic Development Strategy, and Business Plan: I-81 Corridor — Coordinate with VDOT and Community Development to evaluate the impact on economic opportunity areas and ensure the preservation, creation and enhancement of marketable commercial/industrial property. Participate in interchange design and land use and coordinate any public policy changes necessary to encourage development in these areas. North County/Hollins Road — The Hollins Road area development included the expansion of a Country Inn & Suites, a renovation of a Days Inn and the planned construction of a new Fairfield Inn. Staff continues to monitor and evaluate the interchange realignment at exit #146 for proposed I-81 development opportunities. Route 460 East Corridor — The Valley Gateway Business Park and industrial shell building showed significant activity with the sale of 42 acres to Integrity Windows for a 200,000 s.£ manufacturing facility, employing 350 people, and a project investment of $32 million. The shell building was contracted by a developer who seeks to occupy the facility with a suitable industrial tenant. Commercial development was also active with the attraction of a Wal-Mart Super Center, and a Lowe's Home Improvement Center. Staff will continue to identify and market developable property in this area to include the remaining Valley Gateway property and the Jack Smith Industrial Park. West County — Phase I development of the County owned 456 -acre Center for Research and Technology has been completed. Glenmary Drive has been reconstructed, and utility and road extensions along Corporate Circle have been implemented. Engineering design and related improvements to Phase II development have been also been completed and include a second extension of Corporate Circle, utility lines, the construction of a regional storm water management basin, lighting installation, and landscaping enhancements. Additionally, Novozymes Biologicals, a manufacturer of enzymes for agricultural products was recruited to the CRT as the first tenant in the Center. Their III -28 Chapter 3: Land Use Issues initial investment was $12 million with the creation of 25 new jobs for a research and development and administration office. Their Phase II manufacturing facility is planned for construction in 2004. Southwest County/419 corridor - New investment/construction included several commercial enterprises such as the 419 West Restaurant, Carlo's Brazilian Restaurant, Ruby Tuesday's and Fink's Jewelers. Other commercial developments occurred along Brambleton Avenue with Gold's Gym, Freddie's Sunset Grill, Blue Magnolia Restaurant and a Martin German Imports vehicle sales operation. Activity along Route 220 included a new Land Rover, Mercedes, Volvo and Jaguar dealership and the implementation of a 220 Clearbrook corridor overlay district. Maps of the Economic Opportunity Areas are included in this section. These maps include existing commercial and industrial areas and potential economic opportunity sites for future use. Economic Opportunity Areas are intended to provide for future economic development, conform to future land use designations and be an overlay on the land use maps of the Community Plan. Product development for sites and buildings: Roanoke County needs an inventory of commercial and industrial sites in order to successfully compete in economic development. The identification of potential sites is the initial step in the process of converting an undeveloped property into a "ready to go" commercial or industrial site. The Industrial Development Authority of Roanoke County implemented a rezoning study of potential commercial and industrial sites in 1995-96 and rezoned 117 acres for such uses. While many of the county's commercial and industrial properties are now zoned appropriately, they are not considered to be "ready to go sites," due to the numerous development challenges that continue to exist on these sites. The Department of Economic Development remains actively involved in the Capital Improvement Plan process by recommending specific improvement projects for funding that will create ready to go sites for development. Many of these sites will not be developed until significant capital infrastructure improvements are undertaken by the County. Historically, Roanoke County has initiated the location of publicly owned industrial parks such as Valley TechPark (177 acres) and the Roanoke County Center for Research and Technology (456 acres), and has participated as a partner in the development of Valley Pointe (52 acres in Phase I), Valley Gateway (108 aces), the Jack Smith Industrial Park (68 acres), and the Vinton Business Center (99 acres). Roanoke County also participated with The Greater Roanoke Valley Development Foundation to construct a 75,000 foot expandable shell building in Valley Gateway, and is participating with the development of Valley Pointe Phase II (180 acres). The County's role is to provide marketable commercial and industrial sites and buildings so that we can respond favorably and promptly to inquiries proposing expansions and relocations. Targeting business and industry The Roanoke Valley Economic Development Partnership markets the Roanoke Valley as a business location and serves as a point of contact for companies seeking to relocate to or expand within the Valley. The Partnership III -29 Chapter 3: Land Use Issues has targeted automotive and transportation related, wireless communications, printing, biosciences/life sciences, medical devices, large office and corporate headquarters. Roanoke County concurs with this list and adds large commercial projects and technology based companies that pay salaries and wages in excess of the median wage rate for the region. Using Quality measures to evaluate economic development opportunities: The series of community workshops held in the planning areas of the County confirmed that the quality of economic development is important to the citizens. If Roanoke County desires to continue to take advantage of its' premier location for retail, commercial and industrial growth which expands the tax base and creates new economic opportunity for it's citizens, then it must be accepted that land uses and zoning designations must logically change over time to accommodate this activity. It is however vitally important to consider the appearance of the proposed projects and the impacts on the local community when considering new projects in areas adjacent to existing residential areas. Economic considerations should not be the determining criteria for evaluating land use, rather it should be one of many factors considered as the County goes through its natural progression of economic growth. Roanoke County has a history of protecting the rights of its citizens and our natural resources that make this area a destination for families and businesses as evidenced by the following projects. Roanoke County pursued a design "charette" with the citizens residing adjacent to both the Vinton Business Center and the Roanoke County Center for Research and Technology. This process has resulted in a Master Plan that the County and Town recently qualified by hiring a marketing firm to review the economic feasibility of the various land uses proposed in the Master Plan. Retention of natural vegetation, site and building design criteria, open space preservation and the adoption of protective and restrictive covenants are some of the quality measures adopted in the Master Plan process which will not be compromised as development occurs. Assisting economic development through its public private partnerships: Roanoke County has adopted a public-private partnership policy to assist businesses with expansion and relocation opportunities. The policy was revised and adopted by the Board of Supervisors in 2002, which expanded the flexibility of the program to allow for incentives to be offered for retail businesses that provide significant revenue for Roanoke County. This action signifies the value of retail business operations and their positive impact on the County. Funds are annually appropriated to an economic development fund and administered for projects in accordance with the policy, which gives staff the ability to offer incentives to targeted businesses. The County will consider financing eligible public improvements and employee training costs as a partnership if there is a "payback" or return on investment from new taxes/fees generated by a commercial or industrial project. Typical partnerships involve extensions of water and sewer service and related utility connection fees. All projects are subject to the execution of a performance agreement between the County and the private entity to insure that a proposed development meets its investment goals. Partnership agreements are audited by the County staff to determine if the projected taxes and fees are being generated by a partnership project. III -30 Chapter 3: Land Use Issues Business Retention & Expansion: Roanoke County carries out an ongoing existing business visitation program to companies located within the County. These visits provide a confidential update of a company's products, markets, operations and growth potential. The goal is to retain and facilitate expanded investment and employment within Roanoke County. Existing businesses are eligible for public-private partnership assistance. The Economic Development staff also coordinates district roundtables, hosts a Business Partners TV show, and publishes a business newsletter. Coordination with other County offices and State and Federal agencies to address issues raised by existing businesses is also a function of this program. Redevelopment Efforts: Roanoke County encourages redevelopment through a broad based community development approach that includes citizens, business and the County as partners. The County recognizes that redevelopment efforts should be primarily private sector driven, but is often approached with the involvement of both the public and private sectors. For example, Tanglewood Mall is in a state of decline due to high vacancy rates, and County staff is partnering with the mall management to offer assistance in attracting quality retailers as tenants. County Staff is also assisting the Town of Vinton with revitalization efforts for their downtown area, and continues to support the marketing and development of the Vinton Business Center. Staff will also be participating in Vinton's comprehensive planning process in 2003. Redevelopment efforts for the 460 corridor in West Salem have been delayed due to VDOT's postponing of a significant road widening project in this area. Delays have occurred due to funding considerations, and staff is prepared to assist with this project once funding is restored, and the project is renewed. The Dixie Caverns interchange at Exit #132 off of I-81 and the Hollins Exit #146 are also areas concentration for future development opportunities. Staff will continue to monitor and evaluate the land uses in these areas, and the corridor study to implement a work plan for future development/redevelopment initiatives. In many County redevelopment efforts, public monies are used to leverage private funds for property improvement and development. County staff serves as a partner and a facilitator in these projects, assisting all parties with accomplishing their goals. Assisting business startups, small business development and Workforce training: The Economic Development staff has many contacts in both the public and private sectors. The Commonwealth of Virginia, the Department of Business Assistance (DBA), the Service Corps of Retired Executives (SCORE), the New Century Venture Center, regional agencies (such as TAP), local colleges and universities and the regional Small Business Development Center (SBDC) are available to assist citizens seeking to start a business. County staff offers referrals to these resources, which contributes to the growth of new businesses in Roanoke County. III -31 Chapter 3: Land Use Issues Objectives A. Strengthen existing business retention efforts and assist companies with expansion opportunities within Roanoke County. B. Attract new industry to the County that will enhance and diversify the industrial base. C. Identify potential commercial and industrial sites and pursue opportunities to add these properties to the "product" inventory of the County. D. Increase public awareness of business activities and their role in the economic base of Roanoke County. E. Identify areas for community development projects that will allow the citizens, businesses and County to jointly improve a geographic area. F. Identify potential public-private partnerships that will enhance economic development in Roanoke County. G. Evaluate and regulate the appearance of new commercial and industrial development, especially those developments adjacent to existing residential neighborhoods. Implementation Strategies Implement the economic development program areas described in the Economic Development Business Plan including Business Retention and Expansion, Business Attraction, Product Development and Regional Cooperation. (Obj. A, B, C, D, E, F) 2. Implement all three development phases of the Roanoke County Center for Research and Technology. (Obj. B, C, F) 3. Identify sites and opportunities for future business park development. (Obj. C, E) 4. Continue to monitor the I-81 Widening Project and the I-73 development process for economic opportunities. (Obj. C, E) 5. Redevelop the West Main Street (Route 460) corridor. (Obj. A, D, E, F) 6. Continue the land acquisition program to identify, reserve and rezone Economic Opportunity Areas for future development needs. (Obj. C) 7. Development of regional publicly owned business parks. (Obj. A, B, C, D, F) 8. Develop design guidelines for new commercial retail developments including "big box" retail structures, traditional shopping centers and the newer "life style"centers. Develop design guidelines for new industrial projects on a case -by- case basis taking into consideration the III -32 Chapter 3: Land Use Issues location of existing residential developments and valuable natural resources such as the Blue Ridge Parkway viewshed. The appropriateness of the design and the extent to which the developer is sensitive to the above mentioned items will be used as criteria when considering the use of financial incentives to spur development. The following Economic Opportunity Area maps include existing commercial and industrial areas and potential economic opportunity sites for future use. The blue areas identified on these maps as "Other" are areas that have not been specifically identified at this time as future commercial or industrial areas. They are areas where, based upon their location, access or topography, some potential for future economic opportunity exists. III -33 Chapter 3: Land Use Issues Economic Opportunity Area Map - North County 46 III -34 - ... t �...�+.j iry 764 746 Bennett '1fi ,, i y l�iOS ,5 912 Co ve. 664 7A0 �aifi 1Y'°�fi. College o a 0 7 � �? Z 404 626 l 81 r 23 11 116 6 / 400` hon;;i-g .� 0 Rick 628 118 d Q.�6 Legend 760 629 Ro olce f C 220 Airpa ■ Industrial 101 f t A 0 w p Other 115 a � o N Q k 01 rt wo o a � No Scale Date: September 30, 1998 a Ca w 46 III -34 Back of map III -35 Chapter 3: Land Use Issues Chapter 3: Land Use Issues Economic Opportunity Area Map - East County J J Via° CU CU Ra ohe 626 22 Rl�po 01 �' 809 b` k 5 Q5 ti r� Q- 116 llfi 22 Knob p m 581 11 nuo Yd �\J J7 O C1 221 O :60 U (0� iF'k f Q9� _�CI` Stewarts vtlfe q 24 LCgencl ; 6 `� °J Commercial Industrial. 118 i' a ❑ oar �r 616 M m p, 0 omc� Na Scale Date: September 30, 1998 Q III -36 Back of map III -37 Chapter 3: Land Use Issues Chapter 3: Land Use Issues Economic Opportunity Area Map - South County III -3 8 Back of map III -39 Chapter 3: Land Use Issues Chapter 3: Land Use Issues Economic Opportunity Area Map - West County III -40 642 t12 Itcgloaal Landfill 646 auo 689 � 2 7�lenvo- 64 p ii Q 1 49 rN�i e ° o� O'clock r ffi7ob nob p B1 W t Lanq li idge 694 Legend C0171171eTC]al 9prin ollo ' t 612 a v .. � Re� v it � P. ~ 0 Other 603 amp r U FI � O U C ro 0 0 O No Scale Date: September 30, 199$ 0 O N U X r� W III -40 Back of map III -41 Chapter 3: Land Use Issues Chapter 3: Land Use Issues 7. GROWTH MANAGEMENT & CAPITAL FACILITIES PLANNING GOAL: To protect, preserve, enhance and effectively and efficiently utilize Roanoke County resources by: • Guiding future growth and development to areas where land uses, facilities and infrastructure exist and are planned • Promoting compact and contiguous development and infill development • Focusing County infrastructure funding on these current and designated future development areas • Protecting and enhancing the following resources: historic, cultural, agricultural, forestry, water, recreational and scenic. INTRODUCTION The growth management goal is to direct development into designated areas that have or will have the capacity to accommodate future growth. This goal will facilitate efficient service delivery in those areas while preserving rural resources in outlying areas. To further this goal, the County land use map should delineate three areas of growth potential: 1) the primary growth areas of the County that are currently served by public water and sewer and where the majority of new growth should be encouraged; 2) the "future growth" areas directly adjacent to the primary growth area that should accommodate outward growth over a 5 -year period of time and where the extension of public water and sewer can relatively efficiently be accomplished; 3) the rural areas where growth should be discouraged and public water and sewer services should not be extended. It must be recognized that the future growth areas should be periodically reviewed and updated. While it is the goal of Roanoke County to focus new development in those areas that currently have existing infrastructure and services it is recognized that some level of outward growth is necessary. To accommodate this outward growth in a manner that does not diminish the quality of life of current residents of these areas, the timing of new developments must be carefully orchestrated to coincide with the construction of public facilities and services to meet the needs of current and future citizens. The growth management goal is clearly intended to discourage development in the rural areas of Roanoke County and recognizes that incompatible development in these areas of the County is costly both in terms of service delivery and the irreversible damage to critical resources. In order to implement the growth management goals it should be recognized that the provision of adequate public infrastructure and services to those areas designated to receive growth is a critical component. The growth management goals of Roanoke III -42 Chapter 3: Land Use Issues County can only be achieved if needed capital facilities improvements are timed and coordinated to accommodate future growth. Conversely, it must be recognized that the inefficiencies of providing these same public services to dispersed rural populations is not in the overall public interest. The provision of public facilities and services requires significant public funding for construction, operation and long-term maintenance. The County should ensure that the highest benefit is provided to County citizens in exchange for this cost. In order to achieve the stated growth management goals, future emphasis should be placed on providing public service delivery to those designated growth areas where future development should be directed. To accomplish this, public facilities and services should be provided at a much higher level in these growth areas than in the non -growth or rural areas. LAND USE RECOMMENDATIONS FOR DESIGNATED GROWTH AREAS Primary designated growth areas - those areas currently served by public water and sewer and where the majority of new growth should be encouraged - include the following land use designations: Principal Industrial, Core, Transition, Development., Neighborhood Conservation, Economic Opportunity, Suburban Village, University, Glenvar Village and Mixed Use. Future designated growth areas — those areas adjacent to primary growth areas where outward growth over the next 5 years should be accommodated — include the following land use designations: Development and to a limited extent Village Center. These primary and future designated growth areas are consistent with the intent of Commonwealth of Virginia Code 15.2-2223.1, which describes urban development areas in local comprehensive plans. A map of Designated Growth Areas in Roanoke County is shown on page III -49. These designated growth areas must be attractive places to live and work. Development in these areas should be more efficient and at higher densities than in the past in order to help prevent sprawl development and keep suburban development patterns from encroaching into rural areas. The continuation of low-density suburban areas should not be encouraged in designated growth areas. Design strategies should be developed to ensure that these designated growth areas are harmonious with surrounding areas but may include different uses and different densities than those surrounding areas. Careful design of these designated growth areas should result in development that is beneficial to the community. 1. The majority of new residential growth in the County should be in designated primary and future growth areas. 2. Development within the growth areas should have public water and sewer. III -43 Chapter 3: Land Use Issues Rezoning of property within these designated primary and future growth areas should consider and address the impacts on public facilities and services that would result from the rezoning. 4. The residential growth areas should be developed at densities that allow efficient use of the land. Gross densities should be increased. Design of residential growth areas should reflect the following principles: a. Transportation — Neighborhood streets (both public and private) should be of a scale that complements the area, should incorporate landscaping and should encourage walking and biking. Private streets, and public streets in accordance with VDOT guidelines, should be designed to calm traffic. Sidewalks and paths should be provided for pedestrians. b. Parks and Open Space — To compensate for increased residential densities parks and open space should be incorporated into the design. Environmental resources such as floodplains, slopes and forested areas should be protected. 6. Steep slopes — New development, infill development and redevelopment on slopes between 10% and 33% should be sensitive to existing grades and where possible should promote architectural design elements that work with, rather than against, these grades. Develop design guidelines and regulations for development on steep slopes. These should include provisions for "slope maintenance bonds", and should determine a slope above which development should not be allowed. The precise slope percentage should be determined after more research and analysis is conducted but should be specified in the future zoning ordinance amendment. 7. Infill development — new development on vacant lots within urbanized/suburbanized areas - should be encouraged. Design guidelines should be developed to: a. allow flexibility in housing location, type and density; b. provide flexibility in lot size, configuration, and vehicle access to facilitate infill development; c. provide clear development standards that promote compatibility between new and existing development; d. encourage development of needed housing in close proximity to employment and services; e. promote neighborhood preservation and enhancement through redevelopment of underutilized properties; f. encourage mixed use development to complete neighborhoods and provide housing close to jobs and commerce; A policy that considers encouraging infill development should address accessory III -44 Chapter 3: Land Use Issues dwellings, flag lots, shared driveway policies, frontage requirements, setbacks and parking requirements. 8. Public improvements, needed to support and encourage infill development, should be scheduled in a timely fashion in order to be incorporated into new developments. 9. Neighborhood Commercial Centers — Properties suitable for low to moderate intensity retail sales and services — along collector and arterial roads — should be inventoried and rezoned to Neighborhood Commercial. Small, neighborhood commercial areas should be developed to enhance the residential development and should connect to the residential area. Mixed uses — shops, offices, civic and cultural spaces — should be encouraged. Densities should be increased by encouraging the mix of residential uses, office uses and retail uses. The current Neighborhood Commercial District standards should be modified as follows: a) Total District Size: increase from current maximum of 3 acres b) Permitted Uses: expand commercial uses allowed (retail) and consider including limited residential c) Strengthen use and design standards including site development, lighting, landscaping, signage and maximum square footage requirements d) Revise minimum parking requirements and establish maximum parking requirements in the District; revise shared parking limitations e) Encourage public uses within this District such as public branch libraries, police sub -stations, etc. In addition, the Community Plan should address the issue of allowing higher - density residential in the immediate neighborhoods surrounding these identified Neighborhood Commercial Districts. 10. Commercial development should encourage vehicular and pedestrian connections to nearby neighborhoods and should avoid strip, linear designs. 11. Revise the Cluster Development ordinance. Address the following sections: a. Street and Access Requirements including: 1) length of private streets; 2) number of dwelling units allowed on any single private street; and 3) private street design requirements. b. Conservation Areas, Primary and Secondary: review and clarify definitions including section relating to slope. C. Open Space Requirements and the relationship to lots and property lines. 12. In compliance with the ozone Early Action Plan, Roanoke County should adopt a III -45 Chapter 3: Land Use Issues 40% tree canopy coverage (calculated at ultimate growth of trees) as a target for all new development. Encourage developers to site structures and parking lots around stands of mature trees and where needed, require the replacement of trees. Recognize the important role trees lay in air quality, aesthetics and cooling. 13. Develop corridor studies for future commercial areas including Route 220 South, Route 221 and Route 460 west. LAND USE RECOMMENDATIONS FOR RURAL AREAS Rural growth areas — those areas where growth should be discouraged — include the following land use designations: Rural Village, Rural Preserve, Conservation and to some extent Village Center. Roanoke County should make a commitment to preserve its rural areas. Without this, we will see the continued fragmentation of large parcels of land and the conversion to residential development. This pattern results in a declining agricultural economy, the loss of plant and wildlife habitats, and the loss of natural resources and the rural character of much of Roanoke County. The subdivision of rural lands for single-family residences has serious implications for resource conservation and the preservation of the rural character. The outlying more rural areas of Roanoke County are currently zoned to allow minimum lot sizes of 1-3 acres. These lot sizes are not conducive or sufficient for viable agricultural, forestry or conservation land uses. The only thing these small lot sizes do is encourage the steady spread of a basically suburban land pattern and character in historically rural areas. The consequence is the irreversible loss of rural lands and the loss of natural, scenic and historic landscapes. In addition, rural residential land development requires increased delivery of public services. To be consistent with the growth management goals of Roanoke County, the policies that allow the continued development and fragmentation of rural lands should be changed. It should be recognized that the most effective tools for protecting rural lands are those that discourage development from occurring in the first place and provide permanent protection of the land. Any land use regulations that allow residential development in the rural areas, even at much less density, will reduce fragmentation and density impacts but not eliminate them. Having said that, the goal is not to eliminate all residential development in the rural areas of Roanoke County but to recognize the impacts this development pattern has and to address the location, character and extent of this development in order to minimize the harmful impacts. The following policies are recommended: 1. Encourage land protection and conservation in rural areas. Recognize that tools such as conservation easements are the most cost-effective solution to protecting rural lands. III -46 Chapter 3: Land Use Issues 2. Decrease residential density in rural areas. Revise the AR, AG -1 and AG -3 zoning district site development regulations to address the issue of lot averaging and the concerns of land fragmentation and density related impacts. 3. Permit and or require clustering of rural residential development for subdivisions of 5 lots or greater. This should encourage a more efficient land development pattern and retain all the development potential that would be available under a conventional development standard. The benefits of this program to the landowner are reduced development costs, more marketable lots, and the preservation of substantial portions of land. Citizens would gain the benefits of permanent preservation of large tracts of land that could be used for agricultural or forestry uses, recreational uses and the preservation of water, natural or scenic resources. Many issues need to be considered in developing standards for a rural cluster program. The protection of the natural environment should be ensured. A minimum size of the preservation parcel should be determined. The standards should ensure that a minimum amount of land is used for residential development. With that though, and in keeping with the growth management goals of Roanoke County, the use of rural cluster developments should not be a justification to extend public water and sewer to these rural areas. In order for this program to work, alternatives for wastewater treatment and water supply should be considered that would allow reduced lot sizes for the residential parcels and, thereby, allowing significant portions of land to be available as preservation parcels. 4. Proactively manage the extension of water and sewer services. Recognize that the availability of public water and sewer, among other things, greatly influences the development and density of land. Sewer pump stations have made the extension of public sewer feasible to areas of the County where it would not otherwise be. Staff has mapped recommended "future growth" areas, contiguous to the current utility services boundary, that should accommodate growth over the next 5 year period of time. Within this future growth area Section 15.2-2232 public review will not be required for the extension of water and sewer services. Outside and beyond these future growth areas, staff is recommending that no new utility lines be extended, no new pump stations be built and no new community well systems be allowed without the benefit of a Section 15.2-2232 public review. 5. Consider adopting a set of design guidelines and recommendations for future improvements to rural roads. Also, consider adopting the Virginia Department of Transportation Rural Rustic Roads Program. This program for unpaved roads is designed to pave rural roads in a more environmentally friendly and less costly manner. This program uses existing road widths for road improvements, rather than increasing road widths and is designed for areas with limited growth. 6. Consider minimum private road development standards for very large lot rural residential development. Shared driveways, flag lots or lots with no frontage should also be considered to minimize the amount of road frontage required and III -47 Chapter 3: Land Use Issues the visual impact of residential development from the rural roads. These standards should apply to five or fewer lots. 7. Protect steep slopes and ridgelines. Develop design guidelines and regulations for development on steep slopes. These should include provisions for "slope maintenance bonds", and should determine a slope above which development should not be allowed. The precise slope percentage should be determined after more research and analysis is conducted but should be specified in the future zoning ordinance amendment. 8. Develop and implement a Mountain Zoning District. This proposed district should prohibit multi -family residential, commercial and industrial development within the district and provide limitations on clearing, grading, building height and distance from ridgeline for all other development. Specifics of this ordinance should be researched and analyzed after the adoption of the Community Plan. 9. Develop design standards for Rural Village Centers. Review the areas currently designated as Village Centers and, with community input, determine which should stay on the list, which should be removed and if new areas should be added. There may be areas that are currently designated Rural Village Centers that, given growth patterns, may be better suited as Development and rezoned to Neighborhood Commercial. In these cases, consideration should be given to the extension of public water and sewer to these areas. Rural Village Centers are rural locations where you would find small country stores, small family restaurants, schools, post offices and churches — those establishments that bring a sense of community to the surrounding countryside. These areas are not intended to be major employment centers for urban/suburban residents but rather to provide essential goods and services to the nearby rural residential community. These areas are often the rural crossroads. Design standards should consider the following: prohibit the creation of strip development along rural roads; appropriate scale of buildings; the re -use and renovation of existing buildings should be encouraged. Overall, rural design standards should be implemented not suburban design standards. It should be recognized that these rural village areas do not require the same signage, access, parking and lighting standards that more suburban and urban areas do. 10. Develop an ordinance to prohibit the clear -cutting of trees in certain zoning districts, under certain circumstances. Attention should be given to the provisions of State Code dealing with silviculture activities. III -48 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION APPROVING AND ADOPTING AN AMENDMENT TO THE COMPREHENSIVE PLAN FOR ROANOKE COUNTY, VIRGINIA IDENTIFYING DESIGNATED GROWTH AREAS WHEREAS, on September 1, 2015, the Planning Commission held a public hearing on an amendment to the Comprehensive Plan identifying designated growth areas, after advertisement and notice as required by Section 15.2-2204 of the Code of Virginia, and on September 1, 2015, adopted a resolution recommending that the Board of Supervisors review and adopt a revised Comprehensive Plan for Roanoke County; and WHEREAS, on September 22, 2015, the Board of Supervisors held a public hearing on an amendment to the Comprehensive Plan identifying designated growth areas , after advertisement and notice as required by Section 15.2-2204 of the Code of Virginia; and WHEREAS, Roanoke County, Virginia, has a long and successful history of community planning that has emphasized citizen involvement and participation; and WHEREAS, Section 15.2-2223 of the Code of Virginia requires that the Planning Commission of every jurisdiction shall prepare and recommend a comprehensive plan for the physical development of their jurisdiction; and WHEREAS, the Planning Commission has reviewed and recommended an amendment to the Comprehensive Plan for Roanoke County identifying designated growth areas and adding State code references to satisfy criteria for transportation project funding and said plan has been prepared in accordance with Sections 15.2- 2223, 2224, and 2229 of the Code of Virginia; and Page 1 of 2 NOW, THEREFORE, BE IT RESOLVED by the Board of Supervisors of Roanoke County, Virginia as follows: 1. That the Comprehensive Plan is hereby amended by identifying designated growth areas on existing maps, text and land use designations and adding State code references in order to satisfy criteria for transportation project funding. 2. That this resolution is effective from and after September 22, 2015. Page 2 of 2 ACTION NO. ITEM NO. E-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution requesting the Virginia Department of Transportation to restrict through trucks on Route 758 (Carson Road), Vinton Magisterial District SUBMITTED BY: David Holladay Planning Administrator APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The Virginia Department of Transportation (VDOT) reviewed a citizen request to restrict through truck traffic on Route 758 (Carson Road). VDOT traffic engineering review found that the section of roadway was narrow and the curves would require large trucks to use portions of the adjacent travel lanes. A good portion of the road is residential in nature. Carson Road crosses into Roanoke City, and becomes Belle Avenue until the intersection with King Street. VDOT traffic engineering review found that the City of Roanoke already restricts through truck traffic on Belle Avenue, as well as King Street. In order to be consistent and support the existing through truck restriction, VDOT suggests that the Board of Supervisors consider a through truck restriction on Carson Road. The process to restrict through trucks on a secondary street requires that the local governing body hold a public hearing and adopt a resolution formally requesting that VDOT place this restriction on a given section of roadway. Once the public hearing has been held and the resolution adopted, the request is forwarded to the local Resident Page 1 of 2 Administrator who forwards the request along with supporting documentation to the State Mobility Management Engineer. The State Mobility Management Engineer makes a recommendation to the Commissioner of VDOT for consideration. The Commonwealth Transportation Board delegates the authority to restrict through trucks on secondary highways to the Commissioner. There are several key criteria that VDOT considers prior to approving any proposed restriction: 1. A reasonable alternative route is provided. 2. Character/frequency of the truck traffic on the route is not compatible with the affected area. 3. Roadway is residential in nature. 4. Roadway must be functionally classified as either local or collector. The failure to satisfy both criteria one and two, and either three or four will result in the request being denied. Local truck traffic, such as for deliveries or someone who resides on this route, are not affected by the designation, however, all other through trucks would be required to use the selected alternate route. The through truck restriction is proposed for Route 758 (Carson Road) beginning at the intersection of US Route 221 / 460 (Challenger Avenue) and ending at the City of Roanoke corporate limits at Belle Avenue, with the termini to termini distance equaling approximately 1.07 miles. The alternate route proposed is US Route 221/ 460 (Challenger Avenue) beginning at the intersection of Route 758 (Carson Road), then traveling west on US Route 221/460 to Gus W. Nicks Boulevard, then traveling east on Gus W. Nicks Boulevard, and ending at the intersection of King Street in the City of Roanoke, with the termini to termini distance equaling approximately 2.95 miles. (See attached map.) FISCAL IMPACT: None ALTERNATIVES: 1. Adopt the attached resolution 2. Do not adopt the attached resolution STAFF RECOMMENDATION: Staff recommends alternative #1 Page 2 of 2 Z O Gc a W U Y Ib .0 O N Z a 'ray,,? a�rei, F- ell l -j LL O 0 a U W .-. s W 0 .y Ja W LL cn Q Lu„o LU 0 �Q � } W D r� U H T y D 0 0 > N Lu 0 F- < a LLZ O W U 0 (D v1 Y ZO GC H W U 00 ZW i H CG 0 L ti a H Z J _ 'z ^'9 .y U Z N = LLJ D a W $• = W W r� ' N r 0 U- a ' • W J 00 o WLU Ul) Z �y � C C W Qs s W W0 CA CA Y a N aaZ Y F-f O GOC GOC O =Og \ Z a a GC GC a tIf �4 N D: W LL N Y _U Z N C7 A %C011nt of Roanoke z raa DEPARTMENT OF COMMUNITY DEVELOPMENT BUILDING PERMITS/ INSPECTIONS DIRECTOR, ARNOLD COVEY DEVELOPMENT REVIEW DEPUTY DIRECTOR OF DEVELOPMENT SERVICES, TAREK MONEIR ENGINEERING DEPUTY DIRECTOR OF PLANNING, PHILIP THOMPSON ENVIRONMENTAL MANAGEMENT PLANNING & ZONING TRANSPORTATION September 14, 2015 PUBLIC NOTICE - PLEASE READ The Roanoke County Board of Supervisors is considering a through truck restriction on Carson Road. The restriction would not apply to pickup or panel trucks. The restriction would also not apply to trucks with a delivery or destination on Carson Road. The Roanoke County Board of Supervisors will hold a public hearing on this request on the following date, time and location: Tuesday, September 22, 2015 at 3:00 p.m. Roanoke County Administration Center, Board Meeting Room 5204 Bernard Drive, Roanoke, Virginia The through truck restriction is proposed for Route 758 (Carson Road) beginning at the intersection of US Route 221 / 460 (Challenger Avenue) and ending at the City of Roanoke corporate limits at Belle Avenue, with the termini to termini distance equaling approximately 1.07 miles. The alternate route proposed is US Route 221/ 460 (Challenger Avenue) beginning at the intersection of Route 758 (Carson Road), then traveling west on US Route 221/460 to Gus W. flicks Boulevard, then traveling east on Gus W. Nicks Boulevard, and ending at the intersection of King Street in the City of Roanoke, with the termini to termini distance equaling approximately 2.95 miles. (see map on reverse) Additional information on this request may be obtained by contacting the Department of Community Development at (540) 772-2068 ext 227. Sincerely, David Holladay Planning Administrator P.O. BOX 29800 - ROANOKE, VIRGINIA 24018 - PHONE (540) 772-2080 * FAX (540) 776-7155 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON SEPTEMBER 22, 2015 RESOLUTION REQUESTING THE VIRGINIA DEPARTMENT OF TRANSPORTATION TO RESTRICT THROUGH TRUCKS ON ROUTE 758 (CARSON ROAD), VINTON MAGISTERIAL DISTRICT WHEREAS, the Roanoke County Board of Supervisors have studied the possibility of placing a through truck restriction on Route 758 (Carson Road); and WHEREAS, the through truck restriction is proposed on Route 758 (Carson Road), beginning at the intersection of US Route 221 / 460 (Challenger Avenue) and ending at the City of Roanoke corporate limits at Belle Avenue, with the termini to termini distance equaling approximately 1.07 miles; and WHEREAS, the alternate route proposed is US Route 221/460 (Challenger Avenue) beginning at the intersection of Route 758 (Carson Road), then traveling west on US Route 221/460 to Gus W. Nicks Boulevard, then traveling east on Gus W. Nicks Boulevard, and ending at the intersection of King Street in the City of Roanoke, with the termini to termini distance equaling approximately 2.95 miles; and WHEREAS, the alternate route has been found to be reasonable; and WHEREAS, a public hearing was held on September 22, 2015, according to Section 46.2-809 of the Code of Virginia, 1950, as amended. NOW, THEREFORE, BE IT RESOLVED that the Board of Supervisors requests the Virginia Department of Transportation to restrict through trucks on Route 758 (Carson Road) beginning at the intersection of US Route 221/460 (Challenger Avenue), and ending at the City of Roanoke corporate limits at Belle Avenue, with the termini to termini distance equaling approximately 1.07 miles; Page 1 of 2 BE IT FURTHER RESOLVED, that the County will use its offices for enforcement of the proposed restriction in Roanoke County. Page 2 of 2 ACTION NO. ITEM NO. F-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance authorizing the lease of space in the Vinton Library to Natures Cool Coffee d/b/a Land of a Thousand Hills Coffee Company for the operation of a coffee shop SUBMITTED BY: Richard Caywood Assistant County Administrator APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Approval of this ordinance would authorize execution of a lease for a coffee shop at the Vinton library. Key terms of the lease are as follows: 1. Five (5) year initial term 2. Two (2) three (3) year renewals are possible through mutual agreement 3. Rent is five percent (5%) of gross receipts with the first six (6) months' rent abated to help offset startup costs 4. Street oriented vending is permitted from the parking lot (with appropriate permission from the town of Vinton) to allow the coffee shop to sell during town festivals The selection of the vendor was made through an open, competitive process. The vendor currently operates a storefront coffee shop at the Daleville Town Center in Botetourt County. Page 1 of 2 FISCAL IMPACT: This action has no fiscal impact other than the receipt of rental income. The County has an existing coffee shop lease at the South County Library. For fiscal year 2014 the County received $3,494.61 in rent. For fiscal year 2015, the County received $5,649.94. STAFF RECOMMENDATION: Staff recommends approval of this action. Page 2 of 2 LEASE AGREEMENT BETWEEN THE COUNTY OF ROANOKE AND NATURE'S COOL COFFEE d/b/a LAND OF A THOUSAND HILLS COFFEE COMPANY LEASE AGREEMENT THIS LEASE AGREEMENT, made and entered into this day of , 2015, by and between the COUNTY OF ROANOKE, VIRGINIA, a political subdivision of the Commonwealth of Virginia ("County"), and NATURE'S COOL COFFEE d/b/a LAND OF A THOUSAND HILLS COFFEE COMPANY ("Tenant"); and WHEREAS, the County owns certain property located at 300 Pollard Avenue, Vinton, Virginia 24179 commonly referred to as the Vinton Library; and WHEREAS, the County desires to lease space for a coffee shop, to serve its citizens and the public at large, located within the Library and has negotiated a lease with the Tenant. NOW THEREFORE, IN CONSIDERATION of the recitals and mutual covenants contained herein, the parties hereto agree as follows: 1. Leased Premises. The County hereby leases to Tenant, subject to and upon the terms and conditions hereinafter set forth, those certain premises on the 1St Floor of the Vinton Library consisting of square feet for a coffee shop, in those rooms designated as 205(A) and 205(B), being for joint use shown on the attached drawing and/or sketch made a part of the Lease Agreement as "Exhibit A." 2. County's Warranties. County represents and warrants that County is the sole owner in fee simple of the Leased Premises and has full right and power to grant the estate demised and to execute and perform this Lease. Page 1 of 19 3. Term of Lease. Tenant shall have and hold the Leased Premises for a term of five (5) years with two additional three (3) year terms, which additional terms subject to mutual agreement. The original five year term shall begin on November 16, 2015, and expire on November 15, 2020. Tenant shall have the right to renew for the additional terms by providing written notice to the County no later than ninety (90) days before the expiration of the initial term, or the first of the two additional terms. The County and Tenant shall then agree to mutually acceptable terms before sixty (60) days of the current expiration date with a resulting negotiated Agreement of Terms. If no acceptable Agreement of Terms is reached between the parties, then the expiration date is final. 4. County's and Tenant's Representations. (A) County shall provide the space identified in Exhibit A constructed for Tenant's purposes. The extent of the construction shall be outlined in "Exhibit B." "Exhibit B" shall be an "as built" drawing/sketch showing the specific condition at which the space shall be turned over to the Tenant for lease. "Exhibit C" shall be a list of equipment which shall be purchased by County but provided for exclusive use, maintenance, repair, and upkeep by Tenant. If equipment necessitates replacement during the life of the Lease, then County may require Tenant to contribute to up to half of the replacement cost. The items in "Exhibit C" shall remain with the County upon the final expiration of a term. Page 2 of 19 (B) Tenant shall be responsible for obtaining any and all necessary permits to operate the coffee shop. These permits shall include any permits required by the health department or other related permits to operating a food service business. (C) County hereby agrees to make all structural repairs to the Leased Premises as necessary. Structural repairs are defined as repairs which include but are not limited to repairs to the roof, electrical wiring, heating and air conditioning systems, water, water pipes, toilet, gas, plumbing, other electrical fixtures and the exterior and interior walls. The County further agrees to maintain at its expense all exterior areas including parking areas, driveways, pavement and sidewalks, including the provision of exterior lighting, grass cutting and trimming and timely snow and ice removal. (D) Tenant, at its sole cost and expense, notwithstanding County's obligation for structural repairs, shall keep and maintain the Leased Premises in good repair, condition and appearance during the term of this Lease, ordinary wear and tear accepted, and not operate any part of the Leased Premises in a negligent manner. Tenant acknowledges and agrees to make any and all non-structural repairs to the Leased Premises and its personal property at its sole expense; provide that Tenant shall make all non-structural changes of every kind or nature which may be required to be made for any reason in connection with Tenant's use of the Leased Page 3 of 19 Premises, only after Tenant received written approval by County if such changes might cause a disruption to the library setting. (E) Tenant shall not make any material alterations of, additions to or changes in the Leased Premises or equipment without the prior written approval of County, which approval shall not be unreasonably withheld. (F) County shall furnish electricity, plumbing, water, sewer, fire suppression, heating, and air conditioning services for the Leased Premises as those services are supplied to areas of the building. The County represents that such services shall comply with all applicable laws and regulations. Tenant hereby agrees to provide its own janitorial services and those services required to maintain its own personal property, at its sole expense. However, unless due to the negligence of the County, its agents, representatives or employees, Tenant agrees that County shall not be liable to Tenant for any damage to Tenant or Tenant's business resulting in whole or in part from any lack of utilities. The County will provide one yard dumpster and it is expected that it will be either emptied or replaced one time each week. In the event Tenant's usage requires additional dumpster services, Tenant will pay its pro -rata share of the additional charges caused by its portion of its additional usage. Tenant shall promptly notify the County in writing of any repairs it believes need to be made to the Leased Premises, and the County shall make repairs to the Leased Premises as it deems necessary. Page 4 of 19 (G) Tenant shall be solely responsible for and pay all telephone, data, other communications lines and wireless communications equipment and services which may be desired by Tenant. Specific plans for the installation or repair of any wireless service, computer service and telephone service, including wiring, which might affect the Vinton Library's structure, electrical wiring or systems, or computer or wireless systems, must be approved by the County prior to said installation or repair. Such installations and any subsequent repairs shall be at Tenant's sole cost and expense. (H)Tenant agrees that all signage shall be approved by County at County's sole and exclusive discretion. All permanent alterations, changes and improvements to the structure made by County shall become the property of the County. Nothing contained in this paragraph shall be construed as requiring County to make any repairs or replacements, including to equipment, except structural repairs, as specified above. (1) Tenant agrees to conduct itself, at all times, in a first-class, professional, and businesslike manner, with integrity consistent with reputable business standards and practices, to provide prompt, efficient, and courteous services to customers of the Leased Premises, and to ensure that the behavior of its employees is consistent with promoting a high reputation and positive image of the County of Roanoke. (J) Tenant agrees to operate and maintain the Leased Premises in a clean and sanitary manner at all times. Page 5 of 19 (K) County agrees that Tenant will be allowed to change the locks to Leased Premises, provided that Tenant shall provide County a set of keys to the Leased Premises. Tenant further agrees to inform County in each instance when there is a turnover in management, and to provide a current list of the names and addresses of management personnel in each instance of turnover. Prior to beginning work at the Leased Premises, a criminal history search will be conducted for all Tenants' employees, either performed by the County or Tenant but paid for by Tenant. If the County believes an employee of Tenant demonstrates inappropriate behavior at the Leased Premises, the County may request of Tenant that the employee no longer work at the Leased Premises, and such request will not be unreasonably denied. (L) Tenant agrees to operate its business during regular library hours and/or by mutual agreement, as needed for hours of special events at the library. Tenant and County acknowledge that the mutual agreement may contain hours earlier than the library hours. Tenant may not close its business any day of the year except those days the building is not open, without approval from the County Library Director which approval shall not be unreasonably withheld. (M) Tenant may provide catering to any event in the library. Tenant may provide the County Library with catering information to be relayed to persons using the library facilities. Page 6 of 19 5. Rent. ***Rent shall be abated for the first six (6) months of the initial term, which does not include additional terms.*** Tenant shall pay rent to the County for the use of the Leased Premises based on gross monthly sales as follows: five percent (5%) of gross sales, calculated monthly. The gross sales shall include all catering done on Library property, as well as the sales of the coffee shop. The rent schedule shall be for the initial term, only and shall be renegotiated by mutual agreement for the two additional terms. Payment for each month based upon sales of that month must be remitted, no later than the 15th of the following month. The rent check and monthly gross sales data should be remitted to the attention and address in the Notices section of this Lease Agreement and made out to the Roanoke County Treasurer. No bills will be sent to Tenant. In the event the check is not received by the 25th of the month, a five percent (5%) late payment fee will be added to the amount of the rent due that month. 6. Security Deposit. The Tenant shall pay to County one thousand dollars ($1,000) as a Deposit. Unless offset for charges due under this Lease Agreement by the agreement of the parties, the security deposit will be returned to Mill Mountain within fourteen (14) business days following the termination of the Lease Agreement. 7. Use of Premises. (a)Tenant hereby agrees that the Leased Premises will be used by its employees and the general public for the purpose of providing meals, beverages, snacks and branded merchandise. The Leased Premises Page 7 of 19 shall not be put to any other use without the prior written consent of the County. (b)Tenant and the County agree that, except for Vinton County Library information and information from Tenant relating to its business, no notices or advertising of any type, such as might be portrayed on posters, handbills, flyers and business cards, is permitted to be posted, affixed or displayed in and around the Leased Premises. Tenant and the County agree that except for personal players used by the public with headphones or earbuds and heard only by the user, no music is permitted on and around the Leased Premises. (c) CAFE and PATIO SPACE: Tenant and Tenant's customers have the non- exclusive use of the Cafe area and the Patio area (as shown on "Exhibit A") Any litter or other associated evidence of use by the Tenant or its customers is the responsibility of the Tenant to control and remove. Tenant has an affirmative and continuous duty to clean such usage throughout the day. Any dispute regarding this usage should be brought to Landlord's attention immediately for resolution. 8. Inspection. Tenant shall permit County or its authorized agents to enter the Leased Premises for the purpose of inspection at any reasonable time or times and upon reasonable notice during the term of this Lease provided, however, that such inspections shall not unreasonably interfere with Tenant's use and occupancy of the Leased Premises. Page 8 of 19 9. Indemnification. Unless due in party by an act or omission of the County, its officers, employees, agents, volunteers or representatives, or patrons of the Vinton Library, Tenant agrees and binds itself and its successors and assigns to indemnify, keep and hold the County and its officers, employees, agents, volunteers and representatives free and harmless from any liability on account of any injury or damage of any typed to any person or property growing out of or directly or indirectly resulting from any negligent or intentional act or omission of Tenant including: (a) Tenant's use of the Leased Premises; (b) the exercise of any right or privilege granted by or under this Lease Agreement; or (c) the failure, refusal or neglect of Tenant to perform any duty imposed upon or assumed by Tenant by or under this Lease Agreement or by applicable law. In the event that any suit or proceeding shall be brought against the County or any of its officers, employees, agents, volunteers or representatives at law or in equity, either independently or jointly with Tenant on account of such indemnification, Tenant, upon notice giving to it by the County or any of its officers, employees, agents, volunteers or representatives, will pay all costs of defending the County or any of its officers, employees, agents, volunteers or representatives in any such action or other proceeding. In the event of any final judgment being awarded against the County or any or its officers, employees, agents, volunteers or representatives, either independently or jointly with Tenant, then Tenant will pay such judgment in full or will comply with such decree, pay all costs and Page 9 of 19 expenses of whatsoever nature and hold the County or any of its officers, employees, agents, volunteers or representatives harmless there from. 10.Insurance. Tenant shall, at its sole expense, obtain and maintain during the life of this Lease Agreement, the insurance policies required by this Section. Any required insurance policies shall be effective prior to the beginning date of this Lease Agreement. The following policies and overages are required: (a) Commercial General Liability. Commercial General Liability Insurance, written on an occurrence basis, including products/completed operations overage and fire damage legal liability coverage, shall insure against all claims, loss, cost, damage, expense or liability from loss of life or damage or injury to persons or property arising out of the Tenant's actions under this Lease Agreement. The minimum limits of liability for this coverage shall be $1,000,000 combined single limit for any one occurrence. Contractual Liability. Broad form Contractual Liability insurance shall include the indemnification obligation set forth in Section 9 of this Lease Agreement. (c) Tenant's Insurance. Tenant shall, at its sole cost and expense, obtain and maintain during the life of this Lease Agreement a property insurance policy written on an "all risk" basis insuring all of tenant's personal property, including, but not limited to, equipment, furniture, fixtures, furnishings, and leasehold improvements which are Tenant's responsibility, for not less than full replacement cost of such property. Page 10 of 19 All proceeds of such insurance shall be used to repair or replace Tenant's property. Workers' Compensation. Workers' Compensation insurance covering Tenant's statutory obligation under the laws of the Commonwealth of Virginia and Employer's Liability insurance shall be maintained for all its employees engaged in work on the Leased Premises. Minimum limits of liability for Employer's Liability shall be $100,000 bodily injury by disease (policy limit); and $100,000 bodily injury by disease (each employee). With respect to Workers' Compensation coverage, the Tenant's insurance company shall waive rights of subrogation against the County, its officers, employees, agents, volunteers and representatives. The insurance overages and amounts set forth in subsections (a), (b), (c) and (d) of this Section may be met by an umbrella liability policy following the form of the underlying primary coverage. Should an umbrella liability insurance coverage policy be used, such overage shall be accompanied by a certificate of endorsement stating that it applies to the specific policy numbers indicated for the insurance providing the overages required by subsection (a), (b), (c) and (d), and it is further agreed that such statement shall be made a part of the certificate of insurance furnished by Tenant to the County. All insurance shall meet the following requirements: Page 11 of 19 (a) Tenant shall furnish the County a certificate or certificates of insurance showing the type, amount, effective dates and date of expiration of the policies. Certificates of insurance shall include any insurance deductibles. (b) The required certificate or certificates of insurance shall include substantially the following statement: "The insurance covered by this certificate shall not be canceled or materially altered, except after thirty (30) days written notice has been received by the Risk Management Officer for the County of Roanoke." (c) The required certificate or certificates of insurance shall name the County of Roanoke, its officers, employees, agents, volunteers and representatives as additional insureds. (d) Where waiver of subrogation is required with respect to any policy of insurance required under this Section, such waiver shall be specified on the certificate of insurance. (e) Insurance coverage shall be in a form and with an insurance company approved by the County which approval shall not be unreasonably withheld. Any insurance company providing coverage under this Lease Agreement shall be authorized to do business in the Commonwealth of Virginia. 11. Destruction of Premises. (A) Tenant shall be responsible for insuring all personal property, equipment, and trade fixtures, and Tenant shall hold County harmless for said items, if destroyed or damage by fire or otherwise. Page 12 of 19 (B) If the Leased Premises are damaged or destroyed in whole or in part by fire or other casualty and the same can be repaired or restored within one hundred twenty (120) days from the date of the damage, County shall repair the Leased Premises within the said period and no rent shall be due until repaired and certified for occupancy. (C) In the event the Leased Premises are damaged and destroyed and cannot be repaired or restored within one hundred twenty (120) days from the date of the damage, either County or Tenant may terminate this Lease by giving written notice to the other within thirty (30) days after the damage occurs, in which event this Lease shall terminate, and rent shall abate in total from the date of such damage or destruction. If neither party elects to terminate this Lease, County shall proceed with due diligence to repair and restore the Leased Premises and the rent shall abate in proportion to the extent Tenant is unable to conduct its business in a normal manner from the date of such damage or destruction. 12. Assignment. Tenant shall not assign or transfer this Lease in whole or in part, sublet or license the Leased Premises or any part thereof without the prior written consent of the County, which consent shall not be unreasonably withheld. Unless otherwise agreed to by the County, if consent to assign or sublease is given, no such assignment or sublease shall in any way release or relieve Tenant from any of its covenants or undertakings contained in this Lease, and Tenant shall remain liable on this Lease during the term thereof. Page 13 of 19 13. Default. It is understood and agreed by and between the County and the Tenant that in the event of breach by County or Tenant of any of the covenants and agreements herein contained, the aggrieved [arty may serve a written thirty (30) day notice of default, specifying such default, on the breaching party. If such default tis not remedied within said thirty (30) days, this Lease Agreement shall automatically end and expire; provided, however, if the default involves the failure of County to perform its maintenance obligations under Paragraph 4 and the failure impairs Tenants business operations, County shall have a reasonable period of time to cure not to exceed forty-five (45) days. In the event rent is not paid according to the terms of this lease, County reserves the right to have this tenancy expire at its option, unless County gives Tenant additional time to pay the rent. In the event County terminates this lease, County shall have the right to immediately reenter and take back the Leased Premises without resort to any legal proceedings. 14. Taxes and Assessments. Tenant agrees that it will be responsible for the payment of any leasehold taxes or other legal taxes, charges or assessments imposed by virtue of its occupancy of the Leased Premises. Tenant agrees to pay all applicable local taxes, including but not limited to meals tax, sales tax, business license tax, and business personal property taxes. 15. Compliance with Laws and Food Safety Practices. Tenant agrees to conform to and not to violate the U.S. Food and Drug Administration (FDA) Page 14 of 19 Food Code, the Americans with Disabilities Act (ADA), in addition to all other applicable laws, ordinances, rules, regulations, and requirements of federal, state, county, municipal, or other governmental authorities and the various departments thereof now existing or hereinafter created affecting Tenant's use and occupancy of the Leased Premises. Tenant specifically agrees to comply with all laws relevant to food safety practices that are standard in the restaurant industry and to adhere to proper food preparation, storage, and disposal practices. Tenant shall regularly inspect its inventory and promptly dispose of and not sell or use any products that have expired or whose sell by date has passed. In the event that Tenant breaches this duty, or such breach is not cured within twenty-four hours after Tenant receives notice of such breach, or if Tenant receives more than five (5) violations from the Virginia Department of Health within six months County reserves the right to terminate this lease agreement without incurring any liability to Tenant. 16. Tenant's Obligation to Quit Premises. Tenant shall, upon the expiration or termination of this Lease, peaceably quit and deliver to County possession of the Leased Premises in the same condition as the date of commencement, normal wear and tear and damage caused by fire, or natural disaster expected, and shall promptly clean up and remove all its personal property and non -fixture items on the Leased Premises. 17. Fixtures. (A) All fixtures, equipment, improvements, and appurtenances permanently vacated to or built into the Leased Premises, whether or not by Page 15 of 19 or at the expense of Tenant, and any personal property of the County or installed by the County in the Leased Premises shall be and remain a part of the Leased Premises and shall be deemed property of the County and shall not be removed by Tenant. (B) All moveable partitions, furnishings, furniture, machinery and equipment, communications equipment, and other personal property located in the Leased Premises and acquired by or for the account of Tenant without expenses to County may be removed by Tenant at any time during the term hereof, provided that Tenant shall repair any damage to the Leased Premises resulting from such removal to the reasonable satisfaction of the County. 18. Peaceful Enjoyment. County covenants and agrees that it and so long as Tenant shall pay the rent called for under this Lease as the same shall become due and shall keep all the covenants and agreements required by tit to be kept during the Lease and shall perform all its other obligations hereunder, Tenant shall have the peaceful and quiet occupation and enjoyment of the Leased Premises. 19. Notices. Notices given under the terms of this Lease shall be deemed property served if such notice is mailed by Certified United States Mail, Return Receipt Requested; if to County addressed to the Purchasing Manager, County of Roanoke, P.O. Box 29800, Roanoke, Virginia 24018 and if to Tenant addressed to 90 Towncenter Street, Suite 106; Daleville, VA 24085. Notice mailed in accordance with the provisions hereto shall be Page 16 of 19 deemed to have been given as of the date of receipt or the third business day following the date of such mailing, whichever date is earlier. 20. Covenants and Conditions. Each provision of this Lease shall be deemed to be both a covenant and a condition running with the land unless otherwise provided. 21. Conveyances. If County sells, conveys or passes title to the Leased Premises, the Tenant shall be bound by the terms and conditions herein to the new owner of the Leased Premises and the new owner shall take title subject to this leasehold interest. In the event of any such sale or conveyance, Tenant shall have the right to terminate this Lease as of the closing date or at any time within thirty calendar days following such sale or conveyance. 22. Severability. If any clause or provision of this Lease is or becomes illegal or unenforceable because of present or future laws or rules or regulations of any governmental body or entity, effective during the term of this Lease, the intention of the parties hereto is that the remaining parts of this Lease shall not be affected thereby unless such clause or provision is, in the reasonable determination of both Tenant and County, essential and marital to their respective rights, in which event either party shall have the right to terminate this Lease upon thirty (30) days written notice to the other party. 23. Non -waiver. Both parties agree that the other party's waiver or failure to enforce or require performance of any term or condition of the Lease Agreement or any waiver of any particular breach of the Lease Agreement Page 17 of 19 extends to that instance only. Such waiver or failure is not and shall not be a waiver of any of the terms or conditions of the Lease Agreement or a waiver of any breaches of that agreement and does not bar either party from requiring the other party to comply with all the terms and conditions of the Lease Agreement and does not bar the Assertion of any and all rights and remedies under the Lease Agreement or by law. 24. Successors and Assigns. This Lease Agreement shall be binding upon the parties and their successors and assigns. 25. Governing Law. This Lease Agreement shall be governed by and construed in accordance with the laws of the Commonwealth of Virginia. 26. No Broker. The parties covenant that this Lease Agreement was directly negotiated between them and no broker was involved in bringing about this Agreement. No claim of a broker's fee shall be made against either party. 27. Completeness of Agreement. This document, together with Exhibit A, B. and C, constitutes the entire agreement between the parties and supersedes any prior understanding or written or oral agreements between the parties respecting the within subject matter. No changes or modifications of any of the covenants, terms or conditions hereof shall be valid unless in writing and signed by authorized officers of the parties hereto. IN WITNESS WHEREOF, the parties hereto have affixed their signatures the day and year first above written. Page 18 of 19 ATTEST: Chief Deputy Clerk ATTEST: ATTEST: Approved as to Form: COUNTY OF ROANOKE, VIRGINIA Thomas C. Gates County Administrator Gregory Felts President and Co -Owner Nature's Cool Coffee, Inc. d/b/a Land of a Thousand Hills Coffee Company Tenant go Page 19 of 19 Penny P. Felts Co-owner/officer Nature's Cool Coffee, Inc. d/b/a Land of a Thousand Hills Coffee Company k 4� I ' N 9! AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AUTHORIZING THE LEASE OF SPACE IN THE VINTON LIBRARY TO NATURES COOL COFFEE d/b/a LAND OF A THOUSAND HILLS COFFEE COMPANY FOR THE OPEATION OF A COFFEE SHOP WHEREAS, the new Vinton Library is currently being constructed and will include a coffee shop area in the community section of the building consisting of a cafe preparation area, counter area, seating area as well as a drive through window; and WHEREAS, the County has negotiated a lease agreement with Natures Cool Coffee d/b/a Land of a Thousand Hills Coffee Company for the operation of the coffee shop for the initial five (5) year period beginning November 16, 2015, through November 16, 2020, with the option to extend the lease for two (2) additional three (3) year terms, upon the certain terms and conditions, and that the rent for the leased premises will be abated for the first six (6) months of the lease and begin for the seventh (7) month and will be based on five (5) percent of the gross monthly sales; the rent schedule for any renewals are subject to change and mutual agreement; and BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows.. 1. That pursuant to the provisions of Section 18.04 of the Charter of Roanoke County, a first reading concerning the disposition of the herein -described real estate was held on September 22, 2015; the second reading and public hearing was held on October 13, 2015; and Page 1 of 2 2. That the property to be leased consists of square feet located on the floor of the Vinton Library, as shown on the attached Exhibit "A"; and 3. That it is in the County's best interests to lease this property to Nature's Cool Coffee d/b/a Land of a Thousand Hills Coffee Company for the operation of a coffee shop area in the Vinton Library. 4. That the County Administrator, or his designee, is authorized to execute such documents and take such actions on behalf of Roanoke County as are necessary to accomplish this transaction, all of which shall be upon a form approved by the County Attorney. Page 2 of 2 ACTION NO. ITEM NO. F-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance authorizing the purchase of approximately five point two five (5.25) acres of real estate (Tax Map No. 080.00-05- 19.00-0000) located at the corner of Rutrough Road and Chestnut Ridge Road from Timothy and Sean Martin for public use as a recreational amenity in the Vinton Magisterial District for $159,900 and reallocate funds from the Parks, Recreation and Tourism Reserve Account for such purpose SUBMITTED BY: Doug Blount Director of Parks, Recreation and Tourism APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The County of Roanoke has negotiated a contract to acquire approximately five point two five (5.25) acres from Timothy and Sean Martin for $154,900. The parcel (Tax Map No. 080.00-05-19.00-0000) is located in the Vinton Magisterial District and lies adjacent to the Rutrough Road (State Route 618) and Chestnut Ridge Rd (private road) at the service entrance of Explore Park. County staff recently became aware of a property for sale, which lies adjacent to the service road entrance to Explore Park. The property is currently owned by Timothy and Sean Martin who advertised the sale of the property in June of 2015 through Anglin Realty. The listing price is $162,900, which is equivalent to the Roanoke County assessment value. The land is in good condition with an extensive tree canopy and a small pond. The dwelling on the property was built in 1954 and will need a few repairs but could be used for park operations. Benefits to Explore Park and Roanoke County's park system in general include: a. Additional acreage to the existing four hundred (400) -acre track at Explore Park. Page 1 of 2 b. Topography, which can be used for a variety of recreational amenities such as camping, camps, retail operations, etc. as well as additional open space for parking, trails, picnicking and passive recreation functions. All of these park needs/desires will be evaluated in the master plan for Explore Park. c. Additional development value to the main four hundred (400) -acre track (i.e., upgrading Chestnut Ridge Road to a public road). d. Creation of a buffer between the area residents and the park. Acquisition of this property will provide flexibility in the master planning of the existing eleven hundred (1,100) acres as well increase the park buffer with the residents in the community. FISCAL IMPACT The purchase price of the property is $154,900. In addition, staff will need approximately $5,000 for the Phase I environmental assessment, boundary survey, title examination, title insurance and recordation expenses. The sum of $159,900 is available in the Parks, Recreation and Tourism department reserve account and will be reallocated for such purpose In accordance with the Contract, the sale of the property is contingent upon a boundary survey, title examination, and environmental assessment. Each of these items is currently being performed, and staff anticipates the receipt of these reports for presentation to the Board at the second reading on October 13, 2015. If unsatisfactory reports are received, the County may elect to terminate this contact upon written notice to the seller. ALTERNATIVES 1. Approve ordinance to purchase approximately five point two five (5.25) acres at 3906 Rutrough Road from Timothy and Sean Martin and reallocate $159,900 for this purpose. 2. Do not approve the ordinance for the land purchase. STAFF RECOMMENDATION: Staff recommends Alternative 1 to approve the attached ordinance authorizing the purchase of approximately 5.25 acres of real estate (Tax Map No. 080.00-05-19.00-0000) from Timothy and Sean Martin for recreational purposes at first reading and schedule public hearing and second reading for October 13, 2015. ATTACHMENTS 1. Property Map Oblique 2. Tax Summary for Parcel No. 080.00-05-19.00-0000 Page 2 of 2 0 ct U 0 O O a O —_ O y O V L CL o — 0 0 O O co O i O CL LO N co M 7 z c 7 O 0 0 a A N Q O aL 3 O J f4 7 C O E 0 C t/1 d ca co N CL 0 a c i 7 A lim O 0 N O N co O � V �a �i w LO 0 T- N O N ui L m L a C J N N E N CL L- CL .mss F'� I N yyA 4 dIp ] J N V mil0 s� II n u❑ N4 E❑ �J ] ❑J Nm� a n N N a n cl m o Na y 4 M cl ❑ cl n e m m N N N m AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER, TUESDAY, SEPTEMBER 22, 2015 ORDINANCE TO APPROVE THE PURCHASE OF FIVE POINT TWO FIVE (5.25) ACRES OF REAL ESTATE (TAX MAP NO. 080.00-05-19.00- 0000) FOR PUBLIC USE AS A RECREATIONAL AMENITY, VINTON MAGISTERIAL DISTRICT WHEREAS, Timothy and Sean Martin (the "Owners") are the owners of a 5.25 acre parcel located at the corner of Rutrough Road and Chestnut Ridge Road in the Vinton Magisterial District ; and WHEREAS, the Board of Supervisors of Roanoke County has determined that it is in the public interest to acquire this property for public use as a recreational amenity; and WHEREAS, the Board of Supervisors and the Owners executed a contract on , with a contract price of $154,900, with funds from the Parks, Recreation and Tourism Reserve account; and WHEREAS, the contract provided the County with a three (3) month due diligence period for examination of title, environmental and survey, which have now been completed to the satisfaction of the County ; and WHEREAS, Section 18.04 of the Roanoke County Charter directs that the acquisition and conveyance of real estate interests be accomplished by ordinance; the first reading of this ordinance to be held on September 22, 2015; and the second reading and public hearing to be held on October 13, 2015. NOW THEREFORE, BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: Page 1 of 2 1. That the acquisition of the five point two five (5.25) acre parcel of real estate located on the Vinton Magisterial District (Tax Map No. 080.00-05-19.00- 0000) is hereby authorized and approved at the purchase price of $ 154,900. 2. That the expenditure of funds for Phase I environmental assessment, boundary survey, title examination, title insurance and recordation expenses. totaling $5,000 is hereby authorized and approved. 3. That funds are available in the adopted budgets of the Parks, Recreation and Tourism Reserve Account to pay the costs of this acquisition. 4. That the County Administrator or Assistant County Administrator are hereby authorized to execute such documents and take such actions on behalf of Roanoke County in this matter as are necessary to accomplish the acquisition of this real estate, all of which shall be approved as to form by the County Attorney. Page 2 of 2 ACTION NO. ITEM NO. G-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance amending Article II. — Regulation of Open Burning of Chapter 9 — Fire Prevention and Protection of the Roanoke County Code SUBMITTED BY: APPROVED BY: Stephen Simon Chief of Fire and Rescue Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: This is the second reading of an ordinance amending the open burning section of the Roanoke County Code. The first reading was held on August 25, 2015. In accordance with the Clean Air Act, the Commonwealth State Air Pollution Board has revised and enacted new regulations as it relates to open fire burning. The goal of the regulations is to reduce excessive volatile organic compound emissions in the Western Emissions Control Area which incorporates the County of Roanoke. The Fire and Rescue Department Fire Marshal's Office is the mandated agency to enforce the open burn law. Changes to the Commonwealth's open burning regulations that took effect July 15, 2015, reduce the areas of the County that are allowed to have open burns. In most instances, open burning is not permitted if the resident has brush pick-up by the County. The new regulations, while similar to the current County Open Burn Ordinance require our local ordinance to be amended to meet the Department of Environmental Quality (DEQ) State Air Pollution Control Board requirements. In an effort to inform the public of the regulatory change, Fire/Rescue staff have mailed letters to all individuals who had received a burn permit in the last five (5) years. The letter explains the changes and offers assistance to residents who may have questions. Page 1 of 2 FISCAL IMPACT: The fiscal impact is projected to be minimal initially, however a monitoring and review process will be implemented to determine if citizens who no longer have the ability to open burn utilize brush pick-up offered by General Services. ALTERNATIVES: The new regulations are a mandated requirement through the Commonwealth and no alternative is being proposed. STAFF RECOMMENDATION: Staff recommends an amendment to the current County Ordinance to comply with the new regulations. Page 2 of 2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AMENDING ARTICLE II. — REGULATION OF OPEN BURNING OF CHAPTER 9 — FIRE PREVENTION AND PROTECTION OF THE ROANOKE COUNTY CODE WHEREAS, the Commonwealth of Virginia, State Air Pollution Control Board has adopted new regulations for open burning and said regulations are found at 9VAC5 Chapter 130; and WHEREAS, these regulations include a proposed model ordinance for local governments in this Commonwealth to adopt in order to assist local governments in a VOC (Volatile Organic Compound) control area with the development of their ordinances acceptable to the State Air Pollution Control Board; and WHEREAS, if the governing body of any locality wishes to adopt an ordinance governing open burning that ordinance must first be approved by the State Air Pollution Control Board unless that ordinance is identical to the language of the model ordinance; and WHEREAS, Roanoke County adopted its ordinance regulating open burning by Ordinance #092496-6 on September 24, 1996; and WHEREAS, Roanoke County's 1996 ordinance is hereby amended to incorporate the provisions of the model ordinance recommended by the State Air Pollution Control Board; and WHEREAS, the first reading of this ordinance is scheduled for August 25, 2015, and the second reading is scheduled for September 8, 2015; and Page 1 of 10 NOW, THEREFORE, BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That Article II. — Regulation of Open Burning of Chapter 9 — Fire Prevention and Protection be amended to read and provide as follows: ARTICLE II. - REGULATION OF OPEN BURNING Sec. 9-5. - Title. This article shall be known as the Roanoke County ordinance for the regulation of open burning. Sec. 9-6. - Purpose. The purpose of this article is to protect public health, safety, and welfare by regulating open burning within the county to achieve and maintain, to the greatest extent practicable, a level of air quality that will provide comfort and convenience while promoting economic and social development. This article is intended to supplement the applicable regulations promulgated by the state air pollution control board and other applicable regulations and laws. Sec. 9-7. - Definitions. For the purpose of this article and subsequent amendments or any orders issued by the county, the words or phrases shall have the meaning given them in this section. Automobile graveyard means any lot or place which is exposed to the weather and upon which more than five (5) motor vehicles of any kind, incapable of being operated, and which it would not be economically practical to make operative, are placed, located or found. "Built-up area" means any area with a substantial portion covered by industrial, commercial or residential buildings. QlGan hiirniniv waste--F?tGaRG waste eihinh GIGGG RP onoo omeke `"w�'rhep hi irAP-d onrl is nn+ PrnhihitP_d +n ho hi irAP-d i AGIP-F this oAdinlo "Clean burning waste" means waste that is not prohibited to be burned under this ordinance and that consists only of (i) 100% wood waste, (ii) 100% clean lumber or clean wood, (iii) 100% yard waste, or (iv) 100% mixture of only any combination of wood waste, clean lumber, clean wood or yard waste. "Clean lumber" means wood or wood products that have been cut or shaped and include wet, air-dried, and kiln -dried wood products. Clean lumber does not include Page 2 of 10 wood products that have been painted, pigment -stained, or pressure -treated by compounds such as chromate copper arsenate, pentachlorophenol, and creosote. "Clean wood" means uncontaminated natural or untreated wood. Clean wood includes, but is not limited to, by-products of harvesting activities conducted for forest management or commercial logging, or mill residues consisting of bark, chips, edgings, sawdust, shavings or slabs. It does not include wood that has been treated, adulterated, or chemically changed in some way; treated with glues, binders or resins; or painted, stained or coated. v(`GRStFUFnti9r waste etid-tlVA—S}o –avihirnhrrio r F9GIuccc%gcRrGFated rig 0 0 0 prastiGs arer,a--paFt E)fthe mateFials E)f GE) StFUIEtiE)R E))F eFnpty GE)RtaiReFS fE)F SUGh liquids, and garbage are Ret wastes and the dispesal ef 661 "Construction waste" means solid waste that is produced or generated during construction remodeling, or repair of pavements, houses, commercial buildings and other structures. Construction waste consists of lumber, wire, sheetrock, broken brick, shingles, glass, pipes, concrete, and metal and plastics if the metal or plastics are a part of the materials of construction or empty containers for such materials. Paints, coatings, solvents, asbestos, any liquid, compressed gases or semi -liquids, and garbage are not construction wastes and the disposal of such materials must be in accordance with the regulations of the Virginia Waste Management Board. Debris waste means stumps, wood, brush, and leaves from land clearing operations. Debris wastes include but are not limited to stumps, wood, brush, leaves, soil and road spills. Demolition waste means that solid waste which is produced by the destruction of structures and their foundations, or both, and includes the same materials as construction waste. Garbage means readily putrescible discarded materials composed of animal, vegetable or other organic matter. r„++iRg aRiMal and vegetable matteF FR fated h., a hni 16;89hn1r•! in tho nni irco of nrr•liRary day to da10V0 Rrr Hazardous waste means a "hazardous waste" as described in 9VAC20-60 (Hazardous Waste Manaaement Reaulations). r Se r -r ^ atm efT wh�� Page 3 of 10 Heuseh�ofi i�TeaRS waste m..teri�d trash normally aGGI imi ilotted by a heuGeheld in the nn, arse of erdinory day tn_day liViRg "Household waste" means any waste material, including garbage, trash and refuse derived from households. For purposes of this regulation, households include single and multiple residences, hotels and motels, bunkhouses, ranger stations, crew quarters, campgrounds, picnic grounds and day-use recreation areas. Household wastes do not include sanitary waste in septic tanks (septage) which is regulated by state agencies. "Industrial waste" means any solid waste generated by manufacturing or industrial process that is not a regulated hazardous waste. Such waste may include but is not limited to waste resulting from the following manufacturing processes: electric power generation; fertilizer/agricultural chemicals; food and related products/by products; inorganic chemicals; iron and steel manufacturing; leather and leather products; nonferrous metals manufacturing/foundries; organic chemicals; plastics and resins manufacturing; pulp and paper industry; rubber and miscellaneous plastic products; stone, glass, clay and concrete products; textile manufacturing; transportation equipment; and water treatment. This term does not include mining waste or oil and gas waste. , plaRtc slaughter he ices and steel mills-rrrc�� r n -re�cu , , Junkyard means an establishment or place of business which is maintained, operated, or used for storing, keeping, buying, or selling junk, or for the maintenance or operation of an automobile graveyard, and the term shall include garbage dumps and sanitary fills. Landfill means a sanitary landfill, an industrial waste landfill, or a construction/demolition/debris landfill. See Solid Waste Management Regulations 6'�99VAC20-81) for further definitions of these terms. Local landfill means any landfill located within the jurisdiction of a local government. burnina" means the combustion of solid waste without: 1. Control of combustion air to maintain adequate temperature for efficient combustion; 2. Containment of the combustion reaction in an enclosed device to provide sufficient residence time and mixina for comalete combustion: and 3. Control of the combustion products' emission. Open pit incinerator means a device used to burn waste for the primary purpose of reducing the volume by removing combustible matter. Such devices function by directing a curtain of air at an angle across the top of a trench or similarly enclosed space, thus reducing the amount of combustion by-products emitted into the Page 4 of 10 atmosphere. The term also includes trench burners, air curtain destructors and over draft incinerators. "Refuse" means all solid waste products having the characteristics of solids rather than liquids and which are composed wholly or partially of materials such as garbage, trash, rubbish, litter, residues from clean up of spills or contamination or other discarded materials. Refuse m ri ibbish gaFb ge er fermG of Gelid- er lidvi did- �e aE;te i-ccr��c-nT�S�rmrsn�arr.�ug� ��--rvrm��v c� omereoneY eperatieps Salvage operation means any operation consisting of a business, trade or industry participating in salvaging or reclaiming any product or material, such as, but not limited to, reprocessing of used motor oils, metals, chemicals, shipping containers or drums, and specifically including automobile graveyards and junkyards. Sanitary landfill means an engineered land burial facility for the disposal of household waste which is so located, designed, constructed, and operated to contain and isolate the waste so that it does not pose a substantial present or potential hazard to human health or the environment. A sanitary landfill also may receive other types of solid wastes, such as commercial solid waste, nonhazardous sludge, hazardous waste from conditionally exempt small quantity generators, and nonhazardous industrial solid waste. See Solid Waste Management Regulations C872 2 for further definitions of these terms. Smoke means small gas -borne particulate matter consisting mostly, but not exclusively, of carbon, ash and other material in concentrations sufficient to form a visible plume. Special incineration device means a pit incinerator, conical or teepee burner, or any other device specifically designed to provide good combustion performance. "Wood waste" means untreated wood and untreated wood products, including tree stumps (whole or chipped), trees, tree limbs (whole or chipped), bark, sawdust, chips, scraps, slabs, millings, and shavings. Wood waste does not include: 1. Grass, grass clippings, bushes, shrubs, and clippings from bushes and shrubs from residential, commercial/retail, institutional, or industrial sources as part of maintaining yards or other private or public lands. 2. Construction, renovation, or demolition wastes. 3. Clean lumber. "Yard waste" means grass, grass clippings, bushes, shrubs, and clippings from bushes and shrubs that come from residential, commercial/retail, institutional, or industrial sources as part of maintaining yards or other private or public lands. Yard waste does not include (i) construction. renovation. and demolition wastes or (ii) clean wood Page 5 of 10 Sec. 9-8. - Prohibitions on open burning. (a) No owner or other person shall cause or permit open burning or the use of a special incineration device for disposal of refuse except as provided in this article. (b) No owner or other person shall cause or permit open burning or the use of a special incineration device for disposal of rubber tires, asphaltic materials, crankcase oil, impregnated wood or other rubber or petroleum based materials except when conducting bona fide fire fighting instruction at fire fighting training schools having permanent facilities. (c) No owner or other person shall cause or permit open burning or the use of a special incineration device for disposal of hazardous waste or containers for such materials. (d) No owner or other person shall cause or permit open burning or the use of a special incineration device for the purpose of a salvage operation or for the disposal of commercial/industrial waste. (e) Open burning or the use of special incineration devices permitted under the provisions of this article does not exempt or excuse any owner or other person from the consequences, liability, damages or injuries which may result from such conduct; nor does it excuse or exempt any owner or other person from complying with other applicable laws, ordinances, regulations and orders of the governmental entities having jurisdiction, even though the open burning is conducted in compliance with this article. In this regard special attention should be directed to section 10.1-1142 of the Forest Fire Law of Virginia, the regulations of the Virginia Waste Management Board, and the state air pollution control board's regulations for the control and abatement of air pollution. (f) Upon declaration of an alert, warning or emergency stage of an air pollution episode as described in 9VAC5-70 (Air Pollution Episode Prevention) Dart V41ef the reg it dens fer we nnntrnl aAd ahatomon+ .,f ,;r PGII61tiGR or when deemed advisable by the state air pollution control board to prevent a hazard to, or an unreasonable burden upon, public health or welfare, no owner or other person shall cause or permit open burning or use of a special incineration device; and any in process burning or use of special incineration devices shall be immediately terminated in the designated air quality control region. Sec. 9-9. - Exemptions The following activities are exempted to the extent covered by the state air pollution control board's regulations for the control and abatement of air pollution: (1) Open burning for training and instruction of government and public fire fighters under the supervision of the designated official and industrial in-house fire fighting personnel; (2) Open burning for camp fires or other fires that are used solely for recreational purposes, for ceremonial occasions, for outdoor noncommercial preparation of food, and for warming of outdoor workers; Page 6 of 10 (3) Open burning for the destruction of any combustible liquid or gaseous material by burning in a flare or flare stack; (4) Open burning for forest management and agriculture practices and highway construcalcri ana ma r-Iteriance prograrn approved by the State Air Pollution Control Board; and (5) Open burning for the destruction of classified military documents. Sec. 9-10. - Permissible open burning. (a) Open burning is permitted for the disposal of leaves and tree, yard and garden trimmings located on the premises of private property, provided that the conditions are met: (1) The burning takes place on the premises of the private property; and (2) The location of the burning is not less than three hundred (300) feet from any occupied building unless the occupants have given prior permission, other than a building located on the property on which the burning is conducted; and 3. No regularly scheduled collection service for such trimmings is available at the adjacent street or public road). �ioilohlo Ot the adjaGont 6#88t nr ni ihlin rnorJ (b) Open burning is permitted on-site for the dispe destruction of household refuse by homeowners or tenants, provided that the following conditions are met: (1) The burning takes place on the premises of the dwelling; (2) Animal carcasses or animal wastes are not burned; (3) Garbage is not burned; (4) The location of the burning is not less than three hundred (300) feet from any occupied building unless the occupants have given prior permission, other than a building located on the property on which the burning is conducted; and 5. No regularly scheduled collection service for such retuse is available at the adjacent street or public road). _(5) Ne Feg laFl� i it P blip nr r�riVate nnllon�n oor�iino fnr of inh r oo io "`J "� `^ � 7 "" � � [c-cvrtcc i"racr'o-rcc-rvr�acrrr at the adjaGGRt 6#88t GF P61bliG read-. (c) Open burning is permitted for the disposal of debris waste resulting from property maintenance, from the development or modification of roads and highways, parking areas, railroad tracks, pipelines, power and communication lines, buildings or building areas, sanitary landfills, or from any other clearing operations which may be approved by the Roanoke County fire marshal, provided the following conditions are met: Page 7 of 10 (1) All reasonable effort shall be made to minimize the amount of material burned, with the number and size of the debris piles approved by the Roanoke County fire marshal; (2) The material to be burned shall consist of brush, stumps and similar debris waste and shall not include demolition material; (3) The burning shall be at least 500 feet from any occupied building unless the occupants have given prior permission, other than a building located on the property on which the burning is conducted; (4) The burning shall be conducted at the greatest distance practicable from highways and air fields; (5) The burning shall be attended at all times and conducted to ensure the best possible combustion with a minimum of smoke being produced; (6) The burning shall not be allowed to smolder beyond the minimum period of time necessary for the destruction of the materials; and (7) The burning shall be conducted only when the prevailing winds are away from any city, town or built-up area. (d) Open burning is permitted for the disposal of debris on the site of local landfills provided that the burning does not take place on land that has been filled and covered so as to present an underground fire hazard due to the presence of methane gas provided the following conditions are met: (1) The burning shall take place on the premises of a local sanitary landfill which meets the provisions of the regulations of the Virginia Waste Management Board; (2) The burning shall be attended at all times; (3) The material to be burned shall consist only of brush, tree trimmings, yard and garden trimmings, clean burning construction waste, clean burning debris waste, or clean burning demolition waste; (4) All reasonable effort shall be made to minimize the amount of material that is burned; (5) No materials may be burned in violation of the regulations of the Virginia Waste Management Board or the state air pollution control board. The exact site of the burning on a local landfill shall be established in coordination with the regional director and the Roanoke County fire marshal; no other site shall be used without the approval of these officials. The Roanoke County fire marshal shall be notified of the days during which the burning will occur. (E. Sections 9-10.h. through D. notwithstanding, no owner or other person shall cause or permit open burning or the use of a special incineration device from May 1 through September 30. Sec. 9-11. - Permits. Page 8 of 10 (a) When open burning of debris waste (section 9-10(c)) or open burning of debris on the site of a local landfill (section 9-10(d)) is to occur within the county, the person responsible for the burning shall obtain a permit from the county fire marshal prior to the burning. Such a permit may be granted only after confirmation by the county fire marshal that the burning can and will comply with the provisions of this article and any other conditions which are deemed necessary to ensure that the burning will not endanger the public health and welfare and to ensure compliance with any applicable provisions of the state air pollution control board's regulations for the control and abatement of air pollution. The permit may be issued for each occasion of burning or for a specific period of time deemed appropriate by the county fire marshal. (b) Prior to the initial installation (or reinstallation, in cases of relocation) and operation of special incineration devices, the person responsible for the burning shall obtain a permit from the county fire marshal, such permits to be granted only after confirmation by the county fire marshal that the burning can and will comply with the applicable provisions in regulations for the control and abatement of air pollution and that any conditions are met which are deemed necessary by the county fire marshal to ensure that the operation of the devices will not endanger the public health and welfare. Permits granted for the use of special incineration devices shall, at a minimum, contain the following conditions: (1) All reasonable effort shall be made to minimize the amount of material that is burned. Such efforts shall include, but are not limited to, the removal of pulpwood, sawlogs and firewood. (2) The material to be burned shall consist of brush, stumps and similar debris waste and shall not include demolition material. (3) The burning shall be at least three hundred (300) feet from any occupied building unless the occupants have given prior permission, other than a building located on the property on which the burning is conducted; burning shall be conducted at the greatest distance practicable from highways and air fields. If the county fire marshal determines that it is necessary to protect public health and welfare, he may direct that any of the above cited distances be increased. (4) The burning shall be attended at all times and conducted to ensure the best possible combustion with a minimum of smoke being produced. Under no circumstances should the burning be allowed to smolder beyond the minimum period of time necessary for the destruction of the materials. (5) The burning shall be conducted only when the prevailing winds are away from any city, town or built-up area. (6) The use of special incineration devices shall be allowed only for the disposal of debris waste, clean burning construction waste, and clean burning demolition waste. (7) Permits issued under this subsection shall be limited to a specific period of time deemed appropriate by the county fire marshal. Page 9 of 10 Sec. 9-12. - Penalties for violation. (a) Any violation of this article is punishable as a Class I misdemeanor. (b) Each separate incident may be considered a new violation. Sec. 9-13-9-15. - Reserved. 2. That this ordinance shall be in full force and effect from and after its adoption. Page 10 of 10 ACTION NO. ITEM NO. H-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance authorizing the granting of an electric utility easement to Appalachian Power (AEP) on property owned by the Roanoke County Board of Supervisors (Tax Map No. 055.00-01-08.00) for the purpose of an underground electric power line to Green Hill Park Ball Field at 3050 Green Hill Park Road, Catawba Magisterial District SUBMITTED BY: Paul M. Mahoney County Attorney COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Appalachian Power is requesting that Roanoke County grant an electric line easement from an existing overhead line for purposes of an underground electric service to the Green Hill Park Ball Field. A drawing entitled "Proposed Right of Way on Property of Roanoke County Board of Supervisors" plan prepared by AEP, dated 7/16/2015, indicating the proposed location of an underground electric line and transformer pad is attached. Staff has met with officials of AEP on site and has determined the location of the easement will have a minimal amount of impact on County -owned property. The underground line will have no impact on County maintenance. This is the second reading of this ordinance; the first reading was held on September 8, 2015. FISCAL IMPACT: No funding from Roanoke County will be required for this request. Page 1 of 2 ALTERNATIVES: Authorize the granting of an electric easement to Appalachian Power for the purpose of an underground electric line to the Green Hill Park Ball Field. 2. Decline to authorize the requested easement. STAFF RECOMMENDATION: Staff recommends Alternative 1. Page 2 of 2 TAX PARCEL No. 055.00-01-08.00-0000 Map No. 3780-250-134 Prop No. 1 THIS AGREEMENT, made this W. O. No. W002603201 Job No. 15 100051 day of , 2015, by and between the BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, herein called "Grantors," and APPALACHIAN POWER COMPANY, a Virginia corporation, herein called "Appalachian." WITNESSETH: THAT for and in consideration of the sum of ONE DOLLAR ($1.00), cash in hand or other good and valuable consideration paid to Grantors by Appalachian, the receipt whereof is hereby acknowledged, Grantors hereby grant and convey to Appalachian, its successors and assigns, a " non— exclusive " right of way and easement with the right, privilege and authority to Appalachian, its successors and assigns to construct, erect, install, operate, maintain, renew and remove a line or lines, for the purpose of transmitting electric power underground, including electric service lines and extensions therefrom, in, on, along, over, through, across and under the lands of the Grantors identified as Tax Parcel 055.00-01-08.00-0000, situated in Catawba District, County of Roanoke. Being a right of way and easement to provide electrical service to Green Hill Park Ballfield at 3050 Green Hill Park Road. Said right of way and easement depicted as a Proposed Underground Electric Line on Appalachian Power Company drawing dated 07/16/2015 entitled, "Proposed Right of Way on the Property of Board of Supervisors of Roanoke County Virginia" attached hereto and made a part hereof as EXHIBIT "A". TOGETHER with the right to Appalachian, its successors and assigns, to construct, erect, install, place, operate, maintain, inspect, repair, renew, add to the number of, and relocate at will, THIS INSTRUMENT PREPARED BY AND UPON RECORDATION RETURN TO APPALACHIAN POWER COMPANY, P.O. BOX 2021, ROANOKE VIRGINIA 24022-2121 underground conduits, ducts, vaults, cables, wires, transformers, pedestals, risers, pads, fixtures and appurtenances (hereinafter called "Appalachian Facilities"), in, on, along, through, across and under the above referred to premises; the right to cut, trim and/or otherwise control any trees overhanging branches, shrubs, roots, brush, undergrowth, or other obstructions which may interfere with or endanger the safety or use of, Appalachian's Facilities; the right to disturb the surface of said premises and to excavate thereon; and the right of ingress and egress to and over said above referred to premises, for the purposes of exercising and enjoying the rights herein granted, and for doing anything necessary or useful or convenient in connection therewith; also the privilege of removing at any time any or all of said improvements erected or installed in, on, along, through, or across and under the above referred to premises as may be required by Appalachian for the full enjoyment or relinquishment of the rights herein granted. Appalachian agrees to restore and repair any damage to Grantor's property that may be caused by the construction, operation, or maintenance of said easement. The Grantor agrees that Appalachian will not be expected to restore the property to the identical original condition, but rather as near thereto as is practicable, and that the Grantor will cooperate with Appalachian in effectuating such restoration. APPALACHIAN will indemnify and save the Grantor harmless against any and all loss or damage, accidents, or injuries, to persons or property, whether of the Grantor or of any other persons or corporations arising in the manner from the negligence of Appalachian in the construction, operation, or maintenance, or failure to properly construct, operate, or maintain its facilities installed upon the right of way granted by this agreement. This instrument is executed by a duly authorized administrator of Roanoke County, Virginia, to signify approval by the Board of Supervisors of Roanoke County, Virginia, of the conveyance of the real estate conveyed herein pursuant to Ordinance No. adopted by the Board on the day of 12015. 2 TO HAVE AND TO HOLD the same unto Appalachian Power Company, its successors and assigns. It is agreed that this foregoing is the entire contract between the parties hereto, and that this written agreement is complete in all its terms and provisions. NOTICE TO LANDOWNER: You are conveying rights to a public service corporation. A public service corporation may have the right to obtain some or all of these rights through exercise of eminent domain. To the extent that any of the rights being conveyed are not subject to eminent domain, you have the right to choose not to convey those rights and you could not be compelled to do so. You have the right to negotiate compensation for any rights that you are voluntarily conveying. WITNESS the following signatures and seals. BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA 0 STATE OF VIRGINIA ) TO -WIT: COUNTY OF ROANOKE ) The foregoing instrument was acknowledged before me this day of , 2015, by NAME and on behalf of Roanoke County, Virginia. My Commission Expires: 3 WHO" NOTARY PUBLIC for GREEN HILL PARK PROPOSED UNDERGROUND EASEMENT, 13A,LLFIELE> GREEN HILL PARK ROANOKE,COUNTY, VIRGINIA T.D.665000 MAP SECTION 37800250134 APPALACHIAN POWER COMPANY CHARLESTON REGION, ROANOKE DISTRICT-ROANOKE COUNTY, VIRGINIA PROPOSED RIGHT OF WAY ON THE PROPERTY OF BOARD OF SUPERVISORS OF ROANOKE COUNTY VIRGINIA DFANIV H� BLC 07/16/2015 All' 11'a.e NONE DRAWING NO. EXHIBIT "A" AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER, TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AUTHORIZING THE GRANTING OF AN ELECTRIC UTILITY EASEMENT TO APPALACHIAN POWER (AEP) ON PROPERTY OWNED BY THE ROANOKE COUNTY BOARD OF SUPERVISORS (TAX MAP NO. 055.00-01-08.00-0000) FOR THE PURPOSE OF AN UNDERGROUND ELECTRIC POWER LINE TO GREEN HILL PARK BALL FIELD AT 3050 GREEN HILL PARK ROAD, CATAWBA MAGISTERIAL DISTRICT WHEREAS, Appalachian Power Company (AEP) requires a permanent utility easement for purpose of providing electrical service to the Green Hill Park Ball Field from an existing overhead electric line; and WHEREAS, the proposed utility easement will serve the interests of the public and is necessary for the public health, safety and welfare of the citizens of Roanoke County. THEREFORE, BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: That pursuant to the provisions of Section 18.04 of the Roanoke County Charter, the acquisition and disposition of real estate can be authorized only by ordinance. A first reading of this ordinance was held on September 8, 2015, and the second reading and public hearing of this ordinance was held on September 22, 2015. 2. That pursuant to the provisions of Section 16.01 of the Roanoke County Charter, the interest in real estate to be conveyed is hereby declared to be surplus, and is hereby made available for other public uses by conveyance to Appalachian Power Company for a utility easement. 3. That donation to Appalachian Power Company of a utility easement for purpose of an underground electric line, as shown on a plat titled "Proposed Right of Way on Property of Roanoke County Board of Supervisors", prepared by Appalachian Power Page 1 of 2 Company and dated 7/16/2015, is hereby authorized and approved. 4. That the County Administrator, or any Assistant County Administrator, is hereby authorized to execute such documents and take such further actions as may be necessary to accomplish this conveyance, all of which shall be on form approved by the County Attorney. 5. That this ordinance shall be effective on and from the date of its adoption. Page 2 of 2 ACTION NO. ITEM NO. H-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY. VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance to amend Chapter 23 "Stormwater Management" of the Roanoke County Code SUBMITTED BY: Tarek Moneir Deputy Director of Development Services APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The Roanoke County Board of Supervisors established this chapter on April 22, 2014, in order to comply with the Virginia Stormwater Management Act and State stormwater management regulations. At that time, Roanoke County became the local Virginia Stormwater Management Program (VSMP) authority. Some revisions and additions are needed in this County Ordinance in response to the Virginia Department of Environmental Quality (DEQ) review, and our experience in operating the program. Additionally, Roanoke County has been requested to become the VSMP Authority for the Town of Vinton (see attached letter from the town manager). Currently, through agreement between the County and Town of Vinton, Roanoke County Community Development staff review and approve all development and construction plans for stormwater management requirements, erosion and sediment control and building code compliance for Town of Vinton. The specific ordinance changes include: a) definitions and minor word changes requested by DEQ; b) extension of the County's VSMP authority to include the Town of Vinton; and c) addition of civil charges for violations of the ordinance to increase the County's enforcement flexibility. The most significant changes in Section 23-9 Enforcement and Penalties are contained in subsections 4-G, 4-H, & 4-I. Page 1 of 2 The proposed changes will: a) Comply with DEQs request to be fully compliant with the latest State Stormwater Management regulations; b) Relive the Town of Vinton of the burden of having State certified employees to run their VSMP program; and c) Provide additional information to assist the County in implementing its post - construction responsibilities (periodic inspection). County staff has reviewed this ordinance with the Roanoke Regional Home Builders Association and with the Board of Supervisors at a work session on August 25, 2015. This is the second reading of this ordinance; the first reading was held September 8, 2015. FISCAL IMPACT: None ALTERNATIVES: 1. Approve the attached amended ordinance of Chapter 23 Stormwater Management and other legal actions" of the Roanoke County Code. 2. Deny the amendment as presented STAFF RECOMMENDATION: Staff recommends alternative 1. Attachment: • Letter dated August 31, 2015 from Christopher S. Lawrence, Town Manager of Town of Vinton • Stormwater Management Proposed Ordinance Page 2 of 2 TOWN OF VINTON 0 311 S. POLLARD STREET VINTON, VIRGINIA 24179 PHONE: (540) 983-0607 V1111—R AV , o; FAX. (540) 983-0626 CHRISTOPHER S. LAWRENCE INTON EMAIL: rlawrenee@vintonva.gov TOWN MANAGER V [ 3l G " 1 % August 31, 2015 Mr. Thomas Gates, Administrator County of Roanoke 5204 Bernard Drive P.O. Box 29800 Roanoke, VA 24018 Dear Tom: This letter is written to serve as a formal request for Roanoke County to administer and become the authority for the Town of Vinton's Virginia Stormwater Management Program (VSMP). This includes, but is not limited to, administering and enforcing the VSMP regulations. The VSMP program requires the County to collect permit fees and remit the State's portion of the fee to the State; review stormwater plan submittals; submit project information and coordinate with the Department of Environmental Quality (DEQ) on issuance of permit coverage; perform periodic inspections of construction sites; perform enforcement activities when required; and maintain records and report to DEQ annually. Currently, through agreements between Roanoke County and Town of Vinton, our development and construction plans are being reviewed and approved by County personnel for stormwater management requirements, erosion and sediment control, and building code compliance. The Town recognizes the importance of working cooperatively with other jurisdictions in the Roanoke Valley to develop ordinances and regulations pertaining land use activities. Beginning in 2003, the Town of Vinton has worked cooperatively with staff from both Roanoke County and the City of Roanoke on the implementation of the stormwater management program. Mrs. Anita McMillan, the Town's Planning and Zoning Director, is currently in charge of the Town's VSMP and Municipal Separate Storm Sewers System (MS4) permit compliance and continues to actively participate on the regional storrmwater committee. I greatly appreciate your consideration of this request, and Town staff is looking forward to continuing to work cooperatively with your staff. Sincerely, Christoper. . Lawrence Town Manager Anita J. McMillan, Planning and Zoning Director AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AMENDING CHAPTER 23. STORMWATER MANAGEMENT OF THE ROANOKE COUNTY CODE WHEREAS, on April 22, 2014, the Board of Supervisors of Roanoke County adopted Ordinance 042214-12, which adopted a new Chapter 23. — Stormwater Management Ordinance for Roanoke County; and WHEREAS, the Department of Environmental Quality (DEQ) has reviewed this ordinance, and in consideration of recent legislative and regulatory changes, and is recommending that the Board consider adopting minor modifications to this Ordinance; and WHEREAS, the Federal Clean Water Act requires the U. S. Environmental Protection Agency (EPA) to enact regulations to permit and eliminate pollutants discharged into the nation's waterways; and WHEREAS, the EPA has required the States and in the Commonwealth of Virginia, the Department of Environmental Quality (DEQ) to enforce these regulations; and WHEREAS, Roanoke County through state -mandated programs is required to lessen the adverse impacts from stormwater runoff from land disturbing activities and from previous development through the local erosion and sediment control ordinance, the Virginia Stormwater Management Program (VSMP), Municipal Separate Storm Sewer System (MS4) Permit, and Total Maximum Daily Load (TMDL) Program; and Page 1 of 2 WHEREAS, the Commonwealth of Virginia has determined that to increase the effectiveness of these programs, the administration of the VSMP stormwater management requirements are being transferred to the localities; and WHEREAS, Roanoke County is the local VSMP authority, which will result in additional plan reviews, field inspections, educational activities, enforcement actions and coordination with DEQ; and WHEREAS, this ordinance satisfies the DEQ current requirements effective July 1,2015 -land WHEREAS, the first reading of this ordinance was held on September 8, 2015, and the second reading and public hearing was held on September 22, 2015. NOW THEREFORE BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That Chapter 23. Stormwater Management be, and hereby is, amended and readopted to read and provide as attached. 2. That the effective date of this ordinance is September 22, 2015. Page 2 of 2 Stormwater Management Ordinance from Chapter 23 of the County of Roanoke Code Table of Contents Introduction........................................................................................................... Section 23-1 General Provisions.......................................................................... 23-1.1 Title and Authority............................................................................. 23-1.2 Purpose............................................................................................. 23-1.3Applicability....................................................................................... 23-1.4 Compatibility with Other Requirements ............................................. 23-1.5 Severability........................................................................................ 23-1.6 Stormwater Management Technical Criteria for Regulated Land Disturbance --Activities ......................................................................... 23-1.7 Stormwater Management Technical Criteria for Regulated Land Disturbance Activities: Grandfathered Projects and Projects subjectto the Provisions of 9VAC25-870-47B......................................................... 23-1.8 Stormwater Management Design Manual ......................................... 23-1.9 County Right of Entry........................................................................ Section 23-2 Definitions........................................................................................ Section 23-3 Program Permit Procedures and Requirements .......................... 23-3.1 Permit Required................................................................................ 23-3.2 Permit Application Contents.............................................................. 23-3.3 Stormwater Pollution Prevention Plans ............................................. 23-3.4 Pollution Prevention Plans................................................................. 23-3.5 Stormwater Management Plans ........................................................ 23-3.6 Comprehensive Stormwater Management Plans and Regional Stormwater Management Facilities ................................................... 23-3.7 Stormwater Management Facility Maintenance Agreements ............ 23-3.8 Performance Securities..................................................................... 23-3.9 Fees.................................................................................................. 23-3.10 Permit Application Procedure.......................................................... Section 23-4 Exceptions to Stormwater Management Requirements .............. Section 23-5 Property Owner Responsibilities for Drainage Ways .................. Section 23-6 Construction Inspection................................................................. 23-6.1 Notice of Construction Commencement ............................................ 23-6.2 Periodic Construction Inspection....................................................... 23-6.3 Final Inspection and Record Documentation ..................................... Page 1 of W40 Section 23-7 Post Construction Inspection, Maintenance and Repair Of Stormwater Management Facilities ............................................ 23-7.1 Maintenance Inspections of Stormwater Management Facilities....... 23-7.2 Records of Inspection, Maintenance and Repair ............................... Section 23-8 Hearings and Appeals..................................................................... 23-8.1 Hearings............................................................................................ 23-8.2 Appea Is............................................................................................ . Section 23-9 Enforcement and Penalties............................................................ 23-9.1 Violations........................................................................................... 23-9.2 Notice of Violation............................................................................. 23-9.3 Stop Work Orders.............................................................................. 23-9.4 Civil and Criminal Penalties............................................................... 23-9.5 Restoration of Lands......................................................................... 23-9.6 Holds on Certificate of Occupancy .................................................... m �` IV Page 2 of 3740 Chapter 23 Stormwater Management Ordinance County of Roanoke, Virginia INTRODUCTION The County of Roanoke is home to a vast array of scenic natural resources, from the mountains that span our landscape to the streams that flow through our valleys. This picturesque environment has embraced generations of citizens while drawing in more newcomers every year. The continual increase in population aids in the growth and development of this area, improving jobs and enhancing economic stability. Yet, intensive development can degrade the beautiful natural resources that make the County so special. Inadequate management of stormwater runoff from land -disturbing activities and development in watersheds increases flood flows and velocities, erodes and/or silts stream channels, pollutes water, overloads existing drainage facilities, undermines floodplain management in downstream communities, reduces groundwater recharge, and threatens public safety. More specifically, surface water runoff can carry pollutants into receiving waters. The Roanoke River and many of its tributaries inside the County are listed as impaired waters by the Virginia Department of Environmental Quality (DEQ). Many future problems can be avoided through proper stormwater management, and the County is dedicated to preventing the damaging effects that uncontrolled stormwater may present. The lands and waters of Roanoke County are valuable natural resources that need to be protected. The County finds that it is in the public interest to establish a stormwater management program. Pursuant to Code § 62.1-44.15:27, this ordinance is part of an initiative to integrate the County of Roanoke's stormwater management requirements with the County of Roanoke's erosion and sediment control (Chapter 8.1) and floodplain management (Section 30-74) requirements into a unified stormwater program. The unified stormwater program is intended to facilitate the submission and approval of plans, issuance of permits, payment of fees, and coordination of inspection and enforcement activities into a more convenient and efficient manner for both the County of Roanoke and those responsible for compliance with these programs. Page 3 of 3740 SECTION 23-1 GENERAL PROVISIONS Section 23-1.1 TITLE AND AUTHORITY A. This ordinance shall be known as the "Stormwater Management Ordinance of the County of Roanoke, Virginia." B. Pursuant to § 62.1-44.15:27 of the Code of Virginia, the County of Roanoke hereby establishes a Virginia Stormwater Management Program (VSMP) for land -disturbing activities 'ithin the Town of Vinton, and adopts the applicable Regulations that specify standards and specifications for VSMPs promulgated by the State Water Control Board (State Board) for the purposes set out in Section 23-1.2 of this ordinance. The County of Roanoke hereby designates the Director of Community Development as the Administrator of its Virginia Stormwater Management Program. Section 23-1.2 PURPOSE The purpose of this ordinance is to promote and protect the general health, safety, and welfare of the citizens of the County and to protect property, state waters, stream channels, and other natural resources from the potential harm of unmanaged stormwater, and to establish requirements whereby stormwater is managed to protect water quality and downstream property owners. This ordinance provides the framework for the administration, implementation, and enforcement of the provisions of the Virginia Stormwater Management Act (VSMA) and delineates the procedures and requirements to be followed in connection with the permits issued by the Administrator. Section 23-1.3 APPLICABILITY A. Except as provided herein, no person may engage in any land -disturbing activity until a permit has been issued by the Administrator in accordance with the provisions of this ordinance. B. A stormwater management plan, or an agreement in lieu of a stormwater management plan, shall be reviewed and approved by the Administrator prior to permit issuance. C. Notwithstanding any other provisions of this ordinance, the following activities are exempt, unless otherwise required by federal law: Page 4 of 3740 Permitted surface or deep mining operations and projects, or oil and gas operations and projects conducted under the provisions of Title 45.1; Clearing of lands specifically for agricultural purposes and the management, tilling, planting, or harvesting of agricultural, horticultural, or forest crops, livestock feedlot operations, or as additionally set forth by the State Water Control Board in regulations, including engineering operations as follows: construction of terraces , terrace outlets, check dams, desilting basins, dikes, ponds, ditches, strip cropping, lister furrowing, contour cultivating, contour furrowing, land drainage, and land irrigation; however, this exception shall not apply to harvesting of forest crops unless the area on which harvesting occurs is reforested artificially or naturally in accordance with the provisions of Chapter 11 (§ 10.1-1100 et seq.) or is converted to bona fide agricultural or improved pasture use, as described in subsection B of § 10.1-1163 of Article 9 of Chapter 11 of Title 10.1 of the Code of Virginia; 3. Single-family residences separately built and disturbing less than one acre and not part of a larger common plan of development or sale, including additions or modifications to existing single-family residential structures; 4. Other land disturbing activities that disturb less than one acre of land area, except land disturbing activities that are part of a larger common plan of development or sale that is one acre or greater of disturbance; 5. Discharges to a sanitary sewer or a combined sewer system; 6. Activities under a state or federal reclamation program to return an abandoned property to an agricultural or open land use; 7. Routine maintenance that is performed to maintain the original line and grade, hydraulic capacity, or original construction of the project. The paving of an existing road with a compacted or impervious surface and reestablishment of existing associated ditches and shoulders shall be deemed routine maintenance performed in accordance with this subsection; and 8. Conducting land -disturbing activities in response to a public emergency where the related work requires immediate authorization to avoid imminent endangerment to human health or the environment. In such situations, the Administrator shall be advised of the disturbance within seven days of commencing the land -disturbing activity and compliance with the administrative requirements of subsection A is required within 30 days of commencing the land -disturbing activity. Page 5 of 3740 D The prnwosonns of this Chapter shall of be o pliEable within the limits l.�the Teem of h inters Chapter /, Commented [DMHl]: How do we transition for the County to be the Vinton VSMP Authority? Section 23-1.4 COMPATABILITY WITH OTHER REQUIREMENTS This ordinance is not intended to interfere with, abrogate, or annul any other ordinance, rule or regulation, stature, or other provision of law. The requirements of this ordinance should be considered minimum requirements, and where any provision of this ordinance imposes restrictions different from those imposed by any other ordinance, rule or regulation, or other provision of law, whichever provisions are more restrictive or impose higher protective standards for human health or the environment shall apply. Section 23-1.5 SEVERABILITY If the provisions of any article, section, subsection, paragraph, subdivision or clause of this ordinance shall be judged invalid by a court of competent jurisdiction, such order of judgment shall not affect or invalidate the remainder of any article, section, subsection, paragraph, subdivision or clause of this ordinance. Section 23-1.6 STORMWATER MANAGEMENT TECHNICAL CRITERIA FOR REGULATED LAND DISTURBING ACTIVITIES The County hereby adopts the technical criteria for regulated land -disturbing activities set forth in Part IIB of the Regulations, as amended, expressly to include 9VAC25-870- 62 [applicability]; 9VAC25-870-63 [water quality design criteria requirements]; 9VAC25- 870-65 [water quality compliance]; 9VAC25-870-66 [water quantity]; 9VAC25-870-69 [offsite compliance options]; 9VAC25-870-72 [design storms and hydrologic methods; 9VAC25-870-74 [stormwater harvesting]; 9VAC25-870-76 [linear development projects]; 9VAC25-870-85 [stormwater management impoundment structures or facilities]; and 9VAC25-870-92 [comprehensive stormwater management plans], which shall apply to all land disturbing activities regulated pursuant to this ordinance, except as expressly set forth in section 23-1.7 of this ordinance. Section 23-1.7 STORMWATER MANAGEMENT TECHNICAL CRITERIA FOR REGULATED LAND DISTURBING ACTIVITIES: GRANDFATHERED PROJECTS AND PROJECTS SUBJECT TO THE PROVISIONS OF 9VAC25-870-47B A. The County hereby adopts the technical criteria for regulated land -disturbing activities set forth in Part 11-C of the Regulations, as amended, expressly to include 9VAC25-870-93 [definitions]; 9VAC25-870-94 [applicability]; 9VAC25- 870-95 [general]; 9VAC25-870-96 [water quality]; 9VAC25-870-97 [stream channel erosion]; 9VAC25-870-98 [flooding]; and 9VAC25-870-99 [regional (watershed -wide) stormwater management plans], which shall only apply to all land disturbing activities regulated pursuant to this section. Page 6 of 3740 B. Any land -disturbing activity shall be considered grandfathered and shall be subject to the Part II C technical criteria of the Regulations, provided: A proffered or conditional zoning plan, zoning with a plan of development, preliminary or final subdivision plat, preliminary or final site plan, or any document determined by R o a n o k e C o u n t y the—!esa44 to be commented [DMH2]: Required byDEQ. equivalent thereto (i) was approved by Roanoke C o u n ty#4e—Ieeat+ty l prior to July 1, 2012, (ii) provided a layout as defined in 9VAC25-870- 10 and section 23-2, (iii) will comply with the Part II C technical criteria of the VSMP Regulation, and (iv) has not been subsequently modified or amended in a manner resulting in an increase in the amount of phosphorus leaving each point of discharge, and such that there is no increase in the volume or rate of runoff; A state permit has not been issued prior to July 1, 2014; and Land disturbance did not commence prior to July 1, 2014. C. County, state, and federal projects shall be considered grandfathered and shall be subject to the Part II C technical requirements of the Regulations, provided: There has been an obligation of county, state, or federal funding, in whole or in part, prior to July 1, 2012, or the Department has approved a stormwater management plan prior to July 1, 2012; A state permit has not been issued prior to July 1, 2014; and Land disturbance did not commence prior to July 1, 2014. D. Land disturbing activities grandfathered under subsections B and C of this section shall remain subject to the Part II C technical criteria of the Regulations for one additional state permit cycle. After such time, portions of the project not under construction shall become subject to the technical criteria in effect at that ti me. E. In cases where governmental bonding or public debt financing has been issued for a project prior to July 1, 2012, such project shall be subject to the technical requirements of the Part II C technical criteria of the Regulations. Land disturbing activities that obtain general permit coverage or commence land disturbance prior to July 1, 2014, shall be conducted in accordance with the Part II C technical criteria of the Regulations and Roanoke County's local stormwater management requirements that were in effect at the time of receiving general permit coverage or commencing land disturbance. Such projects shall remain subject to these requirements for an additional two general permit cycles, if general permit coverage is maintained. After that time, portions of the project, Page 7 of 3740 not under construction, shall become subject to the technical criteria in effect at that time. G. An operator may choose to decline grandfather status and to instead comply with the technical requirements of section 23-1.6 of this ordinance. Nothing in this section shall preclude an operator from constructing to a more stringent standard at his discretion. Section 23-1.8 STORMWATER MANAGEMENT DESIGN MANUAL A. The County will utilize the policies, criteria and information contained within the County Stormwater Management Design Manual for proper implementation of the requirements of this ordinance. B. The County Stormwater Management Design Manual may be updated and revised from time to time. The Administrator shall recommend any updates, supplements, or modifications of the County Stormwater Management Design Manual subject to the authorization and approval by the Board of Supervisors by resolution. Section 23-1.9 COUNTY RIGHT OF ENTRY A. The Administrator and/or duly authorized employees, agents, or representatives of the County, bearing proper credentials and identification, may, at any reasonable times and under reasonable circumstance, enter any establishment or upon any property, public or private, which has a VSMP permit or a maintenance agreement, for the purpose of enforcing this ordinance, including, but not limited to: 1. Obtaining information or conducting surveys or investigations; 2. Taking samples of discharges; 3. Inspecting monitoring equipment; 4. Inspecting and copying documents relevant to the enforcement of this ordinance; 5. Initiating or maintaining appropriate actions which are required by the permit conditions associated with a land -disturbing activity when a permittee, after proper notice, has failed to take acceptable action within the time specified; 6. Inspecting stormwater management facilities or other Best Management Practices (BMPsJ or to initiate or maintain appropriate actions which are required to restore proper functioning of a stormwater management facility or other BMP operation when a land Page 8 of 3740 owner, after proper notice, has failed to take acceptable action within the time specified; And such other items as may be deemed necessary for the enforcement of this ordinance. B. If the Administrator has cause to believe an activity regulated under this ordinance is occurring without a VSMP permit, or if the person in charge of the property refuses to allow the Administrator to enter in accordance with subsection A, then the Administrator may present sworn testimony to a magistrate or court of competent jurisdiction and request the issuance of an inspection warrant to enter the property for the purpose of making such inspection and investigation. The Administrator shall make a reasonable effort to obtain consent from the owner or person in charge of the property prior to seeking the issuance of an inspection warrant under this section. SECTION 23-2 DEFINITIONS In addition to the definitions set forth in 9VAC25-870-10 of the Virginia Stormwater Management Regulations, as amended, which are expressly adopted and incorporated herein by reference, the following words and terms used in this ordinance have the following meanings, unless otherwise specified herein. Where definitions differ, those incorporated herein shall have precedence. "Administrator" means the VSMP authority responsible for administering the VSMP on behalf of the County of Roanoke. The Administrator shall be the Director of Community Development and any duly authorized agent of the Director of Community Development, or the person designated by the County Administrator to administer this ordinance on behalf of the County. "Agreement in lieu of a Stormwater Management Plan" means a contract between the VSMP authority and the owner or permittee that specifies methods that shall be implemented to comply with the requirements of a VSMP for the construction of a single-family residence; such contract may be executed by the VSMP authority in lieu of a stormwater management plan. "Applicant" means any person submitting an application for a permit or requesting issuance of a permit under this Ordinance. "Best Management Practice or BMP" means schedules of activities, prohibitions of practices, including both e -structural or nonstructural practices, maintenance procedures, and other management practices to prevent or reduce the pollution of surface waters and groundwater systems from the impacts of land -disturbing activities. Page 9 of 3740 "Clean Water Act or CWA" means the federal Clean Water Act (33 United States Code 1251 et seq.), formerly referred to as the Federal Water Pollution Control Act or Federal Water Pollution Control Act Amendments of 1972, Public Law 92-500, as amended by Public Law 95-217, Public Law 95-576, Public Law 96-483, and Public Law 97-117, or any subsequent revisions thereto. "Common plan of development or sale" means a contiguous area where separate and distinct construction activities may be taking place at different times on different schedules. "Control measure" means any best management practice or other method used to prevent or reduce the discharge of pollutants to waters. "County" means the County of Roanoke, Virginia. "Department" means the Department of Environmental Quality "Development" means land disturbance and the resulting landform associated with the construction of residential, commercial, industrial, institutional, recreation, transportation or utility facilities or structures or the clearing of land for non-agricultural or non- silvicultural purposes. "Executed Development Agreements" means documents that are executed by the applicant and County that implements the various sureties. "Fee in lieu" means a payment of money to the County for the use of a regional stormwater management facility in place of meeting all or part of the stormwater performance standards required by this Ordinance on the site. "General permit" means the state permit titled GENERAL PERMIT FOR DISCHARGES OF STORMWATER FROM CONSTRUCTION ACTIVITIES found in Part XIV (9VAC25-880-1 et seq.) of the Regulations authorizing a category of discharges under the CWA and the Act within a geographical area of the Commonwealth of Virginia. "Illicit discharge" means any discharge to a municipal separate storm sewer that is not composed entirely of stormwater, except discharges pursuant to a VPDES or VSMP permit (other than the VSMP permit for discharges from the municipal separate storm sewer), discharges resulting from firefighting activities, and discharges identified by and in compliance with 9VAC25-870-400 D 2 c (3). "Land disturbance" or "Land -disturbing activity" means a manmade change to the land surface that potentially changes its runoff characteristics including any clearing, grading, or excavation, except that the term shall not include those exemptions specified in Section 23-1.3 of this Ordinance. Page 10 of X40 Commented [DMH3]: Correction, required by DEQ. "Layout" means a conceptual drawing sufficient to provide for the specified stormwater management facilities required at the time of approval. "Minor modification" means an amendment to an existing general permit before its expiration not requiring extensive review and evaluation including, but not limited to, changes in EPA promulgated test protocols, increasing monitoring frequency requirements, changes in sampling locations, and changes to compliance dates within the overall compliance schedules. A minor general permit modification or amendment does not substantially alter permit conditions, substantially increase or decrease the amount of surface water impacts, increase the size of the operation, or reduce the capacity of the facility to protect human health or the environment. "Municipal separate storm sewer" means a conveyance or system of conveyances otherwise known as a municipal separate storm sewer system or "MS4," including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man- made channels, or storm drains: 1. Owned or operated by Roanoke County; 2. Designed or used for collecting or conveying stormwater; 3. That is not a combined sewer; and 4. That is not part of a publicly owned treatment works. "Municipal separate storm sewer system" or "MS4" means all municipal separate storm sewers that are located within the portion of the County that is identified as "urbanized" by the U.S. Bureau of the Census in the latest Decennial Census. "Municipal Separate Storm Sewer Management Program" or "MS4 Program" means a management program covering the duration of a permit for a municipal separate storm sewer system that includes a comprehensive planning process that involves public participation and intergovernmental coordination, to reduce the discharge of pollutants to the maximum extent practicable, to protect water quality, and to satisfy the appropriate water quality requirements of the CWA and regulations and the Act and attendant regulations, using management practices, control techniques, and system design and engineering methods, and such other provisions that are appropriate. "Off-site facility" means a stormwater management measure located outside the subject property boundary described in the permit application for land -disturbing activity. "Operator" means the owner or operator of any facility or activity subject to regulation under this Ordinance. "Permit or VSMP Authority Permit" means an approval to conduct a land disturbing activity issued by the Administrator for the initiation of a land -disturbing activity, in accordance with this Ordinance, which may only be issued after evidence of general permit coverage has been provided by the Department. Page 11 of X40 "Permittee" means the person to whom the VSMP Authority permit is issued "Person" means any individual, corporation, partnership, firm, association, joint venture, public or private or municipal corporation, trust, estate, commission, board, public or private institution, utility, cooperative, county, city, town or other political subdivision of the Commonwealth, any interstate or governmental body, or any other legal entity, or any agent or employee of any such person. "Regional stormwater management facility" or "Regional facility" means a facility or series of facilities designed to control some or all of the adverse impacts from stormwater runoff from two or more parcels or lots, located in the same watershed, although only portions of the area may experience development. "Regulations" means the Virginia Stormwater Management Program (VSMP) ReFFRO Regulations, 9VAC25-870-10 et seq., as amended. "Site" means the land or water area where any facility or land -disturbing activity is physically located or conducted, including adjacent land used or preserved in connection with the facility or land -disturbing activity. "State" means the Commonwealth of Virginia. "State Board" means the State Water Control Board. "State Permit" means an approval to conduct a land -disturbing activity issued by the State Board in the form of a state stormwater individual permit or coverage issued under a state general permit or an approval issued by the State Board for stormwater discharges from an MS4. Under these state permits, the Commonwealth imposes and enforces requirements pursuant to the federal Clean Water Act and regulations, the Virginia Stormwater Management Act and the Regulations. "State Water Control Law" means Chapter 3.1 (§62.1-44.2 et seq.) of Title 62.1 of the Code of Virginia (1950), as amended. "State waters" means all water, on the surface and under the ground, wholly or partially within or bordering the Commonwealth or within its jurisdiction, including wetlands. "Stormwater" means precipitation that is discharged across the land surface or through conveyances to one or more waterways and that may include stormwater runoff, snow melt runoff, and surface runoff and drainage. "Stormwater facility maintenance agreement" means a legally binding agreement between the owner of a property and the County regarding long-term maintenance of stormwater management facilities. Page 12 of X40 "Stormwater Management Facility" or "SWMF" means a device that controls stormwater runoff and changes the characteristics of that runoff including, but not limited to, the volume, rate of flow, quality, the period of release, or the velocity of flow. "Stormwater management plan" means a document(s) containing material - commented [DMH4]: General cleanup to match state describing methods for complying with the requirements of Section 23-3.5 of this definition. Ordinance. Formatted: Indent: First line: 0" "Stormwater Pollution Prevention Plan" or "SWPPP" means a document that is prepared in accordance with good engineering practices and that identifies potential sources of pollutants that may reasonably be expected to affect the quality of stormwater discharges from the construction site, and otherwise meets the requirements of this Ordinance. In addition, the document shall identify and require the implementation of control measures, and shall include, but not be limited to. the inclusion of, or the incorporation by reference of, an approved erosion and sediment control plan, an approved stormwater management plan, and a pollution prevention plan. "Subdivision" means the division of a parcel of land into two (2) or more parcels of any size by the establishment of new beLlRdaries boundary lines or by the adjustment, relocation, or vacation of existing boundary lines, for the purpose whether immediate or future, of transfer of ownership or building development. A subdivision includes all changes in street or lot lines, and any portion of any such subdivision previously recorded in which building development or street creation occurs, or is required, subsequent to such recordation. The transfer of ownership of land to the Commonwealth of Virginia or a political subdivision thereof and the division of lands by court order or decree shall not be deemed a subdivision as otherwise herein defined. "Total Maximum Daily Load" or "TMDL" means the sum of the individual waste -load allocations for point sources, load allocations for nonpoint sources, natural background loading and a margin of safety. TMDLs can be expressed in terms of either mass per time, toxicity, or other appropriate measures. The TMDL process provides for point versus nonpoint source trade-offs. "Town" means the incorporated Town of Vinton. "Virginia Stormwater Management Act" or "Act" means Article 2.3 (§ 62.1-44.15:24 et seq.) of Chapter3.1 of Title 62.1 of the Code of Virginia. "Virginia Stormwater BMP Clearinghouse website" means a website that contains detailed design standards and specifications for control measures that may be used in Virginia to comply with the requirements of the Virginia Stormwater Management Act and associated regulations. "Virginia Stormwater Management Program" or "VSMP" means a—the program approved by the State Board after September 13, 2011, that has been established by a Page 13 of X40 aesal+t 'Roanoke County to manage the quality and quantity of runoff resulting Formatted: Indent: Left: 0.07°, Right: 0.08", Space from land -disturbing activities and shall include such items as teeal— my Before: 0 pt ordinances, rules, permit requirements, annual standards and specifications, policies and guidelines, technical materials, and requirements for plan review, inspection, and enforcement, where authorized in this Ordinance, and evaluation consistent with the requirements of this Ordinance and associated regulations. "Virginia Stormwater Management Program authority" or VSMP authority" means an authority approved by the State Board after September 13, 2011, to operate a Virginia Stormwater Management Program. For the purpose of this Ordinance, Roanoke County is the VSMP Authority Commented [DMHSI: Explicitly stating that Roanoke County is the VSMP authority for the Town of Vinton. SECTION 23-3 PROGRAM PERMIT PROCEDURES AND REQUIREMENTS Section 23-3.1 PERMIT REQUIRED A. No grading, building, or other local permit will be issued for a property until a VSMP authority permit has been issued by the Administrator, unless the activity is specifically exempted from VSMP permitting by this Ordinance. B. No VSMP authority permit will be issued unless and until the permit application and attendant materials and supporting documentation demonstrate that all land clearing, construction, disturbance, land development and drainage will be done according to the requirements of this Ordinance, including an approved erosion and sediment control plan; and an approved stormwater management plan or an executed agreement in lieu of a stormwater management plan. C. No VSMP authority permit will be issued without the general permit registration statement except that construction activity involving a single-family detached residential structure, within or outside of a common plan of development or sale does not require a permit registration statement. Construction activities involving a single-family detached residential structure, within or outside of a common plan of development or sale, shall comply with the requirements of the General Permit. Section 23-3.2 PERMIT APPLICATION CONTENTS A. Unless specifically exempted by this Ordinance, any land–owner or operator desiring a permit for a land disturbance activity shall submit to the County a permit application on a form provided by the County for that purpose. Permit applications shall comply with the requirements contained within the County Stormwater Management Design Manual that is available from the Department of Community Development.A#ise Page 14 of X40 B. No VSMP authority permit shall be issued by the Administrator, until the following items have been submitted to and approved by the Administrator as prescribed herein. 1. A permit application that includes a fully -executed general permit registration statement, except that construction activity involving a single- family detached residential structure, within or outside of a common plan of development or sale does not require a permit registration statement; 2. An erosion and sediment control plan approved in accordance with the County Erosion and Sediment Control Ordinance [Chapter 8.1]; 3. A stormwater management plan, or agreement in lieu of a stormwater management plan, that meets the requirements of Section 23-3.5; 4. Maintenance agreement in accordance with Section 23-3.7; 5. Performance bonds in accordance with Section 23-3.8; 6. Fees in accordance with Section 23-3.9; and, 7. Executed Development Agreements. C. Pursuant to § 62.1-44.15:40 of the Code of Virginia, the Administrator may require every VSMP authority permit applicant or permittee, or any such person subject to VSMP authority permit requirements under this Ordinance, to furnish, when requested, such application materials, plans, specifications, and other pertinent information as may be necessary to determine the effect of the permittee's discharge on the quality of state waters, or such other information as may be necessary to accomplish the purposes of this Ordinance. Section 23-3.3 STORMWATER POLLUTION PREVENTION PLANS A. The Stormwater Pollution Prevention Plan (SWPPP) required by the general permit, shall comply with the requirements set forth in 9VAC25-870-54 and shall also comply with the requirements and general information set forth in Section 9VAC25-880-70, Section II [stormwater pollution prevention plan] of the general permit. The SWPPP shall include: 1. An approved erosion and sediment control plan; 2. An approved stormwater management plan, or agreement in lieu of a stormwater management plan; 3. A pollution prevention plan for regulated land disturbing activities; and 4. Descriptionof any additional control measures necessary to addressaTMDL. Page 15 of X40 B. The SWPPP shall be amended, by the operator, whenever there is a change in design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to state waters, which is not addressed by the existing SWPPP. C. The SWPPP shall be maintained at a central location onsite. If an onsite location is unavailable, notice of the SWPPP's location must be posted near the main entrance at the construction site. Operators shall make the SWPPP available for public and County review in accordance with Section II of the general permit, either electronically or in hard copy. Section 23-3.4 POLLUTION PREVENTION PLANS A. A Pollution Prevention Plan, required by 9VAC25-870-56, shall be developed, implemented, and updated as necessary and must detail the design, installation, implementation, and maintenance of effective pollution prevention measures to minimize the discharge of pollutants. B. At a minimum, such measures must be designed, installed, implemented, and maintained to: 1. Minimize the discharge of pollutants from equipment and vehicle washing, wheel wash water, and other wash waters. Wash waters must be treated in a sediment basin or alternative control that provides equivalent or better treatment prior to discharge; 2. Minimize the exposure of all materials, including, but not limited to building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater; and Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures. C. The pollution prevention plan shall include effective best management practices torop hibit the following discharges: 1. Wastewater from washout of concrete, unless managed by an appropriate control; 2. Wastewater from washout and cleanout of stucco, paint, form release oils; curing compounds, and other construction materials; 3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; and 4. Soaps or solvents used in vehicle and equipment washing. Page 16 of X40 D. The pollution prevention plan shall prohibit discharges from dewatering activities, including discharges from dewatering of trenches and excavations, unless managed by appropriate controls. Section 23-3.5 STORMWATER MANAGEMENT PLANS A. No application for land -disturbing activity will be approved unless it includes a stormwater management plan or agreement in lieu of a stormwater management plan, as required by this Ordinance, detailing how runoff and associated water quality impacts resulting from the activity will be controlled or managed. B. Submittal, review, approval, and resubmittal of stormwater management plans, and agreements in lieu of stormwater management plans shall comply with the requirements set forth in this Ordinance and the County Stormwater Management Design Manual. C. The stormwater management plan shall apply the stormwater management technical criteria set forth in Section 23-1.6 of this Ordinance to the entire common plan of development or saleland .d'c+""h"'g I e#y4�Individual Commented [DMH6]: Required by DEQ lots in new residential, commercial, or industrial developments develo : shall not be considered to be separate land - disturbing activities. D. A stormwater management plan that is approved for a residential, commercial, or industrial subdivision shall govern the development of the individual parcels, including those parcels developed under subsequent owners E. The stormwater management plan must consider all sources of surface runoff and all sources of subsurface and groundwater flows converted to surface runoff. F. If an operator intends to meet the water quality and/or quantity requirements set forth in 9VAC25-870-63 or 9VAC25-870-66 through the use of off-site compliance options, where applicable, then a letter of availability from the off-site provider must be included. Approved off-site options must achieve the necessary nutrient reductions prior to the commencement of the applicant's land -disturbing activity except as otherwise allowed by §62.1-44.15:35 of the Code of Virginia. G. Elements of the stormwater management plans that include activities regulated under Chapter 4 (§54.1-400 et seq.) of Title 54.1 of the Code of Virginia shall be appropriately sealed and signed by a professional registered in the Commonwealth of Virginia pursuant to Article 1 (§ 54.1400 et seq.) of Chapter 4 of Title 54.1 of the Code of Virginia. H. Where a stormwater management plan is required, a construction record drawing for permanent stormwater management facilities shall be submitted to the Administrator and approved prior to the release of bonds. The construction record drawing shall be appropriately sealed and signed by a professional Page 17 of 4740 registered in the Commonwealth, certifying that the stormwater management Page 18 of X40 facilities have been constructed in compliance with the approved plan. Stormwater management facilities include all storm drain structures, storm drain pipes, culverts, open channels, BMPs, and all other facilities used to convey, control, or treat stormwater runoff. The stormwater management plan shall include the following information: 1. Information on the type and location of stormwater discharges; information on the features to which stormwater is being discharged including surface waters or karst features, if present, and the pre -development and post - development drainage areas; 2. Contact information including the name, address, and telephone number of the owner and the tax reference number and parcel number of the property or properties affected; 3. A narrative that includes a description of current site conditions and final site conditions or if _ owe( .ranoke Cour,,. and documented during the review process that addresses the current and final site conditions ; Commented [DMH7]: Required by DEQ. 4. A general description of the proposed stormwater management facilities and the mechanism through which the facilities will be operated and maintained after construction is complete; 5. Information on the proposed stormwater management facilities, including: (i) The type of facilities; (ii) Location, including geographic coordinates; (iii) Acres treated; and (iv) Surface area, volume, depth, and width of facilities, if applicable; (v) The surface waters or karst features, if present, into which the facility will discharge ;and (vi) The Hydrologic Unit Code (HUC) into which the facilities drain. Hydrologic and hydraulic computations, including runoff characteristics; Documentation and calculations verifying compliance with the water quality and quantity requirements G E c 2u v. Commented [DMHs]: Required by DEQ. A map or maps of the site that depicts the topography of the site and includes: (i) All contributing drainage areas; (ii) Existing streams, ponds, culverts, ditches, wetlands, other water bodies, and floodplains; (iii) Soil types, geologic formations if karst features are present in the Page 19 of 37 area, forest cover, and other vegetative areas; (iv) Current land use, including existing structures, roads, and locations of known utilities and easements; (v) Sufficient information (such as grades ) on adjoining parcels to assess the impacts of stormwater from the site on these parcels; (vi) The limits of clearing and grading, and the proposed drainage patterns on the site; (vii) Proposed buildings, roads, parking areas, utilities, and stormwater management facilities; and (viii) Proposed land use with tabulation of the percentage of surface area to be adapted to various uses, including but not limited to planned locations of utilities, roads, and easements. An agreement in lieu of stormwater management plan shall conform to the Regulations and the County Stormwater Management Design Manual. Section 23-3.6 COMPREHENSIVE STORMWATER MANAGEMENT PLANS AND REGIONAL STORMWATER MANAGEMENT FACILITIES A. The County may develop comprehensive stormwater management plans in accordance with 9VAC25-870-92 as a means to more effectively and efficiently address water quality objectives, quantity objectives, or both; through the implementation of regional stormwater management facilities. B. Once a comprehensive stormwater management plan is adopted by the County and approved by the Director of the Virginia Department of Environmental Quality, it is enforceable under this Ordinance. C. Stormwater management plans for land disturbing activities located in areas that have a comprehensive stormwater management plan, adopted by the County, and approved by the Director of the Virginia Department of Environmental Quality, shall comply with the requirements of the comprehensive stormwater management plan. If a proposed regulated land -disturbing activity is located in a watershed that has a regional stormwater management facility currently constructed, and if the regional stormwater management facility is in accordance with a comprehensive stormwater management plan, the County shall have the option to require the payment of a fee -in -lieu of providing a portion or all of the proposed regulated land -disturbing activities stormwater management requirements. The fee -in -lieu shall be based on the reasonable proportion of stormwater impacts from the proposed regulated land -disturbing activity compared to the total stormwater impacts that the regional stormwater management facility is designed to mitigate, multiplied by the total estimated project costs. The reasonable proportion of project costs shall be solely determined by the County. Project costs include, but are not limited to, the costs of land, professional services for investigations, Page 20 of 37 studies, design, environmental permitting, surveying, construction phase Page 21 of 37 services, legal services, and construction. Project costs may also include County staff costs for project development, design, construction, permitting, oversight, or other project activities; and other direct costs. Project costs shall also include the present value of the estimated operation and maintenance costs for the next 20_years, if the County is responsible for the regional stormwater management facility's operation and maintenance. D. The County and any other party (ies) may mutually agree to share the costs of a regional stormwater management facility, in the absence of a comprehensive stormwater management plan. The fee -in -lieu shall be based on project costs apportioned to each party in reasonable proportion of each party's contribution to the total stormwater impacts that the regional stormwater management facility is designed to mitigate, as mutually negotiated. Section 23-3.7 STORMWATER MANAGEMENT FACILITY MAINTENANCE AGREEMENTS A. Maintenance of stormwater management facilities shall be ensured through the creation of a formal maintenance agreement that is executed by the property owner and submitted prior to plan approval and recorded by the County in the County land records prior to permit termination. The maintenance agreement shall be binding on all subsequent property owners. B. The property owner of the site shall execute an access easement agreement, prior to plan approval, to provide for access to stormwater management facilities at reasonable times for periodic inspection by the County, or their contractor or agent, to ensure that the facility is maintained in proper working condition to meet design standards and any other provisions established by this Ordinance. The easement agreement shall be recorded in the County land records by the County and it shall be binding on all subsequent property owners. C. A stormwater management facility that serves more than one parcel shall be located on its own, separate parcel. The land owners of each parcel served by the stormwater management facility shall be jointly and severally responsible for the maintenance of the stormwater management facility through a formal maintenance agreement with the County. D. Responsibility for the operation and maintenance of stormwater management facilities, unless assumed by a governmental agency, shall remain with the property owner and shall pass to any successor or owner. If portions of the land are to be sold, legally binding arrangements, acceptable to the County, shall be made to pass the responsibility to successors in title. These arrangements shall designate for each land owner, governmental agency, or other legally established entity to be permanently responsible for maintenance. Page 22 of 37 E. As part of the maintenance agreement, a schedule shall be developed identifying anticipated routine maintenance, to be performed by the property owner, needed for proper function of the stormwater management facility. The maintenance agreement shall also include a schedule for periodic inspections, to be performed by the property owner, to ensure proper performance of the facility between scheduled routine maintenance activities, and it shall require repairs when needed for proper function of the SWMF. The maintenance agreement shall require that the property owner document routine maintenance, repair, and periodic inspection activities, maintain said documentation for five (5)_years, and submit said documentation to the County, if requested. The maintenance agreement shall also include "failure to maintain" provisions. In the event that maintenance or repair is neglected, or the stormwater management facility becomes a danger to public health, safety, or the environment, the County reserves the authority to perform the necessary maintenance or repair work and to recover the costs from the property owner. Nothing in this Ordinance shall be construed to mean that the County has the responsibility to maintain privately -owned SWMFs. G. Prior to the release of the performance security or bond, the developer shall either (1) transfer the maintenance responsibilities of the stormwater management facilities to a Home Owners Association or (2) provide the County with a maintenance security. 1. Requirements for Transfer of Maintenance Responsibilities to the Home Owners Association (HOA) i. Submission of acceptable record drawings. ii. Acceptable final inspection of the stormwater management facility by the County. iii. Transfer of the necessary property to the HOA. iv. Organize and hold a meeting attended by the developer, the County and members of the HOA. Provide evidence to the County that each member of the HOA was provided prior notice of the meeting. The meeting shall be held at a place and time convenient for members of the HOA. v. Provide a copy of the recorded documents establishing the Home Owners Association to the County. vi. Provide the County with evidence that the Home Owners Association is funded. Minimum funding shall be based on the following schedule: 1-20 lots = $1,000 21-50 lots = $1,500 51 and over = $1500 + $30 per lot over 50 Page 23 of 37 2. Requirements for Posting Maintenance Security. The County shall require a maintenance guaranty in the amount of twenty (20%) percent of the construction costs of the stormwater management facility. The maintenance security shall contain forfeiture provisions for failure, after proper notice, to complete work within the time specified, or to initiate or maintain appropriate actions which may be required of the permittee in accordance with the approved stormwater management plan. If the County takes such action upon such failure by the permittee, the County may collect from the permittee the difference should the amount of the reasonable cost of such action exceed the amount of the security held. The maintenance agreement and security will be the responsibility of the permittee or owner until such time as the permittee or owner provides the County with the necessary requirements for Transfer of Maintenance Responsibilities to the Home Owners Association as outlined above in (1). R At the discretion of the Administrator, a formal maintenance agreement and access easement agreement maVPee4 not be required for stormwater management facilities designed to treat stormwater runoff primarily from an individual single-family residential lot on which they are located, provided it is demonstrated to the satisfaction of the Administrator that future maintenance of such facilities will be addressed through an enforceable mechanism at the discretion of the Administratieeor. +� I. If a formal maintenance agreement and access easement agreement is not required as described in paragraph H above, the Administrator shall develop a strategy for addressing maintenance of stormwater management facilities designed to treat stormwater runoff primarily from an individual single- family residential lot on which they are located. Such a strategy may include periodic inspections, homeowner outreach and education, or other method targeted at promoting the long-term maintenance of such facilities. Such facilities shall not be subject to the requirement for an inspection to be conducted by the Administrator. A. The County may, at its discretion, require the submittal of a performance security or bond with surety, cash escrow, letter of credit, or other acceptable legal arrangement, all of which shall be in a form approved by the County, prior to plan approval, in order to ensure that the stormwater practices are installed by the permittee, as required by the approved stormwater management plan. B. Until July 1, 2017, the amount of the performance security shall be the total Page 24 of 37 Formatted: Not Expanded by / Condensed by Formatted: Indent: Left: 0.08", Hanging: 0.5", No bullets or numbering Commented [DMH9]: Required to address use of agreements in lieu for single farnily residential construction. estimated construction cost of the storm drainage systems and stormwater management facilities approved under the permit, plus 10% contingency. After July 1, 2017, the amount of the performance security shall be the total estimated construction cost of the storm drainage systems and stormwater management facilities approved under the permit, plus 25% contingency. The amount of contingency is in accordance with Title 15.2, Chapter 22, Article 41 (§ 15.2-2241 et seq.) of the Code of Virginia (1950), as amended. C. The performance security shall contain forfeiture provisions for failure, after proper notice, to complete work within the time specified, or to initiate or maintain appropriate actions which may be required of the permittee in accordance with the approved stormwater management plan. D. If the County takes such action upon such failure by the permittee, the County may collect from the permittee the difference should the amount of the reasonable cost of such action exceed the amount of the security held. E. Within 60 days of the completion of the requirements of the permit conditions, including request for permit termination by the operator, such bond, cash escrow, letter of credit, or other legal arrangement, or the unexpended or unobligated portion thereof, will be refunded to the permittee or terminated. Section 23-3.9 FEES A. Fees to cover costs associated with implementation of a VSMP related to land disturbing activities and issuance of general permit coverage and VSMP authority permits shall be imposed in accordance with the appropriate fee schedule established, updated and revised from time to time by the County Board of Supervisors by resolution. VSMP costs include County costs associated with stormwater management plan review, VSMP registration statement review, permit issuance, state -coverage verification, inspections, reporting, and compliance activities associated with land -disturbing activities, as well as state program oversight costs. B. Fees for providing coverage under the General Permit for Discharges of Stormwater from Construction Activities shall be imposed in accordance with the appropriate fee schedule established, updated and revised from time to time by the County Board of Supervisors by resolution. Fifty percent (50%) of the total fee shall be paid by the applicant at the time that a stormwater management plan, or agreement in lieu of a stormwater management plan, is submitted for review. The remaining total fee is to be paid by the applicant prior to issuance of coverage under the General Permit for Discharges of Stormwater from Construction Activities. C. When a site or sites has been purchased for development within a previously permitted common plan of development or sale, the applicant shall be subject to fees in accordance with the disturbed acreage of their site or sites according to Page 25 of 37 the fee schedule established, revised and updated from time to time by the County Board of Supervisors by resolution. D. Fees for the modification or transfer of registration statements from the general permit issued by the State Board shall be imposed in accordance with the fee schedule established, revised and updated from time to time by the County Board of Supervisors by resolution. If the permit modifications result in changes to stormwater management plans that require additional review by the County, such reviews shall be subject to the fee schedule established by the County Board of Supervisors, as amended. The fee assessed shall be based on the total disturbed acreage of the site. In addition to the general permit modification fee, modifications resulting in an increase in total disturbed acreage shall pay the difference in the initial permit fee paid and the permit fee that would have applied for the total disturbed acreage in accordance with the fee schedule established, revised and updated from time to time by the County Board of Supervisors by resolution. E. General permit maintenance fees: Annual permit maintenance fees required by 9VAC25-870-830 shall be imposed in accordance with the fee schedule established, revised and updated from time to time by the County Board of Supervisors by resolution, including fees imposed on expired general permits that have been administratively continued. With respect to the general permit, these fees shall apply until the permit coverage is terminated. General permit coverage maintenance fees, for permits issued in a previous calendar year, shall be paid by April 1st of each year that it is in effect. No permit will be reissued or automatically continued without payment of the required fee. General permit coverage maintenance fees shall be applied until a Notice of Termination is effective. E. Persons whose coverage under the general permit has been revoked shall apply to the Department for an Individual Permit for Discharges of Stormwater from Construction Activities. No permit application fees will be assessed to: 1) Permittees who request minor modifications to permits as defined in Section 23-2 of this Ordinance. Permit modifications at the request of the permittee resulting in changes to stormwater management plans that require additional review by the Administrator shall not be exempt pursuant to this section. 2) Permittees whose permits are modified or amended at the initiative of the Department or Administrator, excluding errors in the registration statement identified by the Administrator or errors related to the acreage of the site. G. All incomplete payments will be deemed as nonpayments, and the applicant shall be notified of any incomplete payments. Interest may be charged for late payments at the underpayment rate set forth in §58.1-15 of the Code of Virginia and is calculated on a monthly basis at the applicable periodic rate. A 10% late Page 26 of 37 payment fee shall be charged to any delinquent (over 90 days past due) account. The County shall be entitled to all remedies available under the Code of Virginia in collecting any past due amount. H. In addition to the fees contained on the fee schedule established, revised and updated by the County Board of Supervisors by resolution the County may collect convenience fees associated with processing credit card payments. Section 23-3.10 PERMIT APPLICATION PROCEDURE A. Permit applications and the stormwater management plan, or agreement in lieu of a stormwater management plan, shall include all of the information required by this Ordinance and the County Stormwater Management Design Manual. B. No VSMP authority permit shall be issued until the maintenance agreement required in section 23-3.7 is approved, performance securities required in section 23-3.8 have been submitted and accepted, and fees required to be paid, pursuant to section 23-3.9, are received. C. All applications will be processed in accordance with procedures set forth below and in the County Stormwater Management Design Manual. 1. The Administrator shall determine the completeness of a plan in accordance with section 23-3.2 of this Ordinance and shall notify the applicant, in writing, of such determination, within 15 calendar days of receipt. If the plan is deemed to be incomplete, the above written notification will contain the reasons the plan is deemed incomplete. 2. The Administrator shall have an additional 60 calendar days from the date of the communication of completeness to review the plan, except that if a determination of completeness is not made within the time prescribed above, then plan shall be deemed complete and the Administrator shall have 60 calendar days from the date of submission to review the plan. 3. The Administrator shall review any plan that has been previously disapproved, within 45 calendar days of the date of resubmission. 4. During the review period, the plan shall be approved or disapproved and the decision communicated in writing to the applicant or his/her designated agent. If the plan is not approved, the reasons for not approving the plan shall be provided in writing. Approval or denial shall be based on the plan's compliance with the requirements of this Ordinance. 5. If a plan meeting all requirements of this Ordinance is submitted and no action is taken within the time provided above, the plan shall be deemed approved. Page 27 of 37 D. Approved stormwater management plans may be modified, as follows: 1. Modification to an approved stormwater management plan shall be allowed only after review and written approval by the Administrator. The Administrator shall have 60 calendar days to respond in writing either approving or disapproving such request. 2. The Administrator may require that an approved stormwater management plan be amended, within a time prescribed by the Administrator, to address any deficiencies noted during inspection. E. The Administrator shall require the submission of a construction record drawing for permanent stormwater management facilities. SECTION 23-4 EXCEPTIONS TO STORMWATER MANAGEMENT REQUIREMENTS A. The Administrator may grant exceptions to the technical requirements of Part II B or Part II C of the Regulations, provided that (i) the exception is the minimum necessary to afford relief, (ii) reasonable and appropriate conditions are imposed so that the intent of the Act and this Ordinance are preserved, (iii) granting the exception will not confer any special privileges that are denied in other similar circumstances, and (iv) exception requests are not based upon conditions or circumstances that are self-imposed or self-created. Economic hardship alone is not sufficient reason to grant an exception from the requirements of this Ordinance. Exceptions to the requirement that the land -disturbing activity obtain the required VSMP authority permit shall not be given by the Administrator, nor shall the Administrator approve the use of a BMP not found on the Virginia Stormwater BMP Clearinghouse Website, unless it is duly approved by the apartment 13 re - of Environmental Quality. commented [DMHlo]: Correction per DEQ Exceptions to requirements for phosphorus reductions shall not be allowed unless offsite options otherwise permitted pursuant to 9VAC25- 870-69 have been considered and found not available. Nothing in this section shall preclude an operator from constructing to a more stringent standard at their discretion. B. The Administrator may grant an exception from provisions contained in the County Stormwater Management Design Manual when not reasonably achievable, provided that acceptable mitigation measures are provided. C. Requests for an exception to the stormwater technical requirements shall be submitted in writing to the Administrator. Page 28 of 37 SECTION 23-5 PROPERTY OWNER RESPONSIBILITIES FOR DRAINAGE WAYS A. Drainage ways consist of natural watercourses, storm sewers, gutters, manmade channels, and other natural or manmade drainage paths. B. Every person owning property through which a drainage way passes, or such person's lessee, shall keep and maintain that part of the drainage way within the property free of trash, debris, yard wastes, and other obstacles that could pollute, contaminate, or significantly retard the flow of water. C. No person shall sweep, wash, or otherwise place dirt, trash, debris, yard wastes, or other materials in drainage ways where they could be picked up and carried off the person's property by stormwater runoff. D. The property owner or such person's lessee shall maintain healthy vegetation to protect the drainage way from excessive erosion during storm events. Particular care shall be taken to maintain healthy bank vegetation along watercourses. SECTION 23-6 CONSTRUCTION INSPECTION Section 23-6.1 NOTICE OF CONSTRUCTION COMMENCEMENT The permittee shall notify the County in advance before the commencement of land disturbing activities. In addition, the permittee shall notify the County in advance of construction of critical components of a stormwater management facility. Section 23-6.2 PERIODIC CONSTRUCTION INSPECTION A. The Administrator shall periodically inspect the land -disturbing activity during construction for: 1. Compliance with the approved erosion and sediment control plan; 2. Compliance with the approved stormwater management plan, or executed agreement in lieu of a stormwater management plan; 3. Development, updating, implementation with the pollution prevention plan; 4. Development and implementation of any additional control measures necessary to address a TMDL. B. If the County inspections find any violations, the permittee shall be notified in writing of the nature of the violation and the required corrective actions. No additional construction or land -disturbing activity in the area of the violation shall Page 29 of 37 proceed until any violations are corrected and all work previously completed has received approval from the County. The permittee is responsible f o r maintenance and repair for all stormwater management facilities during construction. C. The person responsible for implementing the approved plan is required to provide adequate inspection monitoring and reports to ensure compliance with the approved plan, to determine whether the measures required in the plan provide effective stormwater management and to allow the registered professional to certify the record documents in accordance with Section 23-3.5. All permittee inspections shall be documented and written reports prepared that contain the following information: 1. The date and location of the permittee inspection; 2. Whether construction is in compliance with the approved stormwater management plan; 2. Variations from the approved construction specifications; 3. Corrective actions that have been taken to correct previous violations; 4. Any violations that exist; and. 5. The name and signature of the person who performed the inspection. Permittee inspection documentation shall be organized chronologically and be stored with the SWPPP. D. If the County determines that there is a failure to comply with the plan, notice shall be served upon the permittee or person responsible for carrying out the plan in accordance with Section 23-9 of this Ordinance. Section 23-6.3 FINAL INSPECTION AND RECORD DOCUMENTATION A. The permittee shall submit record drawings and supporting documentation for all stormwater management facility and storm drainage system associated with the project before final County inspection. Record drawings and supporting documents shall comply with the requirements contained in the County Stormwater Management Design Manual. Record drawings shall not be required where the Administrator does not require a formal maintenance agreement and access easement agreement for stormwater management facilities designed to treat stormwater runoff primarily from an individual single-family residential lot on which they are located. Commented [DMH111: Coordinated with special residential lot conditions. B. Receipt of record drawings and supporting documentation, final inspection and approval by the County, execution and recordation of maintenance agreement, Page 30 of 37 and permit termination is required before the release of performance securities. If it is determined from the record drawings, or inspections, that the storm drainage systems and the stormwater management facilities have not been constructed in accordance with the approved stormwater management plan, then corrective action will be taken to comply with the approved Plan or the permittee shall provide studies and information required by the County to demonstrate that the constructed system will function equivalent to the approved Stormwater Management Plan, and that all regulatory requirements are met. Formatted: Indent: Left: 0.58", No bullets or D. A supplemental digital file of the record drawings shall be submitted to the numbering County for its use in maintaining public records. The supplemental digital file shall comply with the requirements contained in the Roanoke County Stormwater Management Design (Manual. /" commented [DMH12]: We need this to aid in staff .� efficiency. Formatted: Indent: Left: 0.08", Hanging: 0.5", No SECTION 23-7 I bullets or numbering POST CONSTRUCTION INSPECTION, MAINTENANCE AND REPAIR OF STORMWATER MANAGEMENT FACILITES Section 23-7.1 MAINTENANCE INSPECTIONS OF STORMWATER MANAGEMENT FACILITIES A. Following the completion and acceptance of construction, the property owner is responsible for the maintenance and repair of stormwater structures and stormwater management facilities. The property owner shall ensure that proper maintenance and repair of stormwater structures and stormwater management facilities occur and that periodic inspection, maintenance, and repair are performed so that the structures and facilities operate properly. All inspection, maintenance, and repair activities, performed by the property owner shall be documented. Documentation shall be submitted to the County, if requested. B. Stormwater structures and stormwater management facilities that have recorded stormwater facility maintenance agreements shall be operated, inspected, maintained and repaired. bV the property owner in conformance with the applicable performance requirements contained in the approved stormwater facility maintenance agreement. C gE4s� tormwater structures and stormwater management facilities were required as a condition lot 06tc., Geyeivui:ieiit. iierurore, they shall be \ operated, inspected, maintained and repaired, bV the property owner, as necessary for proper operation of the structures and facilities even if there is no+hat d'^ ^^+ hav e. a FeeA- recordFded stormwater facility maintenance agreement shall be epeFated, iRSpeeted, FnaiRtaiRed—and Fepa+Fed teras required for pFs. +,�+ the str p-W-re5A-ndfap-01;+to In the event of non-compliance, the County at its discretion, after giving appropriate notice to the property owner maV enter the property for the purpose of Page 31 of 37 Commented [DMH13]: Added language to make clear that SWM facilities without agreements still require maintenance under this ordinance. Commented [DMH14]: Remove existing as we may have new facilities with no agreements as well (due to oversights). assess civil penalties or civil cnarcies In accordance witn Section 13 y. In the Commented[DMH15]:Can welegally assess civil event that the County maintains or repairs stormwater management facilities, the penalties ifno open permit exists? a �eof shall be Following are the minimum maintenance- requirements for stormwater structures and stormwater management facilities that do not have a recorded stormwater facility maintenance agreement: 1. Stormwater structures and stormwater management facilities shall be inspected repaired as rr , by the property owner, after significant rainfall events that cause localized flooding, and at least annually. 2. All structures and slopes shall be kept in a safe condition. Stormwater sheet flow shall not be converted to concentrated flow by extendina downSDOUtS or other drains toward streets or property lines. Rain gardens, pervious pavement. and other stormwater manaaement facilities shall not be removed or rendered inoperable 3. zhllr�- '7,tormwater management facilitlasy shall be kept clear of grass clippings, cut brush, and other debris. 4. All pipes and structures shall be kept clean and clear of debris that could decrease flow capacity. 5. Sediment and silt that washes into stormwater management facilities shall be removed and properly disposed of when the sediment and silt builds up to the point that they adversely impact the facility's proper operation. 6. Trees and other woody plants shall be cut and removed from embankment slopes annually. 7. Trees and woody plants shall be cut and removed from non -embankment areas of a stormwater management facility as needed to avoid buildup of debris in the facility and to avoid a nuisance. Periodic cutting and brush removal shall occur at a frequency of at least once in three years. 8. Landscaping and grass cover shall be maintained for proper operation and erosion control. Replace landscaping as required. Repair erosion and replace grass cover as required. — Formatted: Not Expanded by / Condensed by Formatted: Indent: Left: 0.83", No bullets or 9. Manufactured stormwater management facilities shall be maintained as numbering recommended by the manufacturer. _ Formatted: Indent: Left: 0.83", No bullets or 9-10. Additional maintenance activities shall be performed, as needed, to numbering maintain proper operation. D. In addition to the inspections performed by the property owner, the County will Page 32 of 37 periodically inspect stormwater management facilities. In the event that the stormwater management facility has not been maintained and/or becomes a danger to public safety, public health, or the environment, the County shall notify the property owner by registered or certified mail. The notice shall specify the measures needed to comply and shall specify the time within which such measures shall be completed. If the responsible party fails or refuses to correct the violation, the County, after reasonable notice, may correct a violation of the design standards or maintenance needs by performing all necessary work to place the facility in proper working condition, and recover the costs from the property owner. E. If stormwater management facility inspection requires entry into a confined space, or special equipment or training, then the County may hire licensed professionals to perform the inspection, or it may require the property owner to hire a licensed professional to perform the inspection. The cost for any licensed professionals to perform the required inspection shall be paid by or recovered from the owner. The County will conduct post -construction inspections of stormwater management facilities pursuant to the County's developed, and State Board's approved inspection program and will inspect each stormwater management facility at least once every five (5) years, except that periodic post -construction lhSP8CL10i'i, oV Liie vOLAIIt�, is ,-,cL ieguired where- a formal maintenance agreement and access easement agreement is not required by the Administrator Commented [DMH16]: Coordinated special requirement for single family development. Section 23-7.2 RECORDS OF INSPECTION, MAINTENANCE AND REPAIR A. Property owners responsible for the operation and maintenance of stormwater management facilities shall make records of all inspections, maintenance, and repairs, and shall retain the records for at least five (5) years. B. Upon request from the County, property owners shall provide copies of records documenting property owner inspections, maintenance, and repairs. SECTION 23-8 HEARINGS AND APPEALS Section 23-8.1 HEARINGS A. Any permit applicant or permittee, or person subject to the requirements of this Ordinance, who is aggrieved by any action, of the County in approving or disapproving any plans required by this Ordinance, or by any enforcement action taken pursuant to Sec. 23-9, shall have the right to request, in writing, a hearing to the County Administrator or his/her designee provided a petition requesting such hearing is filed with the Administrator within 30 days after notice of such Page 33 of 37 action is given by the Administrator. B. The hearing shall be held provided that the County Administrator and the aggrieved party has at least thirty (30) days prior notice. C. A verbatim record of the proceedings of such hearings shall be taken and filed with the Board of Supervisors. Depositions may be taken and read as in actions at law. D. The County Administrator, shall have power to issue subpoenas and subpoenas duces tecum, and at the request of any party shall issue such subpoenas. The failure of any witness without legal excuse to appear or to testify or to produce documents shall be acted upon by the County Administrator whose actions may include the procurement of an order of enforcement from the circuit court. Witnesses who are subpoenaed shall receive the same fees and reimbursement for mileage as in civil actions. E. During its review, the County Administrator shall consider evidence presented by all parties. After considering the evidence, the County Administrator's decision shall be final. Section 23-8.2 APPEALS Final decisions of the County Administrator, under this Ordinance, shall be subject to judicial review by the Roanoke County Circuit Court, provided an appeal is filed within thirty (30) days from the date of any written decision adversely affecting the rights, duties, or privileges of any permit applicant, permittee, or person subject to any enforcement action under this Ordinance. SECTION 23-9 ENFORCEMENT AND PENALTIES Section 23-9.1 VIOLATIONS Any land -disturbance activity that is commenced or is conducted contrary to this Ordinance or the approved plans or agreements and permit and any property owner trial renis D F,l O VIUe I)l'Ooel I)UJL Cl+ll6ll u':., facility for which it is responsible, may be subject to the enforcement actions outlined in this section and the Virginia Stormwater Management Act. Section 23-9.2 NOTICE OF VIOLATION A. If the Administrator determines that there is a failure to comply with the VSMP authority permit conditions, _t failure to provide > maintenance to a stormwater management facility; notice shall be served upon the permittee or person responsible for carrying out the permit conditions property owner responsibly by any of the Page 34 of 37 Commented [DMH17]: Should we have language for penalties for lack of post -construction maintenance. How is this handled? How should enforcement where we have maintenance agreements be handled? Like code enforcement? What about HOAs, what about where there are no agreements? Should we place some language in here about development where there are no agreements, still require SWM facilities as required as a part of the development agreement and must be maintained? following: verbal warnings and inspection reports, notices of corrective action, consent special orders, and notices to comply. B. Written notices shall be served by registered or certified mail to the address specified in the permit application or by delivery at the site of the development activities to the agent or employee supervising such activities. C. If there is no permittee, the notices shall be issued to the property owner. D. The notice of violation shall contain: 1. The name and address of the permittee, or if there is no permittee, the property owner; 2. The address when available or a description of the building, structure, or land upon which the violation is occurring; 3. A statement specifying the nature of the violation; 4. A description of the remedial measures necessary to bring the land - disturbing activity into compliance with this Ordinance and a time schedule for the completion of such remedial action; 5. A statement of the penalty or penalties that may be assessed against the person to whom the notice of violation is directed; 6. A statement that the determination of violation may be appealed by filing a written notice of appeal within 30 days of service of notice of violation. Section 23-9.3 STOP WORK ORDERS A. If a permittee fails to comply with a notice issued in accordance with Section 23- 9.2 within the time specified, the Administrator may issue an order requiring the owner, permittee, person responsible for carrying out an approved plan, or the person conducting the land -disturbing activities without an approved plan or required permit to cease all construction land -disturbing activities until the violation of the permit has ceased, or an approved plan and required permits are obtained, and specified corrective measures have been completed. B. However, if the Administrator finds that any such violation presents an imminent and substantial danger of causing harmful stormwater runoff impacts to its MS4 system or waters within the watersheds of the Commonwealth, it may issue, without advance notice or hearing, an emergency order directing such person to cease immediately all land -disturbing activities on the site and shall provide an opportunity for a hearing, after reasonable notice as to the time and place thereof, to such person, to affirm, modify, amend, or cancel such emergency order. If a person who has been issued an order is not complying with the terms thereof, the Administrator may request the County Attorney to institute a Page 35 of 37 proceeding for an injunction, mandamus, or other appropriate remedy. C. This "stop work order" shall be in effect until the County confirms that the land - disturbing activity is in compliance with the requirements of this Ordinance and the violation has been satisfactorily addressed. Upon failure to comply within the time specified, the permit may be revoked and the applicant shall be deemed to be in violation of this article and upon conviction shall be subject to the penalties provided by this Ordinance. Section 23-9.4 CIVIL AND CRIMINAL PENALTIES A. Any person violating or failing, neglecting, or refusing to obey any rule, regulation, ordinance, order, approved standard or specification, or any permit condition issued by the Administrator may be compelled in a proceeding instituted in the Roanoke County Circuit Court to obey same and to comply therewith by injunction, mandamus, or other appropriate remedy. B. Any person who violates any provision of this Ordinance or who fails, neglects, or refuses to comply with any order of the Administrator, shall be subject to a civil penalty not to exceed $32,500 for each violation within the discretion of the court. Each day of violation of each requirement shall constitute a separate offense. C. Violations for which a penalty may be imposed under this Subsection include, but are not limited to the following: 1. No state permit registration; 2. No SWPPP; 3. Incomplete SWPPP; 4. SWPPP not available for review; 5. No approved erosion and sediment control plan; 6. Failure to install stormwater BMPs or erosion and sediment controls; 7. Stormwater BMPs or erosion and sediment controls improperly installed or maintained; 8. Operational deficiencies; 9. Failure to conduct required inspections; 10. Incomplete, improper, or missed inspections; Discharges not in compliance with the requirements of Section 9VAC25- 880-70 of the general permit Page 36 of 37 It E. 44-12. Fallule4 to perform proper post construction maintenance or repair to r a stormwater management facility. The Administrator may issue a summons for collection of the civil penalty and the action may be prosecuted in the appropriate court. In imposing a civil penalty pursuant to this Subsection, the court may consider the degree of harm caused by the violation and also the economic benefit to the violator from noncompliance. Any civil penalties assessed by a court as a result of a summons issued by the County shall be paid into the County treasury to be used for the purpose of minimizing, preventing, managing, or mitigating pollution of the waters of the County and abating environmental pollution therein in such manner as the court may, by order, direct. Formatted: Indent: Left: 0.96", No bullets or numbering Commented [DMH18]: Can we add failure to maintain SWM facilities? With the consent of any person who has violated or failed, neglected or Formatted: Indent: First line: 0" refused to obey this Ordinance or any condition of a permit, the County may provide, in an order issued by the against such person, for the payment of civil charges for violations in specific sums as Commented [DMH19]:Should this befor specificw indicated in the following schedulel:�f^ eXceed the limit f'orl amounts or not to exceed. May Administrator assess lessor �y amounts? appl:epriatG .. iil n altyyihinh AQ_ ulld be impGsed Commented [DMH2O]: Change provided to allow assessment of civil charges. the General Permit from the Department shall be one thousand j-�� dollars ($17,0&00.00) per day. 2. Commencement of land disturbing activity without preparation of a SWPPP shall be one thousand #y " pro ,collars ($1,0500.00) per day. 3. Commencement of land disturbina activitv with an incomDlete SWPPP. or failure to properly amend a SWPPP to reflect changes in design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters and has not been previously addressed in the SWPPP shall be fiveGe4&4 hundred #i#t�L-dollars ($5 050.00) per dav; 4. State Dermit reaistration statement not Dosted. or SWPPP not available for review shall be five hundred dollars ($500.00) per day. 5. Failure to comply with SWPPP requirements shall be five hundred dollars ($500.00) per day; 6. Failure to conduct and document required inspections shall be five hundred dollars ($54900.00) per day. 7. Incomplete, improper, or missed inspections, including lack of proper Page 37 of 37 Formatted: Indent: Left: 0.58", No bullets or Commented [DMH21]: All require review. signature shall be five hundred dollars ($500.00) per day. 8. Discharges not in compliance with the requirements of Section 9VAC25- 880-70 of the general permit shall be five hundred dollars ($500.00) per day. 9. Failure to obey a stop work order shall be two thousand five hundred dollars ($2,500.00) per day. 10. Failure to stop work when a permit is revoked shall be two thousand five hundred dollars ($2,500.00) per day. Formatted: Indent: Left: 0.96", No bullets or umbering Formatted: Indent: Left: 0.96", No bullets or numbering — Formatted: Indent: Left: 0.96", No bullets or 11. IFallurel to perform proper post construction maintenance or repair to a numbering stormwater management facility within the time period set by the Administrator or 30 days, whichever is longer, shall be one hundred dollars ($100.00) per day. H. The total civil charges are not to exceed the limit specified in subdivision B of this section. Such civil charges shall be instead of any appropriate civil penalty which could be imposed under subdivision B. Commented [DMH22]: Can we have civil charges for refusal to perform post construction maintenance? No VSMP permit in this instance. How are breaches in the maintenance agreements handled legally? Formatted: Indent: Left: 0.96", No bullets or numbering Formatted: Indent: Left: 0.58", No bullets or 7 6-1. Any civil charge shall be paid into the County treasury to be used for the purpose numbering of minimizing, preventing, managing, or mitigating pollution of the waters of the County and abating environmental �pollutionl. c mmented [DMH23]:Doweneed this? Do weneed a specific account code? #-J_Notwithstanding any other civil or equitable remedy provided by this Section or by law, any person who willfully or negligently violates any provision of the Ordinance, any order of the Administrator, any condition of a permit, or any order of a court shall, be guilty of a misdemeanor punishable by confinement in jail for not more than 12 months or a fine of not more than $2,500, or both. Section 23-9.5 RESTORATION OF LANDS A. Any violator may be required to restore land to its undisturbed condition or in accordance with a notice of violation, stop work order, or permit requirements. B. In the event that restoration is not undertaken within a reasonable time after notice, the County may take necessary corrective action, the cost of which shall be covered by the performance security, or become a lien upon the property until paid, or both. Section 23-9.6 HOLDS ON CERTIFICATE OF OCCUPANCY Final certificates of occupancy may not be granted at the discretion of the A ministratc Commented [DMH24]: Added language to make sure that until corrections have been made in accordance with the approved plans, notices of it was clear that this was discretionary. violation, stop work order, or permit requirements, and accepted by the County. Page 38 of 37 -END - Page 39 of 37 ACTION NO. ITEM NO. H-3 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance to amend Chapter 8.1 "Erosion and Sediment Control" of the Roanoke County Code SUBMITTED BY: Tarek Moneir Deputy Director of Development APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Chapter 8.1 — Erosion and Sediment Control is authorized by the Code of Virginia (§10.1- 50 et seq.) Title 62.1, Chapter 3.1, Article 2 known as the Virginia Erosion and Sediment Control law. Extensive revisions are needed in response to changes in State law and regulations. The most significant changes include additional stormwater management (quantity) requirements for projects that require an erosion and sediment control plan, but are not regulated under the Virginia Stormwater Program (VSMP). The attached document revises definitions to match State definitions and requires projects that require an erosion and sediment control plan to comply with VSMP water quantity requirements. It further simplifies the fees section of this chapter and updates the amount of bond maintained by the County to twenty five percent (25%) of the total cost of the project effective July 1, 2017. This is the second reading of this ordinance; the first reading was held on September 8, 2015. FISCAL IMPACT: None Page 1 of 2 ALTERNATIVES: Approve the attached amended ordinance of Chapter 8. "Erosion and Sediment Control, injunctions, and other legal actions" of the Roanoke County Code to correspond with Virginia's Erosion and Sediment Control Law. 2. Deny the amendment as presented STAFF RECOMMENDATION: Staff recommends alternative 1. Attachment A: Copy of the current Erosion and Sediment Control Ordinance Proposed Ordinance of Chapter 8 Page 2 of 2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AMENDING CHAPTER 8.1. — EROSION AND SEDIMENT CONTROL OF THE ROANOKE COUNTY CODE WHEREAS, Chapter 8.1. — Erosion and Sediment Control of the Roanoke Formatted: Justified County Code was last amended by Ordinance #052708-19 on May 27, 2008; and WHEREAS, the General Assembly for the Commonwealth of Virginia has adopted legislative changes to the enabling legislation, Article 2.4, Chapter 3.1 of Title 62.1 of the Code of Virginia, and these changes must be incorporated into the ordinances of its local governments; and WHEREAS, the administration of the Erosion and Sediment Control Program was transferred to the Department of Environmental Quality (DEQ) by Acts 2013, Chapters 756 and 793; and WHEREAS, DEQ has adopted regulations to administer the Erosion and Sediment Control Program; and WHEREAS, it is necessary for Roanoke County to amend Chapter 8.1 of the Roanoke County Code to incorporate the recent legislative and regulatory changes adopted by the Commonwealth of Virginia; and WHEREAS, these amendments revise various definitions and require compliance with water quantity of the Virginia Stormwater Management Program; and WHEREAS, the first reading of this ordinance was held on September 8, 2015, and the second reading and public hearing was held on September 22, 2015. Pagel of 24 NOW, THEREFORE, BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: That Chapter 8.1. — Erosion and Sediment Control be amended to read and provide as follows: Chapter 8.1 - EROSION AND SEDIMENT CONTROL Sec. 8.1-1. - Title, purpose and authority. This chapter shall be known as the "Erosion and Sediment Control and Steep Slope Development Ordinance of the County of Roanoke, Virginia." The purpose of this chapter is to prevent degradation of properties, stream channels, waters and other natural resources of Roanoke County e-e-inseirve the eFether e of the n„„nfi, by establishing requirements for the control of soil erosion sediment deposition and non-agricultural runoff ands sed-ime^+a+1e^ and by establishing requirements for development of steep slopes, and by establishing procedures whereby these requirements shall be administered and enforced. This chapter is authorized by the Code of Virginia, Title 62.14-94, Chapter 3.11a, Article 2.4(Ses. 10.1 56560 et sem, known as the Virginia Erosion and Sediment Control Law. Sec. 8.1-2. - Applicability of chapter in Town of Vinton. The provisions of this chapter shall be applicable within the corporate limits of the Town of Vinton. Administrative procedures and review fees may be established to accommodate the review of plans for development located within the town. Sec. 8.1-3. - Definitions. As used in this chapter, unless the context requires a different meaning: Agreement in lieu of a plan means a contract between the plan -approving authority and the owner that specifies conservation measures that must be implemented in the construction of a single-family residence he fi^leen linin +hniicond five hiinrlred (2 Gnn\ c e foo+ and five +hei�c�nrl /G nnn\ feet nd"er ficin hi'.RdFed fi#y 25n1 to five hiinrlred iGnm iihin aFds,. this contract may be executed by the plan -approving authority in lieu of a formal site plan. Page 2 of 24 Applicant means any person submitting an erosion and sediment control plan for approval or requesting the issuance of a permit, when required, authorizing land - disturbing activities to commence. Board means the_ sta+e oeil on,t ,Vater ��Virginia State Water Control Board. Certified inspector means an employee or agent of a VESCPpregram authority who (i) holds a certificate of competence from the Bt3oard in the area of project inspection or (ii) is enrolled in the Board's training program for project inspection and successfully completes such program within one year after enrollment. - Certified plan reviewer means an employee or agent of a VESCPpregram authority who; "Holds a certificate of competence from the Board in the area of plan rev iew, (2) (ii) is enrolled in the Board's training program for plan review and successfully completes such program within one year after enrollment, or NO ids licensed as a professional engineer, architect, certified landscape architect or land surveyor pursuant to Aarticle 1 ( , Sec. 54.1-400 et seq.) of Cehapter 4 of Ttitle 54.1 or a professional soil scientist as defined in Sec. 54.1-2200 of the Code of Virginia. Certified program administrator means an employee or agent of a VESCPpFG@lFaR; authority who (i) holds a certificate of competence from the 134oard in the area of program administration or (ii) is enrolled in the Board's training program for program administration and successfully completes such program within one year after enrollment. Clearing means any activity which removes the vegetative ground cover including, but not limited to, root mat removal or top soil removal. 61 �E61Si9rr n+rib..+in +e nSer"3+TM -A trey+tMGR+. The plaR shall n+a n all majer dPP'M-.;MAR-.; tA -Pp. that the entire --nit Ar --nits Af land will [:) nhieve the n io+inn ebientiyes County means the County of Roanoke. Oenud-erl rneaRs o term plied to land that has boon nhysinolly disturbed and n Ienner c erts vegetative n Department means the D4epartment of Environmental Quality PPAPPR+Me P. Page 3 of 24 Development means a tract or parcel of land developed or to be developed as a single unit under single ownership or unified control which is to be used for any business or industrial purpose or is to contain three (3) or more residential dwelling units. Director means the Ddirector of the Department of Environmental Quality. District or Ssoil and W -water Ceonservation Ddistrict refers to the Blue Ridge Soil and Water Conservation District. Erosion and Ssediment Ceontrol Polan or Pplan means a document containing material for the conservation of soil and water resources of a unit or group of units of land. It maV include appropriate maps, an appropriate soil and water plan inventory, and management information with needed interpretations and a record of decisions contributing to conservation treatment. The plan shall contain all major conservation decisions and all information deemed necessarV bV the County to assure that the entire unit or units of land will be so treated to achieve the conservation objectives. An Erosion and Sediment Control Plan must be prepared bV a Virginia Professional Engineer, Land Surveyor, Landscape Architect, Architect, or Professional Soil Scientist. Erosion impact area means an area of land not associated with current land disturbing activity but subject to persistent soil erosion resulting in the delivery of sediment onto neighboring properties or into state waters. This definition shall not apply to any lot or parcel of land of ten thousand (10,000) square feet or less used for residential purposes. Excavating means any digging, scooping or other methods of removing earth materials. Filling means any depositing or stockpiling of earth materials. Geotechnical report means a report provided at the applicant's expense, prepared and stamped by a professional engineer, that communicates site conditions, and recommends design and construction methods. (1) The geotechnical report shall include any or all of the following basic information, as determined by the professional engineer: a. Summary of all subsurface exploration data, including subsurface soil profile, exploration logs, laboratory or in situ test results, and ground water information; b. Interpretation and analysis of the subsurface data; c. Specific engineering recommendations for design; Page 4 of 24 d. Discussion of conditions for solution of anticipated problems; and e. Recommended geotechnical special provisions. (2) For guidance in investigating site conditions and preparing geotechnical reports, the professional engineer may refer to all applicable sections of: "Checklist and Guidelines for Review of Geotechnical Reports and Preliminary Plans and Specifications", US Department of Transportation, Federal Highway Administration Publication No. FHWA ED -88-053, as amended. (3) The geotechnical report shall be submitted to the plan -approving authority and included in site development files prior to issuance of a land disturbing permit. Grading means any excavating or filling of earth material or any combination thereof, including the land in its excavated or filled conditions. Land -disturbing activity means any man-made Xchange to the land surface that „ may result in soil erosion from water or wind and the movement of sediments into state waters or onto lands in the Csommonwealth, including, but not limited to, clearing, grading, excavating, transporting and filling of land, except that the term shall not include: (1) Minor land -disturbing activities such as home gardens and individual home landscaping, repairs and maintenance work; (2) Individual service connections; (3) Installation, maintenance, or repairs of any underground public utility lines when such activity occurs on an existing hard -surfaced road, street or sidewalk provided such land -disturbing activity is confined to the area of the road, street or sidewalk that is hard -surfaced; (4) Septic tank lines or drainage fields unless included in an overall plan for land - disturbing activity relating to construction of the building to be served by the septic tank system; (5) Permitted s.9urface or deep mining operations and protects, or oil and gas operations and protects conducted pursuant to Title 45.1 of the Code of Virginia; (6) €xplepatinn 9F drilling fep eil and gas ORG161GIOR9 she well Site ads feedeIRes,, {}Tilling, planting, or harvesting of agricultural, horticultural, or forest crops, or livestock feedlot operations; including engineering operations as follows: construction of terraces, terrace outlets, check dams, desilting basins, dikes, ponds, ditches, strip cropping, lister furrowing, contour cultivating, contour furrowing, land drainage, and land irrigation; however, this exception shall not apply to harvesting of forest crops unless the area on which harvesting occurs is reforested artificially or naturally in accordance with the provisions of Page 5 of 24 Cehapter 11 ( Sec. 10.1-1100 et seq.) of Tthis title 10.1 of the Code of Virginia or is converted to bona fide agricultural or improved pasture use as described in Ssubsection B of Sec. 6e 10.1-1163; (7g)Repair or rebuilding of the tracks, rights-of-way, bridges, communication facilities and other related structures and facilities of a railroad company; (88)Agricultural engineering operations including but not limited to the construction of terraces, terrace outlets, check dams, desilting basins, dikes, ponds not required to comply with the Dam Safety Act, aFtiele 2 (Va. Code § 10.1-604 et seq.)Gf Ghapter a the ^f ditches, strip cropping, lister furrowing, contour cultivating, contour furrowing, land drainage, and land irrigation; (948) Disturbed land areas fer all --ser, ^f less than two thousand five hundred (2,500) square feet in size; except as herein described for residential development. (104-) Installation of fence and sign posts or telephone and electric poles and other kinds of posts or poles; (112-) Emergency work to protect life, limb or property, and emergency repairs; howeverpfe*ided. t if the land- disturbing activity would have required an approved erosion and sediment control plan, if the activity were not an emergency, then the land area disturbed shall be shaped and stabilized in accordance with the requirements of the plaR appF9VORg—aafh�heFitythis Ordinance. Land -disturbing Ppermit or approval means a permit or other form of approval issued by the Ceounty for the clearing, filling, excavating, grading, transporting of land or for any combination thereof or for any other land disturbing activityp4949se _Qf- rfh hprpm}. A' 41ine ^f the ty te Fegulate land diofiirhin aGtiVitiGs nrl nlinioo and ^ iirlolinoc fonhninol Materials Natural channel desion conceats means the utilization of engineering analysis and fluvial geomorphic processes to create, rehabilitate, restore, or stabilize an open conveyance system for the purpose of creating or recreating a stream that conveys its bankfull storm event within its banks and allows laraer flows to access its bankfull bench and its floodplain. Owner means the owner or owners of the freehold of the premises or lesser estate therein, a mortgagee or vendee in possession, assignee of rents, receiver, executor, trustee, lessee or other person, firm or corporation in control of a property. Peak flow rate means the maximum instantaneous flow from a aiven storm condition at a particular location Page 6 of 24 Permittee means the person to whom the pepmot a„+hnriZinn land -disturbing approvalaatii+ina is issued or the person who certifies that the approved erosion and sediment control plan will be followed. Person means any individual, partnership, firm, association, joint venture, public or private corporation, trust, estate, commission, board, public or private institution, utility, cooperative, county, city, town or other political subdivision of the commonwealth, any interstate body, or any other legal entity. FGSPORS disturbing an+ivi+ino en nit nr units of lands and fnr a Rg plana . 61111-8Oona+ refers +n rli+innsthotma be FeaSGRably GXPGGtGd GF +mid Pr-- deyelopmnnf rnfnro to n nrli+inna at +hn tomo +hn o nd onrliMeRt nnn+rnl the time the eresien and sediment n ntrnl plan fnr +hn initial phaseis siihmitted fnr Responsible land disP�Pbepdisturber or RLD means an +mid -al individual holding a certificate issued by the Department who is responsible for carrying out the land - disturbing activity in accordance with the approved ESC plan. In addition, the RLD may be a Virginia Professional Engineer, Land Surveyor, Landscape Architect, Architect, or Professional Soil Scientist, provided that it is the same licensed professional who sealed and signed the ESC plan. The RLD may be the owner, applicant, permittee, designer, superintendent, project manager, contractor, or any other project or development team member. The RLD must be designated on the ESC plan or permit as a prerequisite for engaging in land disturbance. nharnn of and oihln fnr n ii+ land rliafiirhinn an+ivifii n rn rJ by aR appFevnd plan n agFGGMGn+ in linii of a plan nihn- Page 7 of 24 Runoff volume means the volume of water that runs off the land development prosect from a prescribed storm event. Single-family residence means a noncommercial dwelling that is occupied exclusively by one (1) family. Steep slope means a slope greater than 3:1, or thirty-three and one-third (33.3) percent. atmea eRs vitheli+'RG61FFORg �m� State permit means an approval to conduct a land -disturbing activity issued bV the Board in the form of a state stormwater individual permit or coverage issued under a state general permit. State waters means all waters on the surface and under the ground wholly or partially within or bordering the C4ommonwealth or within its jurisdictions. Town means the incorporated Town of Vinton. Transporting means any moving of earth materials from one place to another place other than such movement incidental to grading, when such movement results in destroying the vegetative ground cover either by tracking or the buildup of earth materials to the extent that erosion and sedimentation will result from the soil or earth materials over which such transporting occurs. Virginia Erosion and Sediment Control Program or VESCP means a program approved by the Board that has been established by a VESCP authority for the effective control of soil erosion, sediment deposition, and non-agricultural runoff associated with a land -disturbing activity to prevent the unreasonable degradation of properties, stream channels, waters, and other natural resources and shall include such items where applicable as local ordinances, rules, permit requirements, annual standards and specifications, policies and guidelines, technical materials, and requirements for plan review, inspection, enforcement where authorized in this article, and evaluation consistent with the requirements of this article and its associated regulations. VESCP aPlan-approving authority means the Director of Community Development or his assignee, depaFtMeR+ of eemmuRmty ,,,,velen.,.eRt which is responsible for determining the adequacy of a GQP,- �+;+^^ plan submitted for land -disturbing activities on a unit or units of lands and for approving plans. VESCP authority or program authority means Roanoket4e. Csounty which has adopted a soil erosion and sediment control program that has been approved bV the B -board. Water Quality Volume means the volume equal to the first one-half inch of runoff multiplied bV the impervious surface of the land development prosect. Page 8 of 24 Sec. 8.1-4. - Administration of chapter in conjunction with subdivision and zoning ordinances. This chapter shall be administered, where applicable, in conjunction with the county's subdivision and zoning ordinances wherein such apply to the development and subdivision of land within the county or where such apply to development on previously subdivided land within the county. Sec. 8.1-5. - Local erosion and sediment control program. (a) Pursuant to section 62.1-44.15:54 of the Code of Virgin iaGGde „+ ViFgiRia § 10.1 162, the Ceounty hereby establishes a VESCP program and -adopts the regulations promulgated by the Board (for the effective control of soil erosion and sediment deposition to prevent the unreasonable degradation of properties, stream channels, waters and other natural resources) and the Virginia Erosion and Sediment Control Handbook, as amended, , efeFe+Ges, g6lFeIORes, standaF's and spesifiGatiG s promulgated by the state ,l +or P.APrPP,;;tOAnbGard and those more stringent local SteFfflwateF maRageffleRt criteria which the county board of supervisors, may adopt by resolution and incorporate into the manual of regulations and policies entitled "Stormwater Management Design Manual" and "Design and Construction Standards Manual". (b) In accordance with § 62.1-44.15:52 of the Code of Virginia, anv plan approved prior to July 1, 2014 that provides for stormwater management that addresses any flow rate capacity and velocity reauirements for natural or man-made channels shall is less than or equal to the peak flow rate from the site assuming it was in a good forested condition, achieved through multiplication of the forested peak flow rate by a reduction factor that is equal to the runoff volume from the site when it was in a good forested condition divided by the runoff volume from the site in its proposed condition, and shall be exempt from any flow rate capacity and velocity requirements for natural or man-made channels Page 9 of 24 (2-1a)Forplans approved on and after July 1, 2014, the flow rate capacity and velocity requirements for natural and man-made channels shall be satisfied by compliance with water quantity requirements specified in § 62.144.15:28 of the Stormwater Management Act and 9VAC25-870-66 of the Virginia Stormwater Management Program (VSMP) regulations, unless such land -disturbing activities are in accordance with the grandfathering provisions of the Virginia Stormwater Management Program (VSMP) Regulations. The Ceounty hereby designates the D4irector of Ceommunity 24evelopment or his assignee as the plan -approving authority. (c) The program and regulations provided for in this chapter shall be made available for public inspection at the office of the Ddepartment of Caommunity Ddevelopment. (d) Pursuant to Sec. 62.1-44.15:53 of the Code of Virginia§ '^�1.4, an erosion control plan shall not be approved until it is reviewed by a certified plan reviewer. Inspections of land -disturbing activities shall be conducted by a certified inspector. The erosion control program of the Ceounty shall contain a certified program administrator, a certified plan reviewer, and a certified inspector, who may be the same person. Sec. 8.1-6. - Regulated land -disturbing activities; submission and approval of plans; contents of plans. (a) Except as provided herein, no person may engage in any land -disturbing activity until he or she has submitted to the D4epartment of Csommunity D4evelopment an erosion and sediment control plan for the land -disturbing activity and such plan has been approved by the VESCP plaR apprGviPff authority. No approval to begin a land -disturbing activity will be issued unless evidence of state permit coverage is obtained where it is required. Where land -disturbing activities involve lands under the jurisdiction of more than one VESCP , an erosion and sediment control plan, at the option of the County'", may be submitted to the Departmentheard for review and approval rather than to each jurisdiction concerned. The Department may charge the County a fee sufficient to cover the cost associated with conducting the review. -Where the land -disturbing activity results from the construction of a single-family residence, an agreement in lieu of a plan may, at the discretion of the County, be substituted for an erosion and sediment control plan if executed by the plan - approving authority. Additional requirements are given below: (1) Where the land -disturbing activity, from the construction of a single-family residence, results in hebveep bye thei-sand five h61RGIFer! (2,500) sg6lape foot a++dless than five thousand (5,000 ) square feet and/eF twe hy.n4i:Pd. fifty (25Q) to five h61RGIFerl (5O0) iihin y arf disturbed area, an Page 10 of 24 "agreement in lieu of a plan" ,.,+r„I nlon if o „+or, by the plan aPPFGViRg wtheri+„ shall be accompanied by a plot plan that meets the Virginia Uniform Statewide Building Code for building permit plot plan requirements. (2) Where the land -disturbing activity, from the construction of a single-family residence, results in her five thousand (5,000) square feet or more a444 nmnptpn +hp-sRnd ohiinrlmrl o+„ o (9_49419,9W) s9ware foo+ and./Ar 919 isturbed area, an "agreement in lieu of a plan" shall be accompanied by-e44e; a plot plan that meets the Virginia Uniform Statewide Building Code for building permit plot plan requirements, prepared by a eeFticcrrn;ed responsible land disturbers er—aR eRgiReeFed plan ppepared by a Virginia Professional Engineer, Land Surveyor, Landscape Architect, Architect, or Professional Soil Scientist. pFefeSsmeRal or+ified Ionrlonape ornhi+on+ ohGWORg the Prosion and sediment 69i +rr^vIr rneaswpes. m6ist he swhmitted and exe-A- ted by 3 autheFity—A ^gid -responsible land disturber must also be provided and identifiedParaed. _ 3)VVh�i� �rL iRg a yi fr..m the rtr,,..+i.. ..f Eile family 7�s__Ge, FeswitsOR tepR thew �'Jsaa Tsquape fieet _and/Ar seven hundred- fifty (750) whin yards -Fer.f disturbed area, aR eFGSOGRRd 1pgq+h�Tn +ep the -sand (10,000) s9ware-feet, Feer +n the Aha,t belew tome deterM. i R e req6lireraeats fe rr the site Exempt fFGFR *bwildiRg per Page 11 of 24 ,�— z2J- 9— �, rd99 ; 5,()()() i 9,989 748 r Ftifie d RLD, r.r+ifir..d laRGISGape ornhi+on+ Ar A P-E�eee I _ >=X0,090 >7a9 FErnssin.. And semi Y on+ Pte. Ar Certified IaRGISGape rnhitGGt� o Rt� rety� a *hiiilrlinn Permit plat plaR, of FeqUOFGd by the No n+c (c) An erosion and sediment control plan shall be filed for a development and the buildings constructed within, regardless of the phasing of construction. (d) If individual lots or sections in a residential development are being developed by different property owners, all land -disturbing activities related to the building construction shall be covered by an erosion and sediment control plan or an "Agreement in Lieu of a Plan" signed by the property owner. The property owner is responsible for complying with the provisions of (a) or (b) above for each lot to obtain an erosion and sediment control permit. e) Land-disturbina activitv of less than two thousand five hundred (2.500) sauare feet on individual lots in a residential development shall not be considered exempt from the provisions of this ordinance, if the total land -disturbing activity in the development is equal to or areater than two thousand five hundred (2.500) sauare feet Page 12 of 24 (fd) The standards contained with the "Virginia Erosion and Sediment Control Regulations," and The Virginia Erosion and Sediment Control Handbooks amended and those more stringent local stormwater management criteria which the board of supervisors of the county, may adopt by resolution and incorporate into the manual of regulations and policies entitled "Stormwater Management Design Manual" and "Design and Construction Standards Manual" are to be used by the applicant when making a submittal under the provisions of this chapter and in the preparation of an erosion and sediment control plan.-_In cases where one standard conflicts with another, the more stringent applies. The VESC 1plaa appFeuiagIp an- approving authority, in considering the adequacy of a submitted plan, shall be guided by the same standards, regulations and guidelines. The plan apppeviRg .,furl in ZIWAC-50 20 50 nffho cfofo o nrl SGdO .onf n nfrnl r iilatiens (ge)The VESCP plan-approving authority shall review erosion and sediment control plans submitted to it and grant written approval within 60 days of the receipt of the plan if it determines that the plan meets the requirements of the Erosion and Sediment Control Law and the Board's regulations, and if the person responsible for carrying out the plan certifies that he will properly perform the measures included in the plan and will conform to the provisions of this ordinance. In addition, as a prerequisite to engaging in the land-disturbing activities shown on the approved plan, the person responsible for carrying out the plan shall provide the name of the responsible land disturber, to the program authority, as provided by § 62.1- 44.15:52, of the Virginia Erosion and Sediment Control Law, who will be in charge of and responsible for carrvinq out the land-disturbing activity. Failure to provide the name of the responsible land disturber, prior to engaging in land-disturbing activities may result in revocation of the approval of the plan and the person responsible for carrvinq out the plan shall be subject to the penalties provided in this ordinance. However, the VESCP plan-approving authority may waive the certificate of competence requirement for an agreement in lieu of a plan for construction of a single family residence. If a violation occurs during the land-disturbing activity, then the person responsible for carrying out the agreement in lieu of a plan shall correct the violation and provide the name of the responsible land disturber, as provided by 62.1-44.15:52 of the Virginia Erosion and Sediment Control Law. Failure to provide the name of the responsible land disturber shall be a violation of this chapter. Page 13 of 24 measures nI61GIG I in fho PI;_;A A_Pd VAII n r.fnrm fn fho n of thio nhapter. NWhen the plan is determined to be inadequate, written notice of disapproval stating the specific reasons for disapproval shall be communicated to the applicant within forty-five (45) days. The notice shall specify the modifications, terms and conditions that will permit approval of the plan. If no action is taken by the plan -approving authority within the time specified above, the plan shall be deemed approved and the person authorized to proceed with the proposed activity. (if) d+s#urbiRg eet+vities shn,.,n the appreved plar thePeFSnFes{Grs+ble—fer 6sMPeteRGGteth 6 ifherif„ as O4,ided by SeGti„n 10. 1 561 of the state prev the n;;rmm „f a �i„i �„�I hAldi. eeFtifiiea#e Gf eGmpeteRGe Prier te ;e p&rsGN fnrAERFFYORg64 fho plan chal hho ciihicGf tG thho peRalties PFA-Vid-kad On this The VESCP authority shall act on any erosion and sediment control plan that has been previously disapproved within 45 days after the clan has been revised. resubmitted for aooroval. and deemed adeauate. Qg) The VESCP authority may require changes to aAn approved plan may 18 nhaRg by the plaR appFGVdRg when: (1) The inspection reveals that the plan is inadequate to satisfy applicable regulations; or (2) The person responsible for carrying out the plan finds that because of changed circumstances or for other reasons the approved plan cannot be effectively carried out, and proposed amendments to the plan, consistent with the requirements of this chapter, are agreed to by the plan approving authority and the person responsible for carrying out the plan. Page 14 of 24 (L4)Variances: The VESCP plan -approving authority may waive or modify any of the standards that are deemed to be inappropriate or too restrictive for site conditions, by granting a variance. A variance may be granted under these conditions: (1) At the time of plan submission, an applicant maV request a variance to become part of the approved erosion and sediment control plan. The applicant shall explain the reasons for requesting variances in writing. Specific variances which are allowed bV the plan -approving authoritV shall be documented in the plan. During construction, the person responsible for implementing the approved plan maV request a variance in writing from the plan -approving authority. The plan -approving authority shall respond in writing either approving or disapproving such a request. If the plan -approving authoritV does not approve a variance within 10 days of receipt of the request, the request shall be considered to be disapproved. Following disapproval, the applicant maV resubmit a variance request with additional documentation. The VESCP authority shall consider variance requests ludiciouslV, keeping in mind both the need of the applicant to maximize cost effectiveness and the need to protect off-site properties and resources from damage. (1) In order to prevent further erosion, the Cc-ounty may require approval of a plan for any land identified in the local program as an erosion impact area. (mi)When a land -disturbing activity will be required of a contractor performing construction work pursuant to a construction contract, the preparation, submission, and approval of an erosion control plan shall be the responsibility of the owner. (nt) In accordance with the procedure set forth in §62.1-44.15:55 (E) of the Code of Virginia, any person engaging, in more than one jurisdiction, in the creation and operation of wetland mitigation or stream restoration banks, which have been approved and are operated in accordance with applicable federal and state guidance, laws, or regulations for the establishment, use, and operation of wetland mitigation or stream restoration banks, pursuant to a mitigation banking instrument signed by the Department of Environmental Quality, the Marine Resources Commission, or the U.S. ArmV Corps of Engineers, maV, at the option of that person, file general erosion and sediment control specifications for wetland mitigation or stream restoration banks annuallV with the Board for review and approval consistent with guidelines established bV the Board. Approval of general erosion and sediment control specifications does not relieve the owner or operator from compliance with anV other local ordinances and regulations including requirements to submit plans and obtain permits as maV be required bV such ordinances and regulations. Page 15 of 24 gas oldno GGmpaRies nrl adlrnarl GS shall filo gGReralerAsiep And spee AAmments.; Thos nifina+inns shall a nl„ +n'. ;sem+ ^esessary w,"ep beard appreved SpeG are fellewed, hewever, PFGjon+s GII-148dOA S_1_1.hdiViSiGRS (1) anrd M\ is+ n nl„ with bGapd apppeved Spe nifino+inns PF9jes+s ROt i nliirlorl i d„ d iihrlsdnns (1) anrd M\ of this subsos+inn ArdMARAGP The bA_iairdl -.;.h.all have sixty (60) days OR whieh te appFeVe the speeifieatieRs. if RE) aGtOGR rs+aLeR by thT arylyVi+hin (30 days the SpeGifiGati9RS shall he deemed a orl Tho hnarrl shall ha„o the a' i+hnrdfi, +r, onfnrno a ed s nifina+inns (2-k)State agency projects are exempt from the provisions of this chapter, except as provided for in the Code of Virginia, Sec. 62.1-44.15:56§-U9.4 E�4. (pl) If the grade of a site is more than thirty-three and one-third (33.3) percent refer to Formatted: Not Highlight the International Building Code for steep slope development requirements. (q+x4) Cut slopes or fill slopes shall not be greater than 2:1 (horizontal:vertical), unless a geotechnical report is provided for the proposed slopes. (r+4) Cut slopes or fill slopes shall not be greater than twenty-five vertical feet in height, unless a geotechnical report is provided for the proposed slopes. Cut slopes or fill slopes less than or equal to 3:1 (horizontal:vertical) may exceed twenty-five (25) vertical feet in height and shall not require a geotechnical report. (se)For any cut slopes or fill slopes greater than or equal to 2:1 (horizontal:vertical) ora+ greater than or equal to twenty-five (25) vertical feet in height with a slope greater than 3:1 (horizontal:vertical), as-built plans showing that the finished geometry, based on a field survey performed by a licensed surveyor, is in substantial conformity with the design shall be provided to the plan-approving authority. (t-p) Fill materials, compaction methods and density specifications shall be indicated on the site development plans. Fill areas intended to support structures shall also be indicated on the site development plans. stanrdrr and shall he si h tmitted to the IanaPPFGViRg 64hnrifi, Page 16 of 24 (q)Development plans for all new subdivisions shall show proposed lot grades to ensure positive drainage. Sec. 8.1-7. - Permits; fees; bonding; etc. (a) Agencies authorized under any other law to issue grading, building, or other permits for activities involving land -disturbing activities may not issue any such permit unless the applicant submits with his application an approved erosion and sediment control plan certification that the plan will be followed and evidence of state permit coverage where it is required. (b) No person shall engage in any land -disturbing activity until he has acquired a land - disturbing permit, unless the proposed land -disturbing activity is specifically exempt from the provisions of this chapter, and has paid the fees and posted the required bond. (c) Fees. An applicant requesting permission to begin land -disturbing activity pursuant to this article shall pay the following fees to cover the administrative expense of review, permitting, and inspection. Disturbed Area (Square Feet) Fee Less than 5,000 $25.00 5,000 — 9,999 $50.00 10,000 — or greater $100.00 + $100.00 per disturbed acre, or portion of an acre Page 17 of 24 Formatted: Font: Arial, 12 pt, Highlight Formatted Table Formatted: Font: Arial, 12 pt, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, 12 pt, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, 12 pt, Highlight Formatted: Font: Arial, 12 pt, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, 12 pt, Highlight Formatted: Font. Arial, 12 pt, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, 12 pt, Highlight Formatted: ed: rmatted: Font. Arial, Highlight FormattFont. Arial, 12 pt, Highlight Formatted- Font: Arial, 12 pt, Highlight Formatted: Font: Arial, Highlight Formatted: Font: Arial, 12 pt, Highlight In the event that the County requests the Department to review and approve of Formatted: Font: Arial, Highlight land -disturbing activities that involve lands under the jurisdiction of more than one VESCP, the applicant shall be responsible to pay the entire fee that the Department charges the County to cover the Department's cost associated with conducting the review and inspections. (e4)No land -disturbing permit shall be issued until the applicant submits with the application an approved erosion and sediment control plan or agreement in lieu of an approved erosion and sediment control plan and certification that the plan will be followed. Bond. All applicants for permits shall provide to the Ceounty a performance bond, cash escrow, or an irrevocable letter of credit acceptable to the D4irector of Ceommunity Development or his assignee, to ensure that measures could be taken by the County at the applicant's expense should the applicant fail, after proper notice, within the time specified to initiate or maintain appropriate conservation measures required of him as a result of his land -disturbing activity. The amount of the bond or other security for performance shall not exceed the total of the estimated cost to initiate and maintain appropriate conservation action based on unit price for new public or private sector construction in the locality plus a contingency for estimated administrative costs and inflation. The contingency shall be 10% of the total estimated cost to initiate and maintain the appropriate conservation action, until July 1, 2017. On July 1, 2017 and thereafter, the contingency shall be 25%. The amount of contingency is in accordance with Title 15.2, Chapter 22, Article 41 (Section 15.2-2241, et seq.) of the Code of Virginia amended Should it be necessary for the Ceounty to take such C conservation action, the eounty may collect from the applicant any costs in excess of the amount of the surety held. Within 60 days of adequate stabilization and completion of all other site requirements, as determined by the D4irector of Ceommunity Ddevelopment or his assignee, such bond, cash escrow or letter of credit, or the unexpended or unobligated portion thereof shall be either refunded to the applicant or terminated. Page 18 of 24 (he)These requirements are in addition to all other provisions relating to the issuance of permits and are not intended to otherwise affect the requirements for such permits. Sec. 8.1-8. - Monitoring, reports, and inspections. (a) The responsible land disturber, as provided in § 62.1-44.15:52, shall be in charge of and responsible for carrvinq out the land -disturbing activity and provide for periodic inspections of the land -disturbing activity. The Ceounty may require the person responsible for carrying out the plan oRGI�9F 4h+ham ihlo'onr7 diSt.irher to monitor .the land -disturbing activity. Theep rson responsible for carrying out the plan4e^d4&+„r"or will maintain records of these inspections and maintenance, to ensure compliance with the approved plan and to determine whether the measures required in the plan are effective in controlling erosion and sedimentation. (b) The D4epartment of Csommunity 24evelopment shall periodically inspect the land - disturbing activity in accordance with 9VAC25-840-60 of the Virginia Erosion and Sediment Control Regulationsas r -&%Y d e thhe state—pregra,m to ensure compliance with the approved plan and to determine whether the measures required in the plan are effective in controlling erosion and sedimentation. The owner, permittee, or person responsible for carrying out the plan shall be given notice of the inspection. If the Dd•irector of Ceommunity 24evelopment. or his assignee, determines that there is a failure to comply with the plan or if the plan is determined to be inadequate, notice shall be served upon the permittee car. person responsible for carrying out the plan er the rosr., RSmh'o 'onrJ dis+„rhor by registered or certified mail to the address specified in the permit application or in the plan certification, or by delivery at the site of the land -disturbing activities to the agent or employee supervising such activities. The notice shall specify the measures needed to comply with the plan and shall specify the time within which such measures shall be completed. Upon failure to comply within the specified time, the permit may be revoked and the permittee shall be deemed to be in violation of this chapter and, upon conviction, shall be subject to the penalties provided by this chapter. (c) Upon issuance of an inspection report denoting a violation of Va. Code §§ 62.1- 44.15:55, -44.15:56, the Director of Community Development, or his assignee, may, in conjunction with or subsequent to a notice to comply as specified in this chapter, issue an order requiring that all or part of the land -disturbing activities permitted on the site be stopped until the specified corrective measures have been taken. r his assigRee may, R GeRjL1RGtieR with n ubseque Rt W a netir.e bA n ply a s h,.wr. h...... +..kpn Page 19 of 24 If land -disturbing activities have commenced without an approved plan or proper permits, the D4irector of Ceommunity devrDevelopment or his assignee may, in conjunction with or subsequent to a notice to comply as specified in this chapter, issue an order requiring that all of the land -disturbing and/or construction activities be stopped until an approved plan or any required permits are obtained. Failure to comply will result in civil penalties as outlined in section 8.1-9 of this chapter. Where the alleged noncompliance is causing or is in imminent danger of causing harmful erosion of lands or sediment deposition in waters within the watersheds of the C4eommonwealth, or where the land -disturbing activities have commenced without an approved plan or any required permits, such an order may be issued without regard to whether the permittee has been issued a notice to comply as specified in this chapter. Otherwise, such an order may be issued only after the permittee has failed to comply with such a notice to comply. The order shall be served in the same manner as a notice to comply, and shall remain in effect for a period of seven (7) days from the date of service pending application by the CountVGRfGFGiRg authe4y or permit holder for appropriate relief to the Ceircuit Ceourt. The County shall serve such order for disturbance without an the address specified in the land records. Said order shall be posted on the site where the disturbance is occurring, and shall remain in effect until permits and plan approvals are secured, except in such situations where an agricultural exemption applies. If the alleged violator has not obtained an approved plan or any required permits within seven (7) days from the date of service of the order, the D4.irector of C ommunity 24evelopment or his assignee may issue an order to the owner requiring that all construction and other work on the site, other than corrective measures, be stopped until an approved plan and any required permits have been obtained. Such an order shall be served upon the owner by registered or certified mail to the address specified in the permit application or the land records of the Cru nty. The owner may appeal the issuance of an order to the -circuit Csourt of the Geounty. Any person violating or failing, neglecting or refusing to obey an order issued by the D4irector of CGommunity L,development or his assignee may be compelled in a proceeding instituted in the Csircuit Ceourt of the Ceounty to obey same and to comply therewith by injunction, mandamus or other appropriate remedy. Upon completion and approval of corrective action or obtaining an approved plan or any required permits, the order shall immediately be lifted. Nothing in this section shall prevent the D4irector of Ceommunity Ddevelopment or his assignee from taking any other action authorized by this chapter. Page 20 of 24 Sec. 8.1-9. - Penalties, injunctions, and other legal actions. (a) Violators of this chapter shall be guilty of a CGlass I misdemeanor. (b) Civil penalties: (1) A civil penalty in the amount listed on the schedule below shall be assessed for each violation of the respective offenses: a. Commencement of land disturbing activity without an approved plan as provided in section 8.1-6 shall be one thousand dollars ($1,000.00) per day. b. Vegetative measures. Failure to comply with items 1, 2 a 3, or 5 of the minimum standards shall be three hundred dollars ($300.00) per violation per day. c. Structural measures. Failure to comply with items 2, 4, 6, 7, 8, 9, 10, 11, 15v a4:4 17, or 18 of the minimum standards shall be three hundred dollars ($300.00) per violation per day. d. Watercourse measures. Failure to comply with items 12, 13 and 15 of the minimum standards shall be three hundred dollars ($300.00) per violation per day. e. Underground utility measures. Failure to comply with item 16(a) and/or (c) shall be three hundred dollars ($300.00) per violation per day. f. Failure to obey a stop work order shall be one thousand dollars ($1,000) per day. g. Failure to stop work when permit revoked one thousand dollars ($1,000) per day. (2) Each day during which the violation is found to have existed shall constitute a separate offense. However, in no event shall a series of specified violations arising from the same operative set of facts result in civil penalties which exceed a total of ten thousand dollars ($10,000.00), except that a series of violations arising from the commencement of land -disturbing activities without an approved plan for any site shall not result in civil penalties which exceed a total of ten thousand dollars ($10,000.00). The assessment of civil penalties according to this schedule shall be in lieu of criminal sanctions and shall preclude the prosecution of such violation as a misdemeanor under subsection (a) of this section. (c) The D4irector of Ceommunity 24evelopment or his assignee, or the owner of property which has sustained damaae or which is in imminent danaer of beina damaged, may apply to the Ceircuit Ceourt of the Ceounty to enjoin a violation or a threatened violation of Va. Code §§ 62.1-44.1555, 62.1-44.15:56'mar, without the necessity of showing that an adequate remedy at law does not exist. Page 21 of 24 However, an owner of property shall not apply for injunctive relief unless (i) he has notified in writing the person who has violated the local program, and the program authority, that a violation of the local program has caused, or creates a probability of causing, damage to his property, and (ii) neither the person who has violated the local program nor the program authority has taken corrective action within fifteen days to eliminate the conditions which have caused, or create the probability of causing, damage to his property. (d) In addition to any criminal penalties provided under this chapter, any person who violates any provision of this chapter may be liable to the Csounty in a civil action for damages. (e) Civil penalty enumerated. Without limiting the remedies which may be obtained in this section, any person violating or failing, neglecting, or refusing to obey any injunction, mandamus or other remedy obtained pursuant to this section shall be subject, in the discretion of the Csourt, to a civil penalty not to exceed two thousand dollars ($2,000.00) for each violation. A civil action for such violation or failure may be brought by the Csounty. Any civil penalties assessed by a Csourt shall be paid into the Ttreasury of the Csounty, except that where the violator is the locality itself, or its agent, the Csourt shall direct the penalty to be paid into the state treasury. (f) With the consent of any person who has violated or failed, neglected or refused to obey any regulation or condition of a permit or any provision of this chapter, the Csounty may provide for the payment of civil charges for violations in specific sums, not to exceed the limit specified in subsection (b)(2) of this section. Such civil charges shall be instead of any appropriate civil penalty which could be imposed under subsection (b) or (e). (g) The Csounty's Aattorney shall, upon request of the Csounty ^r the PGFMit Make legal action to enforce the provisions of this chapter. (h) Compliance with the provisions of this chapter shall be prima facie evidence in any legal or equitable proceeding for damages caused by erosion, siltation or sedimentation that all requirements of law have been met, and the complaining party must show negligence in order to recover any damages. Sec. 8.1-10. -Appeals and judicial review. Any applicant under the provision of this chapter who is aggrieved by any action of the Csounty or its agent in disapproving plans submitted pursuant to this chapter shall have the right to apply for and receive a review of such action by the Csounty S -board of Ssupervisors. In reviewing the agent's actions, the Board of Ssupervisors shall consider evidence and opinions presented by the aggrieved applicant and agent. After considering the evidence and opinions, the 134oard of Ssupervisors decision shall be Page 22 of 24 final, subject only to review by the Ceircuit Ceourt of the Ceounty. Any applicant who seeks an appeal hearing before the Board of Ssupervisors shall be heard at the next regularly scheduled B -board of Ssupervisors public hearing provided that the Bboard of Ssupervisors and other involved parties have at least thirty (30) days prior notice. Final decisions of the Ceounty under this chapter shall be subject to review by the Csounty Ceircuit Ceourt, provided an appeal is filed within thirty (30) days from the date of any written decision adversely affecting the rights, duties, or privileges of the person engaging in or proposing to engage in land -disturbing activities. Sec. 8-1.11. - Civil violations, summons, generally (a) The Ddirector of Community Development shall prepare an appropriate erosion and sediment control civil violation summons for use in enforcing the provisions of this chapter. (b) Any inspector of the VESCP plan approving authority charged with enforcing this chapter shall serve upon any owner or permittee in violation of this chapter, a summons notifying the owner or permittee of said violation. If unable to serve the owner or permittee in person, the inspector may notify by summons an owner or permittee committing or suffering the existence of a violation by certified, return receipt requested mail, of the infraction. The Ceounty Seheriffs office may also deliver the summons. The summons shall contain the following information: (1) The name and address of the person charged. (2) The nature of the violation and chapter provision(s) being violated. (3) The location, date, and time that the violation occurred, or was observed. (4) The amount of the civil penalty assessed for the violation. (5) The manner, location, and time that the civil penalty may be paid to the Ceou nty. (6) The right of the recipient of the summons to elect to stand trial for the infraction and the date of such trial. (c) The summons shall provide that any person summoned for a violation may, within five (5) days of actual receipt of the summons or, within ten (10) days from the date of mailing of the summons, elect to pay the civil penalty by making an appearance in person, or in writing by mail to the Csounty Treasurer's office and, by such appearance, may enter a waiver of trial, admit liability, and pay the civil penalty established for the violation charged and provide that a signature to an admission of liability shall have the same force and effect as a judgment in court; however, an admission shall not be deemed a criminal conviction for any purpose. Page 23 of 24 (d) If a person charged with a violation does not elect to enter a waiver of trial and admit liability, the Ceounty shall cause the Ssheriff of Csounty to serve the summons on the person charged in the manner prescribed by law. The violation shall be tried in Ggeneral D4istrict Csourt in the same manner and with the same right of appeal as provided for in Title 8.01 of the Code of Virginia. In any trial for a scheduled violation authorized by this section, it shall be the burden of the Csounty to show the liability of the violator by the preponderance of the evidence. Any admission of liability, or finding of liability shall not be a criminal conviction for any purpose. (e) The remedies provided for in this section are cumulative, and are not exclusive and, except as provided above, shall be in addition to any other remedies by law. (f) The owner or permittee may pay the civil penalty to the Ttreasurer prior to the trial date, provided he also pays necessary court costs in addition to the civil penalty. (g) Within the time period prescribed in (c), above, the owner or permittee, may contest the violation by presenting it to the Ddirector of Community Development, who shall certify the contest in writing, on an appropriate form, to the Ggeneral D4istrict Ceou rt. (h) Failure to pay the civil penalty, or to contest the violation, within the time period prescribed in (c), above, shall result in the immediate issuance of a stop work order and the revocation of the permit, if any. 2. That this ordinance shall be in full force and effect from and after its adoption. Page 24 of 24 ACTION NO. ITEM NO. 1-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY. VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution adopting revisions to the Stormwater Management Design Manual for Roanoke County to be effective October 5, 2015 SUBMITTED BY: APPROVED BY: Tarek Moneir Deputy Director of Development Services Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Roanoke County currently has a Stormwater Management Design Manual that supplements the adopted new stormwater management ordinance to assist engineers and developers to prepare development plans that meet County requirements. The manual revisions include: Require additional information for Stormwater Plans to improve review efficiency and recordkeeping. o Table of storm drainage pipes and inlets to summarize information o Requires the use of State Plane Coordinate system for horizontal control and NAVD 88 for vertical elevations. This replaces the use of arbitrary datums still used by many local engineers o Table of proposed channels to summarize information 2. Add section on residential lot grading and drainage o Require more grading information on initial subdivision site plans o Require plot plans to conform with approved initial grading plan Page 1 of 2 3. More fully detail the requirements for as -built (record) drawings o More consistent format to facilitate obtaining information for GIS o Provide more direction as to what is required on as built drawings o Requires submission of digital CAD files (to assist with GIS updates) The proposed changes will assist the County in implementing its post -construction responsibilities (periodic inspection). County staff has reviewed these changes with the Roanoke Regional Home Builders Association (RRHBA) and with the Board of Supervisors at a work session on August 25, 2015. Additionally, staff responded to the RRHBA concerns as contained in their latest letter (copies attached). FISCAL IMPACT: ►C•7iLa ALTERNATIVES: 1. Approve the attached resolution amending the Stormwater Management Design Manual 2. Deny the amendment as presented STAFF RECOMMENDATION: Staff recommends alternative 1. Attachment: • Stormwater Management Design Manual Proposed Changes Page 2 of 2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION ADOPTING REVISIONS TO THE STORMWATER MANAGEMENT DESIGN MANUAL FOR ROANOKE COUNTY WHEREAS, Section 23-1.8 of the Roanoke County Code provides for the adoption of a Stormwater Management Design Manual; and WHEREAS, Roanoke County will utilize the policies, criteria and information contained in this design manual for the proper implementation and requirements of the stormwater management ordinance; and WHEREAS, this design manual shall be authorized and approved by the Board of Supervisors by resolution. NOW, THEREFORE BE IT RESOLVED, by the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That the Stormwater Management Design Manual dated July 1, 2014, approved by the Board of Supervisors pursuant to the 2014 stormwater management is hereby repealed. 2. That the "Stormwater Management Design Manual" dated September 22, 2015, is hereby adopted in order to implement the requirements of Chapter 23. "Stormwater Management Ordinance", as provided in Section 23-1.8. 3. That this resolution shall be effective from and after September 22, 2015. Page 1 of 1 COUNTY OF ROANOKE STORMWATER MANAGEMENT DESIGN MANUAL September 22, 2015 Department of Community Development 5204 Bernard Drive SEPTEMBER 22, 2015 Roanoke, Virginia 24018 TABLE OF CONTENTS COUNTY OF ROANOKE STORMWATER MANAGEMENT DESIGN MANUAL PREFACE Roanoke County's intent is to comply with the state Stormwater Management Law and Regulations, through implementation of the Roanoke County Stormwater Management Ordinance. All BMPs proposed for use in the County must be previously approved by DEQ and they must be contained on the VA BMP Clearinghouse. This Design Manual has local requirements that aid in the implementing of the state requirements and that supplement the state requirements. This September 22, 2015 edition of the Design Manual replaces the July 1, 2014 Design Manual, as approved by the Board of Supervisors by Resolution xxxxxx-x. Due to the complexity of the subject, it is necessary for engineers and designers to be familiar with the information contained in all of the references listed in Section 1.8 of this manual. COUNTY OF ROANOKE 1 TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS Chapter 1 — Introduction 1.1 Manual Purpose.................................................................................................1-1 2-1 1.2 Water Programs Regulatory Background.......................................................1-1 2-2 2.3 1.2.1 Erosion and Sediment Control Program .................................................. 1-2 2.4 1.2.2 Stormwater Management Program.......................................................... 1-2 2.5 1.2.3 Floodplain Management Program............................................................ 1-2 2.6 1.2.4 Illicit Discharge Detection and Elimination Program .............................. 1-2 1.2.5 Municipal Separate Storm Sewer System (MS4) Permit ......................... 1-2 1.3 Contents of the Manual.....................................................................................1-3 1.4 Authority.............................................................................................................1-4 1.5 Applicability.......................................................................................................1-4 1.6 Administration...................................................................................................1-5 1.6.1 General.....................................................................................................1-5 1.6.2 Manual Amendments............................................................................... 1-5 1.6.3 Exceptions................................................................................................1-5 1.6.4 Appeal of Decisions................................................................................. 1-5 1.7 Approval and Permits........................................................................................ 1-5 1.7.1 Local Approvals and Permits................................................................... 1-5 1.7.2 Water and Sewer Approvals and Permits ................................................ 1-6 1.7.3 Joint Permit Application.......................................................................... 1-6 1.8 Reference Sources..............................................................................................1-6 1.8.1 County of Roanoke Code and Ordinances ............................................... 1-7 1.8.2 Virginia Law and Regulations................................................................. 1-7 1.8.3 Virginia Manuals, Handbooks and Websites ........................................... 1-7 1.9 Acronyms and Abbreviations...........................................................................1-8 Appendix 1A — Roanoke County Policy on Common Plan of Development or Sale Chapter 2 Stormwater Management Plan Review and Approval 2.1 Overview of the Review and Approval Process .............................................. 2-1 2.2 Concept Stormwater Management Plan Submittal ........................................ 2-2 2.3 Stormwater Management Master Plan Submittal .......................................... 2-2 2.4 Stormwater Management Plan Submittal....................................................... 2-2 2.5 Submittal of Stormwater Calculations.............................................................2-3 2.6 Changes and Modifications to an Approved Plan .......................................... 2-5 Chapter 3 Easements 3.1 General................................................................................................................3-1 3.2 Drainage Easements........................................................................................... 3-1 3.2.1 Culverts and Storm Drains....................................................................... 3-2 3.2.2 Open Channels......................................................................................... 3-3 3.3 Access Easements............................................................................................... 3-4 3.4 Maintenance of Easements................................................................................ 3-4 COUNTY OF ROANOKE 11 TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS Appendix 3A — Standard Easement Agreements Chapter 4 Stormwater Hydrology 4.1 References...........................................................................................................4-1 Appendix 4B 4.2 Design Frequencies............................................................................................ 4-1 4.2.1 General..................................................................................................... 4-1 4.2.2 Storm Drainage Systems.......................................................................... 4-1 4.2.3 Stormwater Management Facilities......................................................... 4-2 4.3 Time of Concentration (t,) and Travel Time(Tt)............................................ 4-2 4.3.1 General.....................................................................................................4-2 5-2 4.3.2 Overland Flow......................................................................................... 4-2 4.3.3 Shallow Concentrated Flow..................................................................... 4-3 4.3.4 Channelized Flow.................................................................................... 4-3 4.3.5 Pipe Flow................................................................................................. 4-4 4.4 Selection of Methodologies................................................................................ 4-4 4.4.1 General.....................................................................................................4-4 5-8 5.3 4.4.2 Peak Discharge Methods for Design of Storm Drainage Systems .......... 4-4 5.5 4.4.3 Hydrograph Methods for Design of Stormwater Management Facilities 4-4 4.5 Methodologies.....................................................................................................4-5 5-9 4.5.1 Rational Method....................................................................................... 4-5 4.5.2 Modified Rational Method....................................................................... 4-6 4.5.3 SCS Method.............................................................................................4-7 Appendix 4A — Design Aids, From Chapter 6, VDOT Drainage Manual Appendix 4B — Design Aids, From Chapter 4, VA SWM Handbook Appendix 4C — Information from VDOT Hydraulic Design Advisories Chapter 5 Open Channels 5.1 References...........................................................................................................5-1 5.2 Design Methodology and Criteria.................................................................... 5-1 5.2.1 Major and Minor Channels...................................................................... 5-1 5.2.2 Design Flow............................................................................................. 5-1 5.2.3 Hydrology................................................................................................ 5-2 5.2.4 Channel Hydraulics.................................................................................. 5-2 5.2.5 Channel Velocity..................................................................................... 5-2 5.2.6 Channel Slope.......................................................................................... 5-3 5.2.7 Cross Sectional Area................................................................................ 5-4 5.2.8 Channel Lining......................................................................................... 5-5 5.2.9 Freeboard Requirements.......................................................................... 5-7 5.2.10 Calculation of Depth of Flow at Bends and Curves ................................ 5-7 5.2.11 Channel Location and Width Restrictions on Residential Lots ............... 5-8 5.3 Environmental Considerations and Fishery Protection ................................. 5-9 5.5 Maintenance Requirements.............................................................................. 5-9 5.6 Floodplain Studies.............................................................................................. 5-9 COUNTY OF ROANOKE 111 TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS Appendix 5A — Aids for Open Channel Design, From Chapter 7, VDOT Drainage Manual Chapter 6 Culverts 6.1 References...........................................................................................................6-1 6.2 Design Methodology and Criteria.................................................................... 6-2 6.2.1 Computation Methods.............................................................................. 6-2 7-1 6.2.2 Hydrology................................................................................................ 6-2 6.2.3 Culvert Hydraulics................................................................................... 6-3 6.2.4 Structural Design..................................................................................... 6-6 7.2.5 Storm Drain Inlets.................................................................................... 7-4 6.2.5 Materials.................................................................................................. 6-6 6.2.6 Culvert Sizes............................................................................................ 6-7 6.2.7 End Conditions......................................................................................... 6-8 6.2.8 Multiple Barrel Culverts.......................................................................... 6-9 7-11 6.2.9 Culvert Skew............................................................................................ 6-9 7.2.10 Structural Design................................................................................... 6.2.10 Buoyancy................................................................................................. 6-9 Installation........................................................................................................ 6.2.11 Debris and Trash Racks......................................................................... 6-10 6.3 Installation........................................................................................................ 6-10 7.3.2 Backfill...................................................................................................7-13 6.3.1 Bedding Material................................................................................... 6-10 7.3.3 Separation of Utilities............................................................................ 6.3.2 Backfill...................................................................................................6-10 7.4 6.4 Environmental Considerations and Fishery Protection ............................... 6-10 6.5 Maintenance Requirements............................................................................ 6-11 Appendix 6A — Aids for Stormwater Culvert Design, From Chapter 8, VDOT Drainage Manual Chapter 7 Storm Drains 7.1 References...........................................................................................................7-1 7.2 Design Methodology and Criteria.................................................................... 7-1 7.2.1 Computation Methods.............................................................................. 7-1 7.2.2 Hydrology................................................................................................ 7-2 7.2.3 Design Flows........................................................................................... 7-2 7.2.4 Measures to Convey Stormwater Runoff to Inlets ................................... 7-3 7.2.5 Storm Drain Inlets.................................................................................... 7-4 7.2.6 Storm Drain Pipes.................................................................................... 7-6 7.2.7 Determination of Hydraulic Grade Line .................................................. 7-8 7.2.8 100 -Year Conditions.............................................................................. 7-11 7.2.9 Materials................................................................................................ 7-11 7.2.10 Structural Design................................................................................... 7-12 7.3 Installation........................................................................................................ 7-12 7.3.1 Bedding Material................................................................................... 7-13 7.3.2 Backfill...................................................................................................7-13 7.3.3 Separation of Utilities............................................................................ 7-13 7.4 Environmental Impacts................................................................................... 7-13 7.5 Erosion Protection at Outfalls........................................................................ 7-14 COUNTY OF ROANOKE iv TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS 7.6 Maintenance Requirements............................................................................ 7-14 Appendix 7A — Aids for Storm Drain System Design, From Chapter 9, VDOT Drainage Manual Appendix 7B — Installation Procedures Chapter 8 Residential Lot Drainage 8.1 References...........................................................................................................8-1 8.2 General Lot Grading......................................................................................... 8-1 8.3 Construction Plan Requirments....................................................................... 8-1 Chapter 9 Stormwater Detention 9.1 References...........................................................................................................9-2 9.2 Design Methodology and Criteria.................................................................... 9-2 9.2.1 Hydrology................................................................................................ 9-2 9.2.2 Design Flows and Storage Volumes........................................................ 9-2 9.2.3 Minimum Contributing Drainage Area .................................................... 9-2 9.2.4 Detention Facility Locations.................................................................... 9-3 9.2.5 Basin Grading.......................................................................................... 9-3 9.2.6 Embankments and Emergency Spillways ................................................ 9-4 10.3 9.2.7 Outlet Structures and Release Rates .................................................... 9-5 10.4 9.2.8 Omitted................................................................................................... 9-6 10.5 9.2.9 Landscaping........................................................................................... 9-7 10.6 9.2.10 Underground Detention......................................................................... 9-7 9.2.11 Trash Racks............................................................................................ 9-8 9.3 Environmental Impacts..................................................................................... 9-8 9.4 Maintenance Requirements.............................................................................. 9-8 Chapter 10 Energy Dissipation 10.1 References.........................................................................................................10-1 10.2 Design Methodology and Criteria..................................................................10-2 10.2.1 Outlet Velocity....................................................................................... 10-2 10.2.2 Erosion Control Stone............................................................................ 10-2 10.2.3 Riprap Outlet Basins.............................................................................. 10-2 10.2.4 Baffled Outlets.......................................................................................10-3 10.2.5 Energy Dissipator for Paved Areas ........................................................ 10-5 10.2.6 Additional Energy Dissipators............................................................... 10-5 10.3 Installation Requirements...............................................................................10-5 10.4 Easements.........................................................................................................10-5 10.5 Environmental Impacts...................................................................................10-5 10.6 Maintenance Requirements............................................................................10-5 Appendix 10A — Aids for Energy Dissipation Design, From VDOT Drainage Manual COUNTY OF ROANOKE v TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS Appendix 10B — Aids for Energy Dissipation Design, From VDOT Road and Bridge Standards Appendix 10C — Energy Dissipation Design Schematics Chapter 11 (NOT USED) Chapter 12 Environmentally Sensitive Areas 12.1 References.........................................................................................................12-2 12.2 Floodplains........................................................................................................12-3 14.3.2 Principal Spillways................................................................................ 14-7 14.3.3 Emergency Spillways............................................................................. 14-8 12.2.1 Applicant Flood Study Requirements .................................................... 12-4 14-10 12.2.2 Floodplain Delineation........................................................................... 12-5 12.3 Steep Slopes......................................................................................................12-6 14.3.8 Infiltration Practices............................................................................. 14-13 12.3.1 Development Restrictions...................................................................... 12-6 14.3.8.2 Infiltration Trench............................................................................. 12.3.2 Design Standards................................................................................... 12-6 12.4 Stream Buffers.................................................................................................12-7 14-16 12.5 Critical Erosion Areas.....................................................................................12-7 14.3.11 Grass Swale........................................................................................ 12.6 Karst Geology...................................................................................................12-8 14-19 12.7 Stormwater Hot Spots.....................................................................................12-8 12.7.1 Design Restrictions................................................................................ 12-9 12.7.2 Golf Course Development................................................................... 12-10 Chapter 13 Geotechnical Studies (RESERVED) Chapter 14 Maintenance of Stormwater Management Facilities 14.1 Responsibility for Maintenance......................................................................14-2 14.2 Maintenance Agreements................................................................................14-2 14.3 Maintenance Program.....................................................................................14-3 14.3.1 Earthen Embankments........................................................................... 14-6 14.3.2 Principal Spillways................................................................................ 14-7 14.3.3 Emergency Spillways............................................................................. 14-8 14.3.4 Sediment Forebay.................................................................................. 14-9 14.3.5 Landscaping......................................................................................... 14-10 14.3.6 Stormwater Detention and Retention Basins ....................................... 14-11 14.3.7 Constructed Wetlands.......................................................................... 14-12 14.3.8 Infiltration Practices............................................................................. 14-13 14.3.8.1 Infiltration Practices.......................................................................... 14-13 14.3.8.2 Infiltration Trench............................................................................. 14-14 14.3.8.3 Porous Pavement............................................................................... 14-15 14.3.9 Bioretention Filter.............................................................................. 14-16 14.3.10 Sand Filter.......................................................................................... 14-17 14.3.11 Grass Swale........................................................................................ 14-18 14.3.12 Vegetated Filter Strip......................................................................... 14-19 14.3.13 Manufactured BMP Systems............................................................. 14-20 COUNTY OF ROANOKE vi TABLE OF CONTENTS 9/22/15 TABLE OF CONTENTS 14.3.14 Conservation Area............................................................................. 14-21 14.3.15 Underground Detention Facilities...................................................... 14-22 14.4 Additional Maintenance and Repair............................................................14-22 14.5 Inspection and Maintenance Records..........................................................14-23 14.6 References.......................................................................................................14-23 Appendix 14A — Maintenance Agreements Chapter 15 Inspection and Enforcement 15.1 Construction Inspections.................................................................................15-1 15. 1.1 Notifications to the County of Roanoke ................................................ 15-1 15.1.2 Periodic Inspections............................................................................... 15-2 15.1.3 Final Inspection and As -Built Documentation ...................................... 15-3 15.1.4 ACAD Digital File Requirements.......................................................... 15-6 15.2 Post -Construction Inspections and Maintenance.........................................15-6 15.3 Records..............................................................................................................15-7 15.4 Enforcement.....................................................................................................15-7 15.4.1 Notice of Violation................................................................................ 15-7 15.4.2 Stop Work Orders.................................................................................. 15-8 15.4.3 Restoration of Land................................................................................ 15-8 Appendix 15A — Inspection Forms COUNTY OF ROANOKE vii TABLE OF CONTENTS 9/22/15 Chapter 1 - Introduction 1.1 Manual Purpose As land is developed and woodlands and pastures are converted to more intensive commercial and residential uses, the increase in impervious surfaces (pavements and buildings) and managed turf, cause adverse effects including: • Increased flooding • Increased erosion and deposition of sediment in streams • Less base flow in streams due to less groundwater recharge • Increased runoff of pollutants (nutrients, sediment, bacteria, oil) • Decreased stream biodiversity (e.g.,aquatic insects and fish) • Loss of recreational uses such as swimming and fishing The County of Roanoke stormwater management goals are to minimize these adverse effects of land development by implementing effective stormwater management Best Management Practices (BMPs) as required by the County Code for new development, and over time, by providing BMP measures to mitigate the adverse effects of past land development activities. The County of Roanoke Stormwater Management Design Manual, hereafter called the Design Manual, contains local requirements that supplement local ordinances, state regulations and guidance, and federal regulations. In general, direction and guidance from these sources is not repeated in this Design Manual. Refer to the listing of Reference Sources at the end of this chapter. 1.2 Water Programs Regulatory Background The County of Roanoke implements, and is regulated by, several water programs as briefly described below. Land Disturbing Activities are regulated under the erosion and sediment control, stormwater management, and floodplain management programs. Existing Development is regulated by the illicit discharge detection and elimination program and, if the property contains a permanent BMP, by the stormwater management program. The County of Roanoke itself is regulated by the MS4 Permit program. While the MS4 permit only directly regulates the County, it may indirectly impact anyone living in, owning property, or developing in the County of Roanoke through the impact of County actions that are required by its permit. COUNTY OF ROANOKE 9/22/15 1-1 INTRODUCTION 1.2.1 Erosion and Sediment Control Program The County is the local Erosion and Sediment Control (E&SC) authority. E&SC requirements are contained in the County of Roanoke Erosion and Sediment Control Ordinance and Virginia Erosion and Sediment Control Regulations. The County administers the program under the oversight of the Virginia Department of Environmental Quality (DEQ). 1.2.2 Stormwater Management Program The County is the local Virginia Stormwater Management Program (VSMP) authority. VSMP requirements are contained in the County of Roanoke Stormwater Management Ordinance and Virginia Stormwater Management Regulations. The County administers the program with oversight of the DEQ. The proper understanding of the meaning of "common plan of development or sale" is critical to understanding the applicability of stormwater management requirements for land disturbing activities. The County's policy concerning common plan of development or sale is contained in Appendix IA. 1.2.3 Floodplain Management Program The County regulates development in the floodplain through its Zoning Ordinance. This Program was developed and is administered to comply with Federal Emergency Management Agency requirements. 1.2.4 Illicit Discharge Detection and Elimination Program Except for specific limited exceptions, only uncontaminated stormwater may be discharged into stormwater systems. The County operates an Illicit Discharge Detection and Elimination Program in accordance with the County of Roanoke Illicit Discharge Ordinance, as required by its MS4 Permit. The DEQ provides oversight of this program. 1.2.5 Municipal Separate Storm Sewer System (MS4) Permit The County of Roanoke is regulated under a General Permit for Small Municipal Separate Storm Sewer Systems issued by the DEQ. MS4 permits generally impact urban areas and they require the locality to implement specific Minimum Control Measures (MCM) to protect local water quality. These MCM's generally fall into six (6) categories: 1. Public Education and Outreach on Stormwater Impacts 2. Public Involvement and Participation 3. Illicit Discharge Detection and Elimination 4. Construction Site Stormwater Runoff Control COUNTY OF ROANOKE 9/22/15 1-2 INTRODUCTION 5. Post Construction Stormwater Management 6. Pollution Prevention and Good Housekeeping for Municipal Operations The MS4 Permit also requires that the locality address water impairments that are identified by a Total Maximum Daily Load (TMDL) Study where the locality has been given a Waste Load Allocation (WLA). The County of Roanoke has WLA's for a number of its streams for impairments caused by sediment, bacteria, and PCB's. See the Roanoke County website, Department of Community Development, Stormwater Management page for more information concerning the MS4 Permit and TMDL's. 1.3 Contents of the Manual The Design Manual is divided into 15 chapters. An overview of each chapter is presented below. Chapter 1 — Introduction. Chapter 1 presents the general background and purpose behind the Design Manual. The chapter documents the goals of the program, the applicable requirements for stormwater management, and the administration of the program. Chapter 2 — Stormwater Management Plan Review and Approval. Chapter 2 presents the process that the applicant and the County of Roanoke follow to assure that the requirements of the stormwater management program and the Stormwater Management Ordinance are met. Chapter 3 — Easements. Chapter 3 establishes the requirements for easements for BMPs and storm drainage systems. Chapter 4 — Stormwater Hydrology. Chapter 4 documents the hydrologic design practices used to establish design flows necessary to design storm drainage systems and BMPs. Chapter 5 — Open Channels. Chapter 5 presents the requirements for open channel hydraulics, including cross section requirements, side slopes, widths, slopes, channel linings, and calculation methods. Chapter 6 — Culverts. Chapter 6 presents the requirements for culverts, including materials, slopes, headwater and tailwater limitations, and design calculation methods. Chapter 7 — Storm Drains. Chapter 7 presents the requirements for storm drains, including storm drain piping sizes, and lengths, and storm drain inlet hydraulics. Chapter 8 — Residential Lot Drainage. Chapter 8 presents the requirements for residential lot drainage by providing drainage and/or grading the land to direct surface drainage away from building and toward streets, drainage conveyance structures, or sheet flow. COUNTY OF ROANOKE 9/22/15 1-3 INTRODUCTION Chapter 9 — Stormwater Detention. Chapter 9 presents requirements and design criteria for stormwater storage facilities. Design criteria include location, sizing, requirements, site access, release rates, and spillway requirements. Chapter 10 — Energy Dissipation. Chapter 10 includes the requirements for velocity and energy reduction devices at the discharge from storm drains, culverts, open channels, and other stormwater management systems. Energy dissipation is required to prevent excessive velocities and erosion in downstream channels. Chapter 11 — NOT USED. Chapter 12 — Environmentally Sensitive Areas. Chapter 12 presents requirements for development of environmentally sensitive areas including floodplains, stream buffers, steep slopes, erodible soils, and stormwater pollutant hot spots. Chapter 13 — Geotechnical Studies. (RESERVED) Chapter 14 — Maintenance of Stormwater Management Facilities. Chapter 14 presents the requirements for establishing a maintenance program for stormwater management facilities, and the establishment of a maintenance agreement to assure that stormwater management facilities are properly maintained. Chapter 15 — Inspection and Enforcement. Chapter 15 presents the inspection and enforcement procedures to ensure that construction of stormwater management facilities comply with the approved plans and are properly maintained post -construction. 1.4 Authority The Design Manual provides supplemental information to implement the provisions of the County Code as they pertain to stormwater management, including storm drainage, and land development. In the event that any part of this Design Manual is held to be illegal or void, this shall not have the effect of making illegal or void the Design Manual in its entirety, or any section thereof, which shall remain effective. 1.5 Applicability The requirements of this Design Manual apply to all land disturbance activities requiring permits. Portions of this Design Manual apply to maintenance and repair of stormwater management facilities and other best management practices after construction is completed. COUNTY OF ROANOKE 9/22/15 1-4 INTRODUCTION 1.6 Administration 1.6.1 General The policies and procedures contained within this Design Manual shall be administered by the County of Roanoke, Director of Community Development (Director), or designee. 1.6.2 Manual Amendments This Design Manual may be periodically amended, as recommended by the Director of Community Development, or designee, and approved by the Board of Supervisors. Amendments to this Design Manual will be posted on the County website, and will become effective on the date listed on the website. It is the manual user's responsibility to check the website and verify that they have the latest requirements. 1.6.3 Exceptions Requests for exceptions of any provisions of this Design Manual shall be made in writing to the County of Roanoke, Director of Community Development_ The exception request shall clearly identify the Design Manual provision that is desired to be modified; the justification to support the issuance of an exception, and the alternative measures that are proposed to meet the intent of the Design Manual. All requests for an exception will receive a written response outlining the reasons for approval, or denial, after receipt of all information requested by the Director. In reviewing the request, the Director shall closely examine the proposed development and evaluate the variance request based on the conditions set forth in the Design Manual, County of Roanoke Code, Stormwater Management Ordinance; and the requirements and recommendations of the VA SWM Handbook, VDOT Drainage Manual, VA BMP Clearinghouse, and other sources. 1.6.4 Appeal of Decisions Appeals of decisions may be filed in accordance with the procedures provided in the County of Roanoke Code, Stormwater Management Ordinance. 1.7 Approvals and Permits The applicant is responsible for acquiring all required approvals and permits. 1.7.1 Local Approvals and Permits The review and approval of stormwater management plans shall be an integral part of the overall review of site plans. Local permits and approvals include Erosion and COUNTY OF ROANOKE 9/22/15 1-5 INTRODUCTION Sediment Control Approval, Virginia Stormwater Management Program Permit, Land Disturbance Permit, Zoning Permit, and Building Permit. Retaining walls with a height of 2' or greater require a building permit. 1.7.2 Water and Sewer Approvals and Permits Public water and sewer requires approval from either the Western Virginia Water Authority (WVWA) or the Town of Vinton, depending on the geographic location. If the site is located in the Town of Vinton or to the east of the Town of Vinton, within the Town of Vinton service area; then, Town of Vinton approval is required. If public water and/or sewer is located elsewhere in the County; then, WVWA approval is required. For areas not served by public water and sewer, local health department approval is required for wells and onsite sanitary sewage disposal. 1.7.3 Joint Permit Application Wetlands and streams are protected under several Federal and State programs. Whenever jurisdictional wetlands or streams are impacted by land disturbing activities, a Joint Permit Application must be completed and filed with the Virginia Marine Resources Commission (VMRC). VMRC will distribute the joint permit application to The U.S. Army Corps of Engineers (USACE) and the Virginia Department of Environmental Quality (DEQ). The USACE and DEQ will consult with other Federal and State agencies in processing the permit application. Upon receipt of an acceptable application the following permits may be issued: • USACE Federal Section 404 Permit • DEQ Water Protection Permit (VWP) • VMRC Permit Design Professional shall provide County of Roanoke a copy of the required wetland permit or written documentation that a wetland permit is not required by the USACE, DEQ, or a 3rd party professional experienced in wetland delineation. Plans shall show the surveyed wetland boundary delineation, provide geographic location of the wetland flags, provide acreage of wetlands, and linear footage of streams. Wetlands shall be numbered and flagged in the field. Wetland delineations shall be performed in accordance with the 1987 Corps of Engineers Wetland Delineation Manual and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Eastern Mountains and Piedmont Region. 1.8 Reference Sources Managing stormwater runoff from land disturbing activities and prior developed land is a complex issue. There are a number of laws, ordinances and guidance sources that those that design land disturbance activities (land development) must follow. COUNTY OF ROANOKE 9/22/15 1-6 INTRODUCTION The requirements and recommendations of the following sources, latest editions, are incorporated into this Design Manual by reference. All of the referenced sources are readily available on the internet. 1.8.1 County of Roanoke Code and Ordinances Design and construction of land disturbing activities shall comply with all relevant portions of the County of Roanoke Code including: • Stormwater Management Ordinance • Erosion and Sediment Control Ordinance • Illicit Discharge Ordinance • Zoning Ordinance • Subdivision Ordinance 1.8.2 Virginia Law and Regulations Design and construction of land disturbing activities shall comply with all relevant Virginia law and regulations including: • Virginia Stormwater Management Law • Virginia Erosion and Sediment Control Law • Virginia Stormwater Management Regulations • Virginia Erosion and Sediment Control Regulations 1.8.3 Virginia Manuals, Handbooks, and Websites • Virginia Stormwater Management Handbook, Hereafter throughout this Design Manual referred to as the VA SWM Handbook. • Virginia Department of Transportation Drainage Manual. Hereafter throughout this Design Manual referred to as the VDOT Drainage Manual. • Virginia Department of Transportation Road and Bridge Standards. Hereafter throughout this Design Manual referred to as the VDOT Standards. • Virginia Department of Transportation Road and Bridge Specifications. Hereafter throughout this Design Manual referred to as the VDOT Specifications. COUNTY OF ROANOKE 9/22/15 1-7 INTRODUCTION • Virginia Erosion and Sediment Control Handbook. Hereafter throughout this Design Manual referred to as the VA E&SC Handbook. • Virginia Stormwater Management BMP Clearinghouse website (htlp://vwrrc.vt.edu/swc. Hereafter throughout this Design Manual referred to as the BMP Clearinghouse. 1.9 Acronyms and Abbreviations For clarification, the following is a listing of abbreviations, and acronyms used in stormwater management and throughout this Design Manual. A — Drainage area, acres (stormwater hydrology) A — Cross section area, square feet (open channel or pipe hydraulics) B — VDOT rainfall coefficient, no units (stormwater hydrology) BMP — Best management practice C — Runoff coefficient, no units (stormwater hydrology) Cf — Saturation factor, no units (stormwater hydrology) CMP — Corrugated metal pipe CN — Curve Number (stormwater hydrology) USACE — U.S. Army Corps of Engineers D — VDOT rainfall coefficient, no units (stormwater hydrology) DCR — Virginia Department of Conservation and Recreation De — Critical duration, minutes (stormwater hydrology) DEQ — Virginia Department of Environmental Quality E — VDOT rainfall coefficient, no units (stormwater hydrology) FEMA — Federal Emergency Management Agency g — Gravity coefficient, 32.2 feet/s2 H — Height or depth of water, feet Hf, Hi, Hm, Ho, Ho — Head losses in piping and structures, feet (storm drain hydraulics) HDPE — High density polyethylene HGL — Hydraulic grade line I — Rainfall intensity, inches per hour (stormwater hydrology) Ipost — Post -development impervious cover, percentage (water quality Simple Method calculation) Iexisting — Existing impervious cover, percentage (water quality Simple Method calculation) K, Ki, Ko — Head loss coefficients for piping, no units Lp. — Pre -development pollutant loading, pounds per year (water quality Simple Method calculation) Lpost — Post -development pollutant loading, pounds per year (water quality Simple Method calculation) MS4 — Municipal Separate Storm Sewer System n — Manning's equation roughness coefficient, no units (open channel and pipe hydraulics) COUNTY OF ROANOKE 9/22/15 1-8 INTRODUCTION NFIP — National Flood Insurance Program Q — Stormwater flow, cubic feet per second (cfs) R — Hydraulic radius, feet (open channel hydraulics) r,� — Stream bend radius, center, feet (open channel hydraulics) ri — Stream bend radius, inside bank, feet (open channel hydraulics) ro — Stream bend radius, outside bank, feet (open channel hydraulics) S — Slope, feet per feet (open channel or pipe hydraulics) or as a percentage (%) SCS — Soil Conservation Service L — Time of concentration, minutes (stormwater hydrology) Tp — Time to peak flow, minutes (stormwater hydrology) Tr — Time to recede, minutes (stormwater hydrology) Tt — Travel time, minutes (stormwater hydrology) V, Vi, Vo — Velocity, feet per second (open channel and pipe hydraulics) VA E&SC Handbook — Virginia Erosion and Sediment Control Handbook, latest version, as amended VA SWM Handbook — Virginia Stormwater Management Handbook, latest version, as amended VDOT — Virginia Department of Transportation VDOT Drainage Manual — Virginia Department of Transportation, Drainage Manual, latest version, as amended VDOT Specifications — Virginia Department of Transportation, Road and Bridge Specifications, latest version, as amended VDOT Standards — Virginia Department of Transportation, Road and Bridge Standards, latest version, as amended VMRC — Virginia Marine Resources Commission VSMP — Virginia Stormwater Management Program, as administered by DEQ and Roanoke County AZ = Difference in water surface elevation from the inside curve to the outside curve of an open channel, feet (open channel hydraulics) COUNTY OF ROANOKE 9/22/15 1-9 INTRODUCTION APPENDIX IA POLICY CONCERNING COMMON PLAN OF DEVELOPMENT OR SALE COUNTY OF ROANOKE 9/22/15 IA -1 INTRODUCTION Policy Concerning "Common Plan of Development or Sale" 1A.1 General This policy explains how Roanoke County interprets and will apply "common plan of development or sale" in its local VSMP. In the event that this policy conflicts with any guidance issued by DEQ, DEQ guidance will govern. All land -disturbing activities, except those specifically exempted in Section 23-1.3 of the Roanoke County Stormwater Management Ordinance, require approval from Roanoke County as the local VSMP authority and coverage under the state General Permit for Discharges of Stormwater from Construction Activities prior to commencing land -disturbing activities. Several exemptions apply to land -disturbing activities that disturb less than one acre of land and that are not part of a larger common plan of development or sale. In order to properly apply these exemptions, it is necessary to understand what is meant by "common plan of development or sale." It is critical for developers and land -owners to understand that the permitting exemption can be lost by disturbing more area on a project than planned (exceeding 1 acre land - disturbance) or by taking actions that demonstrate that a small project (less than 1 acre land -disturbance) is part of a larger common plan of development or sale. Actions that increase land disturbance or that create a larger common plan of development after plan approval and during construction will necessitate securing a VSMP permit, may result in possible enforcement and penalty actions, and may result in additional costs and delays due to the need to redesign the site and construct or modify BMPs. Land disturbing activities that are exempt from the requirements of the Stormwater Management Ordinance may not be exempt from the Erosion and Sediment Control stormwater management requirements. Erosion and Sediment Control regulations could still require stormwater management to address Minimum Standard 19. 1A.2 State Definition and Guidance 9VAC25-870-10 defines common plan of development or sale in the following manner: "Common plan of development or sale" means a contiguous area where separate and distinct construction activities may be taking place at different times on different schedules. For the purposes of the VSMP regulations, individual lots within existing residential, commercial, or industrial site plans and subdivision plans that were platted prior to July 1, 2004 may be considered separate land -disturbing activities. COUNTY OF ROANOKE 9/22/15 INTRODUCTION IA -2 1A.3 Discussion and Application 1A.3.1 USEPA guidance(http://cfpub.epa.gov/npdes/fags.cfm?program id=6 ) A "larger common plan of development or sale" is a contiguous area where multiple separate and distinct construction activities may be taking place at different times on different schedules under one plan. For example, if a developer buys a 20 -acre lot and builds roads, installs pipes, and runs electricity with the intention of constructing homes or other structures sometime in the future, this would be considered a larger common plan of development or sale. If the land is parceled off or sold, and construction occurs on plots that are less than one acre by separate, independent builders, this activity still would be subject to stormwater permitting requirements if the smaller plots were included on the original site plan. The larger common plan of development or sale also applies to other types of land development such as industrial parks or well fields. A permit is required if one (1) or more acres of land will be disturbed, regardless of the size of any of the individually -owned or developed sites. 1A.3.2 The creation of a common plan of development or sale A common plan of development or sale comes into being when there is documentation showing plans or intent to disturb earth regardless of how many phases or how long it will take. Common documents that create a common plan of development include: (a) any announcement or documentation (marketing plans, sign, sales pitch, notice, etc.); (b) any physical demarcation (boundary signs, lot stakes) indicating construction may occur on a specific plot; (c) subdivision plats; or, (d) construction drawings. 1A.3.3 The completion of a common plan of development or sale Once a common plan of development or sale has been created, it remains in force until the contemplated development is substantially completed (less than one (1) acre remaining to be developed). There may be a time when a new developer will want to perform a land disturbing activity on an undeveloped parcel (that was created on or after July 1, 2004), and wants to know if a common plan of development or sale is still valid. In order for the new activity to not be a part of the original common plan of development or sale, it must meet 2 tests. Test 1: Was the original plan, including modifications, ever substantially completed with less than one (1) acre of the original common plan of development or sale remaining (e.g., less than one (1) acre remains to build out)? Test 2: Has there been a clearly identifiable period of time where there is no on- going construction, including meeting criteria for final stabilization? (Roanoke County, by this policy, sets the clearly identifiable period of time at one (1) year.) If the project meets the two tests, then it may be evaluated for permitting purposes on its individual merits. If it does not meet either of the two tests, then it remains part of the original common plan of development or sale, and it requires permit coverage. COUNTY OF ROANOKE 9/22/15 IA -3 INTRODUCTION 1A.3.4 Additional development on an individual parcel after the intended construction is completed When the intended construction on a parcel that is part of a larger common plan of development or sale is completed, any subsequent development or redevelopment of that parcel is considered a new plan of development. 1A.3.5 Effect of adding property to an existing project There are 2 cases where adding land to a project could have permitting impacts. Case 1: A common plan of development or sale has already been created and development of the common plan of development or sale is ongoing. The developer purchases additional property to incorporate into the development. The additional property would become part of the common plan of development or sale. Case 2: A developer subdivides a parcel to create a residential lot. The development of the lot will disturb less than 1 acre. No stormwater permit is required. Prior to a clearly identifiable period of time (1 year) where there is no on-going construction on the first lot, the developer creates a second lot from the original parcel (or markets additional homes prior to creating lots). The development of the second lot would disturb less than 1 acre; however, the development of the first lot and the second lot together would cumulatively disturb 1 acre or more. A larger common plan of development or sale has been created. A permit is required to cover the entire common plan of development or sale (both the construction on Lot 1 as well as Lot 2 and any subsequent lots). Construction on Lot I would need to halt until permitting is completed. Stormwater management requirements would need to be met for the entire common plan of development or sale. 1A.3.6 Timing for construction and ownership of BMPs for a common plan of development or sale The technical criteria for stormwater management must be applied to the entire common plan of development or sale. In some cases, portions of a common plan of development or sale may have BMPs with a higher efficiency of pollutant removal or stormwater volume or rate control than other portions of the common plan of development or sale. However, no portion of the common plan of development or sale shall be considered by the County to be completed or be allowed to be occupied until BMPs are completed and functioning that provide stormwater management for that portion of the common plan of development or sale adequate to meet minimum standards (e.g., the construction of BMPs cannot be deferred to a later phase, if the portion of the common plan of development or sale that is currently under construction does not have adequate BMPs to meet the stormwater management technical criteria). COUNTY OF ROANOKE 9/22/15 IA -4 INTRODUCTION BMPs that provide stormwater management for one individual parcel may be on the individual parcel and may be owned and maintained by the property owner of the individual parcel. At the developer's option, BMPs that provide stormwater management for one individual parcel may be made a property association's responsibility as described in the next paragraph. BMPs that provide stormwater management for more than one parcel must be owned and maintained by a property association, consisting of all property owners that are benefiting from the BMP. 1A.3.7 De minimus land disturbance Neither federal nor state definitions or guidance address de minimus land disturbance on a lot within a larger common plan of development or sale. It is obvious that at some point, minor land disturbing activities should not be regulated, within a larger common plan of development or sale; example — disturbance of 20 square feet, on a lot, to erect a temporary sign. For the purpose of implementing the VSMP, Roanoke County considers land disturbance of less than 2,500 square feet to be de minimus and will not fall under the VSMP regulations. If any additional land disturbance occurs on a lot, within a larger common plan of development or sale, within one (1) year of completing the original disturbance, the land disturbance area will be summed. If the summed land disturbance is greater than 2,500 square feet, then the total land disturbed must comply with the VSMP regulations. 1AA Examples 1A.4.1. Example 1 A residential subdivision was started after July 1, 2004. Only 60 of the 100 lots have been developed, with the remaining 40 lots constituting 1 acre or more. No development has occurred since around 2010. A developer intends to develop a vacant 1/2 acre lot. This situation applies to a vacant lot in accordance with Section M.3.3. The residential subdivision is a common plan of development or sale. While a clearly identifiable period of time of no construction has passed (Test #2), the project was never substantially completed (Test 91). Therefore, the developer requires a VSMP permit. 1A.4.2 Example 2 A residential subdivision was constructed around 2010. About 80 of the 100 lots have been developed, with the remaining 20 lots constituting 1 acre or more. The owner of one of the constructed homes intends to construct an addition to his home that will disturb 3,000 square feet. This situation applies to an individual parcel after intended construction has been completed in accordance with Section 1.3.4. The residential subdivision is a common plan of development or sale. However, the intended construction has been completed on this lot. Therefore, the addition is treated as a new development project. Since it disturbs less than I acre, no VSMP permit is required. COUNTY OF ROANOKE 9/22/15 IA -5 INTRODUCTION 1A.4.3 Example 3 A regional shopping center was built in the 1990s. It is currently marketing plans to develop several additional buildings in its parking lot. It anticipates that the buildings will be constructed one at a time. The anticipated disturbed area for the construction of each building is less than 1 acre, but the anticipated disturbed area for the construction of all of the additional buildings is over an acre. The common plan of development or sale occurred prior to July 1, 2004, and the original plan is completed. Each of the proposed buildings will disturb under I acre; however, since the 3 buildings are being marketed together, a new common plan of development or sale has been created and the construction of all three buildings must be considered as a single land -disturbing activity. A VSMP permit is required. 1A.4.4 Example 4 A regional shopping center was built in the 1990's. The owner intends to construct a building expansion that will disturb 0.8 acres. Just over a year after completion of the expansion, the owner of the regional shopping center decides to construct another building in its parking lot. The building construction will disturb 0.7 acres. The common plan of development or sale occurred prior to July 1, 2004, and the original plan is completed. The developer intends to construct a building expansion as a stand- alone project. The project will disturb less than I acre; therefore, no VSMP permit is required. After a distinct time period (I year) has passed with no construction activity, the developer decides to construct another building in its parking lot. Since a distinct time period (I year) has passed since the completion of the building addition, and since the new building is not part of the building expansion plan, and since less than I acre is disturbed, no common plan of development or sale is created and no VSMP permit is required. Note If the building expansion and additional building in the parking lot were part of an overall renovation plan that was intended to be constructed in phases, then a common plan of development or sale would have been created and a VSMP permit would have been required. 1A.4.5 Example 5 A congregation intends to build a new church in phases. Phase 1 is for a multipurpose sanctuary and parking and the construction will disturb 2 acres. Phase 2 is for a classroom expansion and its construction will disturb 0.5 acres. The phased church construction is a common plan of development or sale. A VSMP permit will be required for Phase I and Phase 2. COUNTY OF ROANOKE 9/22/15 IA -6 INTRODUCTION 1A.4.6 Example 6 A congregation intends to build a new wing for education use and expand the parking lot. No construction has been built for over a year. The construction will disturb 0.8 acres. The proposed project is separate from the original church construction; therefore, it is not part of a larger common plan of development or sale. Since disturbed area is less than I acre, no VSMP permit is required. 1A.4.7 Example 7 A developer has a plan approved that indicates that 0.9 acres will be disturbed. During construction, the developer actually disturbs 1.2 acres. The developer's plan indicates that less than I acre will be disturbed. Therefore, no VSMP permit was required. However, the developer actually disturbed over I acre. Therefore, the County issues a "Stop Work" order until a VSMP permit can be issued. A stormwater management plan meeting the stormwater management regulation technical requirements must be prepared and submitted, along with an executed and recorded maintenance agreement, revised performance security, and additional fees. The developer must ensure that an adequate SWPPP is prepared and available at the site. No further land -disturbance activities may occur until these items are completed and a VSMP permit is issued. The County may undertake other enforcement actions and penalties, depending on the circumstances. 1A.4.8 Example 8 An existing fast food restaurant is part of a partially developed commercial area. It plans a renovation that includes some parking lot changes and a small expansion to its seating area. The construction disturbed area is 0.7 acres. The commercial area is part of an active common plan of development or sale; however, the intended construction (fastfood restaurant) on this parcel has been completed. In accordance with Section ]A. 3.4, the renovation is a separate land -disturbing activity. Since less than I acre is disturbed, no VSMP permit is required. 1A.4.9 Example 9 A developer intends to construct a subdivision in two phases. He intends to develop Phase 1 first, followed by Phase 2. Since the subdivision is a common plan of development or sale, the two phases are treated as a single land disturbance activity and the determination of whether or not adequate stormwater management is being provided is analyzed for the subdivision as a whole. Stormwater management for the subdivision will be accomplished by a combination of BMPs on individual lots, to serve the individual lots; and BMPs intended to serve multiple lots. Due to the characteristics of COUNTY OF ROANOKE 9/22/15 IA -7 INTRODUCTION the site and the layout of the design, the overall plan indicates that the proposed BMPs for Phase 1 are not adequate to meet the pollutant removal requirements, but that with the construction of Phase 2, the overall effectiveness of the BMPs will be increased so they are adequate to meet the pollutant removal requirements for both Phase 1 and Phase 2 upon completion of Phase 2. The proposed plan is unacceptable in accordance with Section 1.3.6. Even though it is expected that portions of the common plan of development or sale will have more effective BMPs than other portions of the common plan of development or sale, and even though the common plan of development or sale is evaluated as a single land -disturbance activity; It is not acceptable to construct a portion of the common plan of development or sale without concurrent construction of adequate BMPs such that the technical requirements of the stormwater management regulations are met as each portion of the common plan of development or sale is completed. 1A.4.10 Example 10 A land -owner owns a parcel with existing public road frontage. The current zoning and subdivision requirements would allow for the parcel to be subdivided into 8 lots without the need for any additional public infrastructure. The property owner divides the parcel to create one 1/4 acre lot and constructs a single family house on it. Several years after completion of the single family house, the property owner divides the parcel again to create another 1/4 acre lot and constructs another single family house. Each project is separated by adequate time that they are independent projects and no VSMP permit is required. 1A.4.11 Example 11 A land -owner owns a 10 acre parcel with existing public road frontage. The current zoning and subdivision requirements would allow for the parcel to be subdivided into 8 lots without the need for any additional public infrastructure. The property owner divides the parcel to create one 1/4 acre lot and sells the individual lot to a developer to construct a single family house on it. After the property sale, the landowner posts a sign on his property stating that "land is available for development and that the owner will subdivide". The owner has created a larger common plan of development or sale by marketing development on his parcel. The developer may continue with his project to construct a single family house, since the property was sold to him prior to the creation of the larger common plan of development or sale. However, any further construction on the land- owner's parcel will require a VSMP permit. COUNTY OF ROANOKE 9/22/15 IA -8 INTRODUCTION STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL CHAPTER 2 Chapter 2 — Stormwater Management Plan Review and Approval In order to maintain the character and integrity of neighborhoods, to promote excellence of development, to prevent undue traffic and environmental hazards, and to encourage the most harmonious development and use of land, a site development plan, including a storm water management plan and sediment control plan, is required for commercial and residential development and shall be submitted to the County of Roanoke's Department of Community Development. Plans should be submitted in compliance with the Digital Plan Submission Guide policy. (http://www.roanokecountyva.gov/index.aspx?NID=317) These plans will be distributed to the appropriate departments and divisions for review and approval. When required, the applicant is also responsible for submittals to the Virginia Department of Transportation, Virginia Department of Environmental Quality, Western Virginia Water Authority, Town of Vinton, and other applicable regulatory agencies for their review and approval. When applicable, all of these entities must approve the site development plan prior to the issuance of any permits for all types of developments as required by the Zoning Ordinance, Subdivision Ordinance, Erosion and Sediment Control Ordinance, and Stormwater Management Ordinance. In cases where jurisdictional waters exist on the proposed site, the applicant may need to obtain approvals and/or permits from any or all of the following agencies: the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency, the Virginia Department of Environmental Quality (DEQ), and the Virginia Marine Resource Commission (VMRC). It is the responsibility of the applicant to obtain all necessary permits from USACE, DEQ, VRMC, etc and provide Roanoke County with a copy of the required permit(s). Approval of plans by Roanoke County does not alleviate the applicant's liability of obtaining the required permit(s). 2.1 Overview of the Review and Approval Process No application for land development, land use conversion, or land disturbance can be approved, and no permits issued, without all of the elements required for a VSMP permit, as more fully described in the County Stormwater Management Ordinance and 9VAC25-870- 55. These elements generally include a permit application, erosion and sediment control plan, stormwater management plan, stormwater maintenance agreement, performance bond, fees, and executed development agreements. An agreement in lieu of a stormwater management plan may be accepted for a detached single family residence. The submittal, review, and approval of site development plans, including stormwater management plans will follow the Roanoke County Land Development Procedures. This document is available from the County of Roanoke Department of Community Development website (http://www.roanokecountyva.gov/index.aspx?NID=317). COUNTY OF ROANOKE STORMWATER MANAGEMENT PLAN 9/22/15 REVIEW AND APPROVAL 2-1 STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL CHAPTER 2 2.2 Concept Stormwater Management Plan Submittal A concept site development plan, including a concept stormwater management plan, is strongly encouraged by the County of Roanoke when the proposed development meets any of the conditions set forth in the Roanoke County Land Development Procedures. A concept site plan or concept stormwater management plan may also be submitted for any project at the applicant's option. If submitted, the concept site development plan, including a concept stormwater management plan, should addressed items as outlined in Roanoke Coup . 's Land Development Procedures. 2.3 Stormwater Management Master Plan Submittal A stormwater management master plan and calculations are required for all phased projects that are part of a common plan of development. The master plan shall address grading, stormwater conveyance, and stormwater management BMPs for the overall development. The master plan is required to be approved prior to issuance of any permits. Each phase must provide adequate stormwater treatment to address the stormwater requirements for each individual phase. The Stormwater Master Plan shall show how the Engineer will address stormwater management requirements for the entire project. At a minimum, the plans shall show the overall development, the location and type of the proposed BMPs required to treat the entire development, and contours. Additionally, the Designer shall provide applicable drainage areas to the BMPs and provide an accompanying VRRM worksheet to support the overall design. The final stormwater management master plan shall be appropriately sealed and signed by a licensed professional in adherence to all minimum standards and requirements pertaining to the practice of that profession as required in the VA Stormwater Management Regulations. 2.4 Stormwater Management Plan Submittal An approved site development plan and a local VSMP permit, is executed agreement in lieu of a stormwater management plan, is required prior to issuance of any other permits. The final stormwater management plan shall be appropriately sealed and signed by a licensed professional in adherence to all minimum standards and requirements pertaining to the practice of that profession as required in the VA Stormwater Management Regulations. The VSMP permit application information will be reviewed by the County of Roanoke. In addition to Roanoke County's review, the Virginia Department of Transportation may also review the site development plan with the stormwater management plan, as appropriate. Plans for review by these entities must be submitted directly to them, when required. COUNTY OF ROANOKE 9/22/15 2-2 STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL CHAPTER 2 All commercial projects or sites within a common plan of development that disturb between 0.90 and 0.99 acres shall provide point(s) with northing and castings to delineate the disturbance limits on the plans. The plans shall include a note that the disturbance limits are required to be delineated by a surveyor in the field and orange safety fence shall be installed to mark the delineation. All plans required for single family projects that are part of a common plan of development or commercial projects shall be prepared using the State Plane Coordinates and NAVD 88. Single family projects that are not part of a common plan of development and do not require as-builts nor a flood study are not required to be tied to the State Plane Coordinate System. 2.5 Submittal of Stormwater Calculations Calculations shall be submitted to the County of Roanoke supporting the stormwater management and storm drainage design. Calculations shall be well organized and coordinated with the design to allow for efficient review by the County. Calculations shall be bound together in a booklet or stapled together, depending on the number of pages. Each page of calculations should include the date, revision date, and unique page number. Calculations shall follow the following general format: • Cover Sheet — The cover sheet shall contain the project name, property tax parcel(s) number(s), applicant's name, design professional's name, calculation date, and (for final calculations) the seal and signature of the design professional. • Table of Contents — A table of contents shall be provided where the calculations exceeds 25 pages, or where appropriate to assist the reviewer in locating information in the calculations. • Introduction — A general description of the project providing information to assist the reviewer in understanding the nature and scope of the project and of the storm drainage and stormwater management facilities that are proposed. This should also explain existing and proposed conditions. • Criteria and Methodology — A listing of the basic design criteria for water quality compliance, channel protection, flood protection, and TMDL (where appropriate). • References — A listing of references that are used in the calculations • Assumptions —A listing of all assumptions, and justification of the assumptions that are used in the calculations. • Analysis — The body of the calculations clearly labeled as to what stormwater BMPs or storm drainage system the calculations are for. The calculations shall be step-by- step to ensure that a reviewer that is not familiar with the project can follow the COUNTY OF ROANOKE 9/22/15 2-3 STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL CHAPTER 2 progression of the calculations. If computer printouts are provided highlight the input and output information and ensure that the input information is clearly supported in the calculations, and that the output is properly evaluated in the summary and conclusions. All calculation parameters must be fully supported and documented and include the design storm frequency, intensity and duration, times of concentration maps (including segment lengths, elevations, slopes, and flow types), soil curve numbers or runoff coefficients; calculations identifying pre -and post -development peak runoff rates and total runoff volumes for each watershed area, infiltration rates (where applicable), culvert, storm drain, and open channel capacities, flow velocities, data on the increase in rate and volume of runoff for the specified design storms, pre - and post -development phosphorous runoff rates and all other calculations needed to support the proposed design. • VRRM Worksheet — A digital copy of the VRRM worksheet shall be submitted with the plan submittal. Roanoke County uses an annual rainfall of 42" for all projects located within Roanoke County and precipitation rates from the NOAA precipitation chart for the Roanoke County Airport. • Drainage Area Maps — Drainage area maps shall be provided for storm drainage inlets and BMPs. Pre and post drainage area maps shall be provided. • Summary and Conclusions — A summary of the results, preferably in tabular or chart form for each storm drain system and stormwater BMP to indicate that the land disturbing project meets County requirements and any conclusions. Provide Qi, Q2, and Qio for pre and post conditions. • Appendices and Attachments — Any supporting information such as pre -developed and post -developed drainage area maps, soils maps, U.S.G.S. quadrangle maps, NOAA precipitation chart, design nomographs, and computer printouts. Drainage maps must be clearly delineated and labeled to indicate the amount of area draining to each BMP and storm drainage inlet. • Storm drainage table shall be provided on the grading sheet with the horizontal layout of the pipes. The tables shall contain the structure number, rim elevation, inverts, length, pipe size and material, slope, which structure it drains to, and VDOT structure number. Calculations that are not well organized and coordinated with the design shall be reiected and the submittal shall not be reviewed until proper calculations are submitted. COUNTY OF ROANOKE 9/22/15 2-4 STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL CHAPTER 2 2.6 Changes and Modifications to an Approved Plan Changes to an approved subdivision or site plan, including an approved stormwater management plan, must be formally submitted for review to the County of Roanoke Department of Community Development at the counter with the Permit Technicians or via Roanoke County's FTP site. The County of Roanoke, upon receipt of the resubmittal of an approved development plan, shall review and approve or disapprove the resubmitted plan according to the Roanoke County Land Development Procedures. Approval or disapproval of the resubmitted plan shall be made in writing to the applicant. Any use, arrangement, location, or construction not in compliance with the approved plan is a violation of the County Code. COUNTY OF ROANOKE 9/22/15 2-5 STORMWATER MANAGEMENT PLAN REVIEW AND APPROVAL EASEMENTS Chapter 3 - Easements 3.1 General This manual addresses three types of easements: • Private drainage easements; • Public drainage easements; and • Access Easements CHAPTER 3 Easements may be required as a part of a subdivision plat or site plan review. The purpose of this section is to provide policy, procedures, and guidelines for establishing easements for storm drainage and BMPs. Easements may grant certain rights and privileges to the County or other public entity such as VDOT for public easements, or to specific landowners and/or the County in the case of private easements. Proposed easements will be shown conceptually on preliminary site plans. The easements will be in final form on the submitted stormwater management plan and will be consistent with the design on final plats and site plans. Easements shall be dimensioned to allow them to be located in the field by providing dimensional ties to property corners, or centerline bearings and distances. Where easements are aligned with property lines, offset dimensions will be provided. Verification of easement locations will be required as a part of the as -built drawing requirements. If drainage or BMPs are found to have been constructed outside of the easement; then, the permittee will be responsible for vacating the original easement and recording a new easement, in the proper location, at the permittee's expense. Easements should not split property lines. Where an open channel or storm drain system runs parallel to a property line, it should be offset from the property line an adequate amount so that the easement is totally contained on the property that contains the open channel or storm drain and not be split onto the adjacent property. This provision allows construction of fences at the property line. All easements, shall connect to public access points. Easements shall be wide enough, and shall be located to allow convenient access for inspection and repairs, regardless of the minimum widths given herein. 3.2 Drainage Easements Public drainage easements giving the County or a public entity such as VDOT the right to discharge stormwater runoff onto private property is required for all public storm drainage systems and BMPs that are located on private property. This includes open channels, culverts, inlets, storm drains, stormwater management basins, and other best management COUNTY OF ROANOKE 9/22/15 3-1 EASEMENTS EASEMENTS CHAPTER 3 practices that are owned, operated, and maintained by the County or other public entity such as VDOT. Public storm drainage systems are used to convey stormwater drainage from public property, public right-of-way, or another public storm drainage system through private property. Once the stormwater is discharged into a perennial or intermittent stream, or is otherwise managed, a public drainage easement is not required. Public BMPs are used to provide appropriate stormwater management for stormwater runoff generated by land development on public property. Examples of situations where a public drainage easement is required include: • Concentrated stormwater runoff from a County or County School Board owned site discharging to private property, including any open channels leaving the property or any storm drains leaving the property. • Concentrated stormwater runoff from public streets and open channels or storm drains from the public street right-of-way which passes onto any private property. Private drainage easements giving a private party the right to discharge concentrated stormwater runoff onto downstream private property is required whenever connection is made to a downstream private storm drainage system. No buildings, foundations, structures, fences or walls, not associated with the storm drainage system or BMP shall be located within a drainage easement. In addition, easements that contain open channels shall not be obstructed by fences or unmanaged vegetation. The closest edge of a storm drainage easement shall not be located within 10 feet of the rear wall of any individual single-family residential structure, except where the easement is required to access a BMP that is solely serving the single-family residence. Underground utility lines and structures shall be kept at least 5 -feet horizontal from drainage pipes, structures, and channels, except at utility crossings. Utility crossings at drainage easements shall be at as near 90-degress as possible. Where a storm drainage system terminates or starts short of a property line, adequate drainage easements shall be dedicated to allow for maintenance and future extension of the system through the property. 3.2.1 Culverts and Storm Drains The minimum width of drainage easements for culverts and storm drains shall be as follows: COUNTY OF ROANOKE 9/22/15 3-2 EASEMENTS EASEMENTS Pipe Size (width) Minimum Easement Width Smaller than 36" 20 feet 3611-4211 25 feet 48" — 60" 30 feet 6611-7811 35 feet CHAPTER 3 Minimum width given above is for installations with depths of cover of 10 -feet or less (measured at the top of pipe). For each additional 5 -feet of cover over 10 -feet (rounded up), the minimum easement width shall be increased by 10 -feet. For pipes that are larger than given in the table above, and for installations that result in minimum easement widths greater than 50 -feet due to installation depths, the minimum easement width shall be set by the County based on the width requirements to access the pipe in the future for repair. Drainage easements at the inlet and outlet of all culverts and storm drain inlets shall include the areas inundated by the headwater during the 100 -year storm. The easement shall extend a minimum of 10 feet from culvert inlets and outlets and storm drain inlets to allow for maintenance access. Where steep slopes and/or deep fills exist, additional easement area may be required to allow for proper access. Storm drain easements shall cross private driveways at perpendicular angles to the extent practical. 3.2.2 Open Channels The minimum width of the drainage easement required is dependent on the top width of the channel as indicated in Figure 3-1. The County may require wider easement width, if the open channel is located in rough terrain and additional width is required for access for inspection or repair. Figure 3-1 Minimum Easement Width for Open Channels DEPTH OF PROPOSED CHANNEL COUNTY OF ROANOKE 9/22/15 EASEMENT WIDTH TOP WIDTH r 0' OF CHANNEL WIDTH OF BOTTOM 3-3 PROPOSED CHANNEL EASEMENTS EASEMENTS 3.3 Access Easements CHAPTER 3 Access easements giving the County the right to access private property for the purpose of inspecting, and if necessary to maintain or repair private BMPs is required for all private BMPs. This includes stormwater management basins, filter strips, bioretention trenches, underground detention areas, and all other BMP's. All structures, pond areas, embankments, inlet and outlet channels, and access and working areas necessary to inspect, maintain, and repair the facilities shall be included in access easements. The 100 -year flooding area of all stormwater basins or other holding structures shall be contained within the access easement area. In addition, all BMPs shall contain a minimum 20 -foot working area around all stormwater management basins and a minimum 10 -foot working area around all other BMPs and an access easement connecting to a public road. Depending on the size and location of the stormwater management facility, more than one vehicle accessible access easement connecting to a public road may be required. All stormwater structures and BMPs shall be accessible by vehicle. Areas within an access easement that are intended to be vehicle accessible shall have a maximum slope of 10 percent for unpaved surfaces and 18 percent for paved surfaces. The vehicle access shall be a minimum of 12 feet in width. The minimum width for an access easement shall be 20 feet. All access easements shall connect to a public road or right of way; unless a suitable blanket access easement is provided. 3.4 Maintenance of Easements Ownership of land within easements shall remain with the property owner. The property owner shall have the responsibility of maintaining the easement areas free of any obstructions or use that would interfere with the rights or privileges granted by the property owner. The property owner shall not alter the existing ground elevations or in any way redirect or obstruct stormwater flow. Any alterations to easements resulting in obstruction or redirection of flow will be returned to existing elevations immediately at the cost of the property owner. COUNTY OF ROANOKE 9/22/15 3-4 EASEMENTS EASEMENTS APPENDIX 3A STANDARD EASEMENT AGREEMENTS County of Roanoke — Permanent Drainage Easement Agreement COUNTY OF ROANOKE 9/22/15 3A-1 APPENDIX 3A EASEMENTS EASEMENTS APPENDIX 3A Exemption Claimed: Grantee is exempted from recordation taxes and fees pursuant to § 58.1- 81 lA(3), Code of Virginia. Prepared By: Tax Map No.: Property Owners: THIS DEED OF EASEMENT, made this day of 120 , by and between AND (whether one or more, "Grantor") and the BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA ("Grantee"). WITNESSETH: That for and in consideration of the sum of One Dollar ($1.00), paid in hand at and with the execution and delivery of this Deed of Easement, and other good and valuable consideration, the receipt, adequacy and sufficiency of which is hereby acknowledged, the Grantor does hereby GRANT and CONVEY with General Warranty and Modern English Covenants of Title unto the Grantee, its successors and assigns, the following described easement, to -wit: A perpetual RIGHT and EASEMENT, approximately feet in width, to construct, operate, maintain, inspect and repair or replace a drainage system and related improvements including slope(s), if applicable, together with the right of ingress and egress thereto from a public road, upon, over, under, and across a tract or parcel of land belonging to the Grantor, acquired by deed dated and recorded in the Clerk's Office of the Circuit Court of Roanoke County, Virginia, in Deed Book , page , and designated on the Roanoke County Land Records as Tax Map No. (the "Property"). The location of said easement is more particularly described on the plat attached hereto as "Exhibit A" and by this reference made a part hereof (the "Plat"), and shown traversing as shown on Exhibit A. The Grantee agrees to restore and repair any actual damage to Grantor's Property which may be directly caused by the construction, reconstruction, or maintenance of said project except as hereinafter provided. The Grantor agrees that the Grantee will not be expected to restore the Property to the identical original condition, but rather as near thereto as is practicable, and that the Grantor will cooperate with the Grantee in effectuating such restoration. It is expressly agreed between the parties hereto that the Grantee and its agents shall have the right to inspect the easement herein granted and to cut, clear, and remove all undergrowth, obstructions, or improvements lying within, or upon said easement, that in any way endanger or interfere with the proper use of the same. The Grantor covenants that no building or structure shall be erected upon or within the easement herein granted or placed in such location as to render the said easement inaccessible. In the event that this covenant is violated, the Grantee COUNTY OF ROANOKE EASEMENTS 9/22/15 3A-2 EASEMENTS APPENDIX 3A shall not be obligated to repair, replace, or otherwise be responsible for such improvements if damaged or removed. The Grantor acknowledges that the plans for the aforesaid project as they affect the Property have been fully explained to the Grantor or Grantor's authorized representative. The fixtures, facilities, lines, utilities, and any other improvements placed upon, under, or across the Property by the Grantee shall remain the property of the Grantee. The easement herein granted is in addition to, and not in lieu of, any easement or right-of-way now in existence or which may be acquired in the future. The Grantor covenants and aggress for themselves, and for their heirs, successors, successors in title, executors, legal representatives, and assigns that the consideration aforementioned and the covenants herein shall be in lieu of any and all claims to compensation and damages by reason of the location, construction, operation, maintenance, or reconstruction of or within the easement herein granted. The grant and provision of this Deed of Easement shall constitute a covenant running with the land for the benefit of the Grantee, its successors and assigns forever to have and hold unto the Grantee, its successors and assigns forever. , County Administrator, or his designee, of Roanoke County, Virginia, hereby joins in the execution of this instrument to signify the acceptance by said Board of Supervisors of the real estate conveyed herein pursuant to Ordinance No. adopted by the Board of Supervisors of Roanoke County, Virginia, on the day of IN WITNESS WHEREOF, the parties hereto have caused this agreement to be executed on their behalf. GRANTOR: (SEAL) (Name) (Name) GRANTOR ACKNOWLEDGMENT State of: County/City of- , to wit: COUNTY OF ROANOKE EASEMENTS 9/22/15 3A-3 EASEMENTS APPENDIX 3A The foregoing instrument was acknowledged before me this , day of , , by: and (Notary Public Signature) (Notary Public Printed Name) My Commission expires: Registration # BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA: (SEAL) (County Administrator of Roanoke County, Virginia) COUNTY ACKNOWLEDGMENT State of: County/City of: to wit: The foregoing instrument was acknowledged before me this , day of , , by , County Administrator, on behalf of the Board of Supervisors of Roanoke County, Virginia. (Notary Public Signature) My Commission expires: COUNTY OF ROANOKE 9/22/15 3A-4 (Notary Public Printed Name) Registration # (SEAL) EASEMENTS STORNIWATER HYDROLOGY Chapter 4 - Stormwater Hydrology CHAPTER 4 Stormwater hydrology defines the means and methods to calculating stormwater runoff from a designated area. This section documents the hydrologic practices used to establish design flows necessary to prepare the required stormwater peak flow and storage calculations. 4.1 References Except where more stringent requirements are presented in this Design Manual, stormwater hydrology shall comply with state requirements. The primary design references are: • VDOT Drainage Manual • VA SWM Handbook • BMP Clearinghouse 4.2 Design Frequencies 4.2.1 General Design frequencies shall be selected consistent with good engineering practice and economics. The design frequency requirements given in this Design Manual are minimum, specific conditions may dictate that less frequent design frequency should be used. 4.2.2 Storm Drainage Systems Storm drainage systems consist of manmade open channels, culverts, and storm drains. Designs shall be based on the following minimum design storm frequencies: Manmade Open Channels: Minor Channel Capacity 10 -year Minor Channel Protective Lining (Drainage Area 5 acres or less) 2 -year Minor Channel Protective Lining (Drainage Area over 5 acres) 10 -year Major Channel Capacity 100 -year Major Channel Protective Lining 10 -year (100 -year if potential for catastrophic failure) COUNTY OF ROANOKE 9/22/15 4-1 STORMWATER HYDROLOGY STORMWATER HYDROLOGY Culverts: Principal Arterial Roads Other Roads Storm Drains CHAPTER 4 25 -year 10 -year 10 -year All storm drainage designs for open channels, culverts, and storm drains shall be checked for the 100 -year flow condition where there is the possibility of flooding residences, commercial or industrial buildings, overtopping primary roads, experiencing significant economic loss, or catastrophic failure. Where justified by the consequences of failure, the minimum design frequency shall be increased. 4.2.3 Stormwater Management Facilities Designs shall be in accordance with the VA SWM Handbook and BMP Clearinghouse. 4.3 Time of Concentration (t,-) and Travel Time (Tt) 4.3.1 General Time of Concentration (t) is the length of time required for a drop of water to travel from the most hydraulically distant point in the watershed, or subwatershed to the point of analysis. Travel Time (T) is the length of time required for that same drop of water to travel from the study point at the bottom of the sub - watershed to the study point at the bottom of the whole watershed. The travel time is descriptive of the sub -watershed by providing its location relative to the study point of the entire watershed. Therefore Time of Concentration is the summation of Travel Time values for the various consecutive flow segments. Travel Time and Time of Concentration generally consist of four flow types - overland flow, shallow concentrated flow, channelized flow, and pipe systems. Calculations shall be reviewed for reasonableness and the results shall be revised if needed to provide a reasonable velocity and flow time that will best represent the study area. When designing a drainage system, the flow path is not necessarily the same before and after land disturbing activities have been completed. Therefore, the travel time path shall be reflective of the actual conditions both before and after the land disturbing activities. In some cases, runoff from a portion of the drainage area that is highly impervious may result in a greater peak discharge than would occur if the entire area were COUNTY OF ROANOKE 9/22/15 4-2 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY CHAPTER 4 considered. In this case, adjustments can be made to the drainage area by disregarding those areas where flow time is too slow to add to the peak discharge. To prevent small drainage areas from skewing the time of concentration calculation results, when establishing sub drainage areas for analysis, the largest sub drainage area shall be no greater than 5 times the area of the smallest sub drainage area. Time of concentration maps shall include segment lengths, elevations at beginning and end of segment, slopes, and flow types. 4.3.2 Overland Flow Overland flow is flow that occurs at the upper end of a watershed, where flow is not concentrated and there are no channels. The length of overland flow shall be reflective of actual conditions and shall normally be no greater than 150 feet. Where the overland flow does not contain any slopes exceeding 5% AND if the soils are not designated as highly erodible, a maximum length of overland flow of 200 feet may be used. Highly erodible soils are designated as United States Department of Agriculture Natural Resources Conservation Service land capability classification (LCC) classes IIIe, IVe, VI, VII, or VIII or having an erodibility index greater than or equal to 8. Overland flow shall be calculated using the Seelye chart contained in the Appendix 4A for the Rational Method or TR -55 for the SCS Method. Roughness coefficients (Manning's n) for sheet flow can be found in the TR -55 Manual. 4.3.3 Shallow Concentrated Flow Shallow concentrated flow is the flow that occurs when minor rivulets form just downstream from the overland flow. The maximum allowable length for shallow concentrated flow shall be 1000 feet. Shallow concentrated flow shall be calculated using the Overland Flow Velocity Chart from HEC -19 or by using the nomograph entitled "Time of Concentration of Small Drainage Basins," developed by P.Z. Kirpich. Copies of the Kirpich chart and nomograph are contained in Appendix 4A and shall be used for the Rational Method. TR -55 shall be used for the SCS Method. Results from the Kirpich nomograph shall be multiplied by 0.2 for paved channels. 4.3.4 Channelized Flow Channelized flow occurs where stormwater flow converges in gullies, ditches, and natural or man-made water conveyances, including storm drain pipes and culverts. COUNTY OF ROANOKE 9/22/15 4-3 STORMWATER HYDROLOGY STORMWATER HYDROLOGY CHAPTER 4 Channelized flow shall be calculated by use of the nomograph entitled "Time of Concentration of Small Drainage Basins," developed by P.Z. Kirpich. A copy of the nomograph is contained in Appendix 4A and shall be used for the Rational Method. TR -55 shall be used for the SCS Method. Results from Kirpich nomographs shall be multiplied by 0.2 for paved channels. 4.3.5 Pipe Flow Pipe flow is the flow that occurs through culverts and storm drains. Use full -flow pipe velocities, unless it may be demonstrated that the pipe will operate at partial full conditions. If it can be shown that the pipe will operate at partial full conditions, then the partial full pipe velocity may be used. Design of flow through culverts is presented in Chapter 6. Design of flow in storm drain systems is presented in Chapter 7. 4.4 Selection of Methodologies 4.4.1 General There are a variety of widely used hydrologic methodologies. Each has its strengths and weaknesses. In the interest of standardizing hydrologic calculations, the following methodologies will be used for all projects, unless the County agrees that good engineering practice dictates the use of another method. 4.4.2 Peak Discharge Methods for Design of Storm Drainage Systems The Rational Method may be used to design storm drainage conveyance systems for drainage areas up to 200 acres. Minimum time of concentration when using the Rational Method is 5 minutes. The SCS method may be used for drainage areas up to 10 square miles. For drainage areas greater than 10 square miles, calculations shall be performed using at least two separate methods as described in the VDOT Drainage Manual (SCS method, regression equations, and/or stream gage data). The design peak flow shall be selected based on a professional evaluation of the results of the various methods. 4.4.3 Hydrograph Methods for Design of Stormwater Management Facilities The SCS method shall be used in the design of stormwater BMPS and ponds. Minimum time of concentration when using the SCS method is 6 minutes. COUNTY OF ROANOKE 9/22/15 4-4 STORMWATER HYDROLOGY STORMWATER HYDROLOGY 4.5 Methodologies CHAPTER 4 Following is an abbreviated discussion of each method. Refer to the VDOT Drainage Manual and the VA SWM Handbook for a more complete discussion. 4.5.1 Rational Method A. General The Rational Method is expressed as: Q = CfCIA Where: Q = Peak flow rate of runoff, cubic feet per second (cfs) Cf = Saturation factor C = Runoff coefficient representing a ratio of runoff to rainfall (dimensionless) I = Average rainfall intensity for a duration equal to the time of concentration for a selected return period, inches per hour (in/hr) A = Drainage area contributing to the design location, acres (ac) B. Saturation Factor The saturation factor (Cf) is an adjustment factor for modifying the runoff coefficient (C) for storms that are less frequent than a 10 -year recurrence interval. The product of Cf and C should not be greater than 1.0. Recurrence Interval (Years) Cf 2, 5, and 10 1.0 25 1.1 50 1.2 100 1.25 Where the product of Cf and C is greater than 1.0, use 1.0. C. Runoff Coefficient The runoff coefficient (C) is a variable of the Rational Method that requires significant judgment and understanding for proper selection. A range of C - values for a given land use is given in Appendix 4A. COUNTY OF ROANOKE 9/22/15 4-5 STORMWATER HYDROLOGY STORMWATER HYDROLOGY CHAPTER 4 The coefficient must account for all the factors affecting the relation of peak flow to average rainfall intensity other than area adjustment. Some of these factors include land slope, condition of cover, and antecedent moisture condition. As the slope of the drainage basin increases, the selected C -value should also increase. The lower range of C -values should be used where the majority of the slopes are less than 2 -percent. The average range of C -values should be used where the majority of slopes are 2 to 5 -percent. The higher range of C - values should be used where the majority of the slopes are greater than 5 - percent. The higher range of C -values should be used in clayey and other less pervious soil areas. D. Average Rainfall Intensity See the VA SWM Handbook. An IDF curve file is located on the Roanoke County webpage for use with HydroCAD and Hydraflow at htlp://www.roanokecouniyva.gov/index.aspx?NID=317 Cf factors are not included for Qts and Qioo in the IDF files and should be accounted for the calculations. E. Drainage Area Drainage area (DA) is measured in acres and is determined from evaluating a topographic map of the area. 4.5.2 Modified Rational Method A. General The Modified Rational Method is a means to generate hydrographs for small drainage areas. The parameters for the calculation are the same as the Rational Method, except that a series of average rainfall intensities from different storms with the same frequency and different durations are computed. The hydrograph from the critical duration storm is used to design stormwater management facilities. The Modified Rational Method recognizes that the duration of a storm is often longer than the time of concentration. This longer duration storm, even though it produces a lower peak Q, can produce a larger volume of runoff than the storm duration equal to the actual time of concentration of the drainage COUNTY OF ROANOKE 9/22/15 4-6 STORMWATER HYDROLOGY STORMWATER HYDROLOGY CHAPTER 4 area. In order to ensure the proper design of stormwater management facilities, the runoff for the critical storm duration shall be used. B. Hydrograph Assumptions The hydrograph generated by the Modified Rational Method is based on the following assumptions: • Time of Concentration (te) = Time to Peak (Tp) = Time to Recede (Tr) • The length of the critical duration storm (De) is from 0 minutes until the time of selected duration. • The rate of runoff is 0 at time 0 minutes. The rate of runoff increases linearly with time until the peak rate of runoff is reached at time Tp. • The peak rate of runoff is maintained from time Tp until the duration of the storm (De). The rate of runoff then decreases to 0 at time De plus Tr. • The peak rate of runoff is based on the average rainfall intensity (I) for the given storm duration. C. Critical Duration Storm The critical duration storm is the storm of a given frequency that has a duration that yields the greatest volume of storage in a stormwater management facility when the storm hydrograph is routed through the stormwater management facility. The critical duration storm may be estimated for preliminary purposes; however, the actual critical duration storm must be determined by routing the various duration storm hydrographs through the stormwater management facility and demonstrating which storm duration gives the greatest volume of storage. 4.5.3 SCS Method A. General The SCS Method may be used for computing peak flows and hydrographs for storms of selected return frequencies. This approach considers the time distribution of the rainfall, the initial rainfall losses to interception and depression storage and an infiltration rate that decreases during the course of a storm. The information required to use the SCS Method to determine the peak rate of runoff, or to develop a runoff hydrograph is: COUNTY OF ROANOKE 9/22/15 4-7 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY CHAPTER 4 • 24-hour total rainfall, and rainfall distribution type. The 24 hour precipitation rate is based upon NOAA values at the Roanoke Airport. These values can be found on Roanoke County's website or NOAA's website. • Time of Concentration (tc) in minutes, rounded up to the nearest whole minute; • Curve Number (CN), which is determined by Cover Types and Hydrologic Soils Groups; and • Drainage Area (A) in acres. If the drainage basin is over 20 acres, or if it contains areas of different land uses, the drainage basin should be divided into sub -basins. Each sub -basin should have similar land uses. When sub -basins are used, the following information is required to use the SCS Method to determine the peak rate of runoff, or to develop a runoff hydrograph: • 24-hour total rainfall, and rainfall distribution type. The 24 hour precipitation rate is based upon NOAA values at the Roanoke Airport. • Time of Concentration (t,) in minutes for each sub -basin, rounded up to the nearest whole minute; • Curve Number (CN), which is determined by Cover Types and Hydrologic Soils Groups, for each sub -basin; • Drainage Area (A) in acres, for each sub -basin; and • Travel Time (Tt) of the flow from each sub -basin as it flows through downstream sub -basins. If the SCS Method is being used to design a stormwater management facility, the following additional information is required to rout the runoff hydrograph through the facility and to generate an outflow hydrograph: • Elevation — Storage Relationship • Elevation — Discharge Relationship COUNTY OF ROANOKE 9/22/15 4-8 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY CHAPTER 4 B. 24-hour Rainfall and Distribution The 24-hour rainfall is determined by NOAA precipitation amounts for Roanoke Airport. C. Curve Number The SCS method uses a combination of soil conditions and land use (ground cover) to assign a runoff factor to an area. These runoff factors, or runoff curve numbers (CN), indicate the runoff potential of an area. The CN requires significant judgment and understanding for proper selection. A table containing CNs for various cover types and soils conditions is contained in Appendix 4A. When calculating existing rates of runoff (pre -construction), assume that all cover types are in good hydrologic condition. Hydrologic Soils Groups (HSG) include types A, B, C, and D, with type A being the most permeable and type D the least permeable. Appendix 4B includes a listing of most soil names with their respective hydrologic soils types. Urban/udorthents soils shall be considered a Type D soil for design purposes. Soils maps for the Roanoke Valley may be obtained by referring to USDA web soil survey. Colored soil maps with support HSG documentation shall be included in the calculations packet D. Drainage Area Drainage areas for each sub -basin should be identified on an appropriate topographic map. E. Elevation — Storage Relationship When runoff hydrographs are being routed through a stormwater management facility, the relationship between the elevation (or depth) of stored water in the facility and storage volume needs to be known and input into the calculation. Often this information is obtained by determining the pond area bounded by contour lines on a grading plan. Enough data pairs (elevation — storage) must be provided to properly model conditions at transition points. F. Elevation — Discharge Relationship When runoff hydrographs are being routed through a stormwater management facility, the relationship between the elevation (or depth) of stored water in the facility and the discharge flow rate from the facility needs to be known and COUNTY OF ROANOKE 9/22/15 4-9 STORMWATER HYDROLOGY STORMWATER HYDROLOGY CHAPTER 4 input into the calculation. The development of this relationship requires an understanding of the design conditions and underlying hydraulic principles. The hydraulic principals and equations governing the discharge rate will often change several times at varying elevations. These include weir flow, orifice flow, culvert inlet control, culvert outlet control, open channel flow, and possible effects from downstream backwater. 4.7 Drainage Area Analysis To prevent the undersizing of stormwater management components, upstream properties conditions shall be considered in the drainage area analysis. Stream channel and improvements to any conveyance system shall be analyzed. When a project site contains or is divided by multiple drainage areas, stormwater management of each drainage area must be addressed separately. Over detention of one flow is not an effective solution to achieving water quantity goals. Improving the channel immediately downstream is not effective in controlling the actual flow release from the site being developed, nor does it reduce the impact of the flow on properties further downstream. COUNTY OF ROANOKE 9/22/15 4-10 STORMWATER HYDROLOGY STORMWATER HYDROLOGY APPENDIX 4A DESIGN AIDS FROM CHAPTER 6, VDOT DRAINAGE MANUAL Overland Flow Nomagraph — Seelye Overland Flow Velocity Time of Concentration for Small Drainage Basins — Kirpich Average Velocities for Estimating Travel Time for Shallow Concentrated Flow Rational Method Runoff Coefficients Runoff Curve Numbers for Urban Areas Runoff Curve Numbers for Cultivated Agricultural Areas Runoff Curve Numbers for Other Agricultural Areas COUNTY OF ROANOKE 9/22/15 4A-1 APPENDIX 4A STORMWATER HYDROLOGY STORNIWATER HYDROLOGY OVERLAND FLOW - SEELYE 900 800 700 600 Pawed 400 03 APPENDIX 4A T, = 0. 5LOA. S -0,19C-1.0 T�YOverland Flow "Gime, minutes L=Length of Strip, feet S=Slope, foot/foot C=Rational "C" Value k0 -35-- T, 5-- 30- 0- 25- 25 20- 2O_ 300 -.-.,' 0.7 0. Bare p.5 200 oi[ Poor C.4 Grass w`- - Surface LL Qlcrage Grass —0- l 00 glace ,. SO Dpnsfi € 70 Crass _.. Cn ___ .` 5O z w 40 0 r r > � ca - c� 30 LL- Ld _ U-1 z 0 1< a- z k0 -35-- T, 5-- 30- 0- 25- 25 20- 2O_ 9, 15- 2-0 F�- 5,t� � w 10 €3 A i OVERLAND EL7 FLOW TIME 9- S_ 7 REPRINTEC WITH PERMISSION FP?OM "DATA BOOK FOR 01VIL eNGIN m' VOL. 1- 13ESIGN Er s EDITION (1951) 6Y E. ESEELYE COUNTY OF ROANOKE 9/22/15 4A-2 STORMWATER HYDROLOGY 0. OVERLAND EL7 FLOW TIME 9- S_ 7 REPRINTEC WITH PERMISSION FP?OM "DATA BOOK FOR 01VIL eNGIN m' VOL. 1- 13ESIGN Er s EDITION (1951) 6Y E. ESEELYE COUNTY OF ROANOKE 9/22/15 4A-2 STORMWATER HYDROLOGY STORMWATER HYDROLOGY OVERLAND FLOW VELOCITY .1 z z .5 t �o s U) Ld APPENDIX 4A 3 5 10 z0 r -n 30 zo COUNTY OF ROANOKE 9/22/15 5 3 ,5 M 2 Z 5 fQ 20 VELOWY , V (FT d SEC) 4A-3 STORMWATER HYDROLOGY STORMWATER HYDROLOGY TIME OF CONCENTRATION - KIRPICH (Note: Multiply Tc by 0.2 for Paved Channels) wr APPENDIX 4A 7._. nw rIm , O1N19TES R H (7) jE- 500 Fa 0 RETar FT F JPQ Fr. L.EIV15TH t 3JIM 17, 300 11 NE OF CCUCEN7RATION =14 MIN. 2klo 150 ac 30 LL. lI'i J •_J } .i rder. 3 z H Chi Friigiew t. Val- W Nu. [t June 1940. p. TC (MIN) :2®V 1 30 19rdoo 3RO 200 151 120 1J38 FO 40 39 2Z 1s 1� 8 5 4 3 2 TIME OF CONCENTBATION OF SMALL 11RAINABE BASINS S COUNTY OF ROANOKE 9/22/15 4A-4 STORMWATER HYDROLOGY .5090 ogee Lj 1 1 3RO 200 151 120 1J38 FO 40 39 2Z 1s 1� 8 5 4 3 2 TIME OF CONCENTBATION OF SMALL 11RAINABE BASINS S COUNTY OF ROANOKE 9/22/15 4A-4 STORMWATER HYDROLOGY � �ssl� fly■ ■ice ice! �el�l�l�� ■l mm �mwsmm#� �■rf■■I��it■��4 IWIIIIIHIIIMoroi ■IIIIII lMIUNRI�yJ Milli 11111■ 11YANIN kill] Iliffuri1 U, 1;1 �■■a■mma.i.■■a■■■lrsmjwa�d== �ftv sees �asrr�w■r■■s sa�■rr.rrr■a•� stair r�r�� ■■� � �a■�a�� ae�au■�a� a■r■■ �rus�®i■■■a li �� ■t■t■��ir rr� #rte Iglllr�f �■1 iii■■ ��'a� � ■F!■1 ■ W 1 n*i�p n ��� :���ww■r�r�ar�� ��ant■■nlnu =ON WAR MINIM 11111 NO ■E.. �nlmlllnlnllmvm� ■■ M■ 111RUIIIIINHOSE■■■� ■■ �i1111�E1 IIII�� �'�� �■�� ii■ I■ Iii �i f» �l�'� STORNIWATER HYDROLOGY RATIONAL METHOD - RUNOFF COEFFICIENTS APPENDIX 4A Description of Area Runoff Coefficients Business: Industrial and Commercial 0.80-0.90 Apartments and Townhomes 0.65-0.75 Schools 0.50-0.60 Residential - Lots 10,000 sf 0.40-0.50 - Lots 12,000 sf 0.40-0.45 - Lots 17,000 sf 0.35-0.45 - Lots > 1/z acre 0.30-0.40 Parks, Cemeteries, and Unimproved Areas 0.20-0.35 Paved and Roof Areas 0.90 Gravel 0.90 Pervious Pavement Varies** Cultivated Areas 0.50-0.70 Pasture 0.35-0.45 Lawns 0.25-0.35 Forest 0.20-0.30 Steep Grass 2:1 * 0.40-0.70 Shoulder and Ditch Areas * 0.35-0.50 cnm m en tg 1.The lowest range of runoff coefficients may be used for flat areas (areas where the majority of the grades and slopes are 2% and less). 2.The average range of runoff coefficients should be used for intermediate areas (areas where the majority of the grades and slopes are from 2% to 5%). 3.The highest range of runoff coefficients shall be used for steep areas (areas where the majority of the grades are greater than 5%), for cluster areas, and for development in clay soil areas. 4. The residential runoff coefficients include impervious and pervious amounts in the coefficient. * Lower runoff coefficients should be used for permanent or established conditions (post - construction), i.e. sizing stormwater management basins. * Higher runoff coefficients should be used to design roadside ditch linings (construction). The design considers the ditch lining as not yet established. ** Based upon Manufacturer's recommendation and BMP Clearinghouse specifications. COUNTY OF ROANOKE 9/22/15 4A-6 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY RUNOFF CURVE NUMBERS FOR URBAN AREAS APPENDIX 4A COUNTY OF ROANOKE 9/22/15 4A-7 STORMWATER HYDROLOGY Soil Group A B C D Cover type and hydrologic condition Open space (lawns, parks, golf courses, cemeteries): Poor condition (grass cover < 50%) 68 79 86 89 Fair condition (grass cover 50% to 75%) 49 69 79 84 Good condition(grass cover > 75% 39 1 61 1 74 80 Impervious areas: Paved parking lots, roofs, driveways(excluding right-of-way) 98 98 98 98 Streets and roads: Paved; curbs and storm drains (excluding right-of-way) 98 98 98 98 Paved; open ditches (including right-of-way) 83 89 92 93 Gravel (including right-of-way) 76 85 89 91 Dirt(including right-of-way) 72 82 87 89 Urban districts: Commercial and business (85% average impervious area) 89 92 94 95 Industrial 72% average impervious area 81 88 91 93 Residential districts by average lot size: 0.10 or less, town houses (65% average impervious area) 77 85 90 92 1/4 acre (38% average impervious area) 61 75 83 87 1/3 acre (30% average impervious area) 57 72 81 86 1/z acre (25% average impervious area) 54 70 80 85 1 acre (20% average impervious area) 51 68 79 84 2 acre 12% average impervious area 46 65 77 82 Developing urban areas: Newly graded areas (pervious areas only, no vegetation) 1 77 1 86 1 91 1 94 COUNTY OF ROANOKE 9/22/15 4A-7 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY RUNOFF CURVE NUMBERS FOR CULTIVATED AGRICULTURAL AREAS APPENDIX 4A Cover Treatment Hydrologic Soil Grou type condition A B C D Fallow Bare soil -- 77 86 91 94 Crop residue Poor 76 85 90 93 Cover (CR) Good 74 83 88 90 Row Crops Straight Row (SR) Poor 72 81 88 91 Good 67 78 85 1 89 SR and CR Poor 71 80 87 90 Good 64 75 82 85 Contoured (C) Poor 70 79 84 88 Good 65 75 82 86 C and CR Poor 69 78 83 87 Good 64 74 81 85 Contoured & Terraced Poor 66 74 80 82 (C & T) Good 62 71 78 81 C&T and CR Poor 65 73 79 81 Good 61 70 77 80 Small Grain SR Poor 65 76 84 88 Good 63 75 83 87 SR and CR Poor 64 75 83 86 Good 60 72 80 84 C Poor 63 74 82 85 Good 61 73 81 84 C and CR Poor 62 73 81 84 Good 60 72 80 83 C&T Poor 61 72 79 82 Good 59 70 78 81 C&T and CR Poor 60 71 78 81 Good 58 69 77 80 Close -seeded SR Poor 66 77 85 89 or broadcast Good 58 72 81 85 Legumes or C Poor 64 75 83 85 rotation Good 55 69 78 83 Meadow C&T Poor 63 73 80 83 Good 51 67 76 80 Comments: Crop residue cover (CR) applies only if residue is on at least 5% of the surface throughout the year. Poor = Factors impair infiltration and tend to increase runoff Good = Factors encourage average and better than average infiltration and tend to decrease runoff. COUNTY OF ROANOKE 9/22/15 4A-8 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY RUNOFF CURVE NUMBERS FOR OTHER AGRICULTURAL AREAS Comments: APPENDIX 4A Cover Hydrologic Soil Group A B C D type condition Pasture', grassland, or range- Poor 68 79 86 89 continuous forage for grazing Fair 49 69 79 84 Good 39 61 74 80 Meadow — continuous grass, 30 58 71 78 protected from grazing and generally mowed for hay Brush' — brush -weed -grass mixture Poor 48 67 77 83 with brush as the major element Fair 35 56 70 77 Good 30 48 65 73 Woods — grass combination Poor 57 73 82 86 (orchard or tree farm) Fair 43 65 76 82 Good 32 58 72 79 Woods3 Poor 45 66 77 83 Fair 36 60 73 79 Good 30 55 70 77 Farmsteads — buildings, lanes, 59 74 92 86 driveways, and surrounding lots PasturePoor < 50% ground cover or heavily grazed with no mulch Fair 50% to 75% ground cover and not heavily grazed Good > 75% ground cover and lightly or only occasionally grazed Brush Poor < 50% ground cover Fair 50% to 75% ground cover Good > 75% ground cover Woods Poor — Forest litter, small trees and brush are destroyed by heavy grazing or regular burning Fair — Woods grazed but not burned, and some forest litter covers the soil Good — Woods protected from grazing, litter and brush adequately cover soil COUNTY OF ROANOKE 9/22/15 4A-9 STORMWATER HYDROLOGY STORMWATER HYDROLOGY APPENDIX 4B APPENDIX 4B DESIGN AIDS FROM CHAPTER 4, VA SWM HANDBOOK Rational Equation Coefficients for SCS Hydrological Soil Groups, Urban Land Uses Rational Equation Coefficients for SCS Hydrological Soil Groups, Rural and Agricultural Uses Roughness Coefficient "n" for Manning Equation — Sheet Flow Roughness Coefficient "n" for Manning Equation — Pipe Flow Roughness Coefficient "n" for Manning Equation — Constructed Channels Roughness Coefficient "n" for Manning Equation — Natural Stream Channels Hydrologic Soils Names in Virginia (7 sheets) COUNTY OF ROANOKE X/1/15 4B-1 STORMWATER HYDROLOGY +0000NN �O O O O O O O O O O c) -:t 01 N �c A N O O, 110 all N 110 l— M M M M N N O O O O O O O O O o O O 0 N M O o0 110 A O O O O O O O O O O + O -t � N o0 I'DN -� c dl N�r— M M M M M N O O O O O O O O O o O� 00 N O l� Vl N O 110 l M N N N N U O O O O O O O O O O o O, N� r M M M N N O O O O O O o O "O 01 ,O M ^� Ic 01 — \O N N N N O O O O O O O O O o _ _ A O O O O O O O O O O O S.r + 110 N 01 -- I'D l M N N N N O 0 0 0 0 0 0 O O O O 110 l N N N N ^� O N O O O O O O O O O O S.r N 01 "O -t N 011 O �o l N N — — x d o 0 6 0 0 0 0 0 0 0 0 z � U •� 5 � O I••I �� U CL aj U Cd M m --i cd cd N N 01011 + o0 oo O v') r— O I'D — "o �O O 0 0 0 0 0 0 0 O O O O O O o M O V'1 o0 \O \O o0 M V'1 o0 V'1 O -:t 00 l 110 V'1 l 110 V'1 110 110 V'1 N O 6 0 0 0 0 0 0 O O O O O O 00 l— \O W" l— \O W" \O V'1 W" A O O 0 6 6 0 0 0 0 O O O O O O 00 M — N — O O — 01 00 \O \O kn \O \O kn \O Vl 0 0 0 O O O O O O 00 V'1 01 00 O 00 o0 00 00 l— �O i N O 6 0 0 0 0 0 0 O O O O O O U 0 0 0 0 0 0 0 0 0 O O O O O O o N — — — l� V'1 't M 't't M M M M �O O 0 0 0 0 0 0 0 O O O O O O o O 110 00 V'1 V'1 V'1 00 V'1 Vl N U N O 0 0 0 0 0 0 0 O O O O O O 00 O M M O 00 0 0 0 0 0 0 O O O O O O O S.r + 6 0 0 0 0 0 0 O O O O O O i o O 11 A N O O1 00 O O N O 0 0 0 0 0 6 6 O O O O O O O it I'0 m:t m:t r - x 0 0 0 0 0 0 0 0 0 O O O O O O a U •O w p Ni. • "" •� � O O O , O O O -0 , O ..O O O O O O O O O O O O O O O O x v CJ LJ CJ CJ C,7 CJ CJ CJ CJ CJ CJ CJ � O 'C 'C 7O O 7O 7O O U O �3 �3 U Ua U v U O 0 0 0 0 0 0 0 0� p•I C, Ln i/) 00 0 C o —Cd o� a � ':rw UO *4 o un STORNIWATER HYDROLOGY ROUGHNESS COEFFICIENT "n" FOR MANNING EQUATION - SHEET FLOW COUNTY OF ROANOKE 9/22/15 Surface Description n Smooth Surfaces (Concrete, 0.011 Asphalt, Gravel, or Bare Soil) Fallow (no residue) 0.05 Cultivated Soils: Residue Cover < 20% 0.06 Residue Cover > 20% 0.17 Grass: Short Grass Prairie 0.15 Dense Grasses 0.24 Bermuda Grass 0.41 Range (Natural) 0.13 Woods: Light Underbrush 0.40 Dense Underbrush 0.80 4B-4 APPENDIX 4B STORMWATER HYDROLOGY STORMWATER HYDROLOGY ROUGHNESS COEFFICIENT "n" FOR MANNING EQUATION - PIPE FLOW Material "n" Range From I To Coated Cast Iron 0.010 0.014 Uncoated Cast Iron 0.011 0.015 Vitrified Sewer Pipe 0.010 0.017 Concrete Pipe 0.013 Common Clay Drainage Tile 0.011 0.017 Corrugated Metal (2 2/3 x '/2) 0.023 0.026 Corrugated Metal (3x1 and 6x1) 0.026 0.029 Corrugated Metal (6x2 structural plate) 0.030 0.033 HDPE 0.012 COUNTY OF ROANOKE 9/22/15 4B-5 APPENDIX 4B STORMWATER HYDROLOGY STORMWATER HYDROLOGY APPENDIX 413 ROUGHNESS COEFFICIENT "n" FOR MANNING EQUATION - CONSTRUCTED CHANNEL Lining Material "n" Range From To Concrete Lined 0.012 0.016 Cement Rubble 0.017 0.025 Earth, Straight and Uniform 0.017 0.022 Rock Cuts, Smooth and Uniform 0.025 0.033 Rock Cuts, Jagged and Irregular 0.035 0.045 Winding, Sluggish Canals 0.022 0.027 Dredged Earth Channels 0.025 0.030 Canals with Rough Stony Beds, 0.025 0.035 Weeds on Earth Banks Earth Bottom, Rubble Sides 0.028 0.033 Small Grass Channels: Long Grass — 13" 0.042 Short Grass — 3" 0.034 COUNTY OF ROANOKE 9/22/15 4B-6 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY APPENDIX 4B ROUGHNESS COEFFICIENT "n" FOR MANNING EQUATION - NATURAL STREAM CHANNEL Channel Lining "n" Range From To 1. Clean, Straight Bank, Full Stage 0.025 0.030 No Rifts or Deep Pools 2. Same as 91, Some Weeds and Stones 0.030 0.035 3. Winding, Some Pools and Shoals, 0.033 0.040 Clean 4. Same as 93, Lower Stages, More 0.040 0.050 Ineffective Slope and Sections 5. Same as #3, Some Weeds and Stones 0.035 0.045 6. Same as 94, Stony Sections 0.045 0.055 7. Sluggish River Reaches, Rather 0.050 0.070 Weedy with Very Deep Pools 8. Very Reedy Reaches 0.075 0.125 COUNTY OF ROANOKE 9/22/15 4B-7 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY APPENDIX 4B Sail ?"+ami H)A= ;Sall Name Soil Nam Elxdzrp AP.PO-MAT 0X $ AQUENTS D AQUULTS D ARAPAHOE BlD ARCOLA C ARGENT D ASBURN* G ASIIE B ASHLAR B ASSAT1rAGUE A AT'KINS D ATLE,E C AUGUSTA, C ALMA B AUSTINV LLE B AXIS D AY'COCK ,I3 BACKBAY D BADTN B BAIL.E 1) BAII,EGAP BA.NLk B BAY$ORD D BEACHES D BECKHAM B BELLLWEN D BELTSVTLLE C I3ELVOIR C EERI{S C BER14UDI N B BERTM B BIBS D BILTMORE {k BIRDSBORO B $LADEN D BLAIRTCIN C BLAND c BLEAi:H LL, C BLLTEMONV B BOHICKET D BOJAC B BOLLINC C $C1i.TON B RONN1rAU A BUOKWOUI] B BOTETOUPT" C BOURNE C BOVO4ANSVlLLE WD BRA,DDOCK B BRADLEY C BRAND'yWINE C BRE K,I` OCK B BREMO C BPJiN SVU.LE C BROADWAY 13 BkOCKRDAD C BRUSHY B BFTCHANAN c 13TJC T3Ai_T. B BUCKS ti BUCKTON B SLIFFSTAT E BUGLEY CT BUNCOMBE A BLTRICETOWl , C' BURRO WSVILLE C C:ALVERTON C CALVIN C CAMOCCA A1D CANE' IUZ C C-AR.BO C CARDIFF B CAROLD \E c C.ARRVALE D CAR.TEOA`( C CATASKA D CsATHAA"IN C CATLITr C. -T7 CATOCTIN C ATI'(:D"-T A CAVERNS $ CECIL B CHACiRIN CHAPANOKE c COUNTY OF ROANOKE 9/22/15 STORMWATER HYDROLOGY 4B-8 STORNIWATER HYDROLOGY APPENDIX 4B Soil Mame liydvrp SdUtulm Hyd,61P Soil Nam Ilydgrp CRAIST-AiNT D CHAT GE D CHAVIES R CIEENTNEBY c CHESTER B CHEWACLA c CHICKAHOMT.ITV D CHILHOWIE c CHINCOTEAGUE D cHrpl-Fy C CEISWELL D CHRISTLAN c CID C CLAP I LAM c CLEARBROOK D CLIFTON c CLUBCAF D CLYNIER L) COASTAL BEACH D CODORUS c COLFAX c COLLEEN c COLVARD B COMBS B comus B CONFTOE A CONGAREE R COOSAW B COROLLA D COR'MON D COTACO C C-01JRSEY C COIVEE B COXVILLE D CRAIGSVILLE B CR-,kvT-N c CREED -MOOR c CROTON D CULLIEN c CULPEPER c DALF-VrT.T.F D DANDRJDGE D DAVIDSON B DAWN00 WD DECATUR B VARIANT DEKALB c DE NCO c DELOSS B/D DERROC B D=ARD c ROGUE c DOROVAN D DOTHAN B DRAGSTON c DRALL B DRYPOND D DUCKSTON A0 DUFFEELD B DULLES D DUMFRIES B DUNB.�R D DUNNrNG D IDUPLY-14 c DURHAM E DYKE B EBBING c EDGEHILL C EDNEDYTO-WN B EDNEYVILLE B EDOM c ELBERT D ELIOAK c EL10K C ELKTON CA) ELL BER A ELSrNBORO B E-NQORlA c ENDCAV c COUNTY OF ROANOKE 9/22/15 4B-9 STORMWATERRYDROLOGY STORNIWATER HYDROLOGY APPENDIX 4B Soil Name Hyd"I I Sn31 Nfune Ui S -DU Name MUM ENON c FNOTT C ERNES'T C EUBANKS 9 EULONIA O EUNOLA EVANSHA,M D EVARD B EVERGREEN B EXUM C. FACEVILLE B I~AMFAX B FALLSINGTON B/D F'AUGUIER O FAYWOOD C FEATHERSTONE D FISHERMAN D F LATWOODS C FLETCITER B FLUVANNA O FLT-J-VAQUENTS D FORESTD.kLE D FORK. C FRANKSTOWN B FREDERICK F FRENCH C FRIPP A OAILA B GAINESBOR.O C GALESTOWN A GEORGE ILL.E. B CILPIIN C GLADEHII.LL B GLENELG B GLENL ILI-F C GLENWOOD B GOLDSBORO B GOLDSTOIN C GOLDVEIN C C RE.SVIL,LE* B GREENLEE B GRIMSLEY 13 GRITN'EY O GROSECLOSE C GLOVER B GLTRMEEY C GU LIOX C GUNSTOCK C GUYAN C MNTNNETT B HAGERSTDV17N O VARI NTr HALEWOOD B HARTLETOiti B HATBORO D HAWKSBILL B HAYESV LLE B IiAYM RKET D HAYTER B INAYWOOD B HAZEL G HAZEL O EAZELTON B HELENA CHANNFRY HER DON B HIWASSEE B HOADLY C HODUCKEN D HOGEI 1Dw C ROLL -r -'OCD D HUNTI GTON B HYATTSViLL.E B HYDE B,'D H'i'DRAQU"ENTS B INGLEDOVE B =F -LL CID COUNTY OF ROANOKE 9/22/15 4B-10 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY APPENDIX 4B "tnil Namja lied -r Soil Name IRONGATE B rLTKA C I AGORA C JACKLAIND D JI DBIU7R a c JEFFERSON B JOHNS C JOHNSTON D JUWALU'SKA .B KkLNILA B KELLY D KEN PSVILLE B KENANSVILLE A KENAN-SVILL.E O KEYPORT C VARiLANT K,TNKO12A D KIN TON WD KLEJ B KLINESVILLE CID KONNA ROCK C LAIDIG LAKEHUR.ST A LAI ELAND A LANEXA D VARIANT LANSDAI.E B LAROQUE B LAINNES D LEAF A LF,A.KSVILLE D LECK KILL B L.EEDSVILLE* B LEETONIA C LEG RE B LEHEW G LENOIR D LEON BrT1 LEVY D LEW B LEWISBER,RY II LIBRARY D LIGNUM C LILY B LINDSIDE C LITTLEJOE B LIT LLOYD C LOBDELL 13 LODI B LOUISA► 13 LOUISBURG B LOVPE.LL LUCKETTS B LUCY A LUGNTUNT C LUhiBEE B/D LUN7 C LYTNCHBURG C MACOVE B NLkDlS0-N 13 MAGOTTL4 D NLANASSAS B MANOR B NL4NTACHIE c NLANTEO CAD MARBIE G M.ARGrO B lARLBO O E -K R B MARUMSCO c MA ADA. lv NLA-SS,ANETTA 13 MASSANUTTE1ti B KA.TAPEA.KE B MATNELFLAT B MATTAN D COUNTY OF ROANOKE 9/22/15 4B-11 STORMWATER HYDROLOGY STORNIWATER HYDROLOGY INIATTAFEX C MATTAPONI C MAYODAN B MCGARY C NiEkDOWS D MEADOW -MLLE B MEGGETT D MELI;A D MILLitc)€.;K A MINNIEVILLE C MOLENA A MOI*:ACAN C Nn ERSVILLE C v�f�ONTT�ALTO Ik C ry1�'IC�NONTGAx�LLA A1`IO 1ROSS C 1�` MOON -L. T4'YF c I+v ORV N B MOUNT LUCAS C MUCIKA-LEE D fvfUNDE-N B WATT D MYATT V -AIHAN T i NAHUNTA C N.AN EMOND B. NAW EY D NEARSCO c NT, VARC C NEWARK C, Ni-EIX FLAT D N EWHAN A NiCHOLOSON C -NBIMO D NOLICHUCKY R NOLTN B NORFOLK B OAKHrLL 3 OATL.ANDS B OCCOQUAI B OKEETIrE D OPEQUON C O ANGEBURG B ORENDA B OSIER A -T) OTFTELL C:.T) PAC'TOT-US A PAGEBROOO K. D PA ILNKEY B KEY A gP,4�i�Vji�L'7`� PARKER B PARTLOW D PEAKS C PEAWTCIK D COUNTY OF ROANOKE 9/22/15 4B-12 APPENDIX 4B 5uil Ham EWIftlicp NiAURERTOWN D MCQUEEN C MECKLEN-BURG C ELVIN O MLXE.D D ALUNT-Tim MONCxT. E c t(��Iy�- 7 ��ES�S7-�O7-I��*7 1N'l4JRRISONL V 1L.� . * �By B MT) EATHF.l * B MURRILL B Nn ERSVILLE B NASON B NESTORLk CID NEWBERN C jNEWMARC i C NIA C NOMIYRVILLE B QAK.LI T C OCHLOCKONIEE B ORANGE D ORISKANY B FACOLET B. P,kN LIDO D FANOR.ANIA B PASQUOTA X BIT) PENN 01) STORMWATER HYDROLOGY STORVIWATER HYDROLOGY APPENDIX 4B Sail Nark PHIL.O TIYAM B sQjl Nam PamomomT* gLzdgrp B 502ia= PINEYWOODS ROM D PINKSTON B PISGAH C POCATY D POCO iOKE BID POINDE P, B POLA. ANA A+'D POOLER VARIANT D POPE B POPLINIFlqm C FORT -RS B PORTSMOLrM B,D POIINCE'Y D PUNGO D PUROELLVRLE B PURDY D RAIL' [ B RAINS BID RA SEY D RAPT AN B RAPPILANNOCK D RARITAN C RAYNE B READIN03TON C REAVILLE. C RENM K A RIGLEY ,B LION B RIV ERVTEW B ROANOKE D ROHRERSVII.LE D ROSS B ROWLAND O RWFORD B RUSSTOWN A RUS7ON B SAF'ELL B SASSAFRAS B SASSAFRAS R SAITN[:OK B SAVANNAH C SCA-nERSVILLE* C SCHAFFENAKJKR A SEABROOK c SEDOEFIEL.D C SEKI _ B SENECA B SEQUOIA C SHELOCTA B SHVAL B SHERANDO B SHEVA C si-10=vmn D SiNDION D SIKHTERVILLE C SLABT VVN B SLA+GLE C SLICKENS B SNICKERSVILLE B SPEEDWTLL B SPES ARD A SPT EY B SPOSTSYLVANLA C SPRIGGS C SPRrNGWOO1D B STANTON D STARR STATE B STEINSBURG O STONEVILLE B STUART O STUMPTOWN B SUCKS B SUDLEY 13 SUEQUEHAN A D SLYFFOLK B SUSDLEY B SU'S[ UE L NNA D SWAMP D COUNTY OF ROANOKE 9/22/15 STORMWATER HYDROLOGY 4B-13 STORNIWATER HYDROLOGY APPENDIX 4B 1 FlyA= S611 Nikme Llv� Soil Nam Elydojp S EETAPPLE B SwIlvazy C SYCOLINE D sYLGO C SYLVATUS D TALLADEGA C TALLA 00SA C T'ARBORO A TATE B TATUM B TFITOTUM C THUNDER B THURMONT B TIDAL I4MARfiH D TMBERVIL.L.E B TIOGA B TOCCOA B TODD TAV D T'OMOT"LEY 131D TOMS C TORHL�iTA. C TOTIER C TOXA AY BiT] TRAPPIST C TREGO B TRENHOLM D TTUCKAHOE B TUMBLING B TURBEVILLE C TLUSQ=E B TYGART C UCHEE A CJDFF'LLTvT-NTS B UNISON B VANCE C VAl2INA C 'VIERTTR;{ErE B{ WADESI�+C�RO B }U}C�'+L�USE WA YY�'S.L7.M 7c D x7rt3.31�1 LL. A A XYALLEN B WARMINSTER c WATATJOA B WATF.REE B WAT ' D WAXPOOL D WEAVED C WEAVERTON* C WEBBTOWN C WEDOWEE B WEKKSVELLI~ B/D WEHADKEE D WEIKE.RT C/D VMSTMORELAND B WESTON D WESTPR LLA B VEVTHRTON B WFIEELIY+ G B ''YIII TE STONE D WIUTEFORD B WICKHAM B WILKES C WOLFGAE B WOt]DI' GTO-° B/D WORSHAM D WRIGHTSBpRO C '+J YRYICK B VVURNO C WYPJCK B Y DKIN C/D YE IA SEE C YEOP11\i B YORK C ZEPP B ZION C ZOAR C COUNTY OF ROANOKE 9/22/15 4B-14 STORMWATER HYDROLOGY STORMWATER HYDROLOGY APPENDIX 4C APPENDIX 4C INFORMATION FROM VDOT HYDRAULIC DESIGN ADVISORIES Rainfall Intensities (inches/hour) for the Roanoke Valley (Based on VDOT HDA 05-03) COUNTY OF ROANOKE X/1/15 4C-1 STORMWATER HYDROLOGY STORMWATER HYDROLOGY APPENDIX 4C Note: For use with the Rational Method only. Use NOAA precipitation chart for SCS Method. RAINFALL INTENSITY (IN/HR) FOR THE ROANOKE VALLEY Table based on VDOT Hydraulic Design Advisory HAD 05-03 If = B / (tc + D)E where: If = Rainfall intensity for a given recurrence interval, f, in inches per hour tc = Watershed time of concentration (assumed to equal the storm duration), in minutes B,D,E = As taken from HDA 05-03 table for [Roanoke] [Roanoke (city)] based on the designated storm frequency. COUNTY OF ROANOKE X11115 4C-2 STORMWATER HYDROLOGY Storm Duration (min) 5 10 15 20 25 30 35 40 45 60 75 90 105 120 2 4.39 3.51 2.94 2.54 2.24 2.01 1.82 1.67 1.54 1.26 1.07 0.94 0.83 0.75 Cj 5 5.33 4.29 3.62 3.14 2.79 2.52 2.30 2.12 1.96 1.63 1.40 1.23 1.10 1.00 10 6.04 4.91 4.18 3.66 3.26 2.96 2.71 2.51 2.34 1.96 1.69 1.50 1.35 1.23 Cj 25 6.78 5.49 4.68 4.11 3.69 3.36 3.10 2.88 2.70 2.28 2.00 1.79 1.63 1.50 a� 0 50 7.37 5.96 5.09 4.49 4.04 3.70 3.42 3.19 3.00 2.56 2.26 2.04 1.87 1.73 100 8.08 6.49 5.56 4.92 4.46 4.10 3.81 3.57 3.37 2.92 2.61 2.37 2.19 2.04 Table based on VDOT Hydraulic Design Advisory HAD 05-03 If = B / (tc + D)E where: If = Rainfall intensity for a given recurrence interval, f, in inches per hour tc = Watershed time of concentration (assumed to equal the storm duration), in minutes B,D,E = As taken from HDA 05-03 table for [Roanoke] [Roanoke (city)] based on the designated storm frequency. COUNTY OF ROANOKE X11115 4C-2 STORMWATER HYDROLOGY OPEN CHANNELS Chapter 5 — Open Channels CHAPTER 5 Open channels are man-made ditches and channels and natural channels, that are used to convey stormwater flow. This section defines criteria and restrictions to be used in designing open channels. Where open channels are a part of a BMP, they shall comply with the state requirements for the purposes of water quality improvement; however, they shall also comply with this Design Manual's requirements for water conveyance. 5.1 References The primary design references are: • VDOT Drainage Manual • VDOT Specifications • VA E&SC Handbook • Hydraulic Engineering Circular Number 15 (HEC -15), Design of Roadside Channels with Flexible Linings, Current Edition, as amended • VA SWM Handbook 5.2 Design Methodology and Criteria 5.2.1 Major and Minor Manmade Open Channels A major channel is designed to convey less frequent storm events which would have significant adverse consequences if it failed. Major channels protect buildings and other important features from flooding and catastrophic failures. A minor channel is designed to convey more frequent storm events and they include most onsite open channels and roadside ditches. These structures have less adverse consequences due to overtopping. 5.2.2 Design Flow Design flow for manmade open channels within a development is contained in Chapter 4.2.2. Channels shall be designed to convey the 10 -year flow. Additionally, all storm drainage designs for open channels, culverts, and storm drains shall be checked for the 100 -year flow condition where there is the possibility of flooding residences, commercial or industrial buildings, overtopping primary roads, experiencing significant economic loss, or catastrophic failure. Where justified by the consequences of failure, the minimum design frequency COUNTY OF ROANOKE 9/22/15 5-1 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 shall be increased. Design flows for downstream channels and all natural channels shall comply with the VA SWM Regulations. 5.2.3 Hydrology See Chapter 4 for methodology used to determine peak flows for a given design frequency. 5.2.4 Channel Hydraulics Open channel design will be based on Manning's Equation for open channel flow, unless good engineering practice dictates using HEC -RAS or other method. See the VA SWM Handbook and VDOT Drainage Manual, as appropriate. Q = A x 1.49/nxR2"x5112 Where: Q = Flow in the open channel (cfs) A = Cross-section area of the channel (ft) R = A/wetted perimeter (ft) S = Channel slope (ft/ft) n = Channel roughness coefficient Nomographs have been included in Appendix 5A for use in solving Manning's equation setting channel characteristics. 5.2.5 Channel Velocity The lining of minor channels with drainage areas of five acres and less shall be designed to withstand the erosive effects of a 2 -year storm. The lining of minor channels with drainage areas over five acres and major channels shall be designed to withstand the erosive effects of a 10 -year storm. The final design shall be consistent with velocity limitations for the selected channel lining, as presented in Table 5-1. Major channels associated with dam embankment spillways or other structures where catastrophic failure could result from a lining failure may be required to be designed to withstand a more severe storm event. Where open channels receive flow from storm drains, culverts, or other open channels, or in other areas where channel velocity may cause scouring or erosion, outlet protection or energy dissipation may be necessary to reduce the potential for severe erosion. For the design of energy dissipation devices, see Chapter 10. COUNTY OF ROANOKE 9/22/15 5-2 OPEN CHANNELS OPEN CHANNELS TABLE 5-1 Maximum Velocity Based on Channel Lining CHAPTER 5 Channel Lining Maximum Velocity (Design Storm Erosion Resistant Easily Erodible Soils, Soils' Vegetative Lined Channels Tall Fescue Grass Mixtures 6 fps 4 fps Kentucky Bluegrass 6 fps 4 fps Annual and Perennial Rye 4 fps 3 fps Sod 4 fps 3 fps Geos nthetic Lined Channels VDOT EC -2 4 fps VDOT EC -3, Type A I fps VDOT EC -3, Type B 10 fps Other Per Mfr Recommendations Riprap (see VDOT Drainage Manual Appendix 7-D for n values) Dependent on stone size and thickness, see HEC -15 for design of riprap channels Concrete None 'Erosion resistant soils include those with a high clay content and high plasticity, silty clay, sandy clay, and clay. 2 Easily erodible soils include those with a high content of fine sand or silty, lower plasticity or non -plastic, sand, silt, sandy loam, and silty loam with an erodibility factor (K) greater than 0.35. 3Soils shall be presumed to be easily erodible; unless a geotechnical investigation is performed that samples and tests the soils. 4All channels constructed in fills shall be considered to be in easily erodible soils. 5.2.6 Channel Slope Generally the channel slope shall be established by the site topography. Open channels must be graded to drain with no standing water following a rain event. The minimum allowable grade shall generally be 2 percent for vegetated -lined and riprap-lined open channels and 1 percent for a concrete open channel. The maximum allowable grade for a stormwater channel shall be dependent on the channel lining materials and its ability to withstand erosion during the design storm. COUNTY OF ROANOKE 9/22/15 5-3 OPEN CHANNELS OPEN CHANNELS 5.2.7 Cross Sectional Area CHAPTER 5 Open channel cross-section area shall be designed based on site restrictions and channel capacity requirements. A table and detail shall be provided on the design plans that includes the channel number, bottom width, top width, slope, side slopes, total depth including freeboard, and liner. Each swale should be included in the chart and not just a worst case scenario. Additionally, Qio, Qio water depth, freeboard provided, and V2 shall be clearly indicated in the calculations. Acceptable cross-sectional area options include: • Vee • Parabolic • Trapezoidal • Rectangular A. Vee For design aids, see the VDOT Drainage Manual and the VA E&SC Handbook. Additionally computer software such as North American Green, Flowmaster, etc can be used for design aids. The maximum side slope of a vee -shape open channel is 3 horizontal to 1 vertical for vegetated channels (including reinforced vegetated) and is 2 horizontal to 1 vertical for all other linings engineered to be stable at this slope. B. Parabolic For design aids, see the VDOT Drainage Manual and the VA E&SC Handbook. Additionally computer software such as North American Green, Flowmaster, etc can be used for design aids. C. Trapezoidal For design aids, see the VDOT Drainage Manual and the VA E&SC Handbook. Additionally computer software such as North American Green, Flowmaster, etc can be used for design aids. COUNTY OF ROANOKE 9/22/15 5-4 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 The maximum side slope of a trapezoidal -shape open channel is 3 horizontal to 1 vertical for vegetated channels (Including reinforced vegetated) and is 2 horizontal to 1 vertical for all other linings engineered to be stable at this slope. D. Rectangular Rectangular channels shall only be allowed where site restrictions prevent the installation of a vee, parabolic, or trapezoidal channel. The requirements for rectangular channels apply to any open channel with side slopes greater than 2 horizontal to 1 vertical. Rectangular channels must either be concrete or gabions. An approved safety barrier must be placed on both sides for the length of the rectangular channel, where the channel is more than 3 -feet deep. Care must be taken to ensure that energy dissipation is placed at the outfall of the rectangular channel to prevent erosion at the discharge point. 5.2.8 Channel Lining An open channel lining shall be designed based on the cross-section, slope, and channel velocity requirements. The design may be based on a consideration of either permissive velocity or tractive force as described in the VDOT Drainage Manual. The preferred method for analyzing channel linings is to compare the maximum permissible velocity for the channel lining, listed in Table 5.1 in this chapter of the Design Manual, to the design velocity computed using Manning's equation to verify that the selected lining is adequate. As an alternative, the selected lining may be analyzed using the Tractive Force Method published in the VDOT Drainage Manual. This method analyzes sediment critical shear loading on the open channel bottom and side slope. The permissible tractive force for various soils is located in the Appendix of the VDOT Drainage Manual. Open channels may have different lining materials in different channel reaches based on velocity and potential erosion conditions. Care must be exercised to avoid erosion at open channel transition points. The open channel lining will have an impact on the design capacity in the form of the roughness coefficient. A table of generally accepted roughness coefficient (n) for various channels and linings is included in Appendix 5A. COUNTY OF ROANOKE 9/22/15 5-5 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 Allowable open channel linings include the following: A. Natural To the maximum extent possible, natural channels shall be preserved. Design discharges from permitted land disturbing activities shall comply with the VA SWM Regulations. B. Vegetative -Lined Vegetated or grass -lined channels include man made channels lined with established vegetation. These channels usually include a geosynthetic mat for channel stabilization. The type of grass allowable for vegetative -lined open channels is dependant on the slope of the channel, and the peak calculated velocity. Table 5-1 details the maximum permissible velocities for various channel linings. A permanent channel stabilization geosynthetic mat should be considered for all vegetated channels. There are a wide variety of geosynthetic stabilization mat options from various manufacturers. The geosynthetic mat selected should be adequate for the slope and design flow velocities calculated for the channel. Where appropriate, VDOT Road and Bridge Standard EC -2 or EC -3 may be used. Where a permanent geosynthetic mat is used to provide channel stabilization, information on the proposed mat, in the form of manufacturer's catalog information, shall be submitted as a part of the stormwater management plan. The catalog information shall include the manufacturer's recommendations for maximum allowable velocity. Design drawings must state that the geosynthetic stabilization mat shall be installed in strict accordance with the manufacturer's recommendations. Where a permanent channel stabilization geosynthetic is not used, a temporary geosynthetic lining designed to provide a measure of bank stability until such time a reasonably stable and mature stand of vegetation is established shall be provided. C. Riprap-Lined The use of vegetated and geosynthetic-lined open channels for gentle - sloped open channels and concrete for steep -sloped open channels is COUNTY OF ROANOKE 9/22/15 5-6 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 recommended. Riprap-lined channels will not be acceptable where vegetated or geosynthetic-lined open channels are feasible. However, where design flow velocities exceed the erosive capability of a natural or vegetative -lined channel, rip rap may be used as a channel liner in areas where erosion is a concern. For an extended length of high velocity channel, consideration should be given to using a concrete channel rather than rip rap. Riprap lining shall be properly embedded in accordance with VDOT standards to maintain intended ditch cross section. Where riprap is required due to velocity conditions, it shall meet VDOT Standards and VDOT Specifications. VDOT recommended 50 percent stone size (D5o) and weight (W5o) and recommended thickness (T) for various riprap classifications is included in Appendix 5A. D. Concrete -Lined Reinforced concrete shall be considered where design velocities dictate or where there is a need to provide the maximum level of erosion protection. 5.2.9 Freeboard Requirements Manmade channels within a development shall have a minimum of 6" of freeboard above the calculated water level during the design peak flow, unless flow is supercritical. Where flow is supercritical, a minimum of 12" of freeboard is required. Flow is supercritical when: V / (32.2 x H) 0-5 > Where: V = velocity (fps) H = depth of flow (feet) At bends and curves, the freeboard shall be measured from the calculated water level, including the increased depth due to the superelevation of the water surface. 5.2.10 Calculation of Depth of Flow at Bends and Curves Increases in the depth of flow occur at bends and curves due to the superelevation of the water surface. Superelevation of the water surface at bends and curves is calculated by: AZ = V2 / (32.2 x r,�) x (ro — ri) where COUNTY OF ROANOKE 9/22/15 5-7 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 AZ = difference in water surface elevation between the concave and convex banks (ft) V = average velocity (ft/s) r,� = radius of the center of the stream at the bend (ft) ro = radius of the outside bank of the stream at the bend (ft) ri = radius of the inside bank of the stream at the bend (ft) The increase in the normal stream flow depth at the outer bank of an open channel bend is one half of AZ. 5.2.11 Channel Location and Width Restrictions on Residential Lots The tops of open channel banks shall be at least 20 -feet from a residence. Where manmade open channels collect stormwater from more than one lot and they are located on a residential zoned lot their use shall be restricted as follows. Where all requirements cannot be met, a closed pipe storm drain system is required. • Residential lot size 1 acre or greater o No additional restrictions. • Residential lot size 0.5 acre or greater, but less than 1 acre o Open channel top width shall be a maximum of 15 feet o Maximum drainage area passing through the open channel shall be 5 acres. • Residential lot size less than 0.5 acre o Open channel top width shall be a maximum of 15 feet o Maximum drainage area passing through the open channel shall be 3 acres. The above restrictions do not apply if any one of the following conditions is present: • The open channel is a natural channel that has adequate capacity. The retention of natural channels is encouraged. • The open channel is a perennial or intermittent stream that has adequate capacity and will remain undisturbed. • It may be demonstrated that open channels are required as a part of an integrated design to obtain the necessary water quality treatment. COUNTY OF ROANOKE 9/22/15 5-8 OPEN CHANNELS OPEN CHANNELS CHAPTER 5 5.3 Environmental Considerations and Fishery Protection Construction or modifications to open channels shall comply with all applicable laws and regulations. The applicant is responsible for procuring all necessary permits, such as US Army Corps of Engineers and VA DEQ Wetland Permits, VA DEQ VPDES Permits, etc., prior to obtaining a Land Disturbance Permit. A copy of these permits shall be submitted to Roanoke County prior to scheduling the precon meeting or the Engineer shall submit a 3rd party report to the County that supports that the permits are not required. 5.4 Maintenance Requirements The permittee is responsible for maintenance of open channels until construction is complete, including final clean up and site stabilization, to the satisfaction of the County of Roanoke. After the completion of construction, the property owner is responsible for maintenance of open channels. Maintenance includes periodically pruning or mowing vegetation and removing debris. 5.5 Floodplain Studies A floodplain study shall be performed for all drainage areas greater than 100 acres that do not have detailed FEMA Flood Insurance Study flood profiles or elevations. See Chapter 12 for additional information on floodplain requirements. COUNTY OF ROANOKE 9/22/15 5-9 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A AIDS FOR OPEN CHANNEL DESIGN FROM CHAPTER 7, VDOT DRAINAGE MANUAL Appendix 7B-1, LD -268, Roadside and Median Ditch Design Form Appendix 7B-3, Channel Stability Work Sheet APPENDIX 5A Appendix 7B-4, Riprap Design Work Sheet for Standard VDOT Riprap Sizes Only Appendix 7B-5, Riprap Design Work Sheet for other than VDOT Standard Riprap Sizes Appendix 7C-1, Nomograph for Solution of Manning's Equation Appendix 7C-2, Trapezoidal Channel Capacity Chart Appendix 7C-3, Nomograph for Solution of Normal Depth Appendix 7D-1, Values of Roughness Coefficient n, 2 sheets Appendix 7D-3, Standard VDOT Riprap Classifications, Weights, and Blanket Thickness Appendix 7D-5, Selection of Stability Factors Appendix 7D-6, Permissible Velocities for Erodible Linings Appendix 7E-1, Angle of Repose of Riprap in Terms of Mean Size and Shape of Stone Appendix 7E-2, Permissible Shear Stress for Non -Cohesive Soils Appendix 7E-3, Permissible Shear Stress for Cohesive Soils Appendix 7E-4, Bank Angle Correction Factor (Ki) Nomograph Appendix 7E-5, Correction Factor for Riprap Size Appendix 7E-6, Riprap Size Relationship Appendix 7E-7, Channel Side Shear Stress to Bottom Shear Stress Ratio COUNTY OF ROANOKE 9/22/15 5A-1 OPEN CHANNELS OPEN CHANNELS Appendix 7E-8, Tractive Force Ratio (K2) Appendix 7E-9, Determination of Mean Spherical Diameter COUNTY OF ROANOKE 9/22/15 5A-2 APPENDIX 5A OPEN CHANNELS OPEN CHANNELS Q zi;mAvwi 0 C m ad � �7 W a cz O q CV e p i J P-. po APPENDIX 5A d a .5 a a IIS ICI ii morry 2's F9 i' U `p U- H C.i s* 7S Q Q 't.! v+ G U a 0 AW79 d rn � COUNTY OF ROANOKE 9/22/15 5A-3 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A CHANNEL STABILITY WORKSHEET CHANNEL DATA Q= WS) P= (ft_) Native Material = (flit) R = (ft-) C -5Q = d„ 1- (ft,) 1J„ - ffps) 075 A=— W) Side Slope = :1 n = STABILITY ()F NATIVE MATERIAL Tb= 62.4 • R o S, = 2-4 . 0 - .rp Ped = (Appendix 7E-2 or ) For D50;-- _ ° (Appendix 7E-1) Far 075 = = (Appendix 7E-9) Side Slope v A 0= Q 1 = [1 - (siW a 1 Sir .3)] Ci.5 `- Ts Side Slope () -cr, Fed * I' = • - tr, Eyed ( ) (<) (=) (>) co � ) Dative Material on Bed iss (stable) (unstalble)� T7. S S ( ) (<) (=) N -to ( ) _-_ Native Material on Side Slope is (stable) (unstable) COUNTY OF ROANOKE 9/22/15 5A-4 OPEN CHANNELS OPEN CHANNELS CHANNEL DATA Q = �() dn = (ift. RIPRAP DESIGN WORKSHEET (VDOT STANDARD SIZES) P = (ft.) R = (ft.) Ili = (fps) A _ ft. 2) Side Scope = ___ A 4 = 42° Side Slope = :1 Oz ° 1+1 = [1 - (:sin2 0 f int+ )j 0$ K, = [1 - (sin2 ° f sing 42)] 4 5 For Specific Gravity = 2.65 and Stability Factor = 1.2 D:5, — 0_DD1 w ,,' I (d„vy” S-, K 1 1 5) n APPENDIX 5A D6,, Computed [Vote: All VD0T standard riprap (Class Al through Type II) is assumed to have a 0 of appfoxirrrately 4 ' and a Specific revity of 2.65. Therefore, the Computed D . should be adjusted by the Stability Correction Factor ( .SF) (I any) to derive a Final D;,,_ The ' DOT Auridard a;la uF riga op with If iv rivxt hiyht;-,r D� %iIiQuld UQ, WVU' it -,d. Correction Factor For Stability Factor (SF) other than 1.2 (Default = 1.0) C.sr• - (SF / 1.2)':' _ ( 11.2)' s Fi.n;al D5G= CFT * Computed D-0 = _ RIPRAP RECOMMENDATION- VOOT (Class) (Type) - Thickness (`i`) _ .- _-" (2 a Dc,, MSD minimum) COUNTY OF ROANOKE 9/22/15 OPEN CHANNELS 5A-5 OPEN CHANNELS HANN EL DATA Q _ (ofs) S. = (fdit) RIPRAP DESIGN WORKSHEET (NON-VDOT STANDARD SIZES) P (ft.) d„ _ —(ft.) BJP, _ (fps) A = (ftp Side Slope ASSUMED RIPRAP SIZE - D.5o = VERIFY ASSUMED RI PRAP SIZE t = ° (Appendix 7E-1) Side Slope = 1 0 K, = [1 - (sin' o / sin' $)], 0.5 K,;= [1 - (Sin2 ° f sing 4)� 0.5 ; For Specific Gravity = 2.65 and Stability Factor = 1.2 D,,,1 = 0-001 Iw V�3 1 (d d 5 # K, 1.) DsD=0.001+ _ 3/( 050 i)= n= APPENDIX 5A DiD Computed ( ) (<) (_) (>) 05r, Assumed { Assumed Dso is (correct) (incorrect) [dote: The above process of assuming a D50 size, determining the natural angle of repose (0) and computing a Dm size should be repeated until the Assumed Dvosize equals the Computed 05o size. Once the DiQ size determination has been made, it should be adjusted forthe Specific Gravity Correction Factor Cs, (if any) and the Stability Correction Factor ( �,) (if any) to derive a Final DS„. Correction Factor For Riprap Specific Gravity (S.) other than 2,65 (Default 7.0) .9=2.121(Sr -1)15 = 2.121( - V.5 = Correction Factor For Stability Factor (SF) other than 1.2 (Defauk = 1.0) CsF _ (SF / (_/ / 1.2)”" = Final Correction Factor = C = C.g • CsF = _ Final Dom= C . Computed D _ @ _ RIPRAP RECOMMENDATION: Thickness (T) = " (2 • D50 IVISD minimurn) COUNTY OF ROANOKE 9/22/15 5A-6 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A NOMOGRAPH FOR SOLUTION OF MANNINGS EQUATION P to pGaz dol�y COUNTY OF ROANOKE 9/22/15 ev d 1 5A-7 t o e OPEN CHANNELS A -04b y 6e0* t*. P6 Dolt t4■ a 1A Co's lk" * A .03 41 pr Ftp#, ■ Lt AF � # _A Wi .5 COUNTY OF ROANOKE 9/22/15 ev d 1 5A-7 t o e OPEN CHANNELS -,Ew== ••5.=.■ u.lELii7E1.lRBmm11111111111Elll Hill l 11l11ilhmr roawki■h1■■iIWll1E%rlrlll111111 1111111151l.inaama7 mmilllrllrlllfill 111111 Iffilllllltilf"ANK Wrrl,lllllllll711llj liffilklummulmsm WillhIljlllllllllllJ III�IIII�II�L���l �CII?I�IIJI1�11lllii --------------- ___-_- -____-------7i YIIf1iMull I1111111III 11 IIIfJilllllq Illlllilfl�ll '•q Y,l■ uiryp�, Ifli�■ u iuMnuuu. 11 i,lnnuuu� 11111C11111111Ii � wuul�liuu i OPEN CHANNELS APPENDIX SA NOMOGRAPH FOR SOLUTION OF NORMAL DEPTH « wtlF� @o*d Wlzmlmllyf_ Zgo oqab& c, B 14 H_w.__p— 7-I Ij . d � �• © �» S X002 0 -1 D, aS «d --0,33 0.02 COUNTYOF#O&&OKE 9/22/15 � � .00 Eve � ■.Q: � o=io 3 s r•U.03 ■•4 FT z,■ 5A-9 Firep ; Z4&UT ION; d k=O■ d/■- 4 d;tmW4 am FI O#£& CHANNELS On qa �a $f m 06 m �G ..o =p 8.0 e; 2 : 0.50 7-u 7u DA X002 0 -1 D, aS «d --0,33 0.02 COUNTYOF#O&&OKE 9/22/15 � � .00 Eve � ■.Q: � o=io 3 s r•U.03 ■•4 FT z,■ 5A-9 Firep ; Z4&UT ION; d k=O■ d/■- 4 d;tmW4 am FI O#£& CHANNELS OPEN CHANNELS APPENDIX 5A VALUES OF ROUGHNESS COEFFICIENT `n' CHANNELS Type of Channel and Description Minimum Normal Maximum LINED CHANNELS (Selected linings) a. Concrete 1. Trowel finish 0.011 0.013 0.015 2. Float finish 0.013 0.015 0.016 3. Gunite, good section 0.016 0.019 0.023 b. Asphalt 1. Smooth 0.013 0.013 --- 2. Rough 0.016 0.016 --- EXCAVATED OR DREDGED a. Earth, straight and uniform 1. Clean, recently completed 0.016 0.018 0.020 2. Clean, after weathering 0.018 0.022 0.025 3. Gravel, uniform section, clean 0.022 0.025 0.030 4. With short grass, few weeds 0.022 0.027 0.033 b. Earth, winding and sluggish 1. No vegetation 0.023 0.025 0.030 2. Grass, some weeds 0.025 0.030 0.035 3. Dense weeds or aquatic plants in deep channels 0.030 0.035 0.040 4. Earth bottom and rubble sides 0.025 0.030 0.035 5. Stony bottom and weedy sides 0.025 0.035 0.045 6. Cobble bottom and clean sides 0.030 0.040 0.050 c. Dragline excavated or dredged 1. No vegetation 0.025 0.028 0.033 2. Light brush on banks 0.035 0.050 0.060 d. Rock cuts 1. Smooth and uniform 0.025 0.035 0.040 2. Jagged and irregular 0.035 0.040 0.050 e. Channels not maintained, weeds and brush uncut 1. Dense weeds, high as flow depth 0.050 0.080 0.120 2. Clean bottom, brush on sides 0.040 0.050 0.080 3. Same, highest stage of flow 0.045 0.070 0.110 4. Dense brush, high stage 1 0.080 1 0.100 0.140 COUNTY OF ROANOKE 9/22/15 5A-10 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A VALUES OF ROUGHNESS COEFFICIENT `n' NATURAL STREAMS Type of Channel and Description Minimum Normal Maximum NATURAL STREAMS 1. Minor streams (top width at flood stage <100 ft) a. Streams on Plain 1. Clean, straight, full stage, no rifts or deep pools 0.025 0.030 0.033 2. Same as above, more stones and weeds 0.030 0.035 0.040 3. Clean, winding, some pools/shoals 0.033 0.040 0.045 4. Same as above, but some weeds and stones 0.035 0.045 0.050 5. Same as above, lower stages, more ineffective 0.040 0.048 0.055 slopes and sections 6. Same as 4, but more stones 0.045 0.050 0.060 7. Sluggish reaches, weedy, deep pools 0.050 0.070 0.080 8. Very reedy reaches, deep pools or floodways 0.075 0.100 0.150 with heavy stand of timber and underbrush b. Mountain Streams (no vegetation in charnel, banks usually steep, trees and brush along banks submerged at high stages) 1. Bottom: gravels, cobbles, few boulders 0.030 0.040 0.050 2. Bottom: cobbles with large boulders 0.040 0.050 0.070 2. Floodplains a. Pasture, no brush 1. Short grass 0.025 0.030 0.035 2. High grass 0.030 0.035 0.050 b. Cultivated area 1. No crop 0.020 0.030 0.040 2. Mature row crops 0.025 0.035 0.045 3. Mature field crops 0.030 0.040 0.050 c. Brush 1. Scattered brush, heavy weeds 0.035 0.050 0.070 2. Light brush and trees, in winter 0.035 0.050 0.060 3. Light brush and trees, in summer 0.040 0.060 0.080 4. Medium to dense brush, in winter 0.045 0.070 0.110 5. Medium to dense brush, in summer 0.070 0.100 0.160 d. Trees 1. Dense willows, summer, straight 0.110 0.150 0.200 2. Cleared land with tree stumps, no sprouts 0.030 0.040 0.050 3. Same as above, but with heavy sprout growth 0.050 0.060 0.080 4. Heavy stand of timber, a few down trees, little 0.080 0.100 0.120 undergrowth, flood stage below branches 5. Same as above, but with flood stage reaching 0.100 0.120 0.160 branches 3. Major Streams (top width at flood stage >100 ft) a. Regular section with no boulders or brush 0.025 --- 0.060 b. Irregular and rough section 0.035 --- 0.100 (The n value is less than that for minor streams of the same description, because banks offer less effective resistance.) COUNTY OF ROANOKE 9/22/15 5A-11 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A STANDARD VDOT RIPRAP CLASSIFICATIONS, WEIGHTS, AND BLANKET THICKNESS Classification DSo ft W5oObs) Tin Class Al 0.8 50 20 Class I 1.1 100 26 Class II 1.6 300 38 Class III 2.2 1000 53 Type I 2.8 2000 60 Type II 1 4.5 1 8000 1 97 SELECTION OF STABILITY FACTORS Condition Stability Factor Range Uniform flow; straight or mildly curving reach (curve radius/channel 1.0 - 1.2 width >30); impact from wave action and floating debris is minimal; little or no uncertainty in design parameters. Gradually varying flow; moderate bend curvature (30 > curve 1.3- 1.6 radius/channel width > 10); impact from waves or floating debris is moderate. Approaching rapidly varying flow; sharp bend curvature (30 > curve 1.6-2.0 radius/channel > 10); significant impact from floating debris and/or ice, significant wind and/or bore generated waves (1-2 feet); high flow turbulence; mixing flow at bridge abutments; significant amount of uncertainty in design parameters. Channel bends when ratio of curve radius to channel width (R/W) > 30. 1.2 Channel bends when 30 > R/W > 10. 1.3 - 1.6 Channel bends when R/W < 10. 1.7 COUNTY OF ROANOKE 9/22/15 5A-12 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A PERMISSIBLE VELOCITIES FOR ERODIBLE LININGS Soil type or lining (earth; no vegetation Maximum permissible velocities (ft/sec)for Water Clear carrying water fine silts Water carrying sand and gravel Fine sand non colloidal 1.5 2.5 1.5 Sandy loam (non colloidal) 1.7 2.5 2.0 Silt loam non colloidal 2.0 3.0 2.0 Ordinary firm loam 2.5 3.5 2.2 Volcanic ash 2.5 3.5 2.7 Fine gravel 2.5 5.0 3.7 Stiff clay (very colloidal 3.7 5.0 3.0 Graded, loam to cobbles non colloidal 3.7 5.0 5.0 Graded, silt to cobbles colloidal 4.0 5.5 5.0 Alluvial silts non colloidal 2.0 3.5 2.0 Alluvial silts colloidal 3.7 5.0 3.0 Coarse gravel non colloidal 4.0 6.0 6.5 Cobbles and shingles 5.0 5.5 6.5 Shales and hard pans 6.0 6.0 5.0 COUNTY OF ROANOKE 9/22/15 5A-13 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A ANGLE OF REPOSE OF RIPRAP IN TERMS OF MEAN SIZE AND SHAPE OF STONE ui w W CC u► J MEAN STONE SIDE, nSo, TX, 5 q 8 74 v 34 40 b;3 0:9 94g 2:ju 300 4qu 000 COUNTY OF ROANOKE 9/22/15 MEXN STONE SIZE, 050,MfeT 5A-14 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A PERMISSIBLE SHEAR STRESS FOR NON -COHESIVE SOILS 4 3 2 t.0 p Ibm 0-011- 0.9 COUNTY OF ROANOKE 9/22/15 D I in.) 5 10 so 100 PARTICLE 01WETER, 0 (mm) 5A-15 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A PERMISSIBLE SHEAR STRESS FOR COHESIVE SOILS Q. ,C;p 0.1 abili-2 4.415 0.01 COUNTY OF ROANOKE 9/22/15 Chart 2 �mmmmmlll m r� MEN 15.0 101.0 150-0 5A-16 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A BANK ANGLE CORRECTION FACTOR (Ki) NOMOGRAPH r O'S a T Bark angle with horizontal o Material angle of repase (See chart 4) (4) 00 35 30— K 1 K1 .30 2:1 . 70 51 20 40.1 3.5-1 0_ -F .92 .R1 —10 Example COUNTY OF ROANOKE 9/22/15 Given: Find:Solution: a . Ia. Ki 0 T 42° Very Anioutar K1= 0.685 5A-17 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A CORRECTION FACTOR FOR RIPRAP SIZE C = 1.61 F"I ( s -1) 1.5 C = D 51 CORRECTION FACTOR SF STABILITY FACTOR S- = SPECIFIG G RAVITY OF ROCK as c F 510- 24 .0 4.0— 1.9 3.0 2. 1.7 2.5 1,$ 2J- - 2,4- 2,41.4 1.4 2. �.3 2.7- .7.6 2.6- 2,11 2,111 Q Example: Giron: Solution: S5 = 2.65 SF 1.2 COUNTY OF ROANOKE 9/22/15 5A-18 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A COUNTY OF ROANOKE 9/22/15 Example Ghmn V,«+9.7 Fr W, S u�vrt: iii a -DAA d�.as11 J9 h. Ki -X-73 5A-19 OPEN CHANNELS RIPRAP SIZE RELATIONSHIP 0 _Moffl&n RpW Sizac � vt AvoruQv vrY M main a Rte} d , _ AveroQv depth In maki dwml M a 50 F�wk angle on tem 02 tl Ve � Q 25 Q. -. / r K 15,a r � as ,s 1 A. �r s.a s 7.0 COUNTY OF ROANOKE 9/22/15 Example Ghmn V,«+9.7 Fr W, S u�vrt: iii a -DAA d�.as11 J9 h. Ki -X-73 5A-19 OPEN CHANNELS OPEN CHANNELS CHANNEL SIDE SHEAR STRESS TO BOTTOM SHEAR STRESS RATIO 1.1 1.0 o.-9 a 0.6 0.9 0.5 Chart 13 0 2 COUNTY OF ROANOKE 9/22/15 APPENDIX 5A f DEPE 4 3 w2; 1.5 4 6 a 10 5A-20 Bid OPEN CHANNELS OPEN CHANNELS 4s 40 O d.'` lzW 1.{ 4= YiJY■ 25 6U 0 31 20 U- 0 15 1 [7 {J TRACTIVE FORCE RATIO (K2) APPENDIX 5A Chart 14 won ENE on ME 0 No mom MEN ;NOME MEN COUNTY OF ROANOKE 9/22/15 .02 014 10.6 5A-21 K2 OPEN CHANNELS OPEN CHANNELS APPENDIX 5A DETERMINATION OF MEAN SPHERICAL DIAMETER A IDD Q ? Q 1 COUNTY OF ROANOKE 9/22/15 -:e,, '?r 5A-22 2.56 2.24 OPEN CHANNELS ,a 5A-22 2.56 2.24 OPEN CHANNELS CULVERTS Chapter 6 - Culverts CHAPTER 6 A culvert is a single run of storm drain pipe that conveys water or stormwater under a road, railway, embankment, sidewalk, or other obstruction. A culvert typically connects two open channels, but they may connect an open channel to a storm drain. Proper culvert design must consider many factors including: • Design Flow • Inlet conditions (flow approach conditions, allowable headwater, culvert inlet configuration) • Culvert conditions (material roughness, pipe slope, and length) • Tailwater depth • Buoyancy potential • Environmental considerations and effects on aquatic life • Design loads and service life of the pipe material Refer to the VDOT Drainage Manual, for a more through discussion of these items. For the design of stormwater inlets and storm drains, see Chapter 7. 6.1 References Except where more stringent requirements are presented in this Design Manual, culverts shall comply with VDOT requirements. The primary design reference is the VDOT Drainage Manual. Other appropriate references include: • VDOT Standards • VDOT Specifications • VA E&SC Handbook • VDOT Instructional and Informational Memorandum IIM-1D-121.15, Allowable Pipe Criteria for Culverts and Storm Sewers • FHWA Hydraulic Design of Highway Culverts HDS No. 5, Pub. No. FHWA- NHI-01-020, Current Edition, as amended • FHWA Debris Control Structures Evaluation and Countermeasures HEC No. 9, Pub. No. FHWA-IF-04-016, Current Edition, as amended COUNTY OF ROANOKE 9/22/15 6-1 CULVERTS CULVERTS 6.2 Design Methodology and Criteria 6.2.1 Computation Methods CHAPTER 6 Manual computations use design equations and nomographs. Results are documented on VDOT's Design Form LD -269. Form LD -269 is included in Appendix 6A. There are a number of computer programs available to design culverts. Any of these computer programs will be acceptable if their methodologies are based on the same equations and nomographs accepted by VDOT, and if they provide the same documentation of inputs, assumptions, and output as are contained on VDOT's Design Form LD -269. 6.2.2 Hydrology A. Design Flow Methodology See Chapter 4 for methodology used to determine design flows. Generally culverts shall be designed based on the peak flow (steady state), ignoring the effects of temporary upstream storage. B. Obstruction Allowance An obstruction allowance shall be applied in critical areas where excessive backwater may result in property damage or be a potential safety hazard. After using the appropriate design methodology to calculate the peak stormwater flow for a given frequency, an obstruction allowance will be added to the peak flow to establish the design flow rate through the culvert. The minimum obstruction allowance factor is intended to account for normal culvert obstructions, which may lower the actual capacity of the culvert once constructed, and is based on the size of the culvert pipe in accordance with the following tabulation: Culvert Size 18" and less 21"-24" 30" 36" and greater COUNTY OF ROANOKE 9/22/15 Minimum Obstruction Allowance Factor 25% 20% 15% 10% 6-2 CULVERTS CULVERTS CHAPTER 6 6.2.3 Culvert Hydraulics A. Design Flow The design flow shall be the peak flow from the following frequency storm event, plus the appropriate obstruction allowance: Roadway Storm Frequency Primary & Arterial 25 -year Secondary & Other 10 -year These frequencies are minimum values. Designing for less frequent storms may be required where there is potential damage to structures, loss of human life, injury, or heavy financial loss in the event of flooding. Compliance with the National Flood Insurance Program (NFIP) is necessary for all locations where construction will encroach on a 100 -year frequency flood plain. In addition, the 100 -year peak flow (without the addition of the obstruction allowance) shall be routed through all culverts, determining the headwater depth behind the culvert with road overtopping, to ensure that buildings and other structures are not flooded and that adjacent roadways and adjacent properties do not suffer significantly increased damage during the 100 -year storm event. Storage impacts of water behind the culvert may be considered in the calculation, but is not required. B. Allowable Headwater The allowable headwater is the depth of water that can be ponded at the upstream end of the culvert during the design condition, as measured from the culvert inlet invert. The allowable headwater depth shall be limited by the following conditions: • Headwater does not cause upstream property damage; • Headwater does not increase the 100 -year flood elevation, as mapped by NFIP; • During a design storm event, the water surface shall be a minimum of 18 inches below the shoulder of the road at the point where the culvert crosses under, or the low point of the road grade where the water would overtop the road; COUNTY OF ROANOKE 9/22/15 6-3 CULVERTS CULVERTS CHAPTER 6 • Headwater depth shall not exceed 1.5 times the diameter or height of the culvert barrel; • Headwater depth shall not be such that stormwater flows to other ditches or terrain, which permits the flow to divert around the culvert. • The maximum overtopping depths during an 100 -year storm event for various street classifications are as follows: Classification Max. Depth at Crown Max. Velocity Local 1 ft* 6 fps Collector 1 ft* 6 fps Arterial No Overflow No Overflow Highway No Overflow No Overflow * Street overflow during a 100 -year storm will not be allowed if the street is the only means of access for 40 or more residences. A variance to this requirement may be granted if the applicant shows that the connecting roads will be experiencing substantial overtopping during a 100 -year storm and that there is no benefit to enforcing this requirement. • In most instances, the roadway overtopping may be treated as a broad crested weir. C. Tailwater Conditions Tailwater is the water into which a culvert outfall discharges. Culvert design shall be based on tailwater conditions that could reasonably be anticipated during the design condition. • If an upstream culvert outlet is located near a downstream culvert inlet, the headwater elevation of the downstream culvert may establish the design tailwater depth at the upstream culvert. • If the culvert discharges into a lake, pond, stream, or other body of water, the maximum water elevation of the body of water during the design storm may establish the design tailwater elevation at the upstream culvert. D. Inlet and Outlet Control Culvert hydraulic design shall consider both inlet and outlet control conditions. For a culvert operating with inlet control, the flow capacity is governed by the inlet geometry. For an outlet control culvert, the inlet COUNTY OF ROANOKE 9/22/15 6-4 CULVERTS CULVERTS CHAPTER 6 geometry, barrel characteristics and tailwater elevation all impact the flow capacity. Minimum culvert performance is determined by analyzing both inlet and outlet control for a given flow and using the highest resulting headwater. (i) Inlet Control The following factors are considered when calculating inlet control headwater: • Inlet Area — cross sectional area of the culvert entrance face • Inlet Edge — projecting, mitered, headwall, or beveled edges are common • Inlet Shape — rectangular, circular, elliptical, or arch are common The nomograph for inlet control for circular concrete, corrugated metal and corrugated HDPE culvert pipe is included in Appendix 6A. Nomographs for calculating headwater and flow capacity for other pipe geometries are contained in the VDOT Drainage Manual. (ii) Outlet Control The following factors are considered when calculating outlet control headwater: • Manning's Roughness (n) — based on barrel material, for recommended n values, see the table in Appendix 6A. • Barrel Area — cross section perpendicular to the flow • Barrel Length • Barrel Slope • Tailwater Elevation Outlet control affects the hydraulic grade line of the flow through the culvert. To calculate the hydraulic grade, reference the equations for velocity, velocity head, entrance losses, friction losses, and exit losses contained in the VDOT Drainage Manual. COUNTY OF ROANOKE 9/22/15 6-5 CULVERTS CULVERTS CHAPTER 6 The nomograph for outlet control on circular concrete and corrugated metal pipe is included in Appendix 6A. For additional nomographs, cross sections, and pipe materials, see the VDOT Drainage Manual. E. Culvert Velocity Outlet velocity must be checked to assure that excessive erosion and scour problems will not occur. MS 19 from the VA E&SC Handbook requires that discharges be made to an adequate channel. Culvert outlet protection shall be provided in accordance with the standards and specifications for Outlet Protection and Riprap in the VA E&SC Handbook. Culverts under roads shall be provided with end sections or endwalls in accordance with the outlet protection requirements of the VDOT Drainage Manual. Where a special design is needed to reduce outlet velocity, it shall be designed in accordance with VDOT standards. The minimum velocity in a culvert barrel must be adequate to prevent siltation at low flow rates. At a minimum this velocity shall be 3 feet per second for a 2 -year storm event. 6.2.4 Structural Design All culverts shall be designed to withstand a HS -20 highway loading, unless it crosses under a railroad, in which case the culvert shall be designed for railroad loads. The structural design shall consider the depth of cover, trench width and condition, bedding type, backfill material, and compaction. 6.2.5 Materials Culverts, both public and private, shall be constructed of materials as follows: • Culverts in the VDOT right-of-way shall be VDOT approved materials in accordance with VDOT IIM-LD-121.15 and VDOT Standard PC -1. Minimum depths of cover are shown in the PC -1 details. • Public culverts not in the VDOT right-of-way shall be: o Reinforced concrete pipe (RCP) Class III minimum or greater as required by loading conditions/cover or box. COUNTY OF ROANOKE 9/22/15 6-6 CULVERTS CULVERTS CHAPTER 6 o Aluminized corrugated metal pipe (CMP), is allowed for private systems only for sizes 36 -inch diameter or smaller. Minimum gage thickness for CMP culverts shall be 16 gage for 30 -inch diameter and smaller. Minimum gage thickness for 36 -inch diameter CMP culverts shall be 14 gage. Trench design for CMP culverts shall meet ASTM or AASHTO standards. o Special CMP culverts including diameters greater than 36 -inch, elliptical, and arch designs will be considered on a case-by-case basis by the County of Roanoke for use as culvert pipe material in private storm drain systems. • Private culverts not in the VDOT right-of-way may be: o Reinforced concrete pipe (RCP) Class III minimum or greater as required by loading conditions/cover or box. o Aluminized corrugated metal pipe (CMP), for sizes 36 -inch diameter or smaller. Minimum gage thickness for CMP culverts shall be 16 gage for 30 -inch diameter and smaller. Minimum gage thickness for 36 -inch diameter CMP culverts shall be 14 gage. Trench design for CMP culverts shall meet ASTM or AASHTO standards. o Special CMP culverts including diameters greater than 36 -inch, elliptical, and arch designs will be considered on a case-by-case basis o Corrugated high-density polyethylene (HDPE) with an integrally formed smooth interior is allowed for sizes 48 -inch diameter or smaller. HDPE culvert pipe minimum cover must be in accordance with the County of Roanoke Inspection Specifications for HDPE Pipe contained in Chapter 7-B-11. 6.2.6 Culvert Sizes The minimum culvert size shall be 18 -inch diameter, except that culverts under private entrance roads or driveways may be 15 -inch diameter if it meets all design flow conditions. Culverts shall meet all cover conditions required. Where the site conditions preclude the use of a single culvert barrel to meet the design flow conditions, multiple barrel culverts are acceptable. COUNTY OF ROANOKE 9/22/15 6-7 CULVERTS CULVERTS CHAPTER 6 The maximum length of a culvert shall be 300 feet. A culvert longer than 300 feet shall have manholes or junction boxes and shall fall under the requirements of Chapter 7. 6.2.7 End Conditions End sections and headwalls shall normally be required on inlets and outlets, as described below. A. Prefabricated End Sections Prefabricated end sections, or flared end sections, provide for a better flow path, improving the design flow and headwater conditions. Prefabricated end sections shall be provided for culverts 18 -inch to 36 -inch diameter, except: • No end section is required for 15 -inch or 18 -inch diameter driveway culverts. • Where culvert alignment exceeds 20 feet in vertical elevation change or culvert slope exceeds a 2:1 slope, a standard concrete headwall shall be provided instead of a prefabricated end section. • Where a concrete headwall is provided. B. Concrete Headwalls and Structures Precast concrete headwalls shall be provided at all culvert inlets and outlets, unless other end conditions are allowed, as stated above. Precast concrete headwalls shall meet the requirements of the VDOT Standards and VDOT Specifications. Wingwalls may be required in conjunction with headwalls. Culvert pipes 48" or larger in diameter shall have concrete wingwalls. Wingwalls are generally used where the culvert is skewed to the normal channel flow or where the side slopes of the channel or roadway are unstable. Wingwalls shall meet the requirements of the VDOT Standards and VDOT Specifications. Wing walls shall be set at an angle between 30 degrees and 60 degrees from the headwall. Concrete aprons may be used at the entrance or the exit of culvert. Aprons are typically used where high velocities or headwater conditions may cause erosion upstream or downstream of the culvert. An apron shall not protrude above the normal stream bed elevation. COUNTY OF ROANOKE 9/22/15 6-8 CULVERTS CULVERTS CHAPTER 6 Special design concrete slab end treatment, per VDOT Standards, may be used as a concrete end section. 6.2.8 Multiple Barrel Culverts Multiple barrel culverts shall be allowed where single culverts cannot handle the design flow while meeting the required cover or headwater condition requirements. The design of multiple barrels should avoid the need for excessive widening of the upstream or downstream receiving channels. The minimum spacing between culverts in a multiple barrel culvert design shall be that required to provide adequate lateral support and allow proper compaction of bedding material under the pipe haunches. 6.2.9 Culvert Skew Where possible, culverts shall be installed parallel to the flow path. The maximum allowable skew shall be 45 degrees as measured from the line perpendicular to the roadway centerline. 6.2.10 Buoyancy Verify that culvert pipe, end sections, and concrete end wall structures will not fail under hydrostatic uplift conditions. Buoyancy force consists of the weight of water displaced by the pipe and fill material that is over the pipe (below the headwater depth). The force resisting buoyancy includes the weight of the pipe, weight of the water within the pipe, and the weight of fill material over the pipe. Buoyancy is more likely to be a problem where: • Lightweight pipe is used • Pipe is on a steep slope (usually inlet control with the pipe flowing partially full) • There is little weight on the end of the pipe (flat embankment slopes, minimum cover, and/or no endwalls) • High headwater depths (HW/D>1.0) Suitable cover, footings, or anchor blocks may be required to ensure the culvert's integrity during design conditions. COUNTY OF ROANOKE 9/22/15 6-9 CULVERTS CULVERTS 6.2.11 Debris and Trash Racks CHAPTER 6 In general, trash racks or debris deflectors shall not be used where other site modifications may be made to prevent excessive trash or debris from entering the culvert. However, they may be required at specific locations, by the County of Roanoke, where large amounts of storm debris may be anticipated. 6.3 Installation All culvert pipe, headwalls, end sections, outlets, and other peripheral structures shall be installed in accordance with VDOT requirements and the manufacturer's recommendations. The characteristics of the trench, bedding, and pipe material all impact the structural strength of the pipe system. The installed culvert conditions shall comply with the design assumptions and calculations. HDPE pipe installation shall comply with the County of Roanoke's Inspection Specifications for HDPE Pipe. A copy of this installation guide is provided in Chapter 7. 6.3.1 Bedding Material Bedding material and installation shall comply with the requirements of the VDOT Specifications. 6.3.2 Backfill Backfill shall be suitable material and shall be placed and compacted in accordance with VDOT Specifications. A minimum of 12" backfill shall be placed over the top of a HDPE or CMP culvert prior to placing pavement or other surface treatment. 6.4 Environmental Considerations and Fishery Protection Where compatible with good hydraulic engineering, a culvert shall be located in "dry" conditions. Where this is not possible, the culvert shall be located to minimize impacts to streams or wetlands. When a culvert is set in a perennial stream the invert of the culvert shall be set below the normal flow line of the stream as required in the VDOT Drainage Manual. The grade of the culvert shall not exceed the grade of the natural stream in the area. Where construction requires other environmental permits, the applicant shall be responsible for obtaining all necessary environmental permits and complying with their requirements. COUNTY OF ROANOKE 9/22/15 6-10 CULVERTS CULVERTS 6.5 Maintenance Requirements CHAPTER 6 The permittee is responsible for maintenance of culverts until construction is complete, including final clean up and site stabilization, to the satisfaction of the County of Roanoke. After the completion of construction, the property owner or responsible party is responsible for maintenance of all culverts not located in public easements. No one shall modify culverts in any way that impairs or restricts flow. The property owner shall periodically remove silt and sediment from the pipe and prune vegetation around the pipe entrance to avoid restricting flow capacity and shall correct erosion damage as necessary. All removed silt and sediment shall be properly disposed of away from storm drainage pipes and open channels and shall be properly stabilized with vegetation. COUNTY OF ROANOKE 9/22/15 6-11 CULVERTS CULVERTS APPENDIX 6A AIDS FOR STORMWATER CULVERT DESIGN FROM CHAPTER 8, VDOT DRAINAGE MANUAL Appendix 8B-1, Culvert Design Form LD -269 Appendix 8C-1, Nomograph for Inlet Control for Circular Concrete Pipe Appendix 8C-2, Nomograph for Inlet Control for Corrugated Metal Pipe Nomograph for Inlet Control for Corrugated HDPE Pipe Note: This table is not from the VDOT Drainage Manual. Appendix 8C-4, Nomograph for Critical Depth, Circular Pipe Appendix 8C-5, Nomograph for Outlet Control for Circular Concrete Pipe Appendix 8C-6, Nomograph for Outlet Control for Corrugated Metal Pipe Appendix 8D-1, Recommended Manning's n -Values APPENDIX 6A Note: This table has been modified from VDOT's standard to include additional pipe materials. Appendix 813-2, Entrance Loss Coefficients (I.), Outlet Control, Full or Partly Full COUNTY OF ROANOKE 9/22/15 6A-1 CULVERTS CULVERTS APPENDIX 6A CULVERT DESIGN FORM (VDOT LD -269) COUNTY OF ROANOKE 9/22/15 6A-2 CULVERTS SENSE ZONES ]LINEY IMEMENEEmu Inn �� 0MMEM MEEMESEEME MEMEMEMEN EMMEMMMEEMB Muloommill D MEN M MEMO 0 Imamommonal MEMO Boom MINE MESON s �IIIRI COUNTY OF ROANOKE 9/22/15 6A-2 CULVERTS CULVERTS APPENDIX 6A INLET CONTROL, CIRCULAR CONCRETE PIPE Boa, ��,� CHART 10 1166 O,ocla EXAMPLE (1) (42) {3} a}.,x L rtbs% [3.e t..i1 G. ir.lP0 {f. 1144 s,ovo 6. 4,cK)o aG I,dr 6• S. Pse000 fiM HEADWATER DEPTH FOR taEADIRAT -A SCALES 2153 CONCRETE PIPE CULVERTS LIIPPOW Imo-Py1LIC ROtBf JAN �1 REvism MA1f Io" WITH INLET CONTRIOL COUNTY OF ROANOKE 9/22/15 6A-3 CULVERTS IIP 215 0.0 g"wo [N 2.2 73 q.— , aoe in .aIkf." moo 0# 500 74 400 @, ■1 r I 500 i La 4d. too laid 49 ¢ 00 J a �L = �� go � I.G I.a7 U. 90 Kw ENTRANCE � SCALE 40 b TYPE 1.0 36 50 ilk sq.iri .411I ■ihk � 6 •9 **- Y to ct11 [Podell b14 30 h.sNr�l9 431 IFr.m ■nI t76]k.7E.•� 10 -24 6 T .7 6 *cal. I@1 or (3j pr■I.;1 a ',1 h-fiz-7.I17 Is I;2161 [ij.tk4A # mI. slfel*hr W eNn4j'INV 711rnq! 0 avid 4 dadid4, w r yams M I11u.tr4ll.d4 $ C I R} 11.0 �. HEADWATER DEPTH FOR taEADIRAT -A SCALES 2153 CONCRETE PIPE CULVERTS LIIPPOW Imo-Py1LIC ROtBf JAN �1 REvism MA1f Io" WITH INLET CONTRIOL COUNTY OF ROANOKE 9/22/15 6A-3 CULVERTS CULVERTS APPENDIX 6A INLET CONTROL, CIRCULAR CORRUGATED METAL PIPE 0 CHART 2 `@0 ��, 168 ,� ExbrapLE ISS 6,000 0.34 in.nrs 18.8 ravI S. (2) 5,000 9.66 E+l 44 4,000 ■ r' w -1w 6, Yg 5,000 120 F 2,000 i 1.r s.3 p� a 131 e.r •.s 4, �p Yn Iris 3. 4, A 46 1,000 3 ae N 84 » y� 640. 500 400 g• La TE 300 6, 60 y I 54 —46 100 J o c Q 60 � x• W r z I.0 I.0 42 o 9A 40 q., 1.0 ac uj ib 30 QW- ENT It AMC ac SGALE D TYPE � 9 2 {Ij Niro�arl , SQ «I Mllrrri rr ao-nlrrM Q la 616pY x'�— p 27 l 131 ■rrlog"A} 0 7 .7 a z 24 ,7 6 5 4o v4 rade {11 rF 01 Ira,ret 21 - 4 Mrrirantg Pir to 4Crir 11}, Fw* rsr rrrrltRr inWllertl liar ihrr4gM 3 G cod C m"pn, to orri#Ir ar .� I � Yllar+•rlr®. Z i 1.0 S ` 12 HEADWATER DEPTH FOR C, M. PIPE CULVERTS B,'rifau OF Ru®LFc rae■Oa .,.r. Igea WITH INLET CONTROL COUNTY OF ROANOKE 9/22/15 6A-4 CULVERTS CULVERTS APPENDIX 6A INLET CONTROL, CIRCULAR HDPE PIPE COUNTY OF ROANOKE 9/22/15 6A-5 CULVERTS 5000 L - 36 or'N.'s ; 3.0 feet) eiJ'sfL6 D §.+F� 5� ped 2.00 13 5.4y 4 C .Y�j _3 +t.'4+ 300 Boo iS }�.�io i T -48 L ,�: 1. I. W -K SCALE 40 D TYPELLi _. (1 etl l f2 'wered to 0 3 r��fcmi 10 Owe z qq '27 ;t 4 ?- 5 Tri usa scale €2 w- x.31 protest t ! r ally tr- scale e t 1, t�mi r �Pf33 i� , lraigfl Nnc in !Ine ih.-ctLPgh use D and 0 scaFn. or reve,-;49 as 2 HEADWATER DEPTH FOR " a CORRUGATED HDPE CULVERTS WITH INLET CONTROL COUNTY OF ROANOKE 9/22/15 6A-5 CULVERTS CULVERTS CRITCAL DEPTH, CIRCULAR PIPE 0 CHART 4 2 3 L La 0 J 4 APPENDIX 6A IQ 90 so 40 50 6.0 TO ao s4 too DISCHARGE - Q -GPS 7 r` w 4 �e CANNOT 999CEQ r4F' OF RiP� v.r _ o co 2; O 500 440 504 644 744 490"-�� DISCHARGE -4 - CFg m Lp BUREAU OF PuGLI G POM 5 JAN. 191.4 COUNTY OF ROANOKE 9/22/15 DISCKARGE.0 •CIFS 6A-6 SG CRITICAL DEPTH CIRCULAR PPE CULVERTS CULVERTS APPENDIX 6A OUTLET CONTROL, CIRCULAR CONCRETE PIPE r7 2v®v 19 [6 �$ -a it 840 12d 649 9�8 5DO 9R 4W4 @4 300 -TE 66 294 Ga �d -109 z t4 � 50 1- -40 � tT -30 a4 11 .20 Ila 19 [6 �$ -a it W 8UIKKA4 UkrrLST-vI&YCILT #jwrN4 FLIL . a Ra. wo4r c...r .ol ti�..q+i. spwpelt .f7M by - w4+61#1 #wnlM4 h I%* 4 wv wvp"NT xa HEAD FOR CONCRETE PIPE CULVERTS FLOWING F4J LL n - X LO 12 COUNTY OF ROANOKE 9/22/15 6A-7 CULVERTS CULVERTS APPENDIX 6A OUTLET CONTROL, CIRCULAR CORRUGATED METAL PIPE 2000 COUNTY OF ROANOKE 9/22/15 mw i � h4 J F '611/ ENGEG OtUTLCf CU6-4CRT Fri WING, FULL J'V eriler IFGW5 Mp auifiFidP4j, CWPLOO H* bF .� nupkwii Hlfiri My 1. me 79fi4ern p14140ri L Q 'F4 0 b W # pf? Soo f'Q0 to HEAD FOR STANDARD C. M. PIPE CULVERTS FLOWING FILL n = 0,024 6A-8 CULVERTS b00 Ix0 b00 100 #00 90 300 0* Sao :a os 40 4# Z 100 W 40 4# 60 i z 40 33 �a.o- 4 �7 20 24 21 I0 16 COUNTY OF ROANOKE 9/22/15 mw i � h4 J F '611/ ENGEG OtUTLCf CU6-4CRT Fri WING, FULL J'V eriler IFGW5 Mp auifiFidP4j, CWPLOO H* bF .� nupkwii Hlfiri My 1. me 79fi4ern p14140ri L Q 'F4 0 b W # pf? Soo f'Q0 to HEAD FOR STANDARD C. M. PIPE CULVERTS FLOWING FILL n = 0,024 6A-8 CULVERTS CULVERTS APPENDIX 6A OUTLET CONTROL, CIRCULAR CONCRETE PIPE RECOMMENDED MANNING'S n -VALUES Type of Conduit Wall Description Manning's n Concrete Pipe Smooth walls 0.010 - 0.013 Concrete Boxes Smooth walls 0.012 - 0.015 Corrugated Metal 2 2/3 by'/2 inch 0.022 - 0.027 Pipes and Boxes, Annular or corrugations Helical Pipe 6 by 1 inch 0.022 - 0.025 corrugations 5 by 1 inch 0.025 - 0.026 corrugations 3 by 1 inch 0.027 - 0.028 corrugations 6 by 2 inch 0.033 - 0.035 structural plate 9 by 2 1/2inch 0.033 - 0.037 structural plate Corrugated Metal 2 2/3 by 1/2 inch corrugations 0.012 - 0.024 Pipe Spiral Rib Metal Smooth walls 0.012-0.013 (Steel or Alum.) PVC Smooth interior 0.010-0.0 Polyethylene (PE or HDPE) Smooth interior 0.011 - 0.013 Corrugated PE or HDPE I Corrugated interior 0.022 - 0.026 Note I: The values indicated in this table are recommended Manning's "n" design values. Actual field values may vary depending on the effects of abrasion, corrosion, deflection, and joint conditions. Concrete pipe with poor joints and deteriorated walls may have "n" values of 0.014 to 0.018. Corrugated metal with join and wall problems may also have higher "n" values, and in addition, may experience shape changes which could adversely affect the general hydraulic characteristics of the culvert. Note 2:17ore further information concerning Manning n values for selected conduits consult Hydraulic Design of Highway Culverts, Federal Highway Administration, HDS No. 5, page 163. COUNTY OF ROANOKE 9/22/15 6A-9 CULVERTS CULVERTS APPENDIX 6A ENTRANCE LOSS COEFFICIENTS (Ke) OUTLET CONTROL, FULL OR PARTIALLY FULL Type of Structure and Design of Entrance Coefficient Pipe, Concrete Mitered to conform to fill slope 0.7 End -section conforming to fill slope 0.5 Projecting from fill, square cut end 0.5 Headwall or headwall and wingwall Square -edge 0.5 Rounded (radius = 1/12 D) 0.2 Socket end of pipe (groove end) 0.2 Projecting from fill, socket end (groove end) 0.2 Beveled edges, 33.7° or 45° bevels 0.2 Side or slope -tapered inlet 0.2 Pipe, Corrugated Metal (or Corrugated HDPE) Projecting from fill (no headwall) 0.9 Mitered to conform to fill slope, paved or unpaved slope 0.7 Headwall or headwall and wingwall, square -edge 0.5 End section conforming and to fill slope 0.5 Beveled edges, 33.7° or 45° bevels 0.2 Side or slope -tapered inlet 0.2 Box, Reinforced Concrete Wingwalls parallel (extension of sides), 0.7 square edged at crown Wingwalls at 10° to 25° or 30° to 75° to barrel, square edged on 3 edges 0.5 rounded on 3 edges to radius of 1/12 barrel 0.2 Wingwalls at 30° to 75° to barrel, crown edge rounded to radius 1/12 of barrel 0.2 Side or slope -tapered inlet 0.2 Note: End Section conforming to fill slope made of metal, concrete, or HDPE, are the sections commonly available from manufacturers. From limited hydraulic test they are equivalent in operation to a headwall in both inlet and outlet control. Some end sections incorporating a closed taper in their design have a superior hydraulic performance. These latter sections can be designed using the information given for the beveled inlet. COUNTY OF ROANOKE 9/22/15 6A-10 CULVERTS STORM DRAINS Chapter 7 - Storm Drains CHAPTER 7 A storm drain is a drainage system that conveys water or stormwater, consisting of two or more pipes in a series connected by one or more structures. Storm drains collect and transport stormwater from a site primarily through the use of a closed pipe network. For the storm water to be efficiently handled in a storm drain, the site must also have an efficient way to collect stormwater runoff and have it enter into the piped network. Once in the storm drain, the stormwater is routed to a discharge outfall. Storm drain systems include: • Measures to get stormwater runoff to inlets, • Inlets, and • Storm drain pipes and structures that stormwater runoff must pass through to reach the outfall This section defines criteria and restrictions that shall be used in designing and constructing public and private storm drains. See the VDOT Drainage Manual for more in-depth information. All storm drains 12 inches in diameter and larger shall have profiles prepared and submitted to the County. A storm drainage schedule shall be included on the grading sheet in a chart that indicates the inlet number, rim, invert in, invert out, pipe length, pipe size, pipe material, and slope, and to which inlet the pipe flows to. 7.1 References Except where more stringent requirements are presented in this Manual, storm drain collection systems shall comply with VDOT and other state requirements. The primary design reference is the VDOT Drainage Manual. Other appropriate references include: • VDOT Standards • VDOT Specifications • VA E&SC Handbook • FHWA Drainage of Highway Pavements HEC No. 12. • FHWA Urban Drainage Design Manual HEC No. 22. • VA Stormwater Management Handbook, Chapter 6 Appendix 6B (Karst Guidelines) COUNTY OF ROANOKE 9/22/15 7-1 STORM DRAINS STORM DRAINS 7.2 Design Methodology and Criteria 7.2.1 Computation Methods CHAPTER 7 Manual computations use design equations and nomographs. Results are documented on VDOT work sheets. Copies of these forms are included in Appendix 7A. • Form LD -204 Stormwater Inlet Computations • Form LD -229 Storm Drain Design Computations • Form LD -347 Hydraulic Grade Line Computations There are a number of computer programs available to design storm drainage systems. Any of these computer programs will be acceptable if their methodologies are based on the same equations and nomographs accepted by VDOT, and if they provide the same documentation of inputs, assumptions, and output as are contained on VDOT's work sheets. Computation methods are explained in detail, including comprehensive design examples, in the VDOT Drainage Manual. 7.2.2 Hydrology A. Design Flow Methodology Calculations establishing the design flow shall be submitted with the Stormwater Management Plan. Design flows shall be based on ultimate build -out of the contributing watershed based on the current Comprehensive Plan. 7.2.3 Design Flows The following minimum storm frequencies shall be used: A. Inlets Inlets shall be designed for storm frequencies and intensities consistent with the VDOT Drainage Manual. For reference, the VDOT table and its accompanying notes have been included in Appendix 7A. COUNTY OF ROANOKE 9/22/15 7-2 STORM DRAINS STORM DRAINS B. Storm Drains CHAPTER 7 Storm drains shall be designed for the storm frequencies and intensities consistent with the VDOT Drainage Manual. For reference, the VDOT table and its accompanying notes have been included in Appendix 7A. Unless otherwise specified by the VDOT Drainage Manual, a 10 -year frequency design storm shall be used in developing design flows. 7.2.4 Measures to Convey Stormwater Runoff to Inlets A. Pavement Drainage One objective in the site design is to collect and remove stormwater runoff from critical areas as efficiently as possible. A properly designed system will ensure that roadway surfaces are free of stormwater accumulations, and will protect the public from unnecessary hazards associated with water ponding and sheet flow. Except where porous pavement is used, road pavement shall be sloped transversely to drain stormwater from the roadway. A minimum cross slope of 2 percent should be applied to all roads, both primary and secondary. Greater slope should be considered where poor drainage is anticipated. Drainage structures associated with medians, curbs, and gutters should be designed to minimize accumulation of water onto travel lanes of roadways. For additional information concerning drainage of highway pavements, refer to FHWA HEC No. 12. B. Curb and Gutter Curb and gutter at the edge of pavements may be used to collect stormwater runoff from roadways. Curbing captures stormwater runoff and directs it to stormwater collection inlets while protecting adjacent properties from flooding and erosion due to sheet flow runoff from the impervious roadways. A curb and gutter forms a triangular conveyance channel. When a storm occurs, the runoff from the road creates a spread of water from the curb. The curb and gutter must be designed to convey this flow and prevent the spread of water from impacting traffic. The spread width of flow is determined by using VDOT nomographs or acceptable hydrological COUNTY OF ROANOKE 9/22/15 7-3 STORM DRAINS STORM DRAINS CHAPTER 7 design software. For curb and gutter flow, a Manning's n value of 0.015 is used in the computational analysis. See Appendix 7A for width of maximum allowable spread. Curb and gutter dimensions and design shall meet VDOT Standards. C. Open Channels Open channels may be used to collect site drainage and convey it to a storm drain inlet. Design requirements for open channels are covered in Chapter 5. 7.2.5 Storm Drain Inlets A. General Storm drain inlets are used to collect stormwater runoff from roads, walks, or low elevations during storm events and provide a method for passing the stormwater into the storm drain system. This is usually accomplished by placing storm drain inlets at regular intervals, low points, or at key locations to intercept flows and control the stormwater spread width. The design criteria for limiting the spread of water on travel lanes are contained in the VDOT Drainage Manual. The current design table and its notes have been included in Appendix 7A There are several different types of storm drain inlets which can be used to meet this purpose, and the designer shall choose the proper inlet structure based upon site conditions and design conditions to maximize the drainage efficiencies. • Curb • Grate • Slotted Drain/Trench • Combination Drainage and Stormwater management plans shall include a contour plan with sufficient contours shown to indicate proper drainage. B. Curb Inlets Curb inlets are vertical openings in the curb covered by a top slab. These inlets can convey large quantities of water, but also allow for large amounts of debris to enter the storm drain system. COUNTY OF ROANOKE 9/22/15 7-4 STORM DRAINS STORM DRAINS CHAPTER 7 Curb inlets shall be used to the maximum extent possible for pavement drainage. C. Grate Inlets Grate inlets are horizontal grates usually used in depressed medians or other low elevations. Grate inlets are often referred to as drop inlets or DIs. Grate inlets shall be avoided in paved areas. Where they are used in pavement, inlet grates shall be bicycle safe. D. Combination Inlets Combination inlets combine both the vertical opening used by curb inlets and the horizontal grate used in grate inlets. These inlets are often used when the inlet chamber is required to be under the gutter or street pavement away from the sidewalk or other utilities. Combination inlets shall be avoided where possible. Where they are used, they shall have bicycle safe grates. E. Slotted Drain Inlets Slotted drain inlets are a narrow slotted opening which can collect flow at a median barrier or curb. These inlets are usually located in areas of limited space and can be used to intercept sheet flow, or collect gutter flow to help reduce ponding depth or spreading at grate inlets. F. Inlet Locations Inlets shall be located to meet the design requirements of the VDOT Drainage Manual for maximum spread width. In addition, inlets shall be provided, regardless of contributing drainage area as follows: • Sag points in the gutter grade; • Upstream of median breaks, crosswalks, and street intersections; • Immediately upstream and downstream of bridges; • On side streets at intersections, where flow is approaching the main line; • Behind curbs, shoulders, or sidewalks to drain low areas or intercept concentrated flow; and COUNTY OF ROANOKE 9/22/15 7-5 STORM DRAINS STORM DRAINS CHAPTER 7 • Any low elevation in the grade. Inlets shall be avoided in pathways likely to be used by pedestrians or bicyclists. G. Access All inlets shall have a removable grate or manhole cover to allow access for clean out. All structures greater than 3 feet in depth shall be a minimum of 4 feet in diameter for maintenance access. H. Inlet Capacities The capacities of each inlet type are contained in the VDOT Drainage Manual. Documentation of inlet capacity shall be made on VDOT Form LD -204, Stormwater Inlet Computations or equivalent. I. Separation of Pipes in Inlets Where two or more pipes enter a concrete structure at or near the same elevation, a 6" minimum horizontal clearance must be maintained between the pipes. Additional clearance between pipes shall be provided if required to protect the structural integrity of the structure. J. Karst Terrain Water tight joints are required where storm drainage pipe are located in karst terrain. Additionally, an A -lock premium gasket or boot is required for the pipe connection to the storm drainage structure to prevent water loss at the structure connection. 7.2.6 Storm Drain Pipes A. Flow Capacity Based on the size and slope of the storm drain, the design capacity for a pipe flowing full can be determined using Manning's equation. Where: Q= A x 1.49/n x R213 x S112 Q = Flow in the pipe (cfs) A = Area of the pipe (ft2) COUNTY OF ROANOKE 9/22/15 7-6 STORM DRAINS STORM DRAINS CHAPTER 7 R = Hydraulic radius, for circular pipe R=Diameter/4 (ft) S = Storm drain slope (ft/ft) n = Pipe roughness coefficient The design flow capacity of a storm drain shall comply with the design frequencies set forth in VDOT Drainage Manual as shown in the table in Appendix 7A. In a roadway underpass, or depressed section, where ponded water can only be removed through the storm drain system, a 100 - year frequency storm event shall be used to design the storm drain at the sag point. Storm drain flow capacities shall be documented on VDOT Form LD -229, Storm Drain Design Computations or equivalent form. B. Storm Drain Slope To deter the settling of debris and sediment in the storm drain pipe, the pipe shall be designed to ensure positive slope and maintain a minimum velocity of 3 feet per second during a 2 -year frequency storm or a minimum of 0.5% slope, whichever is more restrictive. A minimum drop across the structure of 0.1' shall be provided in all storm drainage structures. The maximum pipe velocity (Qio) in any storm drain shall be in accordance with VDOT requirements based on the storm drain material, but in no event shall it be greater than 20 fps. Storm drains shall be sloped to meet the velocity requirement set in this chapter. Slopes greater than 16 percent shall be avoided if possible. If unavoidable, drop structures shall be utilized in steeper terrain. In addition, storm drains with slopes steeper than 16% must have anchor blocks for support. C. Pipe Size All storm drains located in public easements or rights-of-way shall be a minimum of 15 -inch diameter. Pipe size shall not be reduced along the direction of the flow, except as required for proper operation of stormwater management facilities. D. Access Regardless of pipe size, a cleanout access point, either an inlet, manhole, or junction box shall be provided at a maximum of every 300 feet of pipe. COUNTY OF ROANOKE 9/22/15 7-7 STORM DRAINS STORM DRAINS CHAPTER 7 Cleanouts can be used for pipes 6" and smaller. All pipes over 6" require an inlet or manhole. E. Joints At a minimum, all joints shall be "soil tight". The County strongly recommends the use of "water -tight" joints under pavements and areas that are stormwater "hotspots". "Water -tight" joints are required for karst terrain. See Section IV and corresponding ADS detail in Appendix 7B for additional info in water tight joints. 7.2.7 Determination of Hydraulic Grade Line A. General The hydraulic grade line represents the free water surface elevation of water in a pipe system. Where the hydraulic grade line is above the top of a pipe, the pipe is flowing under pressure. The hydraulic grade line in a manhole or other structure is the elevation to which water will rise. Hydraulic grade lines shall be calculated and evaluated for all storm drains. The hydraulic grade line shall be calculated using VDOT methods and equations that are fully described in the VDOT Drainage Manual. Calculations shall be documented on VDOT Form LD -347, Hydraulic Grade Line Computations, or equivalent. A copy of this form is included in Appendix 7A. Hydraulic grade lines can also be calculated with design software (ie Storm sewer, etc.) The hydraulic grade line shall not exceed any critical elevation during the design storm. Critical elevations include rising above the ground elevation at inlets or other structures, or reaching an elevation where storm flow could back-up to cause flooding damage. The calculation of the hydraulic grade line begins at the system outfall and proceeds upstream to each structure on the system. The calculation is based on the principal of conservation of energy as shown below and includes major and minor energy losses: HGLus = HGLas + Hf + Hm Where: HGLus = Elevation of hydraulic grade line at the upstream structure H. = Summation of minor head losses (junctions, bends, etc.) Hf = Pipe friction loss COUNTY OF ROANOKE 9/22/15 7-8 STORM DRAINS STORM DRAINS CHAPTER 7 HGLas = Elevation of hydraulic grade line at the downstream structure Major head losses are attributable to friction losses within the pipe. Minor head losses include losses from: • Junctions • Exits • Entrances • Bends in Pipes • Access holes • Conflict pipes • Plunging flow • Expansions and contractions • Appurtenances such as weirs, diverters, valves and meters B. Outfall Conditions The hydraulic grade line starts at the system outfall. At this point the hydraulic grade line shall be the actual tailwater elevation or the elevation of 0.8 times the diameter of the outlet pipe, whichever is higher. If the system discharges into a detention or retention pond, the hydraulic grade shall start at the 10 year water surface elevation. C. Pipe Friction Losses The friction slope is the energy slope for that run of pipe. The friction slope is determined by inserting pipe information and design flow into Manning's equation and solving for S (slope). The total friction headloss in the run of pipe is the friction slope multiplied by the length of the run. Where the hydraulic grade line falls below the crown of the pipe, the elevation of normal flow is the hydraulic grade line. D. Junction Losses 1. General Junction head losses are the summation of entrance (Hi), exit (Ho), and bend losses (HA). When calculating junction losses it is important to use actual flow velocities. If pipes are flowing partially full, then partially full velocities are used. COUNTY OF ROANOKE 9/22/15 7-9 STORM DRAINS STORM DRAINS CHAPTER 7 2. Entrance (expansion) Losses Entrance loss at a junction is given by: Hi = Ki (V,2 / 2g) Where: Hi = Entrance head loss Ki = Entrance loss coefficient. Ki = 0.35 V; = Velocity in the inlet pipe. Where more than one inlet pipe is present, use the velocity from the pipe that has the greatest momentum (Q*V) g = Gravitational acceleration constant, 32.2 ft/s2 3. Exit (contraction) Losses Exit loss at a junction is given by: Ho = Ko (V02 / 2g) Where: Ho = Exit head loss Ko = Exit loss coefficient. Ko = 0.25, except that Ko = 0.3 when computing the loss leaving the initial inlet Vo = Velocity in the outlet pipe. g = Gravitational acceleration constant, 32.2 ft/s2 4. Bend Losses Bend loss at a junction are dependent on the angle between the inlet and outlet pipes. If the inlet and outlet pipe are in line with one another no bend) the angle is 0 degrees and there is no bend loss. As the angle increases towards 90 degrees, the bend loss increases. Storm drain systems should not be designed with bend angles greater than 90 degrees. The bend loss is given by: Ho = K (V,2 / 2g) Where: Ho = Head loss at bend K = Bend loss coefficient. K is determined by consulting Figure 9-10 in the VDOT Drainage Manual. A copy is included in appendix 7A. Vi = Velocity in the inlet pipe. COUNTY OF ROANOKE 9/22/15 7-10 STORM DRAINS STORM DRAINS CHAPTER 7 g = Gravitational acceleration constant, 32.2 ft/s2 5. Plunging Losses Where surface inlet inflow is 20 percent or more of the total flow through a junction, or when a lateral pipe enters a junction with its invert elevation above the crown of the outgoing pipe and the flow in the lateral pipe is 20 percent or more of the total flow through the junction, the total headloss from the structure (Hi + Ho + Ho) shall be multiplied by 1.3 (increased by 30 percent). This adjustment is cumulative with the adjustment for inlet shaping. 6. Inlet Shap Inlet shaping refers to how the invert is shaped to provide smooth flow through the structure and is required in all manholes and inlets. When VDOT Standard IS -1, inlet shaping, is used in a structure the total headloss from the structure (Hi +Ho + Ho) shall be multiplied by 0.5 (decreased by 50 percent). This adjustment is cumulative with the adjustment for plunging losses. 7.2.8 100 -Year Conditions Where there is the possibility of building structures flooding, conditions during the 100 -year storm shall be analyzed to verify that all existing and proposed structures do not flood. Flow from the 100 -year storm may be carried overland as well as by the storm drain system. 7.2.9 Materials A. Structures • All stormwater structures (inlets, manholes, and junction boxes) located in public easements or rights-of-way shall be precast or cast -in- place concrete. All structures, frames, grates, and covers shall be in accordance with VDOT Standards and VDOT Specifications. • All storm drain structures over four (4) feet in depth must have steps. COUNTY OF ROANOKE 9/22/15 7-11 STORM DRAINS STORM DRAINS B. Storm Drain Pipe CHAPTER 7 • Storm drains in the VDOT right-of-way shall be VDOT approved materials in accordance with VDOT IEv4-LD-121.15 and VDOT Standard PC -1. • Storm drains not in the VDOT right -of way shall be: o Reinforced concrete pipe (RCP). o Corrugated high-density polyethylene pipe (HDPE) with an integrally formed smooth interior is allowed for sizes 48 -inch diameter or smaller. HDPE pipe is allowed for pipe slopes less than 12% and with a velocity 12 fps or less. HDPE culvert pipe cover must be in accordance with the County of Roanoke Inspection Specifications for HDPE Pipe. A copy of this document is included in Appendix 7B. o Culverts 60 inches in diameter or greater may be Corrugated Aluminized Metal Pipe (CAMP) or corrugated aluminum with a minimum 14 gauge metal. o The minimum cover for all pipes is two (2) feet measured from the final surface. Special applications for less than two (2) feet of cover will be reviewed and approved by the County Engineer individually. The maximum cover for storm drainage pipes shall at a minimum comply with the requirements of the Virginia Department of Transportation Design Manual. 7.2.10 Structural Design All inlet structures, frames and grates; and pipes shall be designed to withstand a HS -20 loading, unless a pipe crosses a railroad, in which case the pipe shall be designed for railroad loads. The structural design shall consider the depth of cover, trench width and condition, bedding type, backfill material, and compaction. 7.3 Installation All inlets, pipes, and associated structures shall be installed in accordance with VDOT Specifications and the manufacturer's recommendations. The characteristics of the trench, bedding, and pipe material all impact the structural strength of the pipe system. The installed pipe conditions shall comply with the design assumptions and calculations. COUNTY OF ROANOKE 9/22/15 7-12 STORM DRAINS STORM DRAINS CHAPTER 7 HDPE pipe installation shall comply with the County of Roanoke Inspection Specifications for HDPE Pipe. A copy of this document is included in Appendix 7B. Storm drains shall not be installed through contaminated soils or groundwater. 7.3.1 Bedding Material Bedding material and installation shall comply with the requirements of the VDOT Specifications. Use Class I backfill (crusher run and #21) to one foot over the pipe for HDPE, up to the spring line for RCP. #57 stone is not allowed as pipe bedding. 7.3.2 Backfill Backfill shall be suitable material and shall be placed and compacted in accordance with the VDOT Specifications (PB -1 detail). Use Class I backfill (crusher run) to one foot over the pipe for HDPE, and up to the spring line for RCP. A minimum of 12" cover shall be placed over the top of a storm drain pipe prior to placement of pavement or other surface treatment. Additional minimum depth of cover shall be provided if recommended by the manufacturer. All pipe installed must be inspected and approved by the County's Inspector prior to any backfill being placed. The Contractor must provide 24 hour notice to County prior to installing backfill so that County staff can be present for inspections. 7.3.3 Separation of Utilities Where storm drains cross other utilities, at least 1 -foot of vertical separation shall be provided. Where 1 -foot of vertical separation cannot be provided, special provisions shall be made in the bedding and backfill to avoid settlement that could cause point loadings on the storm drain or other utility. Water lines shall not pass through a storm drain inlet or manhole. 7.4 Environmental Impacts Construction or modifications to storm drains shall comply with all applicable laws and regulations. The applicant is responsible for procuring all necessary permits. COUNTY OF ROANOKE 9/22/15 7-13 STORM DRAINS STORM DRAINS 7.5 Erosion Protection at Outfalls CHAPTER 7 Erosion protection at storm drain outlets shall be provided in accordance with the outlet protection standards contained in the VA E&SC Handbook and the VDOT Drainage Manual. 7.6 Maintenance Requirements The permittee is responsible for maintenance of storm drains until construction is complete, including final clean up and site stabilization, to the satisfaction of the County. COUNTY OF ROANOKE 9/22/15 7-14 STORM DRAINS STORM DRAINS APPENDIX 7A AIDS FOR STORM DRAIN SYSTEM DESIGN FROM CHAPTER 9, VDOT DRAINAGE MANUAL Table 9-1, Criteria for Inlet Design Table 9-2, Design Frequencies for Storm Drain Conduit Notes that accompany Table 9-1 and Table 9-2 Figure 9-10, Losses in Junction due to Change in Direction of Flow Lateral Appendix 913-1, LD 204 Stormwater Inlet Computations Appendix 913-2, LD 229 Storm Drain Design Computations Appendix 913-3, LD 347 Hydraulic Grade Line Computations Appendix 9C-1, Flow in Triangular Gutter Sections Appendix 9C-3, Flow Characteristic Curves (24" Gutter)- VDOT Standard Appendix 9C-23, Manning's Solution for Flow in Storm Drains APPENDIX 7A Appendix 9C-24, Nomograph for Computing Required Size of Circular Drain for Full Flow Appendix 9C-25, Concrete Pipe Flow Nomograph COUNTY OF ROANOKE 9/22/15 7A-1 STORM DRAINS STORM DRAINS CRITERIA FOR INLET DESIGN APPENDIX 7A DESIGN FREQUENCIES FOR STORM DRAIN CONDUIT Roadway Classification Design Speed Design Storm Maximum Design Roadway (mph) S read Width p Frequency Intensity Classification With or Without Shoulder All 10 eari,' in/hour (ft) Principal Arterial <50 10 Actual Sh. Width +3 On Grade >50 10 Actual Sh. Width 3 Sag 10 Actual Sh. Width +3 Locations All On Grade <50 N/A4 4 '/2 Driving Lane + Gutter — Width (If Any) On Grades >50 10 Actual '/z Driving Lane + Gutter Width (If Any) o <50 N/A4 4 '/2 Driving Lane + Gutter Sag — Width (If Any) Locations >50 50 Actual '/z Driving Lane + Gutter Width If An Minor Arterial, Collector, Local On Grade <50 N/A4 4 Sh. Width +3 >50 N/A4 4 Sh. Width 3 Sag N/A4 4 Sh. Width +3 Location All On Grade All N/A4 4 '/2 Driving Lane + Gutter o Width (If Any) y N/A4 4 '/2 Driving Lane + Gutter Location All Width (If Any) DESIGN FREQUENCIES FOR STORM DRAIN CONDUIT Roadway Classification Design Speed (mph) Design Storm Frequency (year',2) Principal Arterial With Shoulder All 25 Without Shoulder 50 10 < <50 25 Minor Arterial, Collector, Local With or Without Shoulder All 10 COUNTY OF ROANOKE 9/22/15 7A-2 STORM DRAINS STORM DRAINS APPENDIX 7A NOTES - CRITERIA FOR INLET DESIGN AND DESIGN FREQUENCIES FOR STORM DRAIN CONDUIT Notes 1 through 3 are General Notes and should be applied to any functional classification roadway where the site conditions are comparable to the conditions described in each note. ' At locations where the vertical alignment of the roadway creates a sag condition in either a depressed roadway section or a roadway section utilizing concrete barriers, and ponded water on the roadway can only be removed through the storm drain system, a 50 -year storm frequency and the actual time of concentration should be used as the design criteria for both the drop inlet and the pipe system. z Federal Flood Insurance criteria dictate that the effects of the 100 -year storm event (using the actual time of concentration) on buildings insured under the Flood Insurance Program must be investigated. Such cases should only be encountered where the roadway traverses a designated floodplain area containing insured buildings and the depth of water on the pavement is sufficient to overtop the curb and flow to the buildings. 3 The maximum design spread width may not be obtainable due to the pavement/shoulder slope and the height of the curb. In locations where the curb would be overtopped and water would escape the roadway section prior to achieving the maximum design spread with, the maximum depth of ponded water allowed adjacent to the curb for the design storm shall be curb height minus one (1) inch. Notes 4 through 5 should normally be applied to the specific locations as noted in the criteria table. 4 At location where it may be reasonably anticipated that the runoff from storm events with rainfall intensities greater than 4 inches per hour will overtax the drop inlet system to the point that excess flow will escape the roadway section and result in potential damage to the adjacent property and/or roadway right of way, the drop inlet system shall be analyzed for a check storm event with a rainfall intensity of 6.5 inches per hour. If all of the runoff from the check storm event is found to be contained within the roadway section, both at the site and down grade, or if runoff escaping the roadway section is found to not be damaging to adjacent property, the drop inlet system may be used as originally designed under the general criteria. If the drop inlet system fails to meet the check storm criteria, it must be re -designed to accommodate the runoff from the check storm event. 5 Drop inlets in these locations are prone to clogging and are often located in areas where maintenance is difficult. To compensate for partial clogging, the computed slot length value should be adjusted by multiplying by a factor of two (2). The adjusted computed slot length value should then be used to determine the slot length specified on the plans. COUNTY OF ROANOKE 9/22/15 7A-3 STORM DRAINS STORM DRAINS APPENDIX 7A LOSSES IN JUNCTION DUE TO CHANGE IN DIRECTION OF FLOW LATERAL l � a� ,�1J0/f r � r HL= } V1 = Val ty of flag min fateml In f,p_e_ g Acceleration due to 9favltij, 32 f,rseclseo HLA Feat of head IQs# in Jct. due to I chang$ in djr lateral flow = Fetor frorn graph 9 I I { 0 0_1 0.2 0.3 0_4 0.5 0.6 Facto r 40 C0 s 20 r 0 0.7 COUNTY OF ROANOKE 9/22/15 7A-4 STORM DRAINS STORM DRAINS APPENDIX 7A STORMWATER INLET COMPUTATIONS (VDOT LD -204) COUNTY OF ROANOKE 9/22/15 7A-5 STORM DRAINS ��i���iiiiiiiii�■� .................. B - Eis COUNTY OF ROANOKE 9/22/15 7A-5 STORM DRAINS STORM DRAINS APPENDIX 7A STORM DRAIN DESIGN COMPUTATIONS (VDOT LD -229) m0 ca� N yEN LJ j COUNTY OF ROANOKE 9/22/15 7A-6 STORM DRAINS ';sem i iii uiiiiiilliillli COUNTY OF ROANOKE 9/22/15 7A-6 STORM DRAINS STORM DRAINS APPENDIX 7A HYDRAULIC GRADE LINE COMPUTATIONS (VDOT LD -347) 19 b ui uu LL US CV o r r r r�L7 0 J z z' � r 7 o� -y -Fl- -T, d i m ffi oul w HW W M .j r i kl� COUNTY OF ROANOKE 9/22/15 7A-7 STORM DRAINS STORM DRAINS APPENDIX 7A FLOW IN TRIANGULAR GUTTER SECTIONS Sig g x.96- 1`67 05 T2'67 �S n k ;x3 oLo f /� ry; 0.ce 4 FIND* . 4.J 5 ica \ i. .0-006 0-0 on .0.038 �1'�' 0.4 # c0 T 33 * (FT) "4.AAice g x.96- 1`67 05 T2'67 n FIND* ay 0 a 2 ,4 rT 5v on .0.038 �1'�' 0.4 c0 T 33 * (FT) 1 jp w 0.06 4 p 4 1si 9 #} Forri ape, use ,he P,Omyrai h a Q'4 *sz Ski 5x1i{Sd t SX2) 2) To 4'eW rains d sc[igrgIe in guter with tcL2 ttmPOS4 cmas 8�*pis. flAd Qs ffmriq Te and 8$, Th*n, v App. 9C,9 to find Eo. The Waidi,args is Q=WJJ-E L aftd QWwo-41r. COUNTY OF ROANOKE 9/22/15 7A-8 STORM DRAINS llRI9FRSF+!liY+a4.,®�7aria�y�rarl..sNaiTl� ■■ ■.aa��..gbR7ra�liF91!■!t7■0I=0MR if RIum!llmmuMOM, ie■u4 Rr+i g11++1#!!A*!olRl!■l #i!■i!! on: a.i V tref ■. r■.■aI': ■R■RR+! M lPl#P:1!!■■+IIJ•■■lf.atl+,a1F�Y!'Jl doillhl' 'l�1 X111+�1111J•!!�■lai■■■ R iR��;.#��� RJ IIMIFI�.Ir no ME 2100A --------:ail --- �i���u._ ___.w:::9� ��41iF,!*. TF:■RdF ■ri�a'ddriF'il l".AF i iP 11 Jl■iod. 1R ■1, R�"F11( JdlPs. ri.."!1 1 mWillop"WC!i11110 ,furl �klp14 J�J■�R��1�11111 .s �++!ill!lIFIJ! mail,� •�n��isiii�`aitii+iiii��a ■i�l�rilnrJu muaJl *■■*■n�1r,1 111k1lI �i■■■■�IG1111 IMAsC.■�111�reJt *411M STORM DRAINS APPENDIX 7A MANNING'S SOLUTION FOR FLOW IN STORM DRAINS 2400 zoco 11500 to0o BOO Goo 150 400 ZOO loo 60 60 50 40 Ub 0 10 a 4 3 Na 1.0 G. IS C. 6 13.5 Cl. 4 0.3 AJ ME 11810 L29 04 72 54 48 - 4z 3fi ai 12 -F IIS 6 4 0 -0.6 0.2 - Wr a. o0ce Lj -0.19 0. oa a9 G_ Ob - I.Q 0.04 Ld - 1.5 0.01 0. Y 9 I uj r w 44 2 x T iC 0. 06 C. 04 CL X73 Lu 0. il32 GL 0.010 W I � cr ka a; i7_ G�GY0�02 Lo 1r 0 ME 11810 L29 04 72 54 48 - 4z 3fi ai 12 -F IIS 6 4 - 0,5 �- 0 -0.6 0.2 - Wr a. o0ce Lj -0.19 0. oa a9 G_ Ob - I.Q 0.04 r�. - 1.5 0.01 6 Y 9 I uj O. COC L 2 x T iC 0. 06 C. 04 CL X73 Lu 0. il32 0.010 ro I � 0.. 0,006 a; i7_ G�GY0�02 u 0.00 - 0,5 �- 0.4 -0.6 0.2 - Wr a. o0ce -0.19 0. oa a9 G_ Ob - I.Q 0.04 G. oz - 1.5 0.01 6 Y 9 I uj O. COC L 2 0, C04 Q. flGOQ 1 15 O. OCOG 06 Q 0. 0 00004 Ii COUNTY OF ROANOKE 9/22/15 7A-10 STORM DRAINS 0,001 a. o0ce 0, 0004 6 Y 9 I uj O. COC L T 0.00006 4, OW04 I � i7_ G�GY0�02 Q. flGOQ 1 15 O. OCOG 06 Q 0. 0 00004 Ii COUNTY OF ROANOKE 9/22/15 7A-10 STORM DRAINS STORM DRAINS 2, APPENDIX 7A NOMOGRAPH FOR COMPUTING REQUIRED SIZE OF CIRCULAR DRAIN FOR FULL FLOW - i 440 h X00 700 Fx�*m,llle - d+W,7 19'rsChOege 47. if C. {- ,I. aoo fri��r'�rr ��c�or- rr. C�.Q1'S sags/ope of Fr`r7 d dii?m0ei- l,5 7e e r " lochf of .3..5 ".Per secor7d. -300 byodlor+rrr? dhd lrr. ifl0 40�#I 2 l$�b .0001 IOd .0002 # C3 ,OQ32 4.i :0 ,GOci3 lil �� ,0*03 GQ Ln 72 y`� .10 0.06 .dCi04 y F W bb T F5 .01006 0[ 06 CL. 4 z 94 .[7010 $408 La Lt ' ;a} .00" c 4� 7Y ct 0020 8 3803 Z ,0$ �1 -0030 cr 30._0044 L- W t� 27 JJ600Ai760 0 24L � dl }1! LJ 06170 fL i 18 .1�41i 4A > 10 .0300 9200 15 La -GA00 ,0300 7 uj f 12 �/O� QyyEy1 79lKr iQ#$Li y 10700 0800 r 11 ,14 Gni 8 12 i3 3 Is 1.4 15 2 1 {i5 COUNTY OF ROANOKE 9/22/15 7A-11 STORM DRAINS STORM DRAINS APPENDIX 7A CONCRETE PIPE FLOW NOMOGRAPH .0001 r 1 8�U T SO �f Poo r— -00 � � �i 1 4n r ^ 72 Ali- 7+F 1 �.$ X42 - zoo i- 6 AM `} $o # # 2 .44 5 VJ - LL. 70 � 9 DOR DO e � Boo + � � : f'Q -50 M Goo tc2. ,* LJLI + F 1 C) t ' C 2 r �- C-) LU Q In- j i � .� 20 14 1 1 �_ IJ} 'i E ADO$ < C. 9 aoa a 5 c fli L= 45 G 25 SOLUTION, Proceed from Shy ieff, rfadfa - 2_I Cfr. _ y, F2oCafd St - -005 —d V 5.3 fps. Rend tib': 5L3 fps r +]n 11 L'45 Accard � rC 'IIA miry, a5 34 rrj COUNTY OF ROANOKE 9/22/15 7A-12 STORM DRAINS STORM DRAINS APPENDIX 7B INSTALLATION PROCEDURES FROM ROANOKE COUNTY Inspection Specifications for HDPE PIPE APPENDIX 7B COUNTY OF ROANOKE 7/1/14 7B-1 STORM DRAINS STORM DRAINS INSPECTION SFECIFICAnONS FOR HDPE PIPE TABLE OF CONTENTS I. ove-rview 11. Pre -Installation a. Trench Widths b. Dewatering IIT. Embedment a. Dealtlons b. Foundatioll Be�7d]'d'7a�1x�7g ,c1 , L 1.ii�Ly]Lld�fl�-d-y[J ea. �i'}}.fg. Initial Backfill f Final Backfill W. Joints V. Typical Details APPENDIX 711 COUNTY OF ROANOKE 7/1/14 7B-2 STORM DRAINS STORM DRAINS L OVERVIEW APPENDIX 7B 2 The County of Roanoke, in conjunction with the Virginia Department of Trmsportation, is allowing HDPE pipe for storm. sewers. HDPE pipe may be used for any size up to 48" in diameter. Anything above that must use previously approved pipe material. 11. PRE -INSTALLATION A. Trench Widths Trench widths used in installing HDPE pipe have been established in AASHI`O Section 30 and. ASTM D2321. Table 1 provides the recormnended trench widths for most installations to provide the. proper placement and compaction of backfill material in the haunches around the pipe. Trenching should be completed in the existing sails with sidewalls reasonably vertical to the top of the pipe. When excavation depths or soil conditions rewire sboring or use of a tre eb box, the bottom of the shoring or trench box should be placed no lower than the top of the pipe. This prevents disruption cif the backfill when sharing of trench box is removed. If this practice cannot be followed, considerations should be given to leaving the sho ing in place. Refer to Table 1. TABLE T -SUGGESTED MINIMUM Tf r�NGTI WIDTHS Nominal M a Diameter, (in) PIPe Op (in) Mirsirmm Trench Width (in) � 4 4.76 21 5 8.92 23 8 311 25 d '11.36 28 12 14.48 31 € 5 17.57 34 18 21.2 39 — - - - 24 27.8 48 39 35.1 66 36 41.7 75 42 473 83 4a f 52-7 89 COUNTY OF ROANOKE 7/1/14 7B-3 STORM DRAINS STORM DRAINS B. Dewatering APPENDIX 7B I-IDpE pipe will float in standing water. Therefore, it is imperative that the trench be dry when installing the pipe, Sump pumps, well points, or other methods may be needed to insure a db -y trench. 11L EMBE, DMIENx' 3 Embedment materials are those used for the foundation, bedding, haunching, and initial backfill. An illustration of this can be Bund in Figure l Page 5. A. Defuiitions 1. Class I — Angular cnshcd stone or rock o. 25 or 26 stone). 2. Mass TI — Clean, course grained materials, such as gravel, course sands, and gravel/sand mixtures. 3. Class HI — Course grained materials with fines including silty or clayey gravels or sands. Gravel or sand must comprise more than 50% of Class III materials. 4. Class rV and V materials are not rcconunended for enibedrrment materials. B. Foundation A. stable foundation must be }provided in order to insure proper installation. Unsuitable or unstable foimda.tions maybe replaced with a suitable bedding material, placed in G" lifts, COUNTY OF ROANOKE 7/1/14 713-4 STORM DRAINS STORM DRAINS C. Bedding APPENDIX 711 4 The middle of the bedding, equal to 1l3 of the pipe outside d anleteT, shoutd be loosely placed. The remaining stone for the bedding should be compacted to a minimurn 90% standard proctor density. Class I stone will be acceptable .telial for use, except when the fomdation is in soft, yielding, or otherwise unsuitable material. Then, the bedding material shall be #57 stone for the specified depth, and then capped with 4" of Class I stone. D. Haunching Haunching provides the pipe with its main support and strength. Extra care roust be taken in installing tht haunchi;ng. The haunching will extend Exom the bottom of1he pipe up to the spring line. For larger diarneter pipes (30"- 48"), embedment materials should be worked in by hand. Mass I stone may be used and compacted in "maximum lifts, compacted to 0% standard proctor density. E. Initial Backfill Initial Backfill will extend from the spring line to 12" above the top of the pipe. The backfill material shall consist of Class I stone, compacted in 6" lifts, compacted to 90% standard proctor density. F. Final Bacicfill Final back fill should be the same material as the proposed embankment, Generally, the excavated material will be used for the fmai backfill- The final bacicFdl is to be placed in 12" nkximum lifts,compacted to a rainirnum 85% standard proctor compaction. COUNTY OF ROANOKE 7/1/14 7B-5 STORM DRAINS STORM DRAINS Haunt Bar APPENDIX 711 Figure 1 Trench Cross Section Excavated Trench Width 5 Pipe Zane Haunch Zone COUNTY OF ROANOKE 7/1/14 713-6 STORM DRAINS STORM DRAINS APPENDIX 7B IV. JOINTS For watertight joints, an ASTM F-477 elastomeric rubber gasket shall be used at all joints of pipe. To install this gasket, the ends ofthe two pipes being connected shall be cleaned. The gasket shall be applied onto the bell with, the marling facing the coupler. Apply lubricant liberally to both joints of the pipes. Align the pipe to push it together on grade. Generally, pipe should be laid from the downstream end and working upstream. Small diameter pies (>24") can be pushed together by hand. Larger diameter pipes may need to use a bar or equipment to push the pipe together. If that is used, a wood black should he used to prevent any damage to the bell of'the pipe. Special care should be taken to ensure that no bedding material gets into the joints. Stone or any other material that gets into the joint may cause leaks. Rubber gaskets are normally installed at the factory. However, if pipe needs to be cut in the EeK the gasket shall be stretched over the bell prior to connecting pipes together. COUNTY OF ROANOKE 7/1/14 713-7 STORM DRAINS STORM DRAINS TYPICAL. DETAILS AND DOT TABLES AND DETAILS APPENDIX 7B COUNTY OF ROANOKE 7/1/14 7B-8 STORM DRAINS STORM DRAINS APPENDIX 7B u y. In COUNTY OF ROANOKE 7/1/14 7B-9 STORM DRAINS l L i a a� 14 � 8 as G yy{{ rig to T4 66 xg g $ W } 4 a ddd M2,11I a W MUG uo E�E--E- -11��C,1 J z`"� IsJ lsl ��y3$ar C 2 z r CSL' a� COUNTY OF ROANOKE 7/1/14 7B-9 STORM DRAINS STORM DRAINS APPENDIX 7B COUNTY OF ROANOKE 7/1/14 7B-10 STORM DRAINS STORM DRAINS he 4L(�j & Nay1 a 0. 54; �0z � �7 uC'rnc7ao4rcvmm�so n o sc no re�ry ow �n�nrrua�pp�� N� a ry NL�IryJ'71�j 'ng E2 120 �g7Q pg0Nn�i'�v'n'nw_g.1 �9��a N n, v � w pp MiE cdlnm 9 N 2,.t R�'] N v[b W G �NN LL f: QpC 7 O M 0`i�W V �_ e V ui N1App� he a 0. 54; Y �a �7 9- Z, U w (11 4 Q 1 V, W m O Qr m a�l 4 Q� Qk�wy W4v rLn2 Li� � ytN f�1 LIE 04 APPENDIX 7B V, ,a s - 9 COUNTY OF ROANOKE 7/1/14 7B-11 STORM DRAINS STORM DRAINS 2 0 C W LD w lu'w L CL W i 4r JiJF $— ho oGeemmL- J LU 6 Ali li] � • rp e a k7 rL � J S 13. 2 r 3� W Q¢ 4 O [If D� - w st- M + C) @K 2 0 e W LD w lu'w L CL W i 4r N $— ho J 6 Ali N '^' rr,+'] • rp e a k7 rL � J S 13. 2 r 3� tmi L CL W i J � J 6 cc k7 L) � S 13. 2 r 3� W LAJ 4 O st- @K 3 ��� vK o ww Zi N� b i 9 4 -Lii b a a G a A ti 1 U 4 APPENDIX 7B u rL-i L I L 1 V 9 V C Li 2 4 J � z E:0 CE L) Z) COUNTY OF ROANOKE 7/1/14 7B-12 STORM DRAINS L J � J 6 k7 N 5V � S 13. 3� W q� O st- @K 3 ��� vK o ww Zi N� b i 9 4 -Lii b a a G a A ti 1 V H4 �r W� W4 i x.67 r:" +x w ~ V7 S r W A3 K X a Zd'La f � W + -vt o �- N M iL N$ t ❑ J.f ww 7 �5t t � ![ l�e u rL-i L I L 1 V 9 V C Li 2 4 J � z E:0 CE L) Z) COUNTY OF ROANOKE 7/1/14 7B-12 STORM DRAINS STORM DRAINS APPENDIX 7B COUNTY OF ROANOKE 7/1/14 713-13 STORM DRAINS r-., - H IP, - II + �I� i f mLAE12�w v �oa� � � l 1 CSSd zp xp Iaa 0 F-etz- J , 5( S AY- 2J LJ atiLa doted I d L�! ' �- Z W � � � � � am ink moa v c��2 mDIE u, wo x ♦/� ���yy �LO1 V �� iv a '1 �. •� 'W'9cr3�ri en wLl I} � 1 #IN i ial , L. L4 of C N ti E 1:7La F �, Eli rn L v a r 8 uu ryS1+�f i s 'w 8 U 4e r� w m 1'z O "y 1� .l r� A. i'�4 "L yy OW W GLG �J ,�a��yw�.1� p L r 6.. (37 - 7 i _ TI r o �Y CL 0 d Ld E4 LLJ C) '/�lJil W � 'N%8 c2¢ '* O� e � �W 111 m � Z D4 �. � �. �'j � � �i Zig 7 41 y J w V) pnr� LL t� —FLL � F cs a� �erwr �yj F COUNTY OF ROANOKE 7/1/14 713-13 STORM DRAINS RESIDENTIAL LOT DRAINAGE Chapter 8 - Residential Lot Drainage CHAPTER 8 Residential lot drainage includes providing drainage and/or grading of the land to direct surface drainage away from building and toward streets, drainage conveyance structures, BMPs, or sheet flow. 8.1 References Except where more stringent requirements are presented in this Design Manual, lot drainage shall comply with state requirements. The primary design references are: • VDOT Drainage Manual • VA SWM Handbook • VA ESC Handbook • BMP Clearinghouse • State Building Code 8.2 General Lot Grading Lot grading plans establish the grading relationships between adjacent properties, determine the drainage areas and sizing of stormwater conveyance systems and BMPs, and account for the build out of the developed lot. 8.3 Construction Plan Requirements Individual lot grading and drainage shall be shown on the site plans and shall include the following information: • All high or low points shall be labeled on the plans. • All impervious areas shall be shown on the site plans. Additionally, all impervious areas shall be shown on the plot plans and shall not exceed the impervious areas shown on the approved site plans. Building pads sizes shall be noted on the site plans and the plot plans. If plot plans show an increase in the impervious areas then additional stormwater BMPs and a redesigned site plan may be required. Designers are encouraged to provide an adequate building pad on the site plans in order to meet homebuilders desired pad size and prevent redesign of the plans. COUNTY OF ROANOKE 9/22/15 8-1 RESIDENTIAL LOT DRAINAGE RESIDENTIAL LOT DRAINAGE CHAPTER 8 • Proposed and existing contours at two foot intervals. The proposed contours on plot plans shall conform with the intent of the approved site plan". • All stormwater conveyance structures (drainage pipes, swales, etc.) shall be shown on the plans. • All BMPs and swales shall be shown on the plans. • A finished floor elevation (FFE) shall be provided for each building pad on the site plan to the nearest foot. The plot plan shall show a FIFE that conforms to the approved site plan. See Section 12.2 for lots that are located in a floodplain. • Roof drains shall be shown on plot plans and shall meet the drainage areas as shown on the approved site plan. Rooftop disconnects used for stormwater quality shall be shown on the site plan. • Plot plans shall show that grading conforms to the approved site plan. If plot plans does not conform to the approved site plan then additional stormwater structures and a redesigned plan may be required. • Residential driveways shall meet VDOT specifications for driveways abutting a public roadway and Roanoke County's Street standards for driveways abutting a private roadway for maximum driveway grades. COUNTY OF ROANOKE 9/22/15 8-2 RESIDENTIAL LOT DRAINAGE RESIDENTIAL LOT DRAINAGE CHAPTER 8 COUNTY OF ROANOKE 9/22/15 8-3 RESIDENTIAL LOT DRAINAGE STORMWATER DETENTION Chapter 9 — Stormwater Detention CHAPTER 9 Stormwater detention facilities are a means of attenuating increases in peak flows caused by land development. In addition to providing flood control, stormwater detention facilities can protect downstream channels from increases in erosionThis chapter addresses general requirements for detention facilities as they relate to attenuating peak flows. When a storm event occurs, stormwater runoff enters the detention facility. The outlet structure allows a portion of the stormwater runoff to discharge from the facility and the remainder of the stormwater runoff is temporarily stored. After the end of the storm, water continues to discharge from the facility until it is empty. Stormwater detention facilities include: • Detention Basin • Retention Basin • Extended Detention Basin • Enhanced Extended Detention Basin • Underground Detention A detention basin is a pond that is normally dry. When a storm event occurs, it temporarily stores stormwater runoff, discharging it at a controlled rate through a hydraulic outlet structure to a downstream conveyance system. A retention basin is a stormwater pond which includes a permanent pool, even during non - rainfall periods. The pond includes storage above the normal pool elevation which temporarily stores stormwater runoff during storm events. An extended detention basin is a pond which temporarily stores runoff for a specific time period following a storm event, discharging it at a controlled rate through a hydraulic outlet structure to a downstream conveyance system. An extended detention basin is dry during non -rainfall periods. An extended detention basin provides more protection to the downstream channel from increases in erosion than a detention basin by releasing stored runoff at a lower rate over a longer time period. A typical plan and profile for an extended detention basin are detailed in the VABMP Clearinghouse. An enhanced extended detention basin is similar to an extended detention basin, but it also incorporates a shallow marsh in its bottom. An underground detention facility consists of pipes or manufactured underground chambers used to temporarily store stormwater runoff following a storm event, discharging it at a controlled rate through a hydraulic outlet structure to a downstream conveyance system. An underground detention facility is dry during non -rainfall periods. COUNTY OF ROANOKE 9/22/15 9-1 STORMWATER DETENTION STORMWATER DETENTION CHAPTER 9 In addition to detention and retention basins, the design requirements specified by this chapter and the VA BMP Clearinghouse shall apply to ponds created as private property amenity features. 9.1 References Except where more stringent requirements are presented in this Manual, the design and construction of stormwater detention facilities shall comply with VDOT and VA BMP Clearinghouse requirements. The primary design references are: • VA SWM Handbook • VDOT Drainage Manual • VA E&SC Handbook • VDOT Standards • VA BMP Clearinghouse 9.2 Design Methodology and Criteria 9.2.1 Hydrology See Chapter 4 for methodology used to determine design flows. 9.2.2 Design Flows and Storage Volumes To properly design stormwater detention facilities, a flow routing program shall be used with an appropriate elevation — discharge - storage relationship for the design storm events. 9.2.3 Minimum Contributing Drainage Area A stormwater retention basin, which contains a permanent pool, requires at least 10 acres of watershed drainage and/or a good source of base flow to maintain the permanent pool. A minimum drainage area of 20 acres shall be used when the basin is located in an area of high visibility to prevent unsightly drying of the permanent pool. Retention basins are best suited for regional and large drainage area projects. COUNTY OF ROANOKE 9/22/15 9-2 STORMWATER DETENTION STORNIWATER DETENTION CHAPTER 9 9.2.4 Detention Facility Locations Stormwater detention facilities should not be constructed within a Federal Emergency Management Agency (FEMA) designated 100 -year floodplain. If this is unavoidable, the facility shall comply with all applicable regulations under the National Flood Insurance Program, 44 CFR Part 59. The following factors shall be addressed when siting a stormwater detention facility: • Geotechnical conditions including soil conditions; • Groundwater levels and it's potential impacts; • Karst topography; • Existing and proposed utilities; • Aesthetics on surrounding properties; and • Environmental impacts including wetlands. Stormwater basins shall be located to minimize the aesthetic impacts to the surrounding property. Basins shall be set back from property lines a distance equal to the minimum width of the applicable required buffer yard. Locate stormwater detention facilities to avoid collecting significant amounts of drainage from offsite areas. Stormwater basins shall be set back at least fifty feet from a residential dwelling structure as measured from the wall of the structure to the top of the basin embankment. In proposed single family residential subdivisions, the stormwater management facility shall be located in a single non-developed lot. 9.2.5 Basin Grading Stormwater basins shall be graded to blend into the surrounding topography with the following conditions: • Basin side slopes shall be no greater than 3:1. Provisions shall be made for the long-term maintenance of basin slopes and periodic access for maintenance of the outlet structure, emergency spillway, and removal of accumulated sediments. COUNTY OF ROANOKE 9/22/15 9-3 STORMWATER DETENTION STORMWATER DETENTION CHAPTER 9 The maximum allowable depth of a stormwater detention basin shall be 15 feet, as measured from the top of the embankment to the lowest point in a basin. The bottom of the basin shall have a low flow or pilot channel to facilitate complete drainage. The pilot channel shall convey flows from a 2 year storm event and prevent standing water during dry -weather conditions. The pilot channel shall be sloped a minimum of 2% if it is a grass -lined channel and at a minimum of 1% if concrete -lined. In addition to the above requirements, the follow standards of practice should be used when designing a stormwater basin to the extent possible: The length -to -width ratio of a stormwater basin should be a minimum of 2:1. A 3:1 ratio is desired where possible. This prevents short-circuiting of the basin's storage areas. To minimize cut and fill, the long dimension of a stormwater basin should run parallel to the contours. 9.2.6 Embankments and Emergency Spillways Stormwater basin earthen embankments shall be designed and constructed to maintain structural integrity during the 100 -year frequency storm event. When applicable, Virginia Dam Safety regulations shall apply. The minimum top width of an embankment shall be 10 feet. Width may be greater based on the overall height. Embankment side slopes shall be no steeper than 3:1. Embankments with an emergency spillway must provide at least one foot of freeboard from the maximum 100 year storm water surface elevation to the top of the embankment. An embankment without an emergency spillway must provide at least two feet of freeboard from the maximum 100 year storm water surface elevation to the top of the embankment. A geotechnical study shall be required for all stormwater basins with constructed embankments greater than 6 feet in height as measured from the base of the embankment. The geotechnical study shall be performed by a licensed geotechnical engineer or licensed geologist and the report submitted to the County. COUNTY OF ROANOKE 9/22/15 9-4 STORMWATER DETENTION STORNIWATER DETENTION CHAPTER 9 9.2.7 Outlet Structures and Release Rates A. Stormwater Release Rates Stormwater detention facilities shall be designed with an outlet structure to control the release rate from stormwater being held in the facility. Design release rates shall meet the requirements set forth in Chapter 4, except that extended detention facilities shall be designed based on releasing the design storm runoff volume in a prescribed time as indicated in the VA BMP Clearinghouse. All stormwater detention facilities shall be empty within 72 hours following the storm event. Ponds created as private property amenity features, not being used as stormwater management, shall be exempt from release rate requirements. B. Outlet Structure Criteria Outlet structures generally include a principal spillway or outlet and an emergency overflow. An outlet structure may take the form of a drop inlet, pipe, weir, or orifice. The principal spillway or outlet is intended to release flow from the design storm events at the necessary controlled rate, without allowing flow to enter the emergency spillway or overflow. The sizing of the outlet structure shall be based on the results of the hydrologic routing calculations or model. Outlets from stormwater detention facilities shall be designed to function without manual, electrical, or mechanical controls. Where necessary, energy dissipaters shall be placed at the outfall to provide a non-erosive velocity from the facility to a channel. See Chapter 10 for the design of outfall protection. Where a stormwater basin with an earthen embankment does not have an emergency spillway, the principal outlet or spillway shall be sized to safely pass the flow from the 100 -year frequency storm without over topping the earthen embankment. In this instance, the design of the primary outlet structure shall include a 50% clogging factor during the 100 -year frequency storm as a safety factor. When the primary spillway is less than 24 inches wide, it shall be considered inoperative during a 100 - year frequency storm COUNTY OF ROANOKE 9/22/15 9-5 STORMWATER DETENTION STORMWATER DETENTION CHAPTER 9 Where a stormwater basin with an earthen embankment has an emergency spillway included, two conditions must be evaluated. The routed 100 -year WSEL must provide one foot of freeboard between the 100 -yr WSEL and the top of the berm. Secondly, the spillway must be evaluated to show that the 100 -year flow passes through the spillway without overtopping the berm. Both conditions must be evaluated and met. The ability to pass the 100 -year flow through the spillway is typically evaluated by routing the flow through the spillway only with all other outlets ignored or by simply evaluating the 100 -year flow through the dimensional equivalent weir using F1owMaster, similar software, or applicable weir equations. Where a stormwater basin with an earthen embankment does not have an emergency spillway included, two conditions must be evaluated. The routed 100 -year WSEL must provide two feet of freeboard between the 100 -year WSEL and the top of the berm. Secondly, the principal outlet or spillway (riser weir or culvert outlet) shall be sized to safely pass the 100 - year frequency storm without overtopping the berm. For this condition, the evaluation shall include a 50% clogging factor and is typically evaluated assuming a weir length (perimeter) or culvert (diameter) based on dimensions providing 50% of the design flow area. The principal spillway must be a minimum of 24 inches wide/diameter unless calculations show that the freeboard requirements and no overtopping conditions are met. For examples of design calculations of outlet structure orifices and weirs, see the VDOT Drainage Manual and VA BMP Clearinghouse. All riser structures shall be cast -in-place or precast concrete, unless a substitute material has been approved by the County. VDOT standards for riser structures may be found in the VDOT Standards. Outlet pipes shall be reinforced concrete pipe with rubber gasket watertight joints, shall have appropriate seepage control, and shall be installed on a concrete cradle from the tie of the pipe to the riser for the entire length of the outfall pipe. Concrete cradle shall be in accordance with the requirements of the VDOT Standards. C. Adequate Channel Outflows from stormwater detention facilities shall be discharged to an adequate channel. For adequate channel requirements, see Chapter 5. 9.2.8 Omitted COUNTY OF ROANOKE 9/22/15 9-6 STORMWATER DETENTION STORMWATER DETENTION 9.2.9 Landscaping CHAPTER 9 Stormwater basin embankments shall be vegetated. Selection and plant installation shall be in accordance with the standards of the VA BMP Clearinghouse. Trees and shrubs shall not be planted within a stormwater detention basin, nor on a stormwater basin berm, dam, or emergency spillway. The VA BMP Clearinghouse shall be utilized for guidance for landscaping in the marsh areas of enhanced extended detention basins. Native plants will be used to the maximum extent possible. 9.2.10 Underground Detention A. Materials All materials used in underground detention facilities shall be corrosion resistant consisting of reinforced concrete, aluminized corrugated metal pipe, corrugated high density polyethylene pipe, or similar approved material. B. Slope Underground detention facilities shall be sloped to drain at a minimum floor slope of 0.5 percent. C. Capacity Underground detention facilities shall be sized such that the 100 -year design storm may be routed through the facility with no damage to the surface property. D. Accessibility and Maintainability All underground detention facilities shall be designed to be readily accessible for periodic inspection and maintenance from the surface without the need to perform confined space entry. Providing pre-treatment to remove sediments before or at the entrance of the underground detention facility to improve water quality and/or improve maintainability should be considered during the design. COUNTY OF ROANOKE 9/22/15 9-7 STORMWATER DETENTION STORMWATER DETENTION 9.2.11 Trash Racks CHAPTER 9 Outlet structures shall be equipped with an appropriate trash rack. The trash rack shall be in accordance with the VA BMP Clearinghouse. 9.3 Environmental Impacts Environmental impacts shall be carefully considered when siting stormwater detention facilities. Siting basins in low lying areas with potentially environmentally sensitive areas requires careful consideration, coordination, approval, and permitting with local, state, and federal agencies to evaluate the suitability of constructing in these areas. Environmentally sensitive areas include, but are not limited to wetlands, shallow marshes, jurisdictional waters, natural watercourses, wildlife habitat, etc. and may be protected by state and/or federal laws. With careful planning, it may be possible to incorporate wetland mitigation into the basin design. Construction of stormwater basins or modifications to existing basins shall comply with all applicable laws and regulations. The applicant is responsible for procuring all necessary permits, such as US Army Corps of Engineers and Virginia DEQ Wetland Permits, Virginia DEQ VPDES Permits, VSMP Permits, etc., prior to beginning construction. Copies of all permits shall be provided to Roanoke County prior to a land disturbing permit being issued. See Chapter 12 for more information. Detention facilities shall be coordinated with a watershed or regional plan for managing stormwater runoff, if available. 9.4 Maintenance Requirements For the post -construction maintenance of stormwater detention facilities, see Chapter 14. COUNTY OF ROANOKE 9/22/15 9-8 STORMWATER DETENTION ENERGY DISSIPATION Chapter 10 - Energy Dissipation CHAPTER 10 Outlet protection for culverts, storm drains, BMP outlets, and steep open channels is essential to preventing erosion from damaging downstream channels and drainage structures. Erosion problems at culverts or at the outlet from detention basins are a common occurrence. Determination of the flow conditions, scour potential, and channel erosion resistance shall be standard procedure for all designs. Outlet protection can be a channel lining, structure, or flow barrier designed to lower excessive flow velocities and prevent erosion and scour. Outlet protection shall be employed whenever the velocity of flow at a pipe or open channel outlet exceeds the erosive velocity of the immediate downstream reach. Energy dissipation may take the form of the following: • Erosion control stone -lined channels; • Riprap outlet basins; or • Concrete baffled outlets. 10.1 References Except where more stringent requirements are presented in this Design Manual, energy dissipators shall comply with VDOT and other state requirements. The primary design references are the VDOT Drainage Manual and the VA E&SC Handbook. Other appropriate references include: • VDOT Standards • VA SWM Handbook • FHWA Design of Riprap Revetment HEC No. 11 (Pub. No. FHWA-IP-89-016 1989/2000) • FHWA Hydraulic Design of Energy Dissipators for Culverts and Channels HEC No. 14 (Pub. No. FHWA-EPD-86-110 Sept. 1983 & FHWA-IF-00-02 2000) • U.S. Dept. of the Interior — Bureau of Reclamation: Hydraulic Design of Stilling Basins and Energy Dissipators (Engineering Monograph No. 25) COUNTY OF ROANOKE 9/22/15 10-1 ENERGY DISSIPATION ENERGY DISSIPATION CHAPTER 10 • U.S. Dept. of the Interior — Bureau of Reclamation: Design of Small Canal Structures 10.2 Design Methodology and Criteria 10.2.1 Outlet Velocity Where the outlet velocity from culverts, storm drain outfalls, or open channels is high, and channel or pipe modifications cannot adequately reduce the velocity, energy dissipation may be necessary. See the VDOT Drainage Manual Sections 7.4.6 and 8.3.2 for methodologies to determine design outlet velocities from open channels, culverts, and storm drains. For the calculation of open channel velocity, see Chapter 5. For the calculation of exit velocity from culverts, see Chapter 6. For the calculation of exit velocity from storm drain pipes, see Chapter 7. 10.2.2 Erosion Control Stone The most common form of energy dissipation is the use of erosion control stone at the outlet. Protection is provided primarily by having sufficient length and flare to dissipate energy by expanding the flow. The outlet velocities are computed for the VDOT design discharge. Where a pipe discharges into a channel, the apron shall extend across the channel bottom and shall extend up the bank to a depth of one foot above the maximum tailwater depth from the design storm event. The dimensional requirements of the erosion control stone apron shall be determined using the graphical curves in the VA E&SC Handbook. Generally, the use of erosion control stone for energy dissipation is limited to a maximum velocity of 19 feet per second. Alternative means of energy dissipation shall be required where the discharge velocity is greater than 19 feet per second. Alternative means include riprap outlet basins or concrete baffled outlets. The use of alternative means of energy dissipation requires the approval of VDOT when located in a VDOT right-of-way. 10.2.3 Riprap Outlet Basins A riprap basin is a depressed area of riprap placed at the outlet of a high velocity culvert, storm drain outlet or open channel. The riprap reduces the exit velocity COUNTY OF ROANOKE 9/22/15 10-2 ENERGY DISSIPATION ENERGY DISSIPATION CHAPTER 10 by expanding the flow over the riprap length and width and forming a hydraulic jump. For the design of riprap basins, refer to the VDOT Drainage Manual. Dissipator geometry may also be computed using the "Energy Dissipator" module that is available in the computer program FHWA HY8, Culvert Analysis. Details of the riprap basin energy dissipator are included in Appendix 10A. 10.2.4 Baffled Outlets A baffled outlet usually consists of a concrete box structure with a vertical hanging concrete baffle and an end sill. Several variations of concrete baffled outlets have been published by VDOT and other state and local transportation and stormwater management agencies. A typical schematic of baffled outlets are shown in Appendix l OC. Baffled outlets are usually used when very high exit velocities exist at piped or channel transitions. Baffled outlets function by dissipating energy through impact of the water hitting the baffle and through the resulting turbulence. A tailwater depth is not required for adequate energy dissipation, but will help smooth the outlet flow. This type of outlet protection may be used with outlet velocities up to 50 feet per second. Baffled outlets are not included in state guidance handbooks. Hydraulic design procedures for baffled outlets may be found in the U.S. Department of Interior, Bureau of Reclamation, Design of Small Canal Structures, 1978 and are as follows: Step 1: Determine input parameters, including: H = Energy head to be dissipated, feet (can be approximated as the difference between channel invert elevations at the inlet and outlet). Where: Q = Design discharge, cubic feet/second v = Theoretical discharge velocity determined from 2 g H, feet/second A = Flow area, Q / v, feet2 d = Flow depth entering the basin, ft COUNTY OF ROANOKE 9/22/15 10-3 ENERGY DISSIPATION ENERGY DISSIPATION CHAPTER 10 Fr = Froude number = v / ( g d )0.5, dimensionless g = Gravitational constant = 32.2 feet/secon& Step 2: Calculate the minimum basin width, W, in feet, using the following equation: W / d = 2.88 (Fr)o.566 Where: W = minimum basin width, feet d = depth of incoming flow, feet Fr = Froude number = v / ( g d )0.5 The limits of the W/d ratio are from 3 to 10, which corresponds to Froude numbers 1 to 9. If the basin is much wider than W, flow will pass under the baffle and energy dissipation will not be effective. Step 3: Calculate other basin dimensions as a function of W, Refer to the Schematic of Baffled Outlet in Appendix l OCA for other dimensions as a function of W and to identify variables that are used below in other steps. Step 4: Calculate the required protection for the transition from the baffled outlet to the natural channel based on the outlet width. A riprap apron shall be added of width W, length W (or a 5 -foot minimum), and depth f (W/6). The side slopes shall be 1.5:1, and the median rock diameter shall be at least W/20. Step 5: Calculate the baffled outlet invert elevation based on the tailwater. The maximum distance between expected tailwater elevation and the invert should be b+f or some flow will go over the baffle with no energy dissipation. If the tailwater is known and fairly controlled, the baffled outlet invert should be a distance ( b / 2 ) + f below the calculated tailwater elevation. If tailwater is uncontrolled, the baffled outlet invert should be a distance f below the downstream channel invert. Step 6: Calculate the outlet pipe diameter entering the basin assuming a velocity of 12 fps flowing full. COUNTY OF ROANOKE 9/22/15 10-4 ENERGY DISSIPATION ENERGY DISSIPATION CHAPTER 10 Step 7: If the entrance pipe slopes steeply downward, the entrance pipe shall be turned horizontal for at least 3 feet before entering the baffled outlet. Step 8: If it is possible that both the upstream and downstream ends of the pipe will be submerged, provide an air vent approximately 1/6 of the pipe diameter near the upstream end to prevent pressure fluctuations and possible surging flow conditions. 10.2.5 Energy Dissipator for Paved Areas For energy dissipation from velocities from paved channels or flumes, use VDOT Standards. Schematics of energy dissipators for paved flumes has been included in Appendix l OC. 10.2.6 Additional Energy Dissipators For additional energy dissipators, refer to FHWA HEC No 14 entitled, Hydraulic Design of Energy Dissipators for Culverts and Channels. 10.3 Installation Requirements Energy dissipators shall be installed and constructed according to all applicable FHWA, VDOT, and other state requirements and recommendations. 10.4 Easements Where an energy dissipater will be owned by a public jurisdiction or agency, a drainage easement must encompass the entire energy dissipator, and provide an additional area 10 feet wide around the entire energy dissipator to provide for maintenance. 10.5 Environmental Impacts Construction or modifications to energy dissipation structures shall comply with all applicable laws and regulations. The applicant is responsible for procuring all necessary permits, such as US Army Corps of Engineers and VA DEQ Wetland Permits, etc. 10.6 Maintenance Requirements The permittee is responsible for maintenance of energy dissipation structures until construction is complete, including final clean up and site stabilization, to the satisfaction of the County. After the completion of construction, property owners or responsible parties are responsible for maintenance of all energy dissipation structures located in private easements. COUNTY OF ROANOKE 9/22/15 10-5 ENERGY DISSIPATION ENERGY DISSIPATION APPENDIX 10A AIDS FOR ENERGY DISSIPATION DESIGN FROM VDOT DRAINAGE MANUAL Figure 8E-1, Details of Riprap Basin Energy Dissipator Figure 8E-3, Riprap Basin Design Checklist APPENDIX 10A COUNTY OF ROANOKE 9/22/15 1OA-1 ENERGY DISSIPATION ENERGY DISSIPATION Chapter 8 - Culverts Appendix 8E-1 Energy Dissipation OISSIPATEIR PWL ✓!P C{P 7Oh4L1R 3 W, V"" '. �Wo- YAin W �+ FaP ❑F BERu NOTE A 00 r 6 .7 TOP OF RP'RRp � NpFE 9 Y. TW I r ^. 1 MQRlrei v- 1 id yp 0R+2n�,�., 2d" DR } AIIN. 2d ie DR 2a30 OR 1.5a 1-5d SECTION OPD �, Ey€41A A-7--� ppy IK �O1 f I @uct r <f APRar1 CuLYER' 1Y �.2ry C FtigR110NinL � �� � L �l D ACJ HALF PLAN �k NOTE 57 i i HRi4R+�L CHlNNEL RJT J-1.1 SEC.A-A APPENDIX l0A TOP OF MAYURAL CHANNEL THICKENED OR SLOPING TOE OPTIONk. CONSTRUCT 1= DOWNSTREAM CHANNEL DEORA.DATION 15 ANTICIPATED. nOTE 9 NOTE WG= DIAMETER FOR PIPE CULVERT W,= BARREL WIDTtt FOR BOX CULVERT W,= SPAN OF PIPE -ARCH CULVERT h� 2430 OR 1.54 ExCAVLTE TO TI -4S LINE. @ACXFILL WITH RIPRAP w SEC. C -C. 11 2 I 1,Sd�- BERM A$ REOLARDD BERM AS RECUIRED ib SUPPORT RIPRAP TO SUPPORT RR'RAP ?y57 OR 1.5d_ PEXCAVA71E TC Th -S LINE. 9Ad-0ILL WITH RIPRAP SEG. B -B SEC. D -D NOTE A IF EXIT VELOCITY or BASIN is SPECIF6Eb, EVTEND 3ASIN AS REDURIED TO 0STAIN SUFFICIENT CROSS-SECTIONAL AREA AT SECTION A -A SUCH THAT Q,,,/;CROSS SECTION AREA AT SEC. A -A) = SPECIFIED EXIT VELOCITY. NO -E B WARP UASIN TO CONFORM TC NATURAL STREAM CHANNEL. TCP OF RIPRAP IN FLOOR OF BASIN SHOULD BE AT THE SAME ELEVATION OR LOWER THAN NATURAL CHANNEL BOTTOM AT SEC. A -A_ Figure 8E-1. Details of Riprap Basin Energy Dissipator SE,4 of 13 VDOT Drainage Manual COUNTY OF ROANOKE 9/22/15 1OA-2 ENERGY DISSIPATION ENERGY DISSIPATION Chapter 8 - Culverts Appendix 8E-1 Energy Dissipation R1PRAP BASIN Project No. _ Designer _ Reviewer DESIGN VALUESI TRIAL I FINAL . (Figure 8112) 1 TRIAL Equi. Dep . de D,,,Id§ V. Froude No., Fr TAILWATER CHECK Tait.aier, TW Equivalent depth, dE TWId* IF 7WIdr 7 0.75. calk.0 ie dpfap do—c— uaiag Figure SE -4 D�a(dA,7ilr, APPENDIX 10A Date Date MOTE 5-,r- •�rrrr�-�Tr. N! �y BASIN DRIENSIONS I F•Err Paul length is the larger of_ 10ha 3W. Basin length ie the larger of: I Sht 4W. Approach Thicknm 3D. Basin Thickness i 20„ D(1W.\STREAhI RIPR-4P (Figure BE -4) LZ, L VLfv. V, D. W is 20 21 Figure 8E- 3. Riprap Basin Design Checklist SE -6 of !3 VDDT Drainage Manual COUNTY OF ROANOKE 9/22/15 10A-3 ENERGY DISSIPATION ENERGY DISSIPATION APPENDIX 10B AIDS FOR ENERGY DISSIPATION DESIGN FROM VDOT ROAD AND BRIDGE STANDARDS Standard 114.01, Stone for Erosion Control APPENDIX 10B COUNTY OF ROANOKE 9/22/15 1OB-1 ENERGY DISSIPATION ENERGY DISSIPATION APPENDIX IOB � x S Q W p M m �a 0 a z o`m 0 a x S C? L2 w 4J' a tv LLJ47-1+ ' Z �7 cn = y a s F x J -N 5.7 2�HPMZM �# �' a© O Nir U F - 4T E Z� a� C) Z b6 ifs ( a ELWLLI [J 4D V] VF J2 VY4 I.F{,j fb z IL 0 LL r X LLI �o 0 Li 0 4 W 7- 0 r LLI c� w .Mpp C7N 23"� COUNTY OF ROANOKE 9/22/15 1OB-2 ENERGY DISSIPATION ENERGY DISSIPATION APPENDIX IOC APPENDIX 10C ENERGY DISSIPATION DESIGN SCHEMATICS Schematics of Baffled Outlet, from US Bureau of Reclamation, Design of Small Canal Structures (as used by the State of Georgia and State of Colorado) Standard Energy Dissipator for Use with Paved Flume, from VDOT Road and Bridge Standards Precast Energy Dissipator, from VDOT Road and Bridge Standards Level Spreader from VA DCR Stormwater Specifications Various Energy Dissipators and Stilling Basins, from City of Knoxville, TN BMP Manual COUNTY OF ROANOKE 9/22/15 10C-1 ENERGY DISSIPATION ENERGY DISSIPATION VA DCR STORMWATER DESIGN SPECIFICATION NO. 2 APPENDIX IOC SHEET FLOW TO FILTER OR OPEN SPACE 1-31N- COURSE AGGREGATE z KEY LEVEL SPREADER OR OTHER LINING AS INTO EXISTING GRADE RIPRAP PLUNGE POOL RIPRAP APRON DIMENSION HASEL) UN 6° X 6" TREATED .j IJtAX TIMBERS OR 5% (Ml) OR LESS. IF VEGETATED FILTER STRIP OR CONSERVED CONCRETE LIP J LENGTH OF LEVEL SPREADER JA 0- LIP TO BE BASED ON DESIGN FLOW AND ALLOWABLE VELOCITY .7 '�%>✓i TOP OF LEVEL SPREADER SHALL BE FLAT 1-31N- COURSE AGGREGATE z OR OTHER LINING AS DESIGNED FOR STABILITY PLAN VIEW DIMENSION HASEL) UN UNDIGT MM=X NCGIIADE DESIGN DISCHARGE 5% (Ml) OR LESS. IF VEGETATED FILTER STRIP OR CONSERVED 2" MIN OPEN SPACE: FIRST 10 FEET LESS THAN 2% 3' MIN 10' MIN 3' MIN MIN. DEPTH BASED ON REOUIRrD STONE SIZE SECTION A -A° Figure 2.4: Level Spreader: Pipe or Channel Flow to Filter Strip or Preserved Open Apace Version 2.0, January 1, 2013 Page 8 of 21 COUNTY OF ROANOKE 9/22/15 1OC-2 ENERGY DISSIPATION ENERGY DISSIPATION -.. �..- L �• 4 Cj I ! EG_ A -A t IA PLAN APPENDIX IOC SECTION Rock diameter for P; ofecjion= 1/20(w) Figure 4.5-11 Schematic of Baffled Outlet 5aurc:,: U.,13. Dept- Df the Inlerinr,1878} 4.5-22 Gm.gio Siom)wolar h anagerrrent mai .-)ual Volume 2 (Technical Handbook) COUNTY OF ROANOKE 9/22/15 10C-3 ENERGY DISSIPATION Protection as required 1\.f1 r� 11++ d� W) SECTION Rock diameter for P; ofecjion= 1/20(w) Figure 4.5-11 Schematic of Baffled Outlet 5aurc:,: U.,13. Dept- Df the Inlerinr,1878} 4.5-22 Gm.gio Siom)wolar h anagerrrent mai .-)ual Volume 2 (Technical Handbook) COUNTY OF ROANOKE 9/22/15 10C-3 ENERGY DISSIPATION ENERGY DISSIPATION CDOT Drainage Design Manual IT I1 r tl n3E2 3�'sra II rl 1Vc1H I t I1 LI 'as —I I 11 -- LI 1 t l _JA =a h I PL 3 a I SEC. A A II WI MW. I 1 11 4.20 rn 1 Ww 11 I1 11 V,1H � 4 t{o. 1Q m 0-20 m` t L — PLAN SECTION STILLING BASIN QESIGN APPENDIX IOC Ehergy Dissipators M 1 TI 1 t t i Lp — k---(0.21) m MAX.) L I a 4 Drk 4RMN.I— PLAq b I � I P a} a q 3 � a m jf ®EDDING SECTION ALTERNATIVE END SILL Figure 11.7 USBR Type VI (Impact) Dissipator COUNTY OF ROANOKE 9/22/15 10C-4 ENERGY DISSIPATION ENERGY DISSIPATION Y c� m r7i # a Ox W FFQ w R W li v U j ? a W (,1 Wp{Y � � d • � yr ol yg1 pf ❑ CV^J 1 �� lL v493 m��"ir mcm .. gyp 6 "A ; ib01' Ma 22 9 C 9 :k%M ml L d—j APPENDIX 10C 4 r�t�5 i7N ° W n H m T r4D a Lnn r EWW C F U rn a N s COUNTY OF ROANOKE 9/22/15 lOC-5 ENERGY DISSIPATION n m r4D Lnn EWW C F U V7 c3i 90 n a a N c � (L Fn (n Ej V) J LL. 4 w �+ W z w LaLl E 2 3 i W �+ m m m m ED b � s COUNTY OF ROANOKE 9/22/15 lOC-5 ENERGY DISSIPATION ENERGY DISSIPATION APPENDIXIOC COUNTY OF ROANOKE 92Z&1 10 - ENERGY DISSIPATION a log. � § � A / §K� _ k ���� l K2 W - § a ■ - % oos? �%�k;•in e k § k §b § k ® a 55 ■ § ,..* � � ■ % W a, winw K§ ;z o � / W , +a 0414-a, k- � � IIAZ � co « 0 Q � ' w ■ , \ in ƒ �k . § K 0,L4 COUNTY OF ROANOKE 92Z&1 10 - ENERGY DISSIPATION ENERGY DISSIPATION APPENDIX IOC ACTIVITY: Outlet Protection ES - 25 Chute blocks (size and shape vary) – Baffle triers, optional , see nate I {size and shape vary) Sufficient depth for — hydrauliciump plus adequate freeboard End sill (maybe dentated) Typical Stilling Basin At End of Payed Flume or Chute culvert Concrete stilling basin (sce nate 2) Computed normal flow Baffles to slow water down without excessive head loss Tynical Stilling Basin Using Baffles. and Elevation Droy Stagger baffle blocks laterally 'ypical I'ncrEv Dissipator – Baffle Blocks Within Headwall Securely fasten CMP tee section with coupling bands or screws Support structure with sandbags or other materials tar prevent movement Temporary CMP Energy Dissiyator Notes: I. This is the basic format for several types of stilling hasins, USBR Type It basin does not contain baffle piers, but does have a dentated end sill. USER Type III basin has baffle piers and a smooth understated end sill. See HEC -14 for detailed desiga of conctete structures. 2. Concrete stilling basin should be approximately as wide as the downstream channel. Design baffles to retain sufficient stormwater to act as a plunge pool for a wide range of flow values. Relies on sufficient taihvater to halt flow velocity Typical impact Energy Dissipater fVirginia DOT] NOT TO SCALE Figure ES -25-2 Various Energy Dissipators and Stilling Basins COUNTY OF ROANOKE 9/22/15 1OC-7 ENERGY DISSIPATION (NOT USED) Chapter 11 — (NOT USED) COUNTY OF ROANOKE 9/22/15 CHAPTER 11 (NOT USED) ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A Chapter 12 - Environmentally Sensitive Areas Stormwater discharges to areas with features identified as environmentally sensitive may be subject to additional requirements, or may need to utilize or restrict certain stormwater management practices. The following type of areas are considered to be "environmentally sensitive": • Floodplains —Areas identified within a 100 -year recurrence interval flood plain. • Steep Slopes — Areas with a slope of 33 percent or greater. • Stream Buffers — Setbacks and vegetative buffers established adjacent to the Roanoke River as required by the County of Roanoke zoning ordinance or designated conservation area buffer zones at each bank of streams, ponds, lakes, wetlands, and stormwater BMPs. • Critical Erosion Areas — Areas with potential serious erosion problems as defined in the VA E&SC Handbook. These fall into two sub categories. o The erosion hazard is critical if the slope length exceeds the following criteria: 0-7% slope > 300 feet 7-15% slope > 150 feet >15% slope > 75 feet o Areas may be critical if the soils are highly erodible, as classified using the United States Department of Agriculture (USDA) Natural Resources Conservation Service (formerly Soil Conservation Service) methods, either Land Capability Classification IIIe, We, IV, VII, or VIII or with an erodibility index factor greater than 8. Karst Geology — Areas where the underlying geologic conditions include caves and crevices which allow stormwater to infiltrate and quickly migrate and transport potential pollutants. • Hot Spots — Areas where a high potential for stormwater pollution may occur due to current or former activity on the site. • Jurisdictional Streams and/or Water — Waters regulated by U.S. Army Corps of Engineers (USACE) under Section 404 of the Clean Water Act. A jurisdictional determination (JD) is required that identifies and separates the Corps regulated areas from non-regulated areas. Disturbance in regulated areas requires a permit form USACE. JDs are typically good for 5 years after the determination has been made by COUNTY OF ROANOKE 9/22/15 12-1 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A the USACE. Third party reports by qualified professionals will be accepted for jurisdictional stream delineation. Wetlands- Wetlands regulated by U.S. Army Corps of Engineers (USACE) under Section 404 of the Clean Water Act. A jurisdictional determination (JD) is required that identifies and delineates wetlands. Disturbance in wetlands requires a permit form USACE. JDs are typically good for 5 years after the determination has been made by the USACE. Third party reports by qualified professionals will be accepted for wetland delineation. 12.1 References The following publications may be useful in providing guidance when performing construction, establishing development limits, and developing appropriate strategies and design features to address the special concerns related to environmentally sensitive areas: • VDOT Drainage Manual • VA E&SC Handbook • VA SWM Handbook • Virginia Department of Conservation and Recreation, Technical Bulletin No. 2, Hydrologic Modeling and Design in Karst • International Building Code • The Development of the Land Capability Classification (reprinted from Readings in the History of the Soil Conservation Service), Douglas Helms, Soil Conservation Service, 1992 • Clean Water Act Section 404 • River & Harbors Act of 1899 Section 10 • FEMA Flood Map Service Center • Flood Insurance Rate Map (FIRM) COUNTY OF ROANOKE 9/22/15 12-2 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A 12.2 Floodplains The purpose of floodplain management is to regulate the use of the floodplains in order to protect life and property, prevent sedimentation and pollution of water resources, and to prevent or protect against the general degradation of the environment. Floodplains and their regulatory requirements are generally based on the stream flows generated by a 100 -year frequency storm and existing land development conditions. However, storms and future land development can generate flows of greater magnitude and flooding above and beyond these limits. For this reason, additional vertical and horizontal setbacks from the floodplain limits are strongly encouraged to account for future development within the upstream drainage area and to serve as a factor of safety for larger flood events. Floodplains include: Areas identified within a 100 -year recurrence interval floodplain as identified by the Federal Emergency Management Agency (FEMA). These areas have been identified as the Floodplain Overlay District by the County of Roanoke Zoning Ordinance. Areas identified within a 100 -year interval floodplain as identified by an applicant floodplain study. Management of floodplains in Roanoke County shall be in accordance with the requirements published in the County of Roanoke Zoning Ordinance. Under no conditions, shall the land disturbance activity adversely affect the capacity of channels, floodways, ditches, or any drainage facility or system. The lowest floor elevation of any new residential structure, as defined in the County of Roanoke Zoning Ordinance Section 30-28, shall be at least 2 feet above the base flood elevation. The lowest floor elevation of any new non-residential structure shall be at least 1 foot above the base flood elevation unless the structure is floodproofed. The elevation of the lowest floor shall be certified by a Registered Surveyor or Professional Engineer on an Elevation Certificate after the lowest floor is installed. Grading and cut and fill operations within the 100 -year flood plain are discouraged and must be approved by the County of Roanoke. Activity within the floodplain must also be coordinated with other regulatory requirements and agencies. These may include erosion and sediment control, stream buffer protection, FEMA, VMRC, U.S. Army Corps of Engineers, Virginia DEQ, and others. COUNTY OF ROANOKE 9/22/15 12-3 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A Construction of stormwater management impoundment structures within a floodplain shall be avoided to the extent possible. Where this is unavoidable, all stormwater management facility construction shall be in compliance with all applicable regulations under the National Flood Insurance Program, 44 CFR Part 59, and in accordance with the County of Roanoke Zoning Ordinance. The County does not have the authority to alter or modify the flood limits and/or elevations established by FEMA. Should an applicant flood study indicate any alteration in FEMA's limits and/or elevations, then the applicant must contact FEMA and obtain a map revision. 12.2.1 Applicant Flood Study Requirements A flood study, prepared by a Professional Engineer, must be prepared and submitted, by the applicant, for all areas where the drainage area is 100 acres or greater, and there are no detailed flood profiles or elevations from a FEMA Flood Insurance Study. There are two levels of studies. A detail study is required, if any development is proposed within the floodplain. Development includes grading and road crossings. A limited detail study is acceptable, if no development is proposed within the floodplain and the purpose of the study is to avoid the floodplain. A detail study involves a rigorous detailed hydrologic and hydraulic study of a flooding source reach. The typical riverine detail study includes the following minimum steps: • Field survey of stream and floodplain cross-sections • Field survey of all hydraulic structure crossings. • Collection of historical high water mark elevations and model calibration/verification, if data is available. • Detailed hydrologic & hydraulic modeling/computations • Establishment of the FEMA regulatory Floodway • Other tasks meeting all FEMA Guidelines and Specifications for Flood Hazard Mapping Partners A limited detail study may be performed when development is to occur adjacent to, but not in the existing floodplain. In most limited detail modeling, local regional regression equations along with a HEC -RAS hydraulic model will be developed. The major difference between the HEC -RAS models for the limited detail study and the detail study will be the amount of field survey information collected in the field and used to create the model and the amount of time spent on calibration to historical flood elevations. The limited detail models typically include no field survey data, and floodways are typically not computed. The COUNTY OF ROANOKE 9/22/15 12-4 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A methods for limited detail study are further outlined in the FEMA Guidelines and Specifications for Flood Hazard Mapping Partners In addition, the following information and items are required when an applicant flood study is submitted to Roanoke County for review: • The flood study shall be based on the ultimate land use conditions as published in the most recent Comprehensive Plan for upstream areas. Structure locations shall be based on the ultimate build out data. • The flood study shall be prepared by a registered Professional Engineer licensed to practice engineering in Virginia, sealed, signed, and dated. • Assuming that sedimentation or scour may occur during the storm event is not acceptable. • The flood study shall compare pre- and post -development conditions to verify that the proposed development will not increase the 100 year flood elevation more than 1 foot at any point. • The flood study shall consider backwater conditions, local obstructions and, where required by the County of Roanoke Department of Community Development, the partial or complete failure of any enclosed drainage system. Consideration must be given to the overflow path, to ensure that no structures will flood in the event of system failure. The flood study shall analyze the 100 -year flood path for all new development. A digital version of the 100 -year flood limits and cross sections must be provided to the County. The study and supporting data will become public information. The site plan digital file shall be in ACAD format and tied to the correct State Plane Coordinate. Cross sections from the study must be indicated on the site plans submitted as a part of the development review package. 12.2.2 Floodplain Delineation The limits of floodplain floodways shall be staked and flagged in the field prior to any land disturbance activities and they shall remain undisturbed during construction. After the completion of construction, the limits of floodplain floodways shall be checked to verify that no unauthorized filling has taken place in the floodway. The limits shall be shown on the plan and labeled with a point number and either a northing and easting or latitude and longitude points. COUNTY OF ROANOKE 9/22/15 12-5 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A Place floodplain limits and floodways on the final plats submitted for each property. All subdivision plats and site plans located within the floodplain in whole or in part shall include base flood elevation data. 12.3 Steep Slopes Special precautions and guidelines are required for development in areas having steep slopes, defined as thirty-three and one third percent (33.3%) or greater. These precautions and guidelines address the increased potential for soil erosion, sedimentation, water pollution and septic disposal problems associated with the development of areas with significant topographical relief. Unrestricted development of steep slopes may result in: • Rapid and/or large-scale movement of soil and rock; • Rapid and excessive stormwater run-off; • Deposition of eroded material leading to siltation of natural and man-made bodies of water; • Loss of aesthetic resource; and • Greater travel distance of septic effluent in the event of septic system failure. 12.3.1 Development Restrictions Land -disturbing activities on steep slopes are regulated by Chapter 8.1 of the County Code, "Erosion and Sediment Control and Steep Slope Development Ordinance of the County of Roanoke, Virginia." If the grade of a site is greater than 33.3%, refer to the International Building Code for steep slope development requirements. 12.3.2 Design Standards No land disturbance of steep slopes may occur without a geotechnical study that concludes that the land disturbance will result in a stable finished slope. For the requirements of a geotechnical study, see County of Roanoke Erosion and Sediment Control and Steep Slope Ordinance. Land disturbance of steep slopes require the preparation and submittal to the County of as -built plans showing that the finished geometry is in substantial conformity with the approved site plan. COUNTY OF ROANOKE 9/22/15 12-6 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A Site grading and measures required to control stormwater runoff shall collect and carry storm drainage away from the steep slope to the extent possible. If concentrated runoff is to be discharged in areas of steep slopes, adequate protection must be installed to prevent channel erosion and energy dissipation shall be used at the base of the steep slope to prevent erosion where the flow transitions to a shallower slope. The use of a closed conduit storm drain should be considered in accordance with Chapter 7. 12.4 Stream Buffers Stream buffers are established to provide a naturally vegetated strip of land adjacent to a stream. This buffer protects the stream from encroachment by development, preserves the water, recreational, and environmental resources, protects the floodplain and floodway, retards runoff, and helps improve the water quality of stream by preventing erosion and filtering non -point source pollution from runoff. The establishment of stream buffers as a water quality measure is encouraged by the County of Roanoke. Requirements for stream buffers shall be in accordance with Section 30-75 of the County of Roanoke Zoning Ordinance- Roanoke River Conservation and Overlay District. Additionally, the development must meet the required stream setbacks as outlined in Section 30-75-5. 12.5 Critical Erosion Areas Critical erosion areas, if cleared of vegetation and exposed to the elements of nature, may experience significant erosion and sedimentation problems, including a significant loss of topsoil. These soils tend to be located on hillsides and areas with steep slopes, and adjacent to river valleys and tributaries. Critical erosion areas include: • The erosion hazard is critical if the slope length exceeds the following criteria: 0-7% slope > 300 feet 7-15% slope > 150 feet >15% slope > 75 feet Critical erosion areas shall be indicated on the Erosion and Sediment Control Plan. To the extent feasible, disturbance of critical erosion areas shall be avoided or minimized. Where critical erosion areas are disturbed, their protection and stabilization shall specifically be addressed by the Erosion and Sediment Control Plan and the Stormwater Management Plan. COUNTY OF ROANOKE 9/22/15 12-7 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A 12.6 Karst Geology Developers and Designers are cautioned that construction in karst geology requires special care and study; and that they are responsible to ensure that all appropriate investigations are performed by licensed geotechnical engineers or geologists to ensure long-term soil stability for proposed buildings and site improvements. Although proper study of site conditions is the responsibility of the Developer and Designer, Roanoke County may, at its discretion, require a geotechnical investigation, prepared by a licensed geotechnical engineer or geologist, on a case by case basis. Karst is an underlying geology which is common in Roanoke County where the underlying rock is predominantly soluble limestone or dolomite creating caves, crevices, and other cavities in the rock. Stormwater may infiltrate to the karst geologic rock and quickly drain through the open cavities. In addition to providing a quick transport mechanism for potential stormwater pollutants, this may create quick erosion of the limestone, potentially causing sinkholes or other surface sloughing. Identification of karst geology shall be based on local geology and soils maps, aerial photography, and site visits by a person familiar with karst geology. Karst areas present problems with conventional hydrologic stormwater models, creating poor representation of runoff rates as most models do not have allowances for losses through sinkholes, crevices, or caves. See DCR Technical Bulletin #2, Hydrologic Modeling and Design in Karst for additional information on identification, and modeling requirements for areas in karst geology. Recommended practices include: • Design the site to take maximum advantage of topography. • Minimize site disturbance, cuts, fills, and drainage alterations. • Minimize the impervious surface. • Stormwater conveyance structures shall be designed to dissipate overland flow over the largest areas possible. Avoid concentration of flows and ponding. • Stormwater management facilities located in karst areas shall be installed with a liner. Only BMP structures approved for karst areas by the VA BMP Clearinghouse will be allowed for installation. 12.7 Stormwater Hot Spots Stormwater discharges from land uses or activities with higher potential pollutant loadings, known as "hotspots", may require a greater level of stormwater treatment or the use of specific structural BMPs and pollution prevention practices. Greater COUNTY OF ROANOKE 9/22/15 12-8 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A concentrations of sediment, hydrocarbons, traces metals, pesticides, and other toxics than are found in typical stormwater runoff may qualify a site for designation as a hot spot. The following land uses and activities may be stormwater hotspots: 1. Vehicle salvage yards and recycling facilities; 2. Vehicle fueling stations; 3. Vehicle service and maintenance facilities; 4. Vehicle and equipment cleaning facilities; 5. Fleet storage areas (bus, truck, etc); 6. Industrial sites (for SIC codes contact VA DEQ); 7. Marinas (service and maintenance areas); 8. Outdoor liquid container storage; 9. Outdoor loading and unloading facilities; 10. Public works storage areas; 11. Facilities that generate or store hazardous materials; 12. Commercial container nursery; 13. Golf courses; 14. Chemical storage; and 15. Dry cleaning operations. 12.7.1 Design Restrictions Stormwater BMP practices having an infiltration component located in stormwater hotspot areas shall be provided with adequate pretreatment or storage areas to preclude pollutants from the infiltration area. The property owner must conform with all applicable laws and regulations relevant to any chemicals or hazardous materials used on these sites. Industrial operations shall be conducted to minimize exposure of chemical storage COUNTY OF ROANOKE 9/22/15 12-9 ENVIRONMENTALLY SENSITIVE AREAS ENVIRONMENTALLY SENSITIVE AREAS CHAPTER 12A containers to stormwater, and contain any runoff as required by law where this can not be avoided. These sites must also meet DEQ VSMP and DEQ VPDES permit requirements, where applicable. 12.7.2 Golf Course Development Golf courses, while maintaining impervious area and natural buffers allow for the introduction of nutrients into stormwater through fertilizers and chemicals into stormwater through the use of pesticides and herbicides. Design of golf courses, public or private, should meet the following performance standards: Managed turf should be reduced by including areas of rough devoted to native plants, natural environments, and wildlife habitat enhancement; 2. An Integrated Pest Management and nutrient management plan should be prepared and followed; 3. Native or naturalized landscaping should be used to the extent possible; 4. Natural vegetation and trees along streams should be retained to the extend possible; 5. Stream crossings should be minimized; 6. Irrigation, drainage and retention systems should be designed to provide for efficient use of water and the protection of water quality; 7. Water reuse strategies should be employed when feasible; 8. Adherence to the "Environmental Principles of Golf Courses in the United States" published by the Center for Resource Management is encouraged. 9. A Nutrient Management Plan should be developed by a certified Nutrient Management Planner consistent with DCR's Nutrient Management Training and Certification Regulations. COUNTY OF ROANOKE 9/22/15 12-10 ENVIRONMENTALLY SENSITIVE AREAS GEOTECHNICAL STUDIES Chapter 13 - Geotechnical Studies (RESERVED) COUNTY OF ROANOKE 9/22/15 13-1 CHAPTER 13 GEOTECHNICAL STUDIES MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 Chapter 14 - Maintenance of Stormwater Management Facilities Proper maintenance of stormwater management facilities is essential to ensure proper long-term operation of these systems. Possible problems which may develop without proper maintenance include: • Stormwater structures may become clogged with debris reducing flow capacity which may cause upstream flooding; • Stormwater storage facilities may fill with sediment or debris reducing storage capacity and diminishing the ability of the facility to lower storm flows which may result in flooding downstream; • BMPs may not remove pollutants at the design levels required to meet the water quality requirements. If vegetation is not periodically cut and removed, it may release nutrients back into the environment, negating their water quality benefit. Stormwater management facilities include detention and retention basins, bioretention, grassed swales, and other BMPs that are intended to control stormwater runoff and change the characteristics of that runoff including, but not limited to, the quantity and quality, the period of release or the velocity of flow. Stormwater management facilities also include pipes and open channels, where the pipes and open channels are integral parts of the BMP (e.g. the pipes in a detention basin that convey flow from the outlet structure through an embankment to the discharge), and where the pipes and open channels are being used as BMPs to store or treat stormwater. Pipes (culverts and storm drains) and open channels that do not store or treat stormwater and are not an integral part of a BMP are storm drainage systems and not stormwater management facilities. Maintenance of stormwater management facilities are addressed in this Chapter. Maintenance of culverts, storm drains, and open channels that are not stormwater management facilities are addressed in their respective chapters. The maintenance guidance provided in this chapter is the routine maintenance that should be anticipated for typical nonproprietary BMPs; however, it is not meant to be all-inclusive. It is the applicant's responsibility to provide a project specific maintenance plan and schedule as part of the maintenance agreement. Information on BMP maintenance may also be found in the Manufacturer's literature. COUNTY OF ROANOKE 9/22/15 14-1 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.1 Responsibility for Maintenance Maintenance of stormwater management facilities is the responsibility of the permittee during construction until all work is completed, including final clean up and site stabilization, to the satisfaction of the County. At the completion of construction, maintenance of stormwater management facilities becomes the responsible party or land owner's responsibility in accordance with the executed Maintenance Agreement. The County is not responsible for maintaining private stormwater management facilities. 14.2 Maintenance Agreements A legally binding maintenance agreement specifying the parties responsible for the proper maintenance of all stormwater management facilities shall be secured prior to issuance of any permits for land disturbance activities. Responsibility for the operation and maintenance of stormwater management facilities, after the completion of construction, shall remain with the responsible party or property owner and shall legally pass to any successor or owner. The maintenance agreement shall include a project specific appendix that lists all stormwater management facilities present on the property; the minimum frequency of inspections and maintenance, and the routine maintenance that is to be performed for each stormwater management facility. The project specific appendix to the maintenance agreement is to be prepared by the applicant and submitted to the County with the Stormwater Management Plan for review. The information contained within the VA SWM Handbook, the VA BMP Clearinghouse, and Manufacturer literature shall be used, by the applicant, as a guide in preparing the project specific appendix to the maintenance agreement; however, the maintenance requirements shall be written to be specific to the project. When landscaping is a component of the stormwater management facility, a project specific maintenance schedule for the landscaping shall be provided that is reflective of the plant species that are used. The landscaping maintenance schedule shall contain guidance regarding methods, frequency, and time of year for landscape maintenance. The maintenance requirements shall stress the need to remove cut and remove vegetation from the BMP and the specific rate and method of fertilization, if any. A sample Maintenance Agreement is included on Roanoke County's website In addition, the applicant shall also establish easements for stormwater management facilities to grant the County the right of access for periodic inspections as described in Chapters 3 and 15. COUNTY OF ROANOKE 9/22/15 14-2 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3 Maintenance Program A consistent maintenance program is the best way to ensure that stormwater management facilities will continue to perform their necessary functions. The following components are common to many stormwater management facilities maintenance programs and shall be followed, where applicable. • Regular Inspections Scheduled inspections and additional inspections after major storm events are necessary to understand the condition of the stormwater management facility and discover deficiencies so that they may be corrected. • Vegetation Management Most stormwater management facilities rely on vegetation to filter sediment from stormwater and to stabilize the ground surface of the BMP. o Mowing Some stormwater management facilities may have no mow zones. Do not mow areas meant to stay natural. If mowing is allowed and desired, most grasses are hardiest if maintained as an upland meadow, with a blade height of 6 to 8 inches. If a shorter lawn is desired, additional lawn care will be needed to maintain turf health. Never cut grasses below a blade height of 4 inches. Grasses on embankments should be cut at least twice in the spring growing season, once in the summer, and twice in the fall growing season. Grass clippings should be collected, removed from the BMP, and disposed of properly. Ideally grass clippings should be composted and used as fertilizer or mulch in an upland area. Grass clippings must never be dumped into streams, open channels, storm drains, ponds, or stormwater management facilities as they will release nutrients as they decay which will flow into streams. o Fertilization One of the primary purposes of most stormwater management facilities is to remove nutrients from stormwater; therefore, it is important to not over fertilize. Often fertilization is not required, especially if grass is maintained at a height of 6 to 8 inches. Only fertilize where necessary to maintain the health of vegetation and then take care to apply only the minimum that is required. o Pest and Weed Control Avoid unnecessary pesticide and herbicide use. When absolutely required, use pesticides and herbicides in accordance with listed instructions and COUNTY OF ROANOKE 9/22/15 14-3 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 never allow spray to enter water as many of these chemicals are toxic to aquatic life in small concentrations. o Removing Accumulated Sediment Vegetation surrounding stormwater management facilities is designed to trap sediment; therefore, vegetation is likely to become laden with sediment and bare spots may emerge. Bare spots should be raked, backfilled if needed, and covered with top soil. Disturbed areas should be reseeded and mulched. Excess material should be removed and may be used as a mulch or soil supplement. If the soil becomes compacted, then aeration may be necessary. o Unwanted Vegetation Embankments must be kept clear of woody plants (trees and bushes) because their roots could cause seepage or slope failure. Consistent mowing should control any unwanted vegetation. • Slope, Embankment and Outlet Stabilization Stable slopes and embankments are necessary to ensure that erosion does not add to water quality problems and that embankments do not breach. Maintaining a health stand of grasses on slopes and embankments and preventing the grown of deep rooted (trees and shrubs) vegetation on embankment areas are important. Animal burrows can also cause deterioration to embankments. Animal burrows should be filled in as soon as they are discovered. In some cases animal control may be needed to avoid excessive burrows. Outlet structures are particularly vulnerable to undercutting and erosion. A small problem, if it is not corrected, may quickly result in the need to replace an entire structure. Consult a professional engineer if sink holes, cracking, wet areas around the outlet pipe, pipe displacement, or rusting of the pipe is observed. • Debris and Litter Control Regular debris and litter removal will reduce the chance of clogging outlet structures, prevent damage to vegetated areas, reduce mosquito breeding habitats, improve site appearance, and reduce conditions for excessive algae growth. • Mechanical Components Some stormwater management facilities have mechanical components including valves, sluice gates, anti -vortex devices, fence gates, locks, and access hatches that require periodic maintenance. • Trisect Control The simplest way to control insects, particularly mosquitoes, is to avoid stagnant water. Most stormwater management facilities are designed to be dry within a short time after a rain event. If an insect problem develops in a detention basin or COUNTY OF ROANOKE 9/22/15 14-4 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 infiltration facility, then there is a maintenance issue that needs to be corrected. In stormwater management facilities, such as retention basins, that are designed to have a permanent pool of water insects may be controlled by the prompt removal of floatable debris and perhaps by introducing and maintaining a fish population. • Access Road and Area Maintenance Most stormwater management facilities are designed to be accessible by heavy machinery for maintenance and repairs. Access should be maintained by periodic removal of woody vegetation and upkeep of gravel areas. • Sediment and Pollutant Removal The primary purpose of many stormwater management facilities is the removal of sediments and nutrients (which are often attached to sediments). Sediment will naturally accumulate in a stormwater management facilities and must be periodically removed. The frequency of sediment removal will vary widely depending on the stormwater management facility's type and character of the contributing watershed. Removed sediments and pollutants should be properly disposed of in an upland area. They should be stabilized with vegetation so that they are not eroded by rainfall. Once sediment is removed, the stormwater management facility should be quickly restabilized, usually with vegetation. If maintenance operations disturb more than 5,000 square feet, an erosion and sediment control permit will be required before commencing work. Sediment and pollutant removal will usually take heavy equipment and is beyond the capabilities of most property owners without the assistance of appropriate contractors. • Component Repair or Replacement Eventually, like all infrastructure, stormwater management facilities' components will need to be repaired or replaced. Components may include inflow and outflow devices, trash racks and anti -vortex devices, valves, orifices, pipes, concrete structures, filter or infiltration media, earthworks such as embankments and side slopes Following completion of construction, routine maintenance shall be performed on stormwater management facilities as required and as specified in the Maintenance Agreement. If the County becomes aware that a stormwater management facility has not been adequately maintained, is not functioning properly, or has becomes a danger to public safety, public health, or the environment, the responsible party will be notified in writing. The responsible party shall then be required to address the deficiency issue within a reasonable time as identified in the written notice. Failure to address the deficiency issue may result in enforcement actions. COUNTY OF ROANOKE 9/22/15 14-5 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.1 Earthen Embankments Earthen embankments are an integral part of many BMPs including detention and retention basins and constructed wetlands. For Earthen Embankments maintenance guidance, see Table 14.1. Table 14.1 Earthen Embankments Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect earthen embankments for signs of settlement, Annually seepage, woody vegetation growth, animal burrows, and good ground cover. Vegetation Objective is to maintain a healthy grass cover free of Mow grass on Management trees and brush embankments at least • Mow grass on embankments to a height of 6 to 8 twice during both inches. growing seasons and • Remove all trees and brush from embankment and once during the at least 25' beyond embankment. When removing summer. trees and brush, extract as much of the root as possible. • Fertilize, lime, or treat with pesticide or herbicide when needed to maintain grass health (do not over fertilize). • Reseed embankments as necessary to maintain vegetation. • Avoid over -fertilization. Slope, Embankment, . Fill animal burrows with compacted fill. As needed based on and Outlet • Regrade, repair, and revegetate eroded damage observed Stabilization embankments. during routine • If there are signs of seepage or embankment maintenance or slumps consult with a professional engineer. inspections Debris and Litter Keep the embankment clear of debris and litter During inspections or Control mowing Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Remove woody plants and maintain surface in drivable Annually Area Maintenance condition Sediment and Not applicable Not applicable Pollutant Removal Component Repair Replace embankments that have major erosion, seepage, Infrequent and Replacement or slumping problems. Consult with a professional engineer. COUNTY OF ROANOKE 9/22/15 14-6 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.2 Principal Spillways Principal Spillways are an integral part of many BMPs including detention and retention basins and constructed wetlands. Principal spillways normally consist of an outlet structure, pipe through an embankment, and outlet discharging to a downstream open channel. For guidance for the maintenance of Principal Spillways, see Table 14.2. Table 14.2 Principal Spillways Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect outlet structure for signs of cracks, spalling, Semiannually and after broken or loose sections, or leakage, and corrosion or every major storm event damage to anti -vortex device or trash rack; inspect pipe inspect the outlet for signs of corrosion or settling; inspect outlet structure, pipe, and protection for signs of erosion or damage. outlet protection. Vegetation Not applicable Not applicable Management Slope, Embankment, Repair any erosion damage to outlet protection. As needed based on and Outlet damage observed during Stabilization routine inspections Debris and Litter Keep outlet structure clear of debris. Remove debris Semiannually and after Control from the BMP and properly dispose of in an upland area. major rain events as a minimum. Debris removal may be more frequent. Mechanical If a drain valve is present, exercise the valve As noted Components semiannually to insure proper function. Periodically lubricate the stem and paint exposed metal to protect from corrosion. Insect Control Not applicable Not applicable Access Road and Remove woody plants and maintain surface in drivable Annually Area Maintenance condition Sediment and Not applicable Not applicable Pollutant Removal Component Repair Repair or replace outlet structure components to correct Infrequently and Replacement leakage, cracks, spalling, broken or loose sections, or corrosion. Repair or replace pipe to correct settlement, leakage, or corrosion. Repair or replace outlet protection to correct erosion damage. Take care to avoid changing the BMP discharge characteristics and to avoid damage to the embankment. Repairs and replacements may require consulting a professional engineer. COUNTY OF ROANOKE 9/22/15 14-7 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.3 Emergency Spillway Emergency Spillways are an integral part of many BMPs including detention and retention basins and constructed wetlands. Emergency spillways normally consist of an open channel, usually trapezoidal in cross-section, which are constructed beside an embankment to carry stormwater discharge from the BMP that is too great to be carried by the principal spillway. Emergency spillways should only discharge stormwater very infrequently Emergency spillways are most often vegetated (grassed), but may be protected against erosion by rip rap or concrete. For Emergency Spillways maintenance guidance, see Table 14.3. Table 14.3 Spillway Maintenance Required Action Maintenance Objective Frequency of Action Inspections Annually, and after any rain event that results in flow through the emergency spillway. Vegetation For a vegetated spillway the objective is to maintain a Mow grass at least Management healthy grass cover free of trees and brush twice during both • Mow grass to a height of 6 to 8 inches. growing seasons and • Remove all trees and brush from spillway. When once during the removing trees and brush, extract as much of the summer. root as possible. • Fertilize, lime, or treat with pesticide or herbicide when needed to maintain grass health (do not over fertilize). • Reseed spillway as necessary to maintain vegetation. Avoid over -fertilization. Slope, Embankment, Repair any damage to outlet. As needed based on and Outlet damage observed during Stabilization routine inspections Debris and Litter Keep the emergency spillway clear of debris and litter. During inspections or Control mowing Mechanical Not applicable Not applicable. Components Insect Control Not applicable Not applicable Access Road and Remove woody plants and maintain surface in drivable Annually Area Maintenance condition Sediment and Not applicable Not applicable Pollutant Removal Component Repair Repair slopes and protective linings as needed. Infrequently and Replacement COUNTY OF ROANOKE 9/22/15 14-8 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.4 Sediment Forebay A sediment forebay is used as a pretreatment device to allow sediment to settle from the incoming stormwater runoff before it enters the balance of the BMP. A sediment forebay helps to isolate the sediment deposition in an accessible area, which facilitates BMP maintenance. For Sediment Forebay maintenance guidance, see Table 14.4. Table 14.4 Sediment Forebay Maintenance Required Action Maintenance Objective Frequency of Action Inspections Observe depth of sediment deposition Annually Vegetation Not applicable Not applicable Management Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Remove debris and litter that accumulates in the During inspections or Control sediment forebay as needed intermittently Mechanical Not applicable Not applicable Components Insect Control Not applicable Not ap licable Access Road and Remove woody plants and maintain surface in Annually Area Maintenance drivable condition Sediment and Remove accumulated sediment. Dispose of Generally every 3 — 5 Pollutant Removal sediments in an upland area and stabilize with years or when 6 — 12 vegetation. If necessary, obtain erosion and inches of sediment sediment control permit, prior to performing land has accumulated. disturbance. Component Repair Not applicable Not applicable and Replacement COUNTY OF ROANOKE 9/22/15 14-9 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.5 Landscaping Landscaping is an integral part of many BMP's. It is important that the landscaping thrive in order for it to fully function for pollutant uptake and ground stabilization. For Landscaping maintenance guidance, see Table 14.5. Table 14.5 Landscaping Maintenance Required Action Maintenance Objective Frequency of Action Inspections Observe landscaping growing conditions. If Monthly during the first landscaping is not thriving, correct conditions by growing season. applying fertilization, pesticide, herbicide, or Annually, in the fall, soil amendment. thereafter. Vegetation Each site shall have a site specific landscape Varies. Different plant Management maintenance schedule, depending on the species communities will used, that includes guidance regarding methods, require different levels frequency, and time of year for landscape of maintenance. maintenance and fertilization. Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Remove debris and litter. During inspections or as Control needed intermittently during vegetation management. Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Not applicable Not applicable Pollutant Removal Component Repair Provide reinforcement planting after the first As needed based on and Replacement growing season, if necessary. Thereafter, observation during replace landscaping that dies or fails to thrive. inspections COUNTY OF ROANOKE 9/22/15 14-10 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.6 Stormwater Detention and Retention Basins For the design of basins see VA BMP Clearinghouse specifications. For maintenance guidance of stormwater basins, refer to the maintenance guidance for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. For additional maintenance guidance for basins, see Table 14.6. Table 14.6 Basins Maintenance Required Action Maintenance Objective Frequency of Action Inspections (1) (1) Vegetation (1) (1) Management Slope, Embankment, (1) (1) and Outlet Stabilization Debris and Litter Keep the embankment clear of debris During inspections or mowing Control and litter Mechanical (1) (1) Components Insect Control (1) (1) Access Road and (1) (1) Area Maintenance Sediment and (1), also remove accumulated sediment (1), Depending on the Pollutant Removal from basin area. Dispose of sediments effectiveness of the sediment in an upland area and stabilize with forebay and the condition of the vegetation. If necessary, obtain erosion watershed, sediment removal and sediment control permit, prior to from the basin may be required erformin land disturbance. eve 5 — 10 years. Component Repair (1) (1) and Replacement (1) Refer to the maintenance guidelines for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. COUNTY OF ROANOKE 9/22/15 14-11 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.7 Constructed Wetlands For use of constructed wetlands as a BMP, see VA BMP Clearinghouse specifications.. For constructed wetlands maintenance guidance, refer to the maintenance guidance for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. For additional maintenance guidance for constructed wetlands, see Table 14.7. Table 14.7 Constructed Wetlands( ) Required Action Maintenance Objective Frequency of Action Inspections (1), Document plant species distribution (1), Inspect at least and fatality rates and verify compliance semiannually for the first 3 - with landscaping requirements; years. document sediment accumulations, water elevations, and condition of the outlet. Vegetation (1) (1) Management Slope, Embankment, (1) (1) and Outlet Stabilization Debris and Litter Keep the embankment clear of debris During inspections or as needed Control and litter intermittently Mechanical (1) (1) Components Insect Control (1) (1 Access Road and (1) (1) Area Maintenance Sediment and (1), As necessary, remove accumulated (1), Depending on the Pollutant Removal sediment from constructed wetland area effectiveness of the sediment and re-establish vegetation. Dispose of forebay and the condition of the sediments in an upland area and watershed, sediment removal stabilize with vegetation. If necessary, from the constructed wetland obtain erosion and sediment control may be required infrequently permit, prior to performing land (every 10 years or less disturbance. frequent). Component Repair (1) (1) and Replacement (1) Refer to the maintenance guidelines for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. COUNTY OF ROANOKE 9/22/15 14-12 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.8 Infiltration Practices For the design of infiltration basins and infiltration trenches as BMPs see VA BMP Clearinghouse specifications. 14.3.8.1 Infiltration Basin For Infiltration Basin maintenance guidance, refer to the maintenance guidance for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. For additional maintenance guidance for infiltration basins, see Table 14.8A. Table 14.8A Infiltration Basin Maintenance �l> Required Action Maintenance Objective Frequency of Action Inspections (1), Inspect basin to ensure that the basin (1), Monthly for the first 6 - functions as designed. Examine infiltration months; and thereafter basin and outlet for clogging. Inspect for semiannually and after major erosion, slumping, excessive sedimentation rain events. levels and vegetation overgrowth. Vegetation Management 1 1 Slope, Embankment, (1) (1) and Outlet Stabilization Debris and Litter Keep the buffer area clean to reduce litter and During inspections or Control floatables minimizing the clogging of the mowing infiltration basin. Mechanical Ensure no standing water remains in basin Repair as needed based on Components after storm events. Standing water indicates observation during infiltration is clogged. semiannual inspection. Insect Control Remove accumulated sediment in basin and Remove sediment restore filtration area. If standing water is accumulation every 2 years or present during dry weather, the infiltration when infiltration basin has basin has become clogged. standing water. Access Road and Area (1) (1) Maintenance Sediment and Pollutant Sediment shall be removed and disposed in an Depending on the Removal upland area and stabilized with vegetation effectiveness of the sediment when sediment fills the sediment reserve forebay and the condition of capacity, or when the basin loses its the watershed, sediment infiltration capacity. If necessary, obtain removal may be required erosion and sediment control permit, prior to infrequently (every 10 years performing land disturbance. Avoid or less frequent). com actin the floor of the infiltration basin. Component Repair and (1) (1) Replacement (1) Refer to the maintenance guidelines for Earthen Embankments, Principal Spillways, Emergency Spillways, Sediment Forebay, and Landscaping contained in this chapter. COUNTY OF ROANOKE 9/22/15 14-13 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.8.2 Infiltration Trench For maintenance requirements of infiltration trenches, see Table 14.813. Table 14.813 Infiltration Trench Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect infiltration trenches to ensure that the Quarterly inspection BMP continues to function as initially for the first year, and intended. Examine for clogging of infiltration semiannual inspection trench. Document depth of water in thereafter observation well or assessable pretreatment device to assess dewater capacity of the facility. Vegetation Buffer strips shall be mowed to 4 to 6 inches Cut grass twice during Management to limit unwanted vegetation. both growing seasons and once during the Trees shall be pruned such that the drip line summer. does not extend over the surface trench. All trees shall be removed within the trench to Prune overhanging revent the uncture of filter fabric. trees annually. Slope, Embankment, Regrade, repair, and revegetate eroded and As needed based on and Outlet slumped buffer strips. damage observed Stabilization during inspections. Debris and Litter Keep the buffer area clean to reduce litter and During inspections or Control floatables minimizing the clogging of the mowing infiltration trench. Mechanical Not applicable. Not applicable Components Insect Control Not applicable Not applicable Access Road and Remove woody plants and maintain surface in Annually Area Maintenance drivable condition Sediment and Remove accumulated sediment in infiltration Every 2 years or when Pollutant Removal trench and restore filtration area. sediment causes infiltration trench to have standing water. Component Repair Remove and replace top 6"-12" gravel and As needed based on and Replacement filter cloth sediment barrier. observation during inspections. COUNTY OF ROANOKE 9/22/15 14-14 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.8.3 Porous Pavement For the design of porous pavement as a BMP see VA BMP Clearinghouse specifications. For maintenance requirements of porous pavement, see Table 14.8.C. Table 14.8.0 Porous Pavement Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect pavement to ensure proper Quarterly, and after every structural operation, and that the major rain events, until permeable aspect of the pavement has performance characteristics of not become clogged with debris. the structure has been verified; Measure water depth in storage layer thereafter, annually Vegetation Not applicable Not applicable Management Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Vacuum clean pavement surface, Monthly Control followed by high pressure water washing. Do not use sand or other abrasives during winter weather as they will clog the surface. Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Not applicable Not applicable Pollutant Removal Component Repair No repair is possible. If pavement Depends on frequency and and Replacement becomes clogged, complete replacement thoroughness of pavement is required. cleaning COUNTY OF ROANOKE 9/22/15 14-15 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.9 Bioretention Filter See VA BMP Clearinghouse specifications for the design of bioretention filters as BMPs. For maintenance guidance for bioretention filters, see Table 14.9. Table 14.9 Bioretention Filter Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect filter to ensure that it continues Semiannually to function as initially intended. Observe sedimentation, standing water, and vegetation. Vegetation Provide adequate fertilization, pruning, Varies depending on plant Management and other care for landscaping. species Slope, Not applicable Not applicable Embankment, and Outlet Stabilization Debris and Litter Remove debris and litter. During inspections Control Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Remove accumulated sediments and Annually Pollutant Removal dispose of them in an upland location and stabilize with vegetation. Component Repair Replace mulch layer. On an as needed Every 2 years for routine mulch and Replacement basis replace the planting soil and replacement. Every 5 years for vegetation to restore infiltration planting soil replacement. capacity to the underdrain. COUNTY OF ROANOKE 9/22/15 14-16 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.10 Sand Filters See VA BMP Clearinghouse specifications for the design of sand filters. For maintenance guidance for sand filters, see Table 14.10. Table 14.10 Sand Filter Maintenance Required Action Maintenance Objective Frequency of Action Inspections Monitor and document water level in filter Quarterly and after each chamber and rate of dewatering after storm major rain event for the events. first year, semiannually and after each major rain event thereafter. Vegetation Not applicable Not applicable Management Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Not applicable Not applicable Control Mechanical Not applicable Note applicable Components Insect Control Not applicable Not applicable Access Road and Remove woody plants and maintain surface Annually Area Maintenance in drivable condition Sediment and Pump out sedimentation chamber. If water Semiannually (midway Pollutant Removal has an oil skim, it should be removed by a between semiannual firm specializing in oil recovery and inspection events) recycling. Remove sediments and dispose of them properly in an appropriate landfill. Refill the first chamber with water to restore the water seal. Component Repair Remove and replace filter cloth and ballast Varies depending on the and Replacement gravel to restore filtering capacity when efficiency of the filter will no longer draw down within 40- pretreatment device hours. COUNTY OF ROANOKE 9/22/15 14-17 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.11 Grassed Swale See VA BMP Clearinghouse specifications for use of grassed swales as a BMP. For grassed swale maintenance guidance, see Table 14.11. Table 14.11 Grassed Swale Maintenance Required Action Maintenance Objective Frequency of Action Inspections Check for uniformity of vegetative cover or for . Weekly, until structural repair needed for concrete linings. vegetation is Check for sediment and debris accumulation and established. for erosion problems or bank sloughing. . Thereafter, semi- annually. • In addition, inspect grassed swale for damage after major rain events. Vegetation Objective is to maintain a healthy uniform Mow grass periodically. Management vegetative growth: Reseed as necessary. Use proper mowing techniques. • Mow grass to a height of 6 inches. • Collect and remove grass clippings. • Periodic weeding of invasive species and weeds. • Fertilize or treat with pesticide or herbicide when needed to maintain plant health (do not over fertilize). • Reseed and mulch any bare areas. Slope, Embankment, Regrade, repair, and revegetate eroded and As needed based on damage and Outlet slumped areas. Repair channel lining, outlet observed. Stabilization protection and rip rap where required. Debris and Litter Keep the channel clean to reduce litter and During inspections or Control floatables being washed downstream. mowing Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Remove accumulated sediment in channels, Depends on site conditions Pollutant Removal behind check dams, and at outfalls and culverts to perform annually at a maintain flow capacity and drainage. Repair any minimum. damage that occurs during sediment removal. Component Repair Repair or replace check dams to maintain Annually or as needed and Replacement temporary ponding and to maintain filtered flow through check dams. COUNTY OF ROANOKE 9/22/15 14-18 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.12 Vegetated Filter Strip See VA BMP Clearinghouse specifications for use of vegetated filter strips as a BMP. For vegetated filter strip maintenance requirements, see Table 14.12. Table 14.12 Vegetated Filter Strip Required Action Maintenance Objective Frequency of Action Inspections Check the vegetation for uniformity of • Weekly, until vegetation is cover, sediment and debris accumulation, established. and erosion. Check for proper operation of . Thereafter, semi-annually. level spreader, if present. . In addition, inspect filter strip for damage after major rain events. Vegetation Management Objective is to maintain a healthy uniform As dictated by conditions. vegetative growth: • If the area is maintained as lawn use proper mowing techniques. Collect and remove grass clippings. • Periodic weeding of invasive species and weeds. • Periodic pruning of woody vegetation to stimulate grown. • Fertilize, lime, or treat with pesticide or herbicide when needed to maintain plant health do not over fertilize). Slope, Embankment, Regrade, repair, and revegetate eroded As needed based on damage and Outlet Stabilization ground surface. observed during inspection Debris and Litter Keep the vegetated strip clean to reduce During inspections or mowing Control litter and floatables being washed downstream. Mechanical Not Applicable. Not Applicable. Components Insect Control Not Applicable. Not Applicable Access Road and Area Not Applicable. Not Applicable Maintenance Sediment and Pollutant Remove accumulated sediment and Depends on site conditions Removal reestablish vigorous vegetation cover. perform annually at a Dispose of sediments in an upland area and minimum. stabilize with vegetation. If necessary, obtain erosion and sediment control permit, prior to performing land disturbance. Component Repair and If level spreader is used, replace rigid lip Infrequently Replacement when necessary. COUNTY OF ROANOKE 9/22/15 14-19 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.13 Manufactured BMP Systems Several manufacturers have developed filter and screening devices which are gaining acceptability from the regulators as suitable BMPs for meeting stormwater quality requirements. These devices filter debris and sediment and other pollutants, such as metals and hydrocarbons from stormwater. Specific maintenance requirements for manufactured BMPs shall be in accordance with the manufacturer's specifications and warranty requirements. Provide the Manufacturer's specified guidelines for maintenance activities. See Table 14.13 for general maintenance guidance. Table 14.13 Manufactured BMP Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect structure and inlets and outlets Semiannual or as specified by to ensure structural integrity and proper the manufacturer. functioning of the facility. Vegetation Not applicable Not applicable Management Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Remove debris and litter that interferes As needed based on impacts Control with proper operation. observed during semiannual inspection. Mechanical Provide routine maintenance to valves, Per manufacturer's Components sluice gates, pumps or other mechanical instructions. devices per manufacturer's instructions. Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Clean manufactured screen or filter Annually or as required. Pollutant Removal vault of debris, litter and floatable materials. Remove any sediment and pollutant build-up from the vault. Component Repair Repair or replace tank or vault structure As recommended by the and Replacement if leaks or cracks develop. Replace manufacturer and as needed. filtering media when necessary for proper functionin . COUNTY OF ROANOKE 9/22/15 14-20 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.14 Conservation Areas Conservation areas are naturally vegetated areas used to provide a measure of stormwater quality control as open space or forested areas. Conservation Areas should be maintained in their natural condition or can be planted to meet the VA BMP Clearinghouse specifications. Conservation areas require an easement. For Conservation Areas maintenance guidance, see Table 14.14. Table 14.14 Conservation Areas Maintenance Required Action Maintenance Objective Frequency of Action Inspections Check the vegetation for uniformity of cover . Quarterly, until vegetation and growth, sediment and debris is established. accumulation, and erosion. . Thereafter, annually. • In addition, inspect area for damage after major storm events. Vegetation Management (1) Weed control to promote survival and If establishing new vegetation, rapid growth of trees and shrubs. continuous over first two years until vegetation is established. Vegetation shall be undisturbed after it has become established. Slope, Embankment, (2) Regrade, repair, and revegetate eroded As needed, based on damage and Outlet Stabilization and slumped banks. observed during inspections. Debris and Litter Keep the area clean to reduce litter and Annually, and after major Control floatables being washed downstream. storm events, clean debris and litter which has accumulated. Mechanical Not Applicable Not applicable Components Insect Control Normally n t applicable. Normally not applicable. Access Road and Area Normally not applicable. Normally not applicable. Maintenance Sediment and Pollutant Normally not applicable. If heavy Infrequent Removal accumulations of sediment occur, then either remove sediment accumulation or stabilize sediment accumulation in place with top soil and additional vegetation plantings. Component Repair and Normally not applicable. If major areas lose Rare Replacement trees due to fire, disease, or other cause, then replanting may be needed. (1) Note that most herbicides are very toxic to aquatic organisms. Follow listed instructions and never allow spray to enter waterways. (2) If maintenance work is required along the banks of jurisdictional streams or in wetlands, a permit may be required from the U.S. Army Corps of Engineers and the Virginia Department of Environmental Quality. COUNTY OF ROANOKE 9/22/15 14-21 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.3.15 Underground Detention Facilities Underground detention facilities are facilities that provide detention in underground pipes or chambers. For underground detention maintenance guidance, see Table 14.15. Table 14.15 Underground Detention Maintenance Required Action Maintenance Objective Frequency of Action Inspections Inspect condition of storage facility, outlet Semiannually structure, and presence of sediment and debris. Vegetation Not applicable Not applicable Management Slope, Embankment, Not applicable Not applicable and Outlet Stabilization Debris and Litter Remove debris and litter. As needed based on Control observations during semiannual inspection. Mechanical Not applicable Not applicable Components Insect Control Not applicable Not applicable Access Road and Not applicable Not applicable Area Maintenance Sediment and Remove accumulated sediments and Varies, depending on the Pollutant Removal dispose of them in an upland location and effectiveness of the stabilize with vegetation. pretreatment device. Component Repair Replace failed pipe, storage chambers, or Rare and Replacement other components. 14.4 Additional Maintenance and Repairs The routine maintenance items listed in the Maintenance Agreement are the minimum measures. If actual conditions demonstrate that additional maintenance or repairs are necessary for proper functioning of the stormwater management systems, they shall be provided by the responsible party. COUNTY OF ROANOKE 9/22/15 14-22 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES CHAPTER 14 14.5 Inspection and Maintenance Records The responsible party or property owner shall maintain records of stormwater management facilities' inspections and maintenance activities, and submit copies to the County, when requested. 14.6 References The VA SWM Handbook and VA BMP Clearinghouse website contain information on maintenance of all VA DEQ approved nonproprietary BMPs. COUNTY OF ROANOKE 9/22/15 14-23 MAINTENANCE MAINTENANCE OF STORMWATER MANAGEMENT FACILITIES APPENDIX 14B APPENDIX 14A MAINTENANCE AGREEMENTS Stormwater Management/BMP Facilities — Sample Maintenance Agreement can be found at http://www.roanokecountyva.gov/index.aspx?NID=331 Maintenance Agreements shall be submitted to: Department of Community Development Roanoke County Administration Center 5204 Bernard Drive P.O. Box 29800 Roanoke, VA 24018-0798 Procedures for submitting agreements: • Type all information on the agreement form. • Authorized property owner must sign form in black ink. • Signature must be properly notarized (black ink). • Attach a check for the recordation fee. • The Department of Community Development will coordinate the County Attorney and County Executive signatures, and recordation. • Maintenance agreements are required to be submitted, approved, and executed prior to the pre -construction meeting. COUNTY OF ROANOKE 9/22/15 14A-1 MAINTENANCE INSPECTION AND ENFORCEMENT Chapter 15 - Inspection and Enforcement CHAPTER 15 Inspection and enforcement can be divided into two distinct categories, construction and post - construction. Construction inspection ensures that the storm drainage systems and stormwater management facilities are constructed and installed in accordance with the approved Stormwater Management Plan. Once construction is complete, a final inspection will be conducted, and as -built documentation will be submitted to show that the constructed project meets the requirements of the approved Stormwater Management Plan. At this point, the responsibility for the operation and maintenance of the storm drainage systems and stormwater management facilities is transferred from the permittee to the property owner or responsible party. Where a project is constructed in phases, a final inspection shall be conducted of each completed phase as designated by the approved Stormwater Management Plan. The final inspection shall consist only of the phase being identified as complete. After construction is complete, the property owner or responsible party is required to conduct periodic inspections and maintenance of the stormwater management facilities. Property owner inspections and maintenance activities must be documented and maintained. The County of Roanoke will also conduct periodic post -construction compliance inspections of stormwater management facilities. 15.1 Construction Inspections Construction of storm drainage systems and stormwater management facilities shall comply with the approved final Stormwater Management Plan. Any changes to the approved design require a resubmittal to the County of Roanoke for approval. Inspections shall be performed by the permittee to ensure that construction conforms to the approved plans and specifications. Additional inspections will be performed by the County of Roanoke to confirm compliance. 15.1.1 Notifications to the County of Roanoke The permittee shall notify the County of Roanoke in advance of the start of construction and of the construction of critical components of a stormwater management facility. The following are examples of, but not limited to, critical components: Before the start of construction; Before installing a stormwater pond embankment; Before installing pond outlet structures; COUNTY OF ROANOKE 9/22/15 15-1 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 • Before setting any concrete BMP structures, this does not include precast drop inlets or manholes; • Before installing energy dissipation structures and any outlet structure into a jurisdictional stream (perennial or intermittent flow); • Before installing any infiltration or bioretention BMP; or • Any other key BMP component as determined by the County of Roanoke 15.1.2 Periodic Inspections The permittee is responsible to perform adequate inspection of the construction activities to confirm that the site is in compliance with the Erosion and Sediment Control Ordinance requirements and that the construction of storm drainage systems and stormwater management facilities and BMPs are in conformance with the approved Stormwater Management Plan. Upon completion of construction, the permittee must provide certification from a licensed professional that the completed project is in accordance with the approved plans and specifications and must provide documentation of regular inspections sufficient to adequately support compliance. All permittee inspections shall be documented and written reports prepared that contain the following information: • The date and location of the permittee inspection; • Whether construction is in compliance with the approved Stormwater Management Plan; • Variations from the approved construction specifications; • Corrective actions that have been taken to correct previous violations; • Any violations that exist or corrective actions that have been completed; and • The name and signature of the person who performed the inspection. The County of Roanoke shall conduct periodic inspections during construction. During the County inspection, the permittee will provide all permittee inspections which have been conducted since the last County inspection for County observation. If the County finds any violations, the permittee shall be notified in writing of the nature of the violation and of the required corrective actions. In conjunction, the County may issue an order requiring that all or part of the land disturbing activities permitted on the site be stopped until the specified corrective measures have been taken. If the County of Roanoke determines that there is a repeated failure to comply with the approved plans and specifications, enforcement action may be taken. COUNTY OF ROANOKE 9/22/15 15-2 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 15.1.3 Final Inspection and As -Built Documentation Prior to final acceptance of the project the permittee is required to submit to the County of Roanoke as -built documentation, confirming that the storm drainage systems and stormwater management facilities and practices that have been constructed conform to the approved Stormwater Management Plan. In addition, once the as -built documentation has been submitted, a final inspection will be conducted by the County of Roanoke to confirm that the as -built documentation conforms to the actual construction. As -built documentation shall include the following: General: • As -built survey conducted following construction, sealed by a Registered Land Surveyor and/or Professional Engineer. As -built plans shall be a "redline" of the approved plans and shall be to scale and provide a north arrow. • Stormwater easements and access easements shall be shown on the plans with metes and bounds. • Certification statement, signed by the permitee and a Licensed Professional indicating conformance with the approved Stormwater Management Plan (including certification to both the storm drainage and stormwater BMPs are in compliance with the approved plans). • A supplemental digital file is required for County records and shall be provided via the FTP site or on a CD-ROM made available in an AutoCAD format shown with the layer configurations described in Section 15.1.4. • The permittee's inspection log records with copies of all inspection test results documenting compliance with the approved Stormwater Management Plan. Storm Drain Systems: • All storm system structures identified and labeled the same as the approved plan. All structure elevations are to include an invert elevation, a top of grate (at grade) elevation and any opening elevations used for storm water intake purposes (NAVD 88). All data is to be verified to the closest hundredth of a foot (0.01). • All storm system pipes identified and labeled the same as the approved plan with upstream and downstream invert elevations (NAVD 88), the COUNTY OF ROANOKE 9/22/15 15-3 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 total length of the pipe run from end to end, with the calculated slope. All data is to be verified to the closest hundredth of a foot (0.01). Maximum tolerances shall be based upon the following: 1. Does the structure function properly (i.e. is pipe capacity greater than the calculated flow, etc)? 2. Has the proper amount of cover been provided? 3. Has a minimum as -built slope of 0.40% been provided or Q2 greater than 3 fps (whichever is more restrictive). Redline revision of approved storm drainage profiles and horizontal layout.plans for as -built storm drainages structures. . For changed values, strike thru the design value and enter the constructed value. • Label plan sheet as as -built. BMPs : Redline revision of approved Stormwater Management Plan for BMPs. For changed values, strike thru the design value and enter the constructed value. Provide as -built dimensions of the structures, grades, slopes, elevations, BMP components, etc on the plans to verify that the structure has been constructed correctly. • Update the BMP table on the plans and label as "as -built". Provide latitude and longitude of as -built BMP. • Provide available Manufacturer certification that the structure was installed correctly. • Label plan sheet as as -built. • A supplemental digital file is required for County records and shall be provided via the FTP site or on a CD-ROM made available in an AutoCAD format shown with the layer configurations described in Section 15.1.4. Ditch and Channel Sections: Provide ditch/channel cross-sections plotted to scale, 300 feet maximum intervals or portion thereof, minimum of 2 per ditch, with adequate spot elevations that defines the ditch section and slope as required by the approved plan. Label distances between spot elevations on the cross sections. The Engineer shall show the location on the swale where the cross section is being provided. COUNTY OF ROANOKE 9/22/15 15-4 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 • Cross sections are to be shown and labeled on the plan. Ponds: Maximum tolerances shall be based upon the following: 1. Does the structure function properly (i.e. is swale capacity greater than the calculated flow, etc)? 2. Has the proper amount of depth/freeboard been provided? 3. Has a minimum as -built slope of 2.0% been provided vegetated swales or 1.0% for riprap or concrete lined channels? 4. Has the maximum allowable velocity for the channel lining been exceeded? A supplemental digital file is required for County records and shall be provided via the FTP site or on a CD-ROM made available in an AutoCAD format shown with the layer configurations described in Section 15.1.4. The survey shall include enough information to verify that storage capacities are no less than the storage volume required by the approved Stormwater Management Plan. For retention and detention structures, a stage -storage summary table with design values and as -built values shall be included. The survey shall verify inverts and sizes of pipes, culverts, and outlet structures. • Show location of and label elevations and width of berm. • Show location and label dimension and elevations of spillways. • Label plan sheet as as -built. • A supplemental digital file is required for County records and shall be provided via the FTP site or on a CD-ROM made available in an AutoCAD format shown with the layer configurations described in Section 15.1.4. If it is determined from the as -built documentation that the storm drainage systems or the stormwater management BMP facilities have not been constructed in accordance with the approved Stormwater Management Plan, then corrective action will be taken to comply with the approved Plan or the permittee shall provide studies and information required by the County of Roanoke to demonstrate that the constructed systems will function equivalent to the approved Stormwater Management Plan. This includes meeting all flow, velocity, and regulatory requirements and that the approved elevation -storage requirement is maintained. COUNTY OF ROANOKE 9/22/15 15-5 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 Once the as -built documentation has been accepted by the County of Roanoke, the permittee shall schedule a final inspection of the project site prior to final acceptance of the project by the County and the return of performance bonds or securities. The permittee shall provide 48 hour notice of a final inspection to the County of Roanoke. 15.1.4 ACAD Digital File Requirements The following items shall be submitted in ACAD format with the as-builts. All items shall be tied to the State Plane Coordinate and NAVD 88. All items shall be set to an elevation of zero, unless otherwise noted. • Storm drainage pipe and structures. Structures shall be shown at their as - built location. • Stormwater BMPs shown at the as -built location. BMPs shall be labeled to match the plans. Ponds, swales, infiltration basins, etc shall provide as - built contours and have applicable elevation assigned to the line work. • Proposed topographic contours inside the site property boundary for the approved project. These contours are the line work as shown on the approved plans and are not surveyed as -built contours, but line work from the CAD drawings. Elevations shall be assigned to the line work. Surveyed contours are required as -built items (ie ponds, bioretention, etc) • Easements and right-of-ways. • Property lot lines. • Edge of pavement. • Building layout. 15.2 Post -Construction Inspections and Maintenance The property owner or responsible party is responsible for the proper operation, inspection, maintenance, and repair of stormwater management facilities, after the completion of construction, in accordance with the applicable maintenance agreement. All inspection, maintenance, and repair activities shall be documented. The responsible party shall inspect and maintain stormwater management facilities at the frequencies listed in the Maintenance Agreement, In addition to the inspections performed by the responsible party, each stormwater management facility will be inspected periodically by the County of Roanoke. In the event that the stormwater management facility has not been maintained and/or becomes a danger to public safety, public health, or the environment, the County of Roanoke shall notify the property owner, or responsible party, by registered or certified mail and issue a Notice of Violation. The Notice shall specify the measures needed to correct the situation and shall specify the time within which such measures must be COUNTY OF ROANOKE 9/22/15 15-6 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 completed. If the responsible party fails or refuses to meet the requirements of the maintenance agreement, the County of Roanoke, after reasonable notice, may apply a civil or criminal penalty and may correct a violation of the design standards or maintenance needs by performing all necessary work to place the facility in proper working condition, and recover the costs from the responsible party or property owner. 15.3 Records Parties responsible for the operation and maintenance of a stormwater management facility shall make records of the installation and of all inspections, maintenance and repairs, and shall retain the records for at least five (5) years. These records shall be made available to the County of Roanoke upon request. Examples of inspection records can be found on the BMP Clearinghouse website, in Appendix 15A, or obtained from Manufacturer literature. 15.4 Enforcement Any activity that is commenced without an approved Stormwater Management Plan, or is conducted contrary to the approved Stormwater Management Plan, may be subject to the enforcement actions outlined in the County of Roanoke Stormwater Management Ordinance. A property owner or responsible party that does not properly maintain a stormwater management facility in accordance with the maintenance agreement may be subject to the enforcement actions outlined in the County of Roanoke Stormwater Management Ordinance. 15.4.1 Notice of Violation When a County of Roanoke inspection has noted that a construction activity or maintenance of a stormwater management facility is not in compliance with the approved Stormwater Management Plan, including all maintenance agreements, or the County of Roanoke Stormwater Management Ordinance, the County shall issue a written notice of violation delivered by registered or certified mail to the permittee or property owner. The notice of violation shall include: • The name and address of the responsible party; • The address when available or a description of the building, structure or land upon which the violation is occurring; • A statement specifying the nature of the violation; COUNTY OF ROANOKE 9/22/15 15-7 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT CHAPTER 15 • A description of the remedial measures necessary to correct the violation and a time schedule for the completion of such remedial action; A statement of the penalty or penalties that may be assessed against the person to whom the notice of violation is directed, should the remedial measures not be implemented; • A statement that the determination of violation may be appealed by filing a written notice of appeal within 30 days of service of notice of violation. 15.4.2 Stop Work Orders If a project site is under construction and receives a notice of violation, construction activities in the area where the work was found to be deficient in meeting the approved Stormwater Management Plan shall cease immediately. The stop work order will be in effect until the County of Roanoke confirms that the land disturbing activity is in compliance with the approved Stormwater Management Plan. The permittee shall address the remedial measures published with the notice of violation within the time period specified. Upon completion of the remedial measures, the County of Roanoke shall inspect the work and authorize the permittee in writing that the stop work order has been removed and work may continue in that area of the project. Failure to comply with a stop work order or with a notice of violation may result in the revocation of the permit and the violator shall be subject to the penalties set forth by the Stormwater Management Ordinance. 15.4.3 Restoration of Lands Any violator may be required to restore land to its undisturbed condition in accordance with a notice of violation, stop work order, or permit requirements. In the event that restoration is not undertaken within the time specified in the notice, the County of Roanoke may take necessary corrective action, the cost of which shall be covered by the performance bond, or become a lien upon the property until paid, or both. COUNTY OF ROANOKE 9/22/15 15-8 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT APPENDIX 15A INSPECTION FORMS Stormwater Management Construction Inspection Checklist Stormwater Management Facilities Inspection Report Form APPENDIX 15A Stormwater Management Facilities Maintenance/Repair Report Form COUNTY OF ROANOKE 9/22/15 15A-1 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT Inspector Name: Permittee's Name: Site Address or Location: Watershed: Reason for Inspection: ❑ Routine Inspection ❑ Complaint Stormwater Management Construction Inspection Checklist Inspection Date: Permit Number: Tax Map or Parcel ID No: ❑ Intensive Rainfall ❑ Other APPENDIX 15A Disturbed Area (at time of inspection): Does the Site Require: ❑ Erosion and Sediment Control Plan ❑ Stormwater Pollution Prevention Plan ❑ SPCC Plan (oil storage) ❑ Other If required, are these plans or permits available on-site? Erosion and Sediment Control Item Used Acceptable Condition Observations and Actions Required Completion Date Silt Fence Y ❑ N ❑ Y ❑ N ❑ Straw Bales Y ❑ N ❑ Y ❑ N ❑ Inlet Protection Y ❑ N ❑ Y ❑ N ❑ Stabilized Construction Entrance Y ❑ N ❑ Y ❑ N ❑ Sediment Trap/Basin Y ❑ N ❑ Y ❑ N ❑ Check Dams Y ❑ N ❑ Y ❑ N ❑ Seeding (Temporary or Final) Y ❑ N ❑ Y ❑ N ❑ Other: Y ❑ N ❑ Y ❑ N ❑ Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Page 1 of 2 COUNTY OF ROANOKE 9/22/15 15A-2 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT Stormwater Collection and Transport (Culverts, Storm Drains, and Inlets) APPENDIX 15A Item Constructed as Approved? Discrepancies and Corrections Completion Date Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Y 1 N 1 Discharge Outfall from Development Adequate channel: Y 1 N 1 Signature of Inspector Page 2 of 2 COUNTY OF ROANOKE 9/22/15 15A-3 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT APPENDIX 15A Page 1 of 1 COUNTY OF ROANOKE 9/22/15 15A-4 INSPECTION AND ENFORCEMENT Checked Maintenance Item Inspected Observations and Remarks Yes No e Re d. Not R. Culverts and Storm Drains Is the culvert or storm drain filled more than 25% with debris, sediment, or trash? Is there evidence of structural El D failure of the culvert pipe? Is there evidence of erosion at the inlet and outlet of the culvert or at El 11 the storm drain inlet? Are there signs of settling, cracking, or misalignment of 11 Ll El 11 culverts, storm drain pipe, or concrete inlets? Stormwater Ponds see also Embankments Is the emergency spillway clear of obstructions, debris, and 11 El El El vegetation? Is the outlet structure and pipe clean of debris and sediment, free 11 El 11 of damage, and in working order? Is there an accumulation of debris, Ll El El 11 litter or trash? (For dry detention ponds) Is there 11 El 11 standing water in thepond? (For wet ponds) Is their excessive El L1 El 11 algae growth or other vegetation? I Is there evidence of oil or other pollutants in thepond? Is there erosion at the discharge 111 L] 11 point? Do any safety devices, fences, gates, or locks need repair? Page 1 of 1 COUNTY OF ROANOKE 9/22/15 15A-4 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT APPENDIX 15A STORMWATER MANAGEMENT BMP FACILITIES INSPECTION REPORT FORM Inspection Requirements: See the Stormwater Management BMP Facilities Maintenance Schedule for landowner's responsibilities for frequency of inspection and other requirements. This information is a part of the Maintenance Agreement that is recorded in the land records with the deed. Inspection Purpose: To assure safe and proper functioning of the stormwater management BMP facilities and associated structures, by providing regular observations of their conditions and operation. Retention of Records: All inspection/maintenance/repair documentation shall be retained by the landowner for a minimum of five (5) years. Submission of Records: At the end of each year, by December 31", mail all BMP inspection and maintenance documentation to: County of Roanoke Department of Community Development 5204 Bernard Drive Roanoke, Virginia 24018 Attention: Stormwater Program Manager (BMP Inspection and Maintenance Records) NAME OF BUSINESS OR LANDOWNER: ADDRESS: INSPECTION DATE: PERFORMED BY: Facility Management Checklist The following items should be checked for each BMP: 1. Facility construction meets the requirements of the Roanoke County Stormwater Management Design Manual, where applicable, and is adequate for the intended function. 2. The facility has been maintained properly according to the requirements of the Recorded Maintenance Agreement, BMP Maintenance Schedule, and the Roanoke County Stormwater Management Design Manual. 3. The facility is functioning adequately. 4. There have been no changes to the site conditions or area that would require modification and/or replacement of the existing facilities. 5. Access to the facility is adequate and maintained. Sheet 1 of COUNTY OF ROANOKE 9/22/15 15A-5 INSPECTION AND ENFORCEMENT INSPECTION AND ENFORCEMENT APPENDIX 15A STORMWATER MANAGEMENT BMP FACILITIES MAINTENANCE/REPAIR REPORT FORM Maintenance Requirements: Refer to the site's Stormwater Management BMP Facilities Maintenance Schedule for landowner's responsibilities for frequency of maintenance and other requirements. This Maintenance Schedule is a guideline of minimum maintenance requirements. Additional maintenance shall be performed as necessary for the proper functioning of Stormwater Management BMP facilities. This information is a part of the Maintenance Agreement that is recorded in the land records with the deed Maintenance Purpose: To enable the proper long-term functioning of the stormwater management BMP facilities to protect the Valley's water quality and prevent downstream flooding. Retention of Records: All inspection/maintenance/repair documentation shall be retained for a minimum of five (5) years. Submission of Records: At the end of each year, by December 31s`, mail all BMP inspection and maintenance documentation to: County of Roanoke Department of Community Development 5204 Bernard Drive Roanoke, Virginia 24018 Attention: Stormwater Program Manager (BMP Inspection and Maintenance Records) NAME OF BUSINESS OR LANDOWNER ADDRESS: MAINTENANCE/REPAIR DATE: PERFORMED BY: GENERAL COMMENTS: Sheet 1 of COUNTY OF ROANOKE 9/22/15 15A-6 INSPECTION AND ENFORCEMENT ACTION NO. ITEM NO. J.1-4 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: AGENDA ITEM: SUBMITTED BY: APPROVED BY: September 22, 2015 Appointments to Committees, Commissions and Boards Deborah C. Jacks Chief Deputy Clerk to the Board Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: 1. Capital Improvement Program (CIP) Review Committee (appointed by District): The following one-year term expired on August 31, 2012: a) Becky Walter, representing the Hollins Magisterial District; Ms. Walter has served three consecutive terms and therefore cannot be reappointed. The following one-year term expired on August 31, 2014: a) Jason B. Moretz, representing the Windsor Hills Magisterial District; Mr. Moretz is eligible for reappointment. The following one-year appointments expired on August 31, 2015: a) Paul St. Clair, representing the Vinton Magisterial District; Mr. St. Clair is eligible for reappointment b) Christina Flippen, representing the Catawba Magisterial District; Ms. Flippen is eligible for reappointment 2. Clean Valley Counsel (At Large) Adam Cohen has resigned his appointment to the Clean Valley Counsel. His three- year term expired June 30, 2015. Page 1 of 2 3. Economic Development Authority (EDA) (appointed by District) The following four-year terms will expire on September 26, 2015: a) Greg Apostolou, representing the Hollins Magisterial District is eligible for reappointment 4. Parks, Recreation and Tourism Advisory Commission (appointed by District) The following three-year terms expired on June 30, 2015: b) Atul Patel, representing the Windsor Hills Magisterial District has resigned his appointment effective August 27, 2014. c) Max Beyer, representing the Hollins Magisterial District; Mr. Beyer is eligible for reappointment. Page 2 of 2 K AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION APPROVING AND CONCURRING IN CERTAIN ITEMS SET FORTH ON THE BOARD OF SUPERVISORS AGENDA FOR THIS DATE DESIGNATED AS ITEM I- CONSENT AGENDA BE IT RESOLVED by the Board of Supervisors of Roanoke County, Virginia, as follows: That the certain section of the agenda of the Board of Supervisors for September 22, 2015, designated as Item K - Consent Agenda be, and hereby is, approved and concurred in as to each item separately set forth in said section designated Items 1 through 5 inclusive, as follows: 1. Approval of minutes — August 25, 2015 2. Resolution expressing the appreciation of the Board of Supervisors of Roanoke County to Adele Birkhead, Police Officer— Uniform Division upon her retirement after more than eleven (11) years of service 3. Resolution expressing the appreciation of the Board of supervisors of Roanoke County to Charlton D. Wilson, Parks, Maintenance Foreman, upon his retirement after more than forty (40) years of service 4. Request to accept and allocate funds in the amount of $13,399 from the Bureau of Justice Assistance to the Roanoke County Police Department for the fiscal year 2015 Edward Byrne Memorial Justice Assistance Grant (JAG) Program Local Solicitation 5. Resolution supporting House Bill 2 project applications by Roanoke County and the Roanoke Valley Transportation Planning Organization Page 1 of 1 ACTION NO. ITEM NO. K-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution expressing the appreciation of the Board of Supervisors of Roanoke County to Adele Birckhead, Police Officer — Uniform Division, upon her retirement after more than eleven (11) years of service SUBMITTED BY: Deborah C. Jacks Chief Deputy Clerk to the Board APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Officer Adele Birckhead, Police Officer -Uniform Division, retired on September 1, 2015, after more than eleven (11) years of service with Roanoke County. Officer Birckhead is unable to attend the meeting and her resolution and quilt will be mailed to her home. STAFF RECOMMENDATION: Staff recommends adoption of the attached resolution. Page 1 of 1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION EXPRESSING THE APPRECIATION OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY TO ADELE BIRCKHEAD, POLICE OFFICER — UNIFORM DIVISION, UPON HER RETIREMENT AFTER MORE THAN ELEVEN (11)YEARS OF SERVICE WHEREAS, Adele Birckhead was employed by Roanoke County on January 24, 2004 and has served as a Police Officer— Uniform Division during hertenure with Roanoke County; and WHEREAS, Ms. Birckhead retired on September 1, 2015, after eleven (11) years and seven (7) months of devoted, faithful and expert service to Roanoke County; and WHEREAS, Ms. Birckhead, throughout her employment with Roanoke County has been instrumental in improving the quality of life and providing services to the citizens of Roanoke County; and WHEREAS, throughout Officer Birckhead's career with Roanoke County, she was able to serve as a Field Training Officer, senior evidence technician and valued member of the Crisis Intervention Team. She additionally served as a valued member of Roanoke County's Employee Advisory Committee and the Police Department's policy review committee:. NOW, THEREFORE, BE IT RESOLVED that the Board of Supervisors of Roanoke County expresses its deepest appreciation and the appreciation of the citizens of Roanoke County to ADELE BIRCKHEAD for more than eleven (11) years of capable, loyal and dedicated service to Roanoke County; and FURTHER, the Board of Supervisors does express its best wishes for a happy and productive retirement. Page 1 of 1 ACTION NO. ITEM NO. K-3 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution expressing the appreciation of the Board of Supervisors of Roanoke County to Charlton D. Wilson, Parks Maintenance Foreman, upon his retirement after forty (40) years of service SUBMITTED BY: Deborah C. Jacks Chief Deputy Clerk to the Board APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Charlton D. Wilson, parks Maintenance Foreman, retired on September 1, 2015, afterforty (40) years of service with Roanoke County. Mr. Wilson is unable to attend the meeting and his resolution and quilt will be mailed to his home. STAFF RECOMMENDATION: Staff recommends adoption of the attached resolution. Page 1 of 1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION EXPRESSING THE APPRECIATION OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY TO CHARLTON D. WILSON, PARKS MAINTENANCE FOREMAN, UPON HIS RETIREMENT AFTER FORTY (40) YEARS OF SERVICE WHEREAS, Charlton D. Wilson was employed by Roanoke County on September 2, 1975, and has served as a Parks Laborer, Motor Equipment Operator I, Motor Equipment Operator II, and as Parks Maintenance Foreman during his tenure with Roanoke County; and WHEREAS, Mr. Wilson retired on September 1, 2015, after forty (40) years of devoted, faithful and expert service to Roanoke County; and WHEREAS, Mr. Wilson, throughout his employment with Roanoke County has been instrumental in improving the quality of life and providing services to the citizens of Roanoke County; and WHEREAS, throughout Mr. Wilson's career with Roanoke County, he maintained turf, park amenities, ballfields, and greenways for the public and recreation leagues, supervised the construction of several large playgrounds throughout the county, and where he worked directly with contractors to build Whispering Pines Park and Walrond Park, and where he supervised and operated equipment to re -build the infrastructure to re -open Camp Roanoke, and where he worked directly with staff to construct the Walrond Park Wetland Trail, and where he served in a vital role to coordinate the Parks Department's response for snow removal and outdoor emergencies at county facilities; and NOW, THEREFORE, BE IT RESOLVED that the Board of Supervisors of Roanoke County expresses its deepest appreciation and the appreciation of the citizens of Roanoke Page 1 of 2 County to CHARLTON D. WILSON, for forty (40) years of capable, loyal and dedicated service to Roanoke County; and FURTHER, the Board of Supervisors does express its best wishes for a happy and productive retirement. 2 ACTION NO. ITEM NO. K-4 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Request to accept and allocate funds in the amount of $13,399 from the Bureau of Justice Assistance to the Roanoke County Police Department for the fiscal year 2015 Edward Byrne Memorial Justice Assistance Grant (JAG) Program Local Solicitation SUBMITTED BY: Howard B. Hall Chief of Police APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The Roanoke County Police Department submitted an application to the Bureau of Justice Assistance for funding from the Edward Byrne Memorial Justice Assistance Grant (JAG). The Department will use the grant funds to procure two (2) new Watch Guard in Car Video Cameras with wireless downloading capabilities. These cameras will replace two (2) Digital Ally cameras, which are inoperative and it is no longer feasible to continue with expensive repairs. Via a letter dated August 13, 2015, the Bureau of Justice Assistance approved the application for funding under the fiscal year 2015 Edward Byrne Memorial Justice Assistance Grant in the amount of $13,399. The grant project period is 10/01/2014 to 09/30/2016. FISCAL IMPACT: The grant does not require matching funds from the County. Ordinance #052615-3 appropriated grant funds for grants that are routine and usual in nature for the 2015-2016 fiscal year. Funds in the amount of $13,399 will need to be allocated from the grant account to the fiscal year 2015 Edward Byrne JAG account. Page 1 of 2 ALTERNATIVES: 1. Accept and approve the allocation of grant funds in the amount of $13,399 from the Bureau of Justice Assistance to the Police Department for the fiscal year 2015 Edward Byrne Memorial Justice Assistance Grant (JAG) Program Local Solicitation. 2. Take no action at this time. STAFF RECOMMENDATION: Staff recommends alternative 1. Page 2 of 2 ACTION NO. ITEM NO. K-5 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY. VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: AGENDA ITEM: SUBMITTED BY: APPROVED BY: September 22, 2015 Resolution supporting Roanoke County and Planning Organization David Holladay Planning Administrator Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: House Bill 2 project applications by the Roanoke Valley Transportation At the September 8, 2015 work session, the Board of Supervisors reviewed proposed House Bill 2 project applications. Proposed applications by Roanoke County were discussed, followed by proposed applications by the Roanoke Valley Transportation Planning Organization. After review of the proposed projects, the Board of Supervisors directed staff to prepare a resolution supporting both lists of projects. House Bill 2 (HB2), signed into law in 2014, provides for new methods and procedures for scoring and funding transportation projects in the Commonwealth of Virginia. According to the Department of Rail and Public Transportation, through the new process, "Candidate projects will be screened to determine if they qualify to be scored. Projects will be scored based on an objective and fair analysis applied statewide. The law will improve transparency and accountability. The public will know how projects scored and the decisions behind the CTB's project selections." The following two lists of projects include both Roanoke County applications, and Roanoke Valley Transportation Planning Organization applications. Proposed House Bill 2 Projects for Roanoke County Application • Electric Road Widening, Safety, and Multimodal Improvements • McVitty Road / Old Cave Spring Lane Improvements • Lila Drive / Plantation Road Intersection Safety Improvements • Catawba Valley Drive / North Electric Road Intersection Safety and Congestion Improvements Proposed House Bill 2 Projects for Roanoke Valley Transportation Planning Organization Application • Interstate 81 Northbound Auxiliary Lane / Exit 141 to Exit 143 • Interstate 81 Widening / Exit 140 to Exit 143 • Route 220 Signal Coordination / Route 419 to Clearbrook Village Lane • Interstate 81 Interchange Lighting / Exit 137 to Exit 150 • West Roanoke River Greenway / Green Hill Park to Riverside Park • Interstate 81 Auxiliary Lanes / Exit 150 through Truck Weigh Stations FISCAL IMPACT None. House Bill 2 funding does not require local match. ALTERNATIVES: 1. Adopt the resolution supporting House Bill 2 project applications by Roanoke County and the Roanoke Valley Transportation Planning Organization. 2. Do not adopt the resolution. STAFF RECOMMENDATION: Staff recommends Alternative 1. AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER, ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION SUPPORTING HOUSE BILL 2 APPLICATIONS BY ROANOKE COUNTY AND THE ROANOKE VALLEY TRANSPORTATION PLANNING ORGANIZATION WHEREAS, at a work session on September 8, 2015, the Board of Supervisors reviewed proposed House Bill 2 project applications; and WHEREAS, the list of projects includes both Roanoke County application, and Roanoke Valley Transportation Planning Organization applications; and WHEREAS, the Board of Supervisors desires to support both local and regional projects to mitigate congestion, promote economic development, increase accessibility, safety, and environmental quality, as well as develop projects consistent with local land use policies. NOW, THEREFORE, BE IT RESOLVED by the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That the Board of Supervisors hereby supports the following House Bill 2 projects for Roanoke County application: a. Electric Road Widening, Safety, and Multimodal Improvements b. McVitty Road / Old Cave Spring Lane Improvements c. Lila Drive / Plantation Road Intersection Safety Improvements d. Catawba Valley Drive / North Electric Road Intersection Safety and Congestion Improvements Page 1 of 2 2. That the Board of Supervisors hereby supports the following House Bill 2 projects for Roanoke Valley Transportation Planning Organization application: a. Interstate 81 Northbound Auxiliary Lane / Exit 141 to Exit 143 b. Interstate 81 Widening / Exit 140 to Exit 143 c. Route 220 Signal Coordination / Route 419 to Clearbrook Village Lane d. Interstate 81 Interchange Lighting / Exit 137 to Exit 150 e. West Roanoke River Greenway / Green Hill Park to Riverside Park f. Interstate 81 Auxiliary Lanes / Exit 150 through Truck Weigh Stations 3. That the Clerk to the Board forthwith send a certified copy of this Resolution to Senator Mark Warner, Senator Timothy Kaine, Representative Bob Goodlatte, Representative Morgan Griffith, and Commonwealth Transportation Board members William H. Fralin, Jr. and Court G. Rosen. 4. That this resolution is effective immediately. Page 2 of 2 GENERAL FUND UNAPPROPRIATED BALANCE COUNTY OF ROANOKE, VIRGINIA Amount Unaudited balance at June 30, 2015 $ 21,799,195 Appropriated from 2015-2016 budget 506,153 ►Ti 5 % of General Fund Revenue 11.00% * Balance at September 22, 2015 $ 22,305,348 11.01 % ** Note: On December 21, 2004, the Board of Supervisors adopted a policy to increase the General Fund Unappropriated Balance incrementally over several years. * 2014-15 - Goal of 11 % of General Fund Revenues 2014-15 General Fund Revenues $198,174,499 11 % of General Fund Revenues $21,799,195 ** 2015-16 - Goal of 11 % of General Fund Revenues 2015-16 General Fund Revenues $202,656,326 11% of General Fund Revenues $22,292,196 The Unappropriated Fund Balance of the County is currently maintained at the goal of 11.00%. Submitted By Rebecca E. Owens Director of Finance Approved By Thomas C. Gates County Administrator COUNTY OF ROANOKE, VIRGINIA CAPITAL RESERVES Minor County Capital Reserve (Projects not in the CIP, architectural/engineering services, and other one-time expenditures.) Amount Unaudited balance at June 30, 2015 $ 1,612,726 Appropriated for 2015-16 Capital budget (907,344) July 28, 2015 Appropriation to purchase voting machines and equipment (384,000) Balance at September 22, 2015 $ 321,382 Major County Capital Reserve (Projects in the CIP, debt payments to expedite projects identified in CIP, and land purchase opportunities.) Unaudited balance at June 30, 2015 $ 2,601,112 Appropriated for 2015-16 Capital budget (1,583,412) Balance at September 22, 2015 $ 1,017,700 Technology Capital Reserve (Projects identified and prioritized by the Technology Governance Committee and approved by the County Administrator.) Unaudited balance at June 30, 2015 $ 314,058 Allocation to Computer Replacement Account (100,000) Balance at September 22, 2015 $ 214,058 Submitted By Rebecca E. Owens Director of Finance Approved By Thomas C. Gates County Administrator Submitted By Approved By RESERVE FOR BOARD CONTINGENCY COUNTY OF ROANOKE, VIRGINIA From 2015-2016 Original Budget Balance at September 22, 2015 Rebecca E. Owens Director of Finance Thomas C. Gates County Administrator M-3 Amount $ 50,000 $ 50,000 COUNTY OF ROANOKE, VIRGINIA CHANGES IN OUTSTANDING DEBT Changes in outstanding debt for the fiscal year to date were as follows: Outstanding June 30, 2015 Additions Deletions General Obligation Bonds $ 5,332,236 $ VPSA School Bonds 104,311,123 State Literary Loans 1,825,775 Lease Revenue Bonds 76,949,408 Capital Lease obligation 741,516 $ 189,160, 058 $ Submitted By Rebecca E. Owens Director of Finance Approved By Thomas C. Gates County Administrator M-4 Outstanding September 22, 2015 - $ - $ 5,332,236 7,761,248 96, 549, 875 - - 1,825,775 - 60,149 76,889,259 - 741,516 - $ 7,821,397 - $ 181,338,661 ACTION NO. ITEM NUMBER M-5 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER. MEETING DATE: September 22, 2015 AGENDA ITEMS: Statement of the Treasurer's Accountability per Investment and Portfolio Policy, as of 31 -Aug -15 SUMMARY OF INFORMATION: CASH INVESTMENT: SUNTRUST CON 23,165,331.93 23,165,331.93 GOVERNMENT: SCOTT STRINGFELLOW CONTRA (27,846.00) SCOTT STRINGFELLOW 42,010,621.41 WELLS FARGO 16,666,666.66 WELLS FARGO CONTRA (33,470.00) 58,615,972.07 LOCAL GOVT INVESTMENT POOL: 2,509,860.86 GENERAL OPERATION 10,176,749.57 10,176,749.57 MONEY MARKET: BRANCH BANKING & TRUST 1,081,433.19 SCOTT STRINGFELLOW - JAIL 1,102,700.22 SCOTT STRINGFELLOW 27,056,363.70 UNION FIRST 3,073,446.77 VALLEY BANK 2,509,860.86 WELLS FARGO 2,872,951.52 37,696,756.26 TOTAL 129, 654, 809.83 09/22/2015 N C C V cii C (C (o R 'J W O r O C O R O O Q d O N '^ 7 1 � v a V V 4)w 4)O � O C o � 00 R (O R m N C C (O M O O O O V O O LO O N O M 0 N a N r M r O N N O O - V O r M O M O O O 1.- N O r V 00 O N (O O O O � (fl O N N O N 00 N O r W a N M N W r O Cl) N M M O O LO O (o N c U- r O O O V O O Q d O O V LO (O M O O O O V O O LO O N O M 0 N a N r M r O N N O O - V O r M O M O O O 1.- N O r V 00 O N (O O O O � (fl O N N O N 00 N O r W a N M N W r O Cl) N M M O O LO O (o N O O r O O O V O O N O O V LO O O V V V O O O 00 O (O 0 O O 0 r 00 M O (O O O M r 00 OM M O O O O M 0 r N O_ O O 00 LO V O O M r O N LO _ O (0 O 00 00 Lr LO (O a0 O O V O O M L V Lr N 00 V V M O O 0 O N (O M ^ r N LO N 00 LO 0 V N N 00 V LO LO O N O O r (h - N N 0 (O O N O (C O O 00 (O O r M (O LO r 00 O O 0 00 (O 0 00 r O O O O O O O V O O M N (O (O (O 00 LO LO V N (O O O O O 00 O O r 00 r - O OO OO Lo (O 00 V (G r - r N N O M 0 O (O O N V 0 00 O O V 00 r O O M O V O O O V O M N O LO M LO M O O r V O N 00 O V r M O L V L V M O r M N V 00 LO O r O (h 00 Lo co O V 00 O (h (h O (p N () O LO V (0 LO(0 O O r O N r LO - M 00 N r N C (h 00 (h - - co M N LO O O O O (CJ O O O O O O O O O O O O O LO LO O N O O N O O O - O O O O O O O O O LO O (o O r r O M O O O O O (o O O O O O O O O (O 00 O O O O M O N LO M O O 00 1- LO O LO O O LO O O 00 L V w Lo 00 N Lo L 00 O 00 r 0 O V 00 (O M (o r (J O N 00 O M 0 V N N 0 N V LO LO O r O O 00 Cn (h - r V N r N I- - N M O M (O V N V 0 O V M N N V N H OM o N r ( O M CO O N O O O V O M O O O O O M LO O O O N r N O O O O (h LO O M V (o N r O O 00 00 O O M _ 00 N O (O 00 N O O M LO O (O r N O O N O N 00 00 r N O 00 - l!7 r 00 (D O - N O V N N LO V V O O O O V O r O V M 00 N (O 1. V O O O O O V 00 N a N O O V r M N O V (0 a O LO M (h O V r M Lq LQ r OD L V Cl! 00 00 O 0� M N (O N V O r O a LO (0 V LO M r M r _ a co (O U7 r V N O ^ COV 00 N co N N 00 C\l ' N O (y N N O O O O O O O O O O O O O O O O O O O LO 0 O (o O O 0 O O O O O O O O O O O O O O O O O r r M O M O O O M O O O O O O O O O O O O O O M M N O O O 00 C1 O O L6 O O O L6 O L6 L V a L6 00 N N LL � � .� Q (h O M 0 O O M O O r O 0 0 N V r N O O M r 75 N V O I- - Lq O O r V V O V 0 O O 0? N N V N H O N N ( O M CO O N O O O V O M O O O O O N O O O r O O N (n Q - a) U) A Qm N L U . 75 E2 N a) ly- 0- to o - U 0- O C: 06 = N 0- (1) 0 C a) N 0- A CLE O CL C i7 O U E O U X N U) W p J H �' - fA , O U H C J U) N Z3 m x H L N LL LL J U O 06 N O OfC N X N H (n X O O p OtS O S (n N N N N O d J L � yty+ V N LL � � .� Q (n 0 � m m J + N N LL N N O O O U N N U U L 0- 75 O N CO It F- O NN CO N N N N N H NN N N O O O O O O O O O O O O O O O O O O O O O O N 0) 7 C 0) d 7 m o (� � R •L o R N W O N U) o G D V C R J N N R 3 1 � v a 4) w 4) O � C o � N to um) m N 0) 7 C 0) d 7 m O O O O O 00 1- O O O ON O M I-- O O N N O M LO ((7 (fl M O V a _ O V M N I- r O O (h O O O 00 00 1-- 00 O(p O V r-, O (D N m O O O 0 N O r r- ^ In (D Ch O 00 (a N O O 0) r 00 (fl (D 0) N r-_ 0) V M LO 00M V O 00 O O O W O 00 0) T fl N O 00 N (D ( N N- r O V Cb O 00 O r cD (fl (G O r M [- O Pl%l (10 (fl I� (D V (fl m m O N 00 m 0) O 00 O V N (D 00 N ^ V W Cb I� 00 V M (D O (D O _ r I- M LO O O O M O O 0) 00 00 N V N O I� C) M O O O O O O O r Ch M O O r 00 00 00 M 00 N r O O 0) N O N r O N L r a 0) 0) O r-- LO V O O (fl r-- LO I- 00 00 O O N O O W 00 Cb 0) V O a (`') N (fJ (D O O O 0') LO 00 N O C1 N M V r (0_ V O N (fl _ O ' I� ((•� C) 00 00 r r N O V (CJ O r 00 N 00 l!i (D r r r Cl) M Cl) (fJ O O 0 (`0 C) r Cl) M V (1) 00 (D r N O O O O O 00 V N O (D r M O 1- V O O O O O O C) O O O O O O O r O m V w O (D LO (D O LO a O (o (fl (q O N N (fl V C> OO (fl (fl C1 O (10 (fl O O r N O (D (0 (D O r M N W) LO m Il- to Cl) I- 00 O LO O O ((•) (fl (l1 N M O LO (fJ LO (0 00 O LO 00 O 0 � r-_ O Y) (() ((7 - r O O LO r LO m N OO r- O N O LO 00 r (0 O r Ch (D O V r O M O M O O T O O O O I- V 1- 0') 00 m r 00 O � O (0 O O � O (ti (h M (fl 0) M 0) O m N CO O 00N O O O r O N r I- LO r W O r N LO O 00 00 O (h 00 r LO O (D O 00 O (D N O 1- a O O 00 00 O (1) 1- N a N LO OO r V N LO O 1` 00 (C O O O O (fl V O c (O O O � N O O Pl N 00 00 (p N ('? LO (D r 00 Cl) (D 00 (h 0) 0;) 00 Nr-_ M 00 00 LO (D - I- Cl) N N 00 00 Cl) V N O r Cl) ("> r (h (h N Cl) r (() r o (L N L Q d J N O O O O O 00 1- O O O ON O M I-- O O N N O M LO ((7 (fl M O V a _ O V M N I- r O O (h O O O 00 00 1-- 00 O(p O V r-, O (D N m O O O 0 N O r r- ^ In (D Ch O 00 (a N O O 0) r 00 (fl (D 0) N r-_ 0) V M LO 00M V O 00 O O O W O 00 0) T fl N O 00 N (D ( N N- r O V Cb O 00 O r cD (fl (G O r M [- O Pl%l (10 (fl I� (D V (fl m m O N 00 m 0) O 00 O V N (D 00 N ^ V W Cb I� 00 V M (D O (D O _ r I- M LO O O O M O O 0) 00 00 N V N O I� C) M O O O O O O O r Ch M O O r 00 00 00 M 00 N r O O 0) N O N r O N L r a 0) 0) O r-- LO V O O (fl r-- LO I- 00 00 O O N O O W 00 Cb 0) V O a (`') N (fJ (D O O O 0') LO 00 N O C1 N M V r (0_ V O N (fl _ O ' I� ((•� C) 00 00 r r N O V (CJ O r 00 N 00 l!i (D r r r Cl) M Cl) (fJ O O 0 (`0 C) r Cl) M V (1) 00 (D r N O O O O O 00 V N O (D r M O 1- V O O O O O O C) O O O O O O O r O m V w O (D LO (D O LO a O (o (fl (q O N N (fl V C> OO (fl (fl C1 O (10 (fl O O r N O (D (0 (D O r M N W) LO m Il- to Cl) I- 00 O LO O O ((•) (fl (l1 N M O LO (fJ LO (0 00 O LO 00 O 0 � r-_ O Y) (() ((7 - r O O LO r LO m N OO r- O N O LO 00 r (0 O r Ch (D O V r O M O M O O T O O O O I- V 1- 0') 00 m r 00 O � O (0 O O � O (ti (h M (fl 0) M 0) O m N CO O 00N O O O r O N r I- LO r W O r N LO O 00 00 O (h 00 r LO O (D O 00 O (D N O 1- a O O 00 00 O (1) 1- N a N LO OO r V N LO O 1` 00 (C O O O O (fl V O c (O O O � N O O Pl N 00 00 (p N ('? LO (D r 00 Cl) (D 00 (h 0) 0;) 00 Nr-_ M 00 00 LO (D - I- Cl) N N 00 00 Cl) V N O r Cl) ("> r (h (h N Cl) r (() r E oCD00CDm°°mo(niom(D0�CD0)i (1)) N M Oo (fl Lq O y a) i LL y LL Pl � V r OO V Ch O O O O O O Q U O 0) U Cn �_ O O O Ci 7 d d d y LL m (n r O (h M m V 00 LO 00 00 N 00 m 0 O LO N 1-_ N Cb 00 N H N LO LO O LO m I- r- � 00 1- 0 I- (D N 00 O (p (D r 0) r (D ^ 0 r LO (V r I-- V O N 0 r 1l. 0 0 0 0 0 (h (" ) r V N - Ch C14 E N 0 U) V u J R Q LL L0) CL N (D N �O 'O N LL y a) i LL y LL N C: C:o O O N EN O N > (If Q- O 0 (n D O a) > (If r- 4) d to O c 0) U (n (n (6 U (n U '> N (n . V 7 (n (6 U y V 0) fA " U) rn R U CO E (6 p) O -6 N E O O N > 7 N U (n (n (� N > 00 G y O C y -O _ Q U - N U c z (D U) N W (6 (n U N N Cn O 06 (p Q U O 0) U Cn �_ O (n N U N Cn O 06 (p (0 N N LL �_ 0 w a N U O (6 U O 7 d d d y LL m (n U) N O >� U c 11 O R r Fa H Ch H V V H V V H Oo (fl (fl H (D (D (D I- 00 00 00 H 0) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ri d oN V C � R O R fD W O N N o G D V C V R of pp fD r C N r R 1 � v a C N w 4) O � C o � �6 LL tum m i O O O M O O O 't O O O N N O O O -e O O N O W fD O LO N Y7 V N of pp fD r O O O r O O O M O O O -e fD W N r fD LO O O O O O � 1� O W O O LO O Y7 V OD of pp 00 C � r O O O � 0 0 o v (D O O 00 co v MJ M N CD v v v d V L 7 W W O LO W) N N V a W of pp 00 M C � e �C1 N r N d V L 7 O N of C � �C1 N C � N LL L d y L y m V H ~ R F- 0) ,L^ F V i a N _ E o d CL x = W W m as 56, I O v, v N d a10 h W O 00 i N c R m r-� N 0 �c O v r, v v M lD y v N � O O d V h � V F •--i M V1 7 � R �D a Q 'C N h fC N V i N M M R M 7 7 O O V W 10 a a �D r h Vi 5� G vi ' i a N _ E o d CL x = W W m as 56, I O v, v N v a10 h W O 00 i r- N N cn m r-� N 0 �c O v r, v v M lD y v v oo o O O o�t N V h O O vi O F •--i M V1 7 N 'r �D M Q\ N N h 00 N V N V M M f`1 M 7 GD O O x W 10 h a �D r h Vi ' vi ' M V N O Q\ N O V1 V1 M Cl V �D O N V V Q\ M M O 'n V O N h V O M O M O 'n w O Q� 10 N O 10 'ri Q\ �D n CT O N 00 O O lc l �D r M M 'n M 00 �D V 'D C Q\ O O O_ O 00 l 'n r O � 7 O 'n 7 O 0? Do 00 •� N 7 10 O vi 00 O Do V bo m V 7 •--i rl Vl 00 N N 00 M •--i M O y M ol Cl M Q1 In �D rl W M V Q\ 7 011 O\ W�D O O V V Ol �O �D O �D O O h .•-I V N h t` N N N VO O o7 O O i V ri �c ri to r v v v v o m C31)r-v kn r a; c r 00 Q\ h M C� �c O1 in w �D M O1 In �D �D M O1 M r O w Vl O M 00 '/� •--i 'n N Cl oo C1 Vl O •--i O 00 M N Vl O 00 O •--i Cl N O\ Vl M Vl 7 n ll� o0 s V Vl W O M a; 1 r o a; o v oo a, r -o v a ri - oo �_ M M V .•-I O O CT vi M O Q\ OD V1 V1 oo M h rl Q\ •� M N N •--i M V N CT �D h M •--i O O h O V •--i �--i N N ^-' kn N •--� '••� V W O W 01 V M h W W V kn M W Q1 �D N W N W M h h O 'n V1 Cl h CT W Vl V1 M V h O O h �O V1 Q1 'ri l O N Cl N M N N 'r O 7 In Q\ N N N V nQ\ M � C V O_ N ll� OD M M vi O O lD W 10 h a �D r h Vi �O vi W V1 N O Q\ 7 O V1 V1 M Cl O00 M V Cl N M 00 �O V V M OD kn Q\ l O 'n 00 O O 10 M t` N V1 V Q\ O O V Q\ M 7 � O 'n 'n W _ N 00 7 10 N r� h N N V h knen V V N m O N bo N N M O V h In 10 '/1 w O �O V1 N •--i V h In O •--i W O �O Q\ N h V 7 M h N V M h vi 7 vi vi vi •--i O 7 O O V O O h M r Cl v v o0 �c r M y m o r v o r r r M —M h Cl 00 00 O V O1 Q\ M O M N O O h h O 7 M �D 'D O\ - vl N l- V m m M m O O\ Vl V O CT M M l� V M 13 Vi O1 Ci N W V M 00 O\ V M N O\ 00 h lD M O1 O O 10 C� ID m V Q\ M Iz OO O W O O Vl W V N h 00 �D Cl IO o0 O rl N N 7 V •� •� 00 O M •� in Q\ �c W M •--i H N N •--� kn N �••� N M �O 10 Vl rl O O1 M NM_ O h h Q\ In W M V O In N 'ri l O N Cl N M N N 'r O 7 In Q\ N N N V nQ\ M � C V O_ N O 'n O r O ti O M Q\ a �D r h Vi �O vi O h vi 0) 00 O O Vi vi Mtr� W Cl M �D C\ M 00 W _ V h O 00 7 V �D vi N O O 10 O �O O V1 vi W N O V O O N �O O V1 vi �D W _ N 00 �••I vi �O oo bo O U O U � � bo ddd �, d O y ° ol dd dd � y0 C7 W s. U C5 •e� W U CJ h a a x N M O •--i N O •--i N M V O •--i N M V O M V CD O O O_ Cl O_ O �•-i O NN Cl O N O M O M O M O Cl) O M O V O V O V O V CD O V O 7 O vi O 'n O vi O 'n O O CD O O O O O O O O O Cl Cl O O O O O O O O O O O 0 O O rh NW -1 d w V O = R o � N R 7 V Q i d _ ' W i 0 _ o i a i 0 I I N 0 i y I C � LL I M I 0) O _ wEO d CL a X = W W m as 56, I W �O �O � ;; 10 M IT N 10 r kn rT r N O M �O N M O O O O O O O OD V N W 1(1 r M N V N r cl r 07 O 07 M 7 O O '/1 O M r m lO lr � N� N 7 00 n r GT rl Cl vi M r h m M �O 00 h m vi 10 10 en 'D mIz N M V O 00 O_ V1 V O 01 •--i W �O 10 O O O M V r r O r r Cl D N lc N •--i M r O N II ti M N t r oe O W r eq w Q N O r M V Q N 00 7 IQ r; to G� N 00 O Vl N N N M r N M O O O O •--i O N O 00 V M M M V O O �O O r O C7 O O O •--i O N O O O � 10 O O � O r O r O r O r r O o o0 w 0 0 00 w 0 0 w 0 M 00 0 N N O 10 r x O O O 00 O W M M N N O O O O O v Cl 00 C� c a t t o; r r O 111 ON r Q Q) O O M M O r O O O M n N r 7 V N O r 7 M r cl Q� �O V O 07 M 7 O O '/1 O M r m lO lr � N� N 7 00 n r GT rl Cl vi M r h m V �O 00 h m vi 10 10 en 'D mIz N M Q� V1 M •� CT O� O Q� 00 00 V •� 00 I() 00 00 N M 00 N W 00 V1 r H 00 V � N N m Vj ri •� 07 o u W r eq w Q N 00 � O 0 d A N 00 O Vl N M O O O O •--i O N O M O vi O O O H N 0) r O O 7 r V1 r Q O_ O O N N W O O 0) r O O O O M V O M ti V N_ M rl 111 N r O Ql O Q� r �O N O N O lr � N� N W r V1 r �D V Vi V O I() 10 h O NM �O 00 h m vi 10 10 en 'D h 7 CT Q� V1 M •� CT O� O Q� 00 00 V •� 00 I() 00 00 N M 00 N W 00 V1 r H 00 V M 00 O N 00 m Vj ri •� 07 o u W r eq w Q N 00 M O 0 d A N 00 00 r M Cl N O V 10 M 111 w G r W O O O O 00 10 r N �D O rT C� N N r M V1 C� M •--i O O O O O N �D � 00 vi CO N � V N 00 N 00 ti M r Cl O rl O oo rN O O O o O a V m V1 oe r r O O O O �O •--i O 7 v m r •� N N o In I r v v, O O O V1 � N� rl o0 M In M �D V Vi V O I() 00 M h 0o Vi N NM ~ V 00 h N o0 V1 O V1 10 N �c �O en vii vi V •--i ore O V •--i N r cc O M N •--i 0000 N � M N �D ti M C7 N r -- r O Ql �D Vl M M r -i N eq N o u W r eq w Q ti V M 00 7 d A N Q� O rl r V O O w O V O O O O N bA _ O V1 O 7 '/1 M C� O N r O V 00 V1 N V1 O O �o r O O O V1 N rl M In M �D V Vi V O I() 00 M h 0o Vi N NM �O V 00 h N o0 V1 O V1 10 N �c �O en h •--i O� N M N r Q� d V •--i I() r N �D W �D O Ql �D Vl M M r -i N �0 o u W o u w Q ti V M 00 7 d A 00 00 r u >z � bA � cC U O � d G' ❑❑ 'C �, W N +' G' G' a a o u W o u w Q m F o rx o= u d A N M O O O O •--i O N O M O vi O O O •--i N O O M V O O �O O r O C7 O O O •--i O N O O O � 10 O O � O r O r O r O r r O o o0 w 0 0 00 w 0 0 w 0 w 0 00 0 00 O a, O a) a O o u ACTION NO. ITEM NO. M-8 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: AGENDA ITEM: SUBMITTED BY: APPROVED BY: September 22, 2015 Accounts Paid -August 2015 Rebecca E. Owens Director of Finance Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Payments to Vendors Payroll 08/14/15 Payroll 08/28/15 Manual Checks Grand Total Direct Deposit 1,225,124.84 1,288,008.50 Checks 73,268.80 63,466.20 3,399.47 Total $ 7,793,694.48 1,298,393.64 1,351,474.70 3,399.47 $ 10,446,962.29 A detailed listing of the payments to vendors is on file with the Clerk to the Board of Supervisors. ACTION NO. ITEM NO. N-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Work session to discuss the impact of mental illness on law enforcement and a Department of Justice "Smart Policing" Grant that has been awarded to the Police Department SUBMITTED BY: APPROVED BY: Howard B. Hall Chief of Police Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: This time will be used to discuss the impact of mental illness on law enforcement operations as well as a grant that has been awarded to the Police Department to implement and evaluate crisis intervention strategies. The attached presentation will be used. Page 1 of 1 0 O 0 �i r II 2 a LU J W G O W z 0 as LULU J� LU a U_ J ®� z za >m ®� CLcoj V, "w o •� N U o N - v N O p a -J %4..- N L N O Q "'o O Q N - U CX) L N � — 4- .E O •i - O _ Q r -I \ O � • N � � a_+ i N U L :3 N — N f6 U O N f6 cr O •� v � ate-+ t1A cn •� U f6 U f6 N N � f6 L CL •� N O O N N O > L N O f6 O N N O > E • v O U Is�1 I* rte^/ W N m � ^'i O M N 0 � ` m 0 N � N M O 0 M � Ln O Ln O Ln O Ln O M M N N r -I r -I I X C 00 .(A � O O � � U +, o +� oC: O O i C: O E O ca N .� E au c� +� CL o c: E o E OU ' � ca o w 0 � ( ca %+-i -C X � U 00 ca +., 0 Q) , ca �— U +-+ ` 0 N 4_j C:' U W O O X CO > a N 07 0 C: o " J U O s C: C:U +� j v +� w O a -- ca ca O Q. 'F .0 W M 'O Ln CU 0 -0 -0 N N N i N N0 o- N O -\— OD U -0 00 w 0 w oC 4-J ~ / N N ■ ■ Ln 0 N Q m Q m o N N N o LO .� Z Z N m NLr1 m LO I- 0 00 m m 00 r-4Ln N r -I N Ul en LO o ^ m m N m 0`0 Q rn N N z o Ln LOo`°o Q N Ln Ln m z Lo r -I LO C o n �' LO m z Ln N 00 N o r14 n Ul 0 o Ln 00 m z N fi H f0 O f� Gl VC C Li W C Q cn Ln +j V) Z3 bD bD Z3 O L L C6 E O L v m V) +J O U Lli 0 N �3E 4- 00 U c LA (1) f6 Q i —J N 0 N ca Q N N a -J O S a -J a -J O E ca N E ; E O�' O 00 c6 4-00 .� N O O 4-1 � Nm I� N Q) Q) i i E N }: x N v > f6 .0 +0+ O +0+ Q O Q r p N S N vi �� O E f�6 .� E N LL m � .`� z; u - O (1) O u •> Q Q N Q) O Lf)E L- uoL.LJ O N O N oLU•� U� �J N v^ �vv v E O v r•I a-+ _ 0 � •ice` � � � pi ca Q N S M w v v O N N> -0 O� ca � O Oova �o� o NO E M U N O •N E,Ln O = O � O O O N cv Cf• O +- O O D CL � �• � CO m u Q r -j 0 LU 0 0 0 w LL 0 D LL 0 z I_I_I U crw a_ 00 m r -I r - r -I N N (3) O m r -I Q1 r- m O O N r -I 00 r C6 J O W C cu L= rr% Q) / m L/) w l.� W Z >. w U) O W F - z z Ln 0 �y t� LU 00 Q0 -tn }' O 07— Q) 7— N -- o • O 4- " C: Q N I E � O U m 4-j O O Q N U �N N U +-+ O ca O E E O to LU W Z } pC �~ Qn 44 O 0 7 W cr.cc W L) > Z � gra Grp NO E }' O V) U L � .75 N cn cii }, O c -0 a--+ }' U cn Eate--+ 4 -JO O 'U_ E _N-_`~ .X E .0 O U O � 70— a) N E O O O a) N gra Grp NO E }' O V) U r0 ro to 0 buo .7 0 •O E a -J ca cn 4-2 ca E M, N T ^� W ^E W V Ca E v tL0 Ca ca 4A .Cl U Ca U L- ro O O ro N Cl ca 1 ^C: v O U _ O •� Ca _0 > C:i U •� U 0 N Cl ro +-' U aJ :3 E4 - to buo>- C: _0 ateJ v ca QJ U Cl X N v C:L QJQJ "4-J co :3 O U _I_- ca Cl co O • crn v .L- Q U i 00-0-1 ^ r'1 U 0o w U U 0 0- • E U 0 C: U �� Ua� A� m cn 0-'- O CO N 'O 0 cn= 0 cn U fa ate-+ fa i N N N cii C U C: utxb �•>ca0�� 'N Q'0 X Q +� 0 w cn > j O 0 aj a� •— L N C: 0 • S✓ a--+ , U 0 a-+te cn ca `n O Lu e _U 4— A E Ln > t1A E 4 Z0 °U' v .� U L C6 QJ ate-+ U 4-j a -J N U � Q�J V) Ca U •Q v V) QJ U . _ c6 c6 +, O =3 � v c� bz Q,— > v U °U' v v 0 N CL X 4-J =3 Q Qz c 4-j o o Q) c� `- c v "-•`-' °— `� � v ro o bn o o — o — v N N Q) N Q) N U o •� 0 N Q, — O U U �, - v v>, v x O v > ca C:O — v N Q O > O .� N v � a c� o > }, aA N v *� V) _0 u U N Q) _ > > -J N> a, � U v 4-J O }' ca 4-1o 4-J ca � � -�' 4-J o o o U +� �V= o > z � oc N v O =3 4-J o c� wu�O v vi a E N E 0 0 0- E 0 s O E O r -I Ln N m s a� E CNA O C C Q � m 'N N > N Q fa U � •aA 70 O •QO p •E -0 � — p U p LL ca • – O – }, � U O � � � 00 p � cn ate-+ • s E o O a ._ O N O aj � v, C: ca • – � O � cn � Q a o 0.� 0 vi a E N E 0 0 0- E 0 s O E O r -I Ln N m s a� E CNA O C C Q � m 'N N > N Q fa 70A ACTION NO. ITEM NO. 0-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Proclamation commemorating the 150th anniversary of the Big Hill Baptist Church SUBMITTED BY: Deborah C. Jacks Chief Deputy Clerk to the Board of Supervisors APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: This item is placed on the agenda for consideration by the Board of Supervisors at the request of Supervisor Church to recognize Big Hill Baptist Church on their 1501h anniversary. Page 1 of 1 AN ClTuuntV of �vauvhjc OA1471t O� RN��F ti A 2 � J d= 1838 COMMEMORATING THE 150TH ANNIVERSARY OF THE BIG HILL BAPTIST CHURCH WHEREAS, After the Civil War in 1865, a group of families who were living west of Roanoke County called Big Hill decided to organize a church where they could worship God freely and openly. Several acres of land almost at the top of that dreaded "big hill' along old Lee Highway were given to them by an ex -slave holder named Duckwilder; and WHEREAS, Deacon Bird Banks had an old gray mare, which he loaned for the dragging of logs to build the church. His youngest daughter Christina, then in her early teens rode the mare as a guide while dragging the logs. There were many such acts of cooperation among the families which was necessary to complete the church; and WHEREAS, After many months of hard work, this humble edifice was ready for use in the year 1878. A business meeting was called and the name "Big Hill Baptist Church" was suggested. Rev. Walker Smith was called to be the first pastor. The first permanent officers were selected in 1883; and WHEREAS, The church grew in membership so much that the building could not accommodate the members and the newly organized choir. In May 1898 using the stones and other materials of the old church and with the help of many members doing the work a new church was built. The first service was held on the 3rd Sunday in July 1898; and WHEREAS, Over the years there have been numerous pastors who have served here at Bill Hill. Our present Pastor, Rev. Thomas W. and First Lady Towanda Penn came to us August 29,1993; and WHEREAS, Our Fellowship Hall "The Wing of Faith" was completed and ready for use in July 1987. Specials thanks is given in memory to Sisters Ruth Brewer, Pauline Burkes and Lucille Anderson who spearheaded this huge project; and WHEREAS, Beloved Sister Leona Carter, is the oldest member and the Mother of Our Church. Sister Carter will celebrate her 918t birthday on September 27th. NOW, THEREFORE, WE, the Board of Supervisors of Roanoke County, Virginia do hereby proclaim the commemoration of the 150th anniversary of the Big Hill Baptist Church and affirms its support for the values and optimism that have sustained its growth and become its hallmark. Presented this 22"d day of September 2015 P. JasBn Peters, Chairman ?fseph. McNamara, Vice -Chairman A Be sian P1 i r -n R4.9 1 Alin A A Josdph B. "Butch" Church QM ---e Charlotte A. Moore ACTION NO. ITEM NO. 0-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Resolution recognizing Hollins Fire and Rescue Department #5 for sixty-five (65) years of service SUBMITTED BY: Stephen G. Simon Chief of Fire and Rescue APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: The Hollins Fire and Rescue Department #5 is celebrating sixty-five (65) years of service to the citizens and businesses of north Roanoke County this month. They recently held an Open House to celebrate this milestone and welcome the community to visit the station for a cookout along with childrens activities, blood pressure checks and the like. Below is a history of this volunteer organization. In 1950, led by Volunteer Chief E. L. Honaker, a group of twenty-one local male citizens formed the Hollins Volunteer Fire Department to provide safety to the northern part of Roanoke County. They received support and funds from community individuals and businesses. The second Monday of the month was established as their monthly meeting day, a tradition that continues today. In the early years, volunteers used pumper trucks housed in a four -bay station (located about a half mile down Peters Creek Road from the current station) to protect the rural and suburban residential landscape. At that time, specific training or medical requirements did not exist; whereas today, pre -entry medicals for career and volunteer firefighters are required, along with other County training policies. In 1953, Hollins Volunteer Rescue Squad got its start and joined the Hollins Volunteer Fire Department, becoming the Hollins Volunteer Fire and Rescue Department. Page 1 of 2 In 1968, Roanoke County hired their first full-time paid firefighter, Roger Huffman, who was initially assigned to the Hollins Station. This was the beginning of a combination volunteer and career (paid) system. Huffman's initial responsibility was driving the fire truck, picking up volunteers along the way and meeting others at the emergency scene. The idea was to save time by simultaneously sending the fire truck and dispatching the volunteers, who were leaving work. Along with protecting residential areas, the Hollins station also covers commercial, industrial and high-rise structures today, as well as providing automatic and mutual aid for the Roanoke Regional Airport. The station houses a wagon, 105 -foot ladder (one of four in the county), a specialized rescue engine, three ambulances, a fire investigation unit, a fire and severe weather safety education trailer and two utility vehicles. In 1981, a new station was built on Barrens Road and, after a few additions, now includes twelve bays and a remodeled kitchen. The renovations over the years now accommodate three 24/7 career personnel shifts. Today, Volunteer Fire Chief Robert Ketchum and Volunteer Rescue Chief Jeff Edwards lead the Hollins Volunteer Fire and Rescue Department. The membership has grown and changed, reflecting the community it serves. The Hollins Station serves nearly 14,000 citizens, businesses and industrial areas throughout northern Roanoke County and provides back up to the Catawba and Masons Cove areas. The station responds to more than 2,200 calls each year. Hollins Fire and Rescue volunteers have—and continue to be—willing to lend a helping hand, not just to their fellow fire and rescue organizations throughout Roanoke Valley, but they also provide public education about fire prevention and safety, as well as offer tours to children, civic and other community organizations. Hollins firefighters share the credo: "No One Left Behind," while Hollins rescuers adhere to the motto: "Save a Life Today." Through the thick and thin, the good and the bad, the wins and the losses, Hollins Fire and Rescue stand by the belief they are a brotherhood and sisterhood that cannot be broken. Page 2 of 2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA, HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION RECOGNIZING HOLLINS VOLUNTEER FIRE AND RESCUE DEPARTMENT #5 FOR SIXTY-FIVE (65) YEARS OF SERVICE WHEREAS, in September, 1950, led by Volunteer Chief E. L. Honaker, a group of twenty-one (21) men formed the Hollins Volunteer Fire Department to provide safety to the northern part of Roanoke County; and WHEREAS, their beginnings were humble as they relied on support and funds from community individuals and businesses; and WHEREAS, in the early years, volunteers used pumper trucks housed in a four -bay station (located about a half a mile down Peters Creek Road from the current station) to protect the rural and suburban residential landscape; and WHEREAS, in 1953 Hollins Volunteer Rescue Squad got its start and joined the Hollins Volunteer Fire Department, becoming the Hollins Volunteer Fire and Rescue Department; and WHERAS,iln 1981, a new station was built on Barrens Road and, after a few additions, now includes twelve bays. The station houses a wagon, 105 -foot ladder, a specialized rescue engine, three ambulances, a fire investigation unit, fire and severe weather safety education trailer and two utility vehicles; and WHEREAS, along with protecting residential areas, the Hollins station also covers commercial, industrial and high-rise structures, as well as providing automatic and mutual aid for the Roanoke Regional Airport; and WHEREAS, currently, Volunteer Fire Chief Robert Ketchum and Volunteer Rescue Chief Jeff Edwards lead the Hollins Volunteer Fire and Rescue Department. The Page 1 of 2 membership has grown and changed, reflecting the community it serves. The Hollins Station serves nearly 14,000 citizens and businesses throughout northern Roanoke County and provides back-up to the Catawba and Masons Cove areas. The station responds to more than 2,200 calls each year; and WHEREAS, Hollins firefighters share the credo: "No One Left Behind," while Hollins rescuers adhere to the motto: "Save a Life Today." Through the thick and thin, the good and the bad, the wins and the losses, Hollins Fire and Rescue stand by the belief they are a brotherhood and sisterhood that cannot be broken. NOW, THEREFORE, BE IT RESOLVED that the Board of Supervisors of Roanoke County, Virginia expresses its deepest appreciation and the appreciation of the citizens of Roanoke County to THE HOLLINS VOLUNTEER FIRE AND RESCUE DEPARTMENTfor over sixty-five (65) years of dedicated service to Roanoke County. Page 2 of 2 ACTION NO. ITEM NO. P-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: AGENDA ITEM: SUBMITTED BY: APPROVED BY: September 22, 2015 Resolution appointing the County Attorney and approval of an employment contract Deborah C. Jacks Chief Deputy Clerk Thomas C. Gates County Administrator SUMMARY OF INFORMATION: Attached is a resolution for consideration by the Board of Supervisors to appoint a new County Attorney. This resolution also requests the Board's approval of the employment agreement for the County Attorney and would authorize the Chairman of the Board to execute this agreement on its behalf. STAFF RECOMMENDATION: It is recommended that the Board favorably consider the adoption of this resolution. Page 1 of 1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 RESOLUTION APPOINTING THE COUNTY ATTORNEY AND APPROVAL OF AN EMPLOYMENT AGREEMENT WHEREAS, Chapter 7 of the Roanoke County Charter provides for the appointment of a County Attorney, his or her powers and duties, compensation and tenure. WHEREAS, Section 15.2-1542 of the Code of Virginia establishes the various duties and responsibilities of the County Attorney, and WHEREAS, an employment agreement between the County Attorney and the Board of Supervisors has been negotiated. NOW THEREFORE, BE IT RESOLVED, By the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That Candidate, subject to acceptance of the terms and conditions of employment, is hereby appointed County Attorney for Roanoke County, and that his/her tenure shall commence on or before December 1, 2015. 2. That Candidate shall exercise all of the powers and fulfill all of the duties and obligations of County Attorney as provided in the Roanoke County Charter, the position description, the policies and regulations adopted by the Board and the legal directives of the Board. 3. That an employment agreement is hereby approved, and the Chairman of the Board is hereby authorized to execute this agreement of behalf the Board. Page 1 of 1 EMPLOYMENT AGREEMENT This Agreement is made and entered into this day of September, 2015, between the Board of Supervisors of Roanoke County, Virginia (the "Board") and Candidate (the "County Attorney") and sets forth the terms and conditions of his/her employment by the Board as County Attorney for the County of Roanoke, Virginia ("Roanoke County"). WITNESSETH WHEREAS, the Board desires to employ the services of Candidate as County Attorney of Roanoke County, Virginia ("Roanoke County"); and WHEREAS, it is the desire of the Board to (1) secure and retain the services of a County Attorney and to provide inducement for him/her to remain in such employment and (2) to provide a just means for termination of the County Attorney's services at such time as he/she may be unable fully to discharge his/her duties or when the Board may desire to otherwise terminate his/her employment; and WHEREAS, Candidate desires to accept employment as the County Attorney for Roanoke County, Virginia; and WHEREAS, the parties wish to enter into an agreement setting forth the terms of such employment during such period; and NOW, THEREFORE, in consideration of the mutual covenants herein contained, the Board and the County Attorney agree to the following terms and conditions of employment: Section 1. Employment of and Duties of County Attorney. a. The Board hereby agrees to employ Candidate as County Attorney of Roanoke County to serve as the chief legal officer and advisor of Roanoke County. b. The County Attorney shall perform the functions and duties of County Attorney as prescribed by Chapter 7 of the Roanoke County Charter, Section 15.2-1542 of the Code of Virginia, and those set forth in the position description for the County Attorney approved by the Board and attached hereto as Appendix A and as amended from time to time, policies and regulations adopted by the Board, and the legal directives of the Board, and shall be identified as the County Attorney. The County Attorney shall devote all necessary time, skill, labor, and attention to such duties as the chief legal officer and advisor of Roanoke County. C. The County Attorney shall have charge of the administration of the Roanoke County Attorney's office under the direction of the Board. The County Attorney shall fully and completely inform the Board of Supervisors of any and all legal issues and information that is relevant to the functioning of the Board and the County. The County Attorney shall Page 1 of 7 be the chief legal officer and advisor for the Board; shall select, organize and assign all his/her personnel, as best serves Roanoke County government, subject to the policies of the Board and the laws of the Commonwealth; shall represent the County in all civil matters and business affairs of the County; shall from time to time suggest ordinances, resolutions, regulations, rules and procedures deemed necessary for the well ordering of Roanoke County; and in general perform all duties incident to the office of the County Attorney as prescribed by law and Board policy. d. The County Attorney shall perform any other legally permissible duties or functions which the Board may see fit to assign at any time during the term of this Agreement consistent with the office of the County Attorney. Section 2. Commencement of Employment; Term; County Administrator Serves at the Pleasure of Board. a. The County Attorney shall commence his/her services in that position on December 1, 2015 and for a term of three (3) years. b. The Board and County Attorney acknowledge that the County Attorney serves only at the pleasure of the Board. Nothing in this Agreement shall prevent, limit or otherwise interfere with the right of the Board of Supervisors to terminate the services of the County Attorney at any time, with or without reason, provided that it may not do so for any reason which would contravene the laws of the Commonwealth or the Constitution or laws of these United States, and subject only to the Termination and Compensation provisions set forth in Section 3 of this Agreement. C. Nothing in this Agreement shall prevent, limit or otherwise interfere with the right of the County Attorney to resign at any time from his/her position with the County, subject only to the provisions of Section 4 of this Agreement. d. The Board shall provide the County Attorney with at least six (6) months' notice of its intent not to renew this Agreement. Section 3. Termination and Compensation Pay. a. Termination by Board without cause; notice. The Board shall have the right to terminate this Agreement at any time by providing the County Attorney with written notice setting forth the effective date of termination b. Termination by Board for cause. The County Attorney may be terminated by the Board for sufficient cause which shall include material breach of this Agreement, willful non-compliance with laws and regulations or Board policies, conviction of any felony or any crime involving moral turpitude, loss of license to practice law in the Commonwealth of Virginia, or conviction of a crime involving his/her employment with Roanoke County or an act involving gross and willful negligence pertaining to the execution of responsibilities of the County Attorney. In the event of such termination for cause, all salary and benefits shall cease as of the effective date of such termination. The County Attorney shall be Page 2 of 7 entitled to payment for accrued flexible leave, and holiday leave in accordance with Section 7 of this Agreement. C. Compensation Pay. In the event of termination as provided in paragraph "a" of this Section the County Attorney shall be entitled to payments for equivalent to six (6) months of annual base salary from the effective date of termination and flexible leave and holiday leave in accordance with Section 7 of this Agreement. d. Termination for Non -Compliance with Agreement or Resignation Requests. In the event the Board refuses, following written notice, to comply with any provisions of this Agreement benefiting the County Attorney, or if the County Attorney resigns (not for cause) following a request, either formal or informal, by a majority of the Board that the County Attorney resign, then in that event, the County Attorney may, at the County Attorney's option, be deemed to be terminated at the date of such refusal or suggestion, and the provisions of paragraph "c" above with regards to compensations shall apply. e. Termination for Disability. Sickness. If the County Attorney is disabled or is otherwise unable to perform his/her duties because of sickness, accident, injury, mental or physical incapacity or health, the Board shall have the option to terminate this Agreement effective on the date of written notice thereof without regard to any other notice provisions in this Agreement, and the County Attorney shall be entitled to leave and disability benefits applicable to full-time County employees. Section 4. Voluntary Resignation. The County Attorney may terminate this Agreement by giving written notice at least three months prior to the effective date of said resignation. The County Attorney shall be entitled to receive all compensation payable under this Agreement up to and including the effective date of said resignation, and leave accruals, as listed in Section 7 of this Agreement. Upon voluntary resignation the County Attorney waives any claim to compensation for the remainder of the term of this Agreement. The Board may, in its sole discretion, waive any or this entire three months' notice requirement. Section 5. Salary. a. The annual base salary of the County Attorney beginning December 1, 2015 shall be $145,000 to be paid in accordance with the standard policy of the Board governing payment of professional staff members in the Roanoke County government. b. The Board agrees to award the County Attorney in July of each fiscal year cost of living increases, or average compensation adjustment, if any, in the same amount as awarded to Roanoke County employees generally, based upon an annual performance review performed before the end of each fiscal year. c. In addition to increases as provided in b. above, the annual salary of the County Attorney shall be increased beginning December 1, 2016, by the sum of $5,000, and Page 3 of 7 beginning December 1, 2017, by the sum of $5,000 during the remaining term of this Agreement. d. In addition to a salary increase, the Board may provide a bonus to the County Attorney based on his/her annual performance review. Any adjustments for subsequent years during the term of this Agreement shall be in writing and shall be in the form of an amendment or addendum except for the above-mentioned cost of living increases as provided in b. above, and the two annual increases as provided in c. above. Section 6. Cellular Telephone Allowance. The County will furnish the County Attorney with a PDA/cellular telephone and service for business use. Personal use of this PDA/cell phone shall be kept to a minimum. Section 7. Flexible Leave. The County Attorney shall receive flexible leave as provided to all other County employees, and he shall accumulate flexible leave hours based upon ten years of service (26 days annual accumulation, 8 hours bi-weekly accumulation). Section 8. Hours of Work. The County Attorney is expected to observe office hours similar to those of other administration employees. It is recognized that the County Attorney will frequently be required to work beyond normal office hours for night or weekend meetings and related duties. In recognition of the fact that the County Attorney is expected to devote a significant amount of time outside of normal office hours to the business of Roanoke County, the County Attorney may, to the extent that his/her duties permit, take reasonable discretion in varying observance of office hours; however, no accumulation of compensatory time or monetary compensation is granted. Section 9. Holidays and Other Miscellaneous Benefits. The County Attorney shall be entitled to the same holidays and funeral, military, court, workers' compensation, emergency condition, discretionary and volunteer leave as other fulltime Roanoke County employees. Section 10. Health Insurance. The County shall provide health, dental, and vision insurance coverage and short and long term disability insurance for the County Attorney and his/her dependents as it does for other full-time employees of the County. Section 11. Retirement and Life Insurance. The Board shall pay the employer share of the Virginia Retirement System (VRS) contribution and the total premium for VRS Group Term Life Insurance for the County Attorney. The County Attorney may also choose to enroll in the Deferred Compensation Page 4 of 7 Plan available to other full-time employees of the County. If he/she chooses to enroll in the Deferred Compensation Plan then the County will pay on his/her behalf into such plan $385.00 per 26 pay periods for the term of this Agreement. The County shall also allow for the opportunity to participate in the Optional Life Insurance Program as provided by the Virginia Retirement System. The County does not contribute anything to the monthly premium of the Optional Life Insurance Program. Section 12. Dues. Subscriptions and Professional Development. a. Dues and Subscriptions. The Board agrees to pay a reasonable amount for the professional dues and subscriptions of the County Attorney necessary for his/her continuation and full participation in LGA and other national, state, and local bar associations necessary and desirable for his/her continued professional participation, growth, and advancement and for the good of Roanoke County following approval by the Board of Supervisors any estimated expenses the County Attorney proposes under this Section. b. Professional Development. The Board also agrees to pay the travel and related expenses of the County Attorney for his/her professional development, professional training and education, and to attend necessary official and other functions for the Board and meetings of such other national, regional, state, and local groups, or committees thereof, on which the County Attorney serves as a member, following approval by the Board of any estimate of expenses the County Attorney proposes under this Section, such expenses to include registration fees, travel and subsistence expenses in accordance with Roanoke County travel policies. Such meetings would include the LGA Spring and Fall Conferences, VACo annual conference, and the ICMA annual conference, provided that the expenses therefore are within the total amount budgeted as provided in paragraph "c" of this Section. C. The total available for the expenses set forth in this section shall be set annually by the Board in the operating budget based on and in consideration of the recommendation of the County Attorney and the expenses for dues and subscriptions and professional development in this Section are limited to such annual budgeted amount. Section 13. Residency. The County Attorney shall reside in and be a bona fide resident of Roanoke County during the term of this Agreement. The Board agrees that the County Attorney may take up to twenty-four months to relocate his/her residence to Roanoke County, which date will be December 1, 2017. Failure to relocate in the time provided in this Section shall be good and sufficient cause to terminate this Agreement and in that event, the Board shall have no obligation to pay the remainder of the compensation provided in paragraph "c" of Section 3 of this Agreement. Notwithstanding the foregoing, the Board may extend this period for good cause. Page 5 of 7 Section 14. Outside Employment or Activities. The County Attorney may, with prior approval of the Board, undertake consultative work, speaking engagements, writing, lecturing, or other professional activities for compensation so long as such activities do not interfere with the duties required under this Agreement. Section 15. Evaluation. The Board shall review and evaluate the performance of the County Attorney at least once annually before July 1St. This review shall be in accordance with specific criteria developed by the Board and the County Attorney. This criteria can be amended from time to time based on changes to the expectations of the Board, after the County Attorney has been informed of the proposed changes. Further, the Board shall provide the County Attorney with a summary written statement of the evaluation and provide the opportunity for the County Attorney to discuss this evaluation with the Board. Section 16. Relocation Allowance. The Board agrees to provide the County Attorney a one-time relocation allowance of $10,000. This allowance shall be paid to the County Attorney upon his/her relocation to the County. Section 17. General Provisions. a. The Board agrees to provide insurance or self-insurance coverage in matters relating to the County Attorney's official duties within the scope of employment, and legal counsel for the County Administrator as is provided to all Roanoke County employees generally in accordance with the Code of Virginia. b. This Agreement is expressly subject to the laws of the Commonwealth of Virginia and the regulations of Roanoke County. C. The obligations of the County under this Agreement shall be subject to and dependent upon appropriations being made from time to time by the Board of Supervisors of the County for such purpose. Any other provision to the contrary notwithstanding, this Agreement and the obligations herein shall not constitute a debt of the County within the meaning of any limitation on indebtedness of the County under any constitutional or statutory limitation and nothing in this Agreement shall constitute a pledge of the full faith and credit of the County under any provision of its Charter, as applicable, or the Constitution of Virginia. The failure of the governing body of the County to appropriate funds in any year for payment in full of the payments required by the Agreement during such year shall terminate this Agreement without any further liability on the part of the County off any kind, thirty (30) days after the Board of Supervisors of the County makes a Page 6 of 7 final determination not to appropriate funds for this Agreement for the current fiscal year, unless the County provides appropriations for similar purposes or services. d. This Agreement constitutes the entire agreement between the Board and the County Attorney and may be amended only by written agreement executed by them. If any provision of this Agreement is held to be unconstitutional, invalid or unenforceable, the remainder of the Agreement shall be severable and shall remain in full force and effect. IN WITNESS WHEREOF, the Roanoke County Board of Supervisors has caused this Agreement to be executed on its behalf by its Chair in accordance with action authorizing such execution on 2015 and the County Attorney has executed this Agreement, both in duplicate this date. Executed this day of 2015. Attest: Chief Deputy Clerk Approved as to form: Paul M. Mahoney, County Attorney Page 7 of 7 BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA P. Jason Peters, Chairman Candidate ACTION NO. ITEM NO. Q-1 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance amending Chapter 5 "Animals and Fowl" of the Roanoke County Code to amend standards for residential chicken keeping SUBMITTED BY: Philip Thompson Deputy Director of Planning APPROVED BY: Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: This is the second reading of an ordinance to amend the standards for residential chicken keeping. The first reading was held on September 8, 2015. In August 2012, the Board of Supervisors amended Chapter 5 "Animals and Fowl" of the County Code to add definitions and standards for residential chicken keeping. Currently, the keeping of up to six (6) female chickens is allowed in residentially zoned areas with certain conditions. Over the past year, staff has received requests from citizens wanting to keep more than six (6) female chickens. The Planning Commission reviewed the existing regulations and visited several sites in the County regarding this issue. The attached ordinance amends Chapter 5 "Animals and Fowl" by revising the standards for residential chicken keeping. The number of chickens that could be kept would be based on the lot size as follows: Lot Size Maximum # of Female Chickens Up to 20,000 square feet 6 20,001 square feet to 1 acre 9 Greater than 1 acre 12 Page 1 of 2 FISCAL IMPACT: None ALTERNATIVES: 1. Approve the ordinance that amends Chapter 5 "Animals and Fowl." 2. Take no action at this time. STAFF RECOMMENDATION: Staff recommends Alternative 1. Page 2 of 2 Proposed Amendments to Chapter 5 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AMENDING CHAPTER 5 "ANIMALS AND FOWL" OF THE ROANOKE COUNTY CODE TO AMEND STANDARDS FOR RESIDENTIAL CHICKEN KEEPING WHEREAS, Ordinance 082812-7 adopted by the Board of Supervisors on August 28, 2012, established standards for residential chicken keeping; and WHEREAS, after staff review the following amendments are recommended to the standards; and WHEREAS, the first reading of this ordinance was held on September 8, 2015, and the second reading and public hearing was held on September 22, 2015; and WHEREAS, public necessity, convenience and general welfare are valid public purposes for such recommendations and action by the Board of Supervisors; and NOW, THEREFORE, BE IT ORDAINED by the Board of Supervisors of Roanoke County, Virginia, as follows: 1. That the Roanoke County Code be amended to read and provide as follows: CHAPTER 5 —ANIMALS AND FOWL ARTICLE II — DOGS, CATS AND OTHER ANIMALS DIVISION 1 - GENERALLY Sec. 5-38. Standards for residential chicken keeping. The keeping of female chickens (hens) shall be permitted in non - agriculturally zoned areas of the county subject to the following standards: Page 1 of 3 Note: Text additions are in red font. Text deletions are in red font and struck through. Proposed Amendments to Chapter S (1) The principal use of the property is a single-family dwelling. (2) The owner of the chickens must reside on the property on which the chickens are kept. (3) Chickens shall be kept within a predator -resistant coop or chicken enclosure at all times and shall not be permitted to run at large. (4) Coops and chicken enclosures shall be setback at least ten (10) feet from side and rear property lines and at least thirty-five (35) feet from any residential dwelling on an adjacent lot. Coops and chicken enclosures shall also be located behind the front building line of the principal structure. (5) Coops shall provide at least two (2) square feet of interior space per chicken and chicken enclosures shall provide at least ten (10) square feet of exterior space per chicken with a maximum total area of e two hundred fifty (4250) square feet for both the coop and chicken enclosure. Neither the coop nor chicken enclosure shall exceed ten (10) feet in height. (6) Coops and chicken enclosures shall be securely constructed, well -ventilated and kept in a clean, dry and sanitary condition at all times. (7) Provision shall be made for the storage and removal of chicken waste (manure). Such waste shall not create a nuisance or health hazard to adjoining property owners. (8) All chicken feed or other material intended for consumption by chickens shall be kept in containers impenetrable by rodents, insects or predators. (9) The keeping of roosters, capons, and crowing hens is prohibited. (10) The outdoor slaughtering of chickens is prohibited. (11) The maximum number of female chickens (hens) that may be kept shall be as follows.. Lot Size Maximum Number of Female Chickens (Hens) 20,000 square feet or less 6 20,001 square feet to 1.0 acre 9 Greater than 1.0 acre 12 Page 2 of 3 Note: Text additions are in red font. Text deletions are in red font and struck through. Proposed Amendments to Chapter S 2. That this ordinance shall be in full force and effect from and after its adoption. Page 3 of 3 Note: Text additions are in red font. Text deletions are in red font and struck through. ACTION NO. ITEM NO. Q-2 AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER MEETING DATE: September 22, 2015 AGENDA ITEM: Ordinance amending Article II (Definitions and Use Types), Article III (District Regulations), and Article IV (Use and Design Standards) of the Roanoke County Zoning Ordinance SUBMITTED BY: APPROVED BY: Philip Thompson Deputy Director of Planning Thomas C. Gates County Administrator COUNTY ADMINISTRATOR'S COMMENTS: SUMMARY OF INFORMATION: Community Development staff continually works with the Planning Commission on reviewing the County's development regulations and recommending amendments when appropriate. Amendments are proposed for Article I I (Definitions and Use Types), Article III (District Regulations), and Article IV (Use and Design Standards) of the Roanoke County Zoning Ordinance. The proposed amendments would: amend the definition of personal improvement services; amend the permitted uses and uses allowed by special use permit in the R-2 (Medium Density Residential), 1-1 (Low Intensity Industrial), and 1-2 (High Intensity Industrial) zoning districts; and it would amend the use and design standards for private stable, accessory apartments, multi -family dwelling, two family dwelling, agricultural services, bed and breakfast, and accessory uses for residential use types (residential chicken keeping). The Planning Commission held a public hearing on these amendments on August 18, 2015. No citizens spoke during the public hearing. The Planning Commission recommended approval of the proposed amendments by a vote of 5-0. This is the second reading of the ordinance; the first reading was held on September 8, 2015. Page 1 of 2 FISCAL IMPACT: h re Me - ALTERNATIVES: Approve the ordinance that amends Article 11 (Definitions and Use Types), Article III (District Regulations), and Article IV (Use and Design Standards) of the Roanoke County Zoning Ordinance. 2. Take no action at this time. STAFF RECOMMENDATION: Staff recommends Alternative 1. Page 2 of 2 c v E c a, E a, U c m c =a L O Oo C p N F - LL P h U U N Q cu O t O v U Q L Y Ln v c v v Ca U c N co C Q N O Z v U U_ N > Q L Ln N fC Ln O N c ba * N Q co N f6 s Nom* J vv N V L U 'a N � v * O N to C C 2 N 3 v v N o > p 0 N * 4' N N N U L � Q N ++ N +J +� U O U Z o o ; PC Recommended -August 18, 2015 DRAFT- Subject to Change Permitted Use Table R - Uses Permitted By Right S - Special Use `- Use and Design Standards (Article IV) Bed and breakfast Boarding house Business or trade schools Commercial outdoor sports and recreation Construction sales and services R NEW. Hotel / motel motor lodge ON Personal improve ant services Recreational vehicle sales and service 29 R - Uses Permitted By Right S - Special Use `- Use and Design Standards (Article IV) Use Type Definitions Sec. 30-29-4. Office Use Types. Medical office: Use of a site for facilities which provide diagnoses, minor surgical care and outpatient care on a routine basis, but which does not provide overnight care or serve as a base for an ambulance service. Medical offices are operated by doctors, dentists, or similar practitioners licensed by the Commonwealth of Virginia. Sec. 30-29-5. Commercial Use Types. Agricultural services: An establishment primarily engaged in providing services specifically for the agricultural community which is not directly associated with a farm operation. Included in this use type would be servicing of agricultural equipment, independent equipment operators, and other related agricultural services. Automobile dealership: The use of any building, land area or other premise for the display of new and/or used automobiles, trucks, vans, scooters, recreational vehicles or motorcycles for sale or rent, including any warranty repair work and other major and minor repair service conducted as an accessory use. Automobile rental/leasing: Rental of automobiles and light trucks and vans, including incidental parking and servicing of vehicles for rent or lease. Typical uses include auto rental agencies and taxicab dispatch areas. Automobile repair services, minor: Repair of automobiles, noncommercial trucks, motorcycles, motor homes, recreational vehicles, or boats, including the sale, installation, and servicing of equipment and parts. Typical uses include tire sales and installation, wheel and brake shops, oil and lubrication services and similar repair and service activities where minor repairs and routine maintenance are conducted. Automobile parts/supply, retail: Retail sales of automobile parts and accessories. Typical uses include automobile parts and supply stores which offer new and factory rebuilt parts and accessories, and include establishments which offer minor automobile repair services. Bed and breakfast: A dwelling in which not more than five (5) bedrooms are provided for overnight guests for compensation, on daily or weekly basis, with or without meals. Communications services: Establishments primarily engaged in the provision of broadcasting and other information relay services accomplished through the use of electronic and telephonic mechanisms. Excluded from this use type are facilities classified as major utility services or broadcasting towers. Typical uses include television studios, telecommunication service centers, telegraph service offices or film and sound recording facilities. Construction sales and services: Establishments or places of business primarily engaged in retail or wholesale sale, from the premises, of materials used in the construction of buildings or other structures, but specifically excluding automobile or equipment supplies otherwise classified herein. Typical uses include building material stores and home supply establishments. Use Type Definitions Consumer repair services: Establishments primarily engaged in the provision of repair services to individuals and households, rather than businesses, but excluding automotive and equipment repair use types. Typical uses include appliance repair shops, shoe repair, watch or jewelry repair shops, or repair of musical instruments. Convenience store: Establishments primarily engaged in the provision of frequently or recurrently needed goods for household consumption, such as prepackaged or prepared food and beverages, and limited household supplies and hardware. This use may include fuel pumps and/or the selling of fuel for motor vehicles. Typical uses include neighborhood markets and country stores. Equipment sales and rental: Establishments primarily engaged in the sale or rental of tools, trucks, tractors, construction equipment, agricultural implements, and similar industrial equipment, and the rental of mobile homes. Included in this use type is the incidental storage, maintenance, and servicing of such equipment. Fuel center: Any building, structure, or land used for the dispensing, sale or offering for sale at retail of any vehicle fuels, oils or accessories. This use can be a standalone business or accessory to another business. Garden center: Establishments or places of business primarily engaged in retail or wholesale (bulk) sale, from the premises, of trees, shrubs, seeds, fertilizers, pesticides, plants and plant materials primarily for agricultural, residential and commercial consumers. Such establishments typically sell products purchased from others, but may sell some material which they grow themselves. Typical uses include nurseries, plant stores and lawn and garden centers. Gasoline station: Any place of business with fuel pumps and underground storage tanks which provides minor automobile repair and fuels and oil for motor vehicles. Manufactured home sales: Establishments primarily engaged in the display, retail sale, rental, and minor repair of new and used manufactured homes, parts, and equipment. Personal improvement services: Establishments primarily engaged in the provision of informational, instructional, personal improvements and similar services. Typical uses include driving schools, health or physical fitness studios, reducing salons, dance studios, handicraft and hobby instruction. Recreational vehicle sales and service: Retail sales of recreational vehicles and boats, including service and storage of vehicles and parts and related accessories. Veterinary hospital/clinic: Any establishment rendering surgical and medical treatment of animals. Boarding of animals shall only be conducted indoors, on a short term basis, and shall only be incidental to such hospital/clinic use, unless also authorized and approved as a commercial kennel. AT A REGULAR MEETING OF THE BOARD OF SUPERVISORS OF ROANOKE COUNTY, VIRGINIA HELD AT THE ROANOKE COUNTY ADMINISTRATION CENTER ON TUESDAY, SEPTEMBER 22, 2015 ORDINANCE AMENDING ARTICLE II (DEFINITIONS AND USE TYPES), ARTICLE III (DISTRICT REGULATIONS), AND ARTICLE IV (USE AND DESIGN STANDARDS) OF THE ROANOKE COUNTY ZONING ORDINANCE WHEREAS, beginning in January of 2013, the Planning Commission and Community Development staff identified several areas of the zoning ordinance to review and update resulting in the proposal of amendments to the Roanoke County Zoning Ordinance; and WHEREAS, on August 18, 2015, after proper notice, the Roanoke County Planning Commission held a public hearing on various amendments to the Zoning Ordinance and recommended said amendments to the Board of Supervisors for adoption; and WHEREAS, public necessity, convenience, general welfare and good zoning practice are valid public purposes for such recommendations by the Planning Commission and action by the Board of Supervisors; and, WHEREAS, the first reading of this ordinance was held on September 8, 2015, and the second reading and public hearing was held on September 22, 2015. NOW THEREFORE BE IT ORDAINED by the Board of Supervisors of Roanoke County as follows: 1. That the Zoning Ordinance is hereby amended to read and provide as follows: Page 1 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. ROANOKE COUNTY CODE APPENDIX A — ZONING ORDINANCE ARTICLE II — DEFINITIONS AND USE TYPES SEC. 30-29. USE TYPES; GENERALLY. Sec. 30-29-5. Commercial Use Types. Personal improvement services: Establishments primarily engaged in the provision of informational, instructional, personal improvements and similar services. Typical uses include driving schools, health or physical fitness studios and centers, reducing salons, dance studios, handicraft and hobby instruction. ARTICLE III — DISTRICT REGULATIONS SEC. 30-42. R-2 MEDIUM DENSITY RESIDENTIAL DISTRICT. Sec. 30-42-2. Permitted Uses. (A) The following uses are permitted by right subject to all other applicable requirements contained in this ordinance. An asterisk (*) indicates additional, modified or more stringent standards as listed in article IV, use and design standards, for those specific uses. 3. Commercial Uses Bed and Breakfast * =34. Miscellaneous Uses SEC. 30-61. I-1 LOW INTENSITY INDUSTRIAL DISTRICT. Sec. 30-61-2. Permitted Uses. (A) The following uses are permitted by right subject to all other applicable requirements contained in this ordinance. An asterisk (*) indicates additional, modified or more stringent standards as listed in article IV, use and design standards, for those specific uses. Office Uses Medical Office Page 2 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. 4. Commercial Uses Agricultural Services * Automobile Repair Services, Minor Automobile Parts / Supply, Retail * Communication Services Construction Sales and Services * Consumer Repair Services Garden Center * Personal Improvement Services Veterinary Hospital / Clinic (B) The following uses are allowed only by special use permit pursuant to section 30-19. An asterisk (*) indicates additional, modified or more stringent standards as listed in article IV, use and design standards, for those specific uses. 1. Commercial Uses Automobile Dealership * Automobile Rental / Leasing Convenience Store * Fuel Center * Gasoline Station * Manufactured Home Sales * Recreational Vehicle Sales and Service * SEC. 30-62. I-2 HIGH INTENSITY INDUSTRIAL DISTRICT. Sec. 30-62-2. Permitted Uses. Page 3 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. (A) The following uses are permitted by right subject to all other applicable requirements contained in this ordinance. An asterisk (*) indicates additional, modified or more stringent standards as listed in article IV, use and design standards, for those specific uses. 3. Office Uses Medical Office 4. Commercial Uses Personal Improvement Services ARTICLE IV — USE AND DESIGN STANDARDS SEC. 30-81. AGRICULTURAL AND FORESTRY USES. Sec. 30-81-5. Stable, Private. (A) General standards: 2. �. A shelter shall be required for the keeping of a horse or pony. No more than one (1) horse or pony shall be permitted for every two (2) fenced acres . 4. Stables, corrals, and other confined areas shall be setback at least fifty (50) feet from any property line. For the purpose of this section, perimeter fencing of a yard shall not be considered a confined area. All confined areas and fencing shall be securely constructed. 6. A plot plan shall be required showing the location of , all structures and the location and type of fencing, SEC. 30-82. RESIDENTIAL USES. Sec. 30-82-1. Accessory Apartments. (B) General standards: 2. An accessory apartment may be located in an accessory structure th-a', `'.- on the lot provided: Page 4 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. a. The parcel meets the minimum lot size requirement of the zoning district it is located in. b. The accessory building shall comply with all applicable zoning requirements for a principal building. If these standards cannot be met, the applicant shall obtain a special use permit to locate an accessory apartment in an accessory structure. 3. Maximum floor area: Upon completion of the construction, the accessory apartment shall not contain more than fifty (50) percent of the finished floor area of the principal dwelling unit located on the same lot, but in no case shall the accessory apartment exceed one thousand five hundred (1,0500) square feet. (RC) General standards in the C-1 and C-2 districts, independent of the general standards above: 1. The accessory apartment shall be allowed in conjunction with, it asso@tatp, a civic, office or commercial use type. Page 5 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. 2. The civic, office or commercial use type must occupy at least fifty (50) percent of the gross floor area on the site. Sec. 30-82-11. Multi -family Dwelling. (F) General standards in the C-1 and C-2 districts, independent of the general standards above: The multi -family use shall be allowed in conjunction with, a~ RSS@ iR a a civic, office or commercial use type. 2. The multi -family use may account for up to fifty (50) percent of the gross floor area Of04m; on the site. A special use permit shall be required if the multi -family use accounts for more than fifty (50) percent of the gross floor area on the site. Sec. 30-82-15. Two-family Dwelling. (C) General standards in the C-1 and C-2 district: The two-family dwelling use shall be allowed in conjunction with, *~ l+#, * +�a a civic, office or commercial use type. 2. The two-family dwelling use may account for up to fifty (50) percent of the gross floor area on the site. A special use permit shall be required if the two-family use accounts for more than fifty (50) percent of the gross floor area on the site. SEC. 30-85. COMMERCIAL USES. Sec. 30-85-1. Agricultural Services. (B) In the C-1, w44 C-2, and I-1 districts any outdoor storage area for agricultural equipment awaiting repair shall be placed in a storage yard. The storage yard shall be fully screened from public view and shall be set back at least one hundred (100) feet from any adjoining residential district. Sec. 30-85-8. Bed and Breakfast. (A) General standards: (B) In the R -I and R-2 zoning districts, the following additional standards shall apply: Page 6 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. One (1) guest sleeping room or accommodation shall be allowed as a by -right use provided the maximum number of guest occupants shall not exceed four (4) guests. 2. For two (2) or more guest sleeping rooms, a special use permit shall be required on lots less than five (5) acres. Lots that are five (5) acres or greater in size, a bed and breakfast shall be considered a by -right use. SEC. 30-88. ACCESSORY USES AND STRUCTURES. Sec. 30-88-2. Accessory Uses: Residential Use Types. (A) Residential use types may include the following accessory uses, activities or structures on the same site or lot: 10. Residential chicken keeping including coops and chicken enclosures provided that: (b) Coops shall provide at least two (2) square feet of interior space per chicken and chicken enclosures shall provide at least ten (10) square feet of exterior space per chicken with a maximum total area of two hundred fifty 0250) square feet for both the coop and chicken enclosure. Neither the coop nor chicken enclosure shall exceed ten (10) feet in height. Page 7 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through. adoption. That this ordinance shall be in full force and effect from and after its Page 8 of 8 Note: Text additions are in red font. Text deletions are in red font and struck through.