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HomeMy WebLinkAboutSW7080906_CURRENT PERMIT_20210809STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SWOGI�o DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD t414A ROY COOPER Governor ELIZABETH S. BISER Secretary BRIAN WRENN Director NORTH CAROLINA Environment¢! Quality August 9, 2021 Pirates Cove Homeowners Association Attn: Mr. Andy Gay 1 Sailfish Drive Manteo, NC 27954 Subject: Stormwater Permit No. SW7080906 Pirates Cove - Sailfish Villas High Density Stormwater Project Dare County Dear Mr. Gay: The Washington Regional Office received your request to renew the state stormwater permit for the subject project on July 19, 2021. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SV 7080906 dated August 9, 2021 for the subject project. This permit replaces all previous stormwater permits for this project, and shall be effective from the date of issuance until August 9, 2029, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit and in the submitted application. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result In future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611- 7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact this office at (252) 946-6481. Cc: WARO Ec: rparrish(aDpirates-cove.com Sincerely, Samir Dumpor, PE I Regional Engineer V— ® North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources Washington Regional Office 1 933 Washington Square Mall i Washington, North Carolina 27881) °^'"n^na u..e.muouur 282.946.6481 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Pirates Cove Homeowners Association Pirates Cove - Sailfish Villas Dare County FOR THE construction, operation and maintenance of a stormwater system consisting of permeable pavement sections, in combination with infiltration trenches, and subsurface infiltration storm chambers, in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy Mineral and Land Resources and considered a part of this permit. This permit replaces all previous stormwater permits for this project, and shall be effective from the date of issuance until August 9, 2029, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 4 of this permit. The stormwater controls have been designed to handle 21,039 sf of building roof tops, and 19,196 sf of permeable asphalt parking areas. Based on design, the permeable pavement sections have been given a 53 % credit, yielding a net 8985 sf of impervious area. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans and permit. 4. The tract will be limited to the amount of built -upon area indicated on page 4 of this permit, and per approved plans. The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the permitted stormwater control system. The following design criteria have been provided for the infiltration basins and must be maintained at design condition: Total Site Area: Built Upon Areas: rooftops permeable asphalt C. Design Storm: d. TSS removal efficiency. e. Total Storage Volume for Infiltration Storm Chamber/Trench Systems: (1290 cf for each system) f. Total Storage Volumes for Infiltration Swales: Receiving Stream/River Basin Classification of Water Body:. II. SCHEDULE OF COMPLIANCE 1.42 acres 21,039 sf 19,196 sf 1.5 - inch 85 % 3870 cf 1139 cf Pirates Cove Marina Basin tributary to Roanoke Sound SC 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plans must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. Debris removal and unclogging of bypass structure, filter media, flow spreader, catch basins, piping and vegetated filter. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of the Division. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11 A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. This permit shall be effective from the date of issuance until August 9, 2029. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division, in accordance with North Carolina General Statute 143-215.6A to 143- 215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants Division staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 9 th day of August 2021. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Brian Wrenn, Director Division of Energy Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW7080906 Stormwater Permit No. SW7080906 Pirates Cove - Sailfish Villas Infiltration Storm Chambers, Permeable Pavement and Infiltration Trenches Designer's Certification I, as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. Note: The checklist on the following page must be included with this Certification. Any changes or deviations from the approved plans and specifications must be explained in detail and may require a permit modification. The certification forms should be submitted to the Division of Energy Mineral and Land Resources at the Washington Regional office. SEAL Signature Registration Number Date Complete this checklist for each system and include with Certification: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure elevations are per the approved plan 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. Date Received Fee Paid Permit Number S05• p0 0 NC DEQ Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781) Section 60. (c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: 2. Project name: 3. Project street City: _ !lam County: 4. What, if any, changes have been made to the project as permitted? nprw!i If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: httl)s://deg.nc.gov/about/divisions/energv- mineral-land-resources/energy-minera I-land-rules/stormwater-pros ram/post-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at., htti)s://deg.nc.gov/about/divisions/energv-mineral-land- resources/energv-mineral-land-rules/stormwater-program/post-construction. State Stormwater Permits do not automatically transfer with the sale of the property. 1. Current Permit Holder's Company Name/Organization: Pf 0-5 l AvlC, 2. Signing Official's Name 3. Signing Official's Title: 4. Mailing Address: 1 city: Mm4tD 5. Street Address: I City: --RLT1JJII 6. Phone: 262, / I • —X. ZIP: / Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018 C. SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Initial each item below to indicate that the required information is provided in the application package: Nfs� 1. A permit application processing fee of $505.00 payable to NCDEQ. J 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act," c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee, d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. (S._ 4. M Agreements, Please select one: 1 have a copy of the current recorded O&M Agreement for all SCMs, and I will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. •- � 5. Designer Certifications, Please select one: ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed, or ❑ The project has not yet been built. 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). https://www.sosnc.gov/online services/search/by title/ Business Registration Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 D. PERMITTEE'S CERTIFICATION 1, the person legally responsible for the permit, certify that I have a copy of th Permit and O Ag eement on site (or I will obtain a copy and it will be kept on site), that I am responsiblqNr the performance of the maintenance procedures, and the site has been and will be maintained according t e O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built-upohrlarea and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my knowledge, correct and co m late. Signature: Date: NOTARIZATION: 1, 3MIUVI Rhin dq e a Notary Public for the State of Not th (Ut n11A a County of Daft , do hereby certify that — A n A u_NI personally appeared before me this the E �,,,, , 2 day of Jul 20 t and acknowledge the due @ef utl tXMI (going instrument. Witness my hand and official seal, AVA PUBLIC G My commission Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Z. July 12, 2021 NC Department of Environmental Quality 943 Washington Square Mall Washington, NC 27889 SUBJECT: Stormwater Renewal Request To Whom it may concern: Pirate's Cove Homeowners' Association, Inc. requests a stormwater permit renewal to extend the expiration date of the Stormwater Permit #S W7080906. Please find enclosed the application form, documents, and the $505.00 fee for the permit renewal request. If you have any questions or need any additional information, please contact Renee Parrish with property management at rparrish(2apirates-cove.com or 252- 473-4203. Sincerely, 741(ayl A/ �ay Andy W. Gay, President Pirate's Cove Homeowners' Association, Inc. I Sailfish Drive • Manteo, North Carolina 27954 Phone 252/473-6800 • Fax 252/473-4200 rparrish@pirates-cove.com t ® North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary March 16, 2010 Pirates Cove Homeowners Association Attn: Mr. Brian White• ' 1 Sailfish Point Manteo, NC 27954 Subject: Stormwater Permit No. SW7080906 Pirates Cove - Sailfish Villas High Density Stormwater Project Dare County Dear Mr. White: The Washington Regional Office received your request for a Name/Ownership change for the subject project. Staff review of the plans,and specifications has 1 determined that the project, as proposed, will comply with the Stormwater ®.- Regulations set forth in Title 15A NCAC 21-1.1000. We are forwarding; Permit No. SW7080906 dated March 16, 2010 for the subject project. This permit replaces all previous stormwater permits for this project, and shall be effective from the date of issuance until March 16, 2020, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit and in the submitted application. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 950B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. ^ North Carolina Division of Water Quality Internet www.ncwateroualiN.ore l 943 Washington Square Mall Phone: 252-946.6481 One Washington, NC 27889 FAX 252-946-9215 NorhCaroina An Equal Opportunity/Affirmative ;�yatffra//J Page 3 of 9 401 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Pirates Cove Homeowners Association Pirates Cove - Sailfish Villas Dare County FOR THE construction, operation and maintenance of a stormwater system consisting of permeable pavement sections, in combination with infiltration trenches, and subsurface infiltration storm chambers, in compliance with the provisions of 16A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit replaces all previous stormwater permits for this project,.and shall be effective from the date of issuance until March 16, 2020, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 4 of this permit. The stormwater controls have been designed to handle 21,039 sf of building rooftops, and 119,196 sf of permeable asphalt parking areas. Based on design, the permeable pavement sections have been given a 53.% credit, yielding a net 8985 sf of impervious area. 1 3. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the Page 5 of 9 00 d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, filter media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ: The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the' approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. Q� 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. Page 7 of 9 7. Unless specified elsewhere, permanent seeding requirements for the ® stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 9. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 16 th day of March, 2010. CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION " WWIM'Q, v11MAVI Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7080906 r-. Page 9 of 9 Complete this checklist for each system and include with Certification: 1 • The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4• All roof drains are located such that the runoff is directed into the system. 5• The bypass structure elevations are per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. cliA. NC®ENK North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary July 27, 2009 Roanoke Properties Attn: Mr. Glenn Futrell 1 Sailfish Point see 5tJ763o%o4 155 3�/G/2o/o Manteo, NC 27954 Subject: Stormwater Permit No. SW7080906 Pirates Cove - Sailfish Villas High Density Stormwater Project Dare County Dear Mr. Futrell: The Washington Regional Office received your complete Stormwater Management Permit application on May 20, 2009. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7080906 dated July 27, 2009 for the subject project. This permit shall be effective from the date of issuance until July 27, 2019, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit and in the submitted application. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. North Carol inn Division or Walcr Quality Internet: www.newmcrgualitv.ore 943 Washington Square Mall Phone: 252-946-6481 Washington, NC 27889 FAX 252-946-9215 An Equal OpportunitylAffirmative Action Employer— 50% Recycled110% Post Consumer Paper None rrthCarojina Naturally Page 2 of 9 Roanoke Properties July 27, 2009 Page Two If you have any questions, or need additional information concerning this matter, please contact either Bill Moore, or me at (252) 946-6481. kincerely, Al Hodge �y�--_- Regional Supervisor Surface Water Protection Section cc: Bissell Professional Group Dare County Planning/Inspections Washington Regional Office Central Files Page 3 of 9 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Roanoke Properties Pirates Cove - Sailfish Villas Dare County FOR THE construction, operation and maintenance of a stormwater system consisting of permeable pavement sections, in combination with infiltration trenches, and subsurface infiltration storm chambers, in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until July 27, 2019, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 4 of this permit. The stormwater controls have been designed to handle 21,039 sf of building roof tops, and 19,196 sf of permeable asphalt parking areas. Based on design, the permeable pavement sections have been given a 53 % credit, yielding a net 8985 sf of impervious area. 3. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans and permit. Page 4 of 9 13 5. The tract will be limited to the amount of built -upon area indicated on page 4 of this permit, and per approved plans. The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the permitted stormwater control system. The following design criteria have been provided for the infiltration basins and must be maintained at design condition: a. Total Site Area: 1.42 acres b. Total Impervious Surfaces: roof tops 21,039 sf permeable asphalt 19,196 sf C. Design Storm: 1.5 - inch d. TSS removal efficiency: 85 % e. Total Storage Volume for Infiltration Storm Chamber/Trench Systems: 3870 cf (1290 cf for each system) f. Total Storage Volumes for Infiltration Swales: 1139 cf g. Receiving Stream/River Basin: Pirates Cove Marina Basin tributary to Roanoke Sound h. Classification of Water Body: Sc II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plans must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. Page 5 of 9 e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, filter media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to. those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. Page 6 of 9 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 13. This permit shall be effective from the date of issuance until July 27, 2019. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. �f Page 7 of 9 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 9. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 27 th day of July, 2009. TH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION — . 1, .for Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7080906 Page 8 of 9 Stormwater Permit No. SW7080906 Pirates Cove - Sailfish Villas Infiltration Storm Chambers, Permeable Pavement and Infiltration Trenches Designer's Certification I, as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. Note: The checklist on the following page must be included with this Certification. Any changes or deviations from the approved plans and specifications must be explained in detail, and may require a permit modification. The certification forms should be submitted to the Division of Water Quality at the appropriate Regional office. SEAL Signature Registration Number Date Page 9 of 9 Complete this checklist for each system and include with Certification: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure elevations are per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. Permit (to be provided by DWQ) ® � �p WATFgO- NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM o�C 401 CERTIFICATION APPLICATION FORM INFILTRATION TRENCH SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Project name lPirate's Cove Tournament Pavilion Contact person [Glenn Futrell Phone number 1252476-6800 Date (5/1412009 Drainage area number #1A (Parking Area for Building', I1.7DESIGMINF,ORWION Site Characteristics Drainage area 5,952.00 rye r ng Impervious area 2,786.00 ry Percent impervious 46.8% Design rainfall depth 1.5 in MAY 2 0 2009 Peak Flow Calculations Is pre/post control of the 1-yr 24-hr peak flow required? 1-yr, 24-hr runoff depth 1-yr, 24-hr intensity Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Storage Volume: Non -SR Waters Minimum volume required Volume provided Storage Volume: SR Waters 1-yr, 24-hr rainfall depth Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Soils Report Summary Soil type Infiltration rate SHWT elevation Trench Design Parameters Drawdown time Chamber pipe diameter Chamber pipe length Stone type (if used) Stone void ratio Stone is free of fines? Trench Elevations Bottom elevation Storage/overflow elevation Top elevation I N (Y or N) I N/A in I N/A in/hr I N/A ft3/sec N/A ft�/sec N/A ft'/sec I N/A ft3 N/A ft3 N/A in I N/A rya N/A rya 351 rya 352 W OK for non -SR waters (47% of parking lot runoff received) Ps- Psamments 1 1.00 in/hr (Conservative Estimate) 0.50 fmsl (Based upon supporting data) 0.5 days OK 0 in 0 it washed 40 Y (Y or N) (estimated less than 10%) 3.50 fmsl (From bottom of gravel storage area) 6.50 fmsl (minimum overflow berm finished grade) 6.00 fmsl (top of trench elevation) Form SW401-Infiltration Trench-Rev.1 Parts I. & II. Design Summary, Page 1 of 2 Permit Trench Dimensions Length (long dimension) Width (short dimension) Height (depth) Additional Information Total runoff volume captured by trench (max storage) Length of vegetative filter for overflow Number of observation wells Distance to structure Distance from surface waters Distance from water supply well(s) Separation from impervious soil layer Naturally occuring soil above SHWT Bottom covered with 4-in of clean sand? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Bypass provided for larger storms? Trench wrapped with geotextile fabric? Pretreatment device provided 201 ft 1.75 ft 2.5 ft 0.10 ac-in 30 1 ft 15 ft 40 ft+ i 100 ft+ 4 ft+ 1 it+ ( Y (Y or N) Y (YorN) Y (Y or N) Y (Y or N) i Y (YorN) i N OK OK OK OK OK for non -SA waters OK OK OK OK OK OK (Overflow berm is provided) via (to be provided by DWO) Form SW401-Infiltration Trench-Rev.1 Parts I. & 11. Design Summary, Page 2 of 2 Permit (to be provided by DWO) III :REQUIRED.:REMSCHECKL'ISTr,,,-,; fir. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials bAM Sheet No. _� 1. Plans (1" - 50' or larger) of the entire site showing: MAY 2 O 2009 - Design at ultimate build -out, - OH -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Trench dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Overflow device, and 2 - Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing: - Bypass structure, - Maintenance access, - Basin bottom dimensions, - Basin cross-section with benchmark for sediment cleanout, - Flow distribution detail for inflow, - Vegetated filter, and Drw2 �f - Pretreatment device. 3. Section view of the infiltration basin (1" = 20' or larger) showing: Pretreatment and treatment areas, and �PA 2 Inlet and outlet structures. 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. DMR C- - 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils >rN� investigation request form. County soil maps are not an acceptable source of soils information. ly—AR 6. An assurance that the installed system will meet design specifications upon initial operation once the DM �f ` project is complete and the entire drainage area is stabilized. 7. A construction sequence that shows how the infiltration basin will be protected from sediment until the entire drainage area is stabilized. DM�z EX 3 8. The supporting calculations. �µrC pg�a,r•s-J� y 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement. 10. A copy of the deed restriction. Dote kvc-orwe - 1698,P D.G 43l be 2b Form SW401-Infiltration Trench-Rev.1 Part III. Required Items Checklist, Page 1 of 1 Pernil No. Ito be provided by DWQ) STORMWATER MANAGEMENT PERMIT APPLICATION FORM No 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information. contact Person Phone Number Date Drainage Area I Lot Number Lot Owners Signature II. DESIGN INFORMATION Soils Report Summary Sal type Infiltration rate SHWf elevation Credit Calculation- Enter art Y in the appropriate cell below Within 1/2 mile of & draining to SA waters? Permeable concrete without a gravel base Permeable concrete with at least It'gravel base Flexible pavements with at least 6' gravel base (interpolated) Flexible pavements with at least 7' gravel base Bogen eWWn of the permeable pavement cross-section SA of permeable pavement being proposed Resulting BUA counted as impervious Additional Information Slope of permeable pavement Construction sequence minimizes compaction to soils? Traffic volume (vehicles per day) Washed stole is specified for the gravel layer IN used)? Concetraled flow from roofs & other surfaces directed away? Additional Information for Residential Lots Only Total BUA allocated to this lot Remaining lot BUA available Glenn Futrell 252473-4201 Ps-Psamments 1.00 inrnr Conservative rate utilized 0.50 fmsl N YIN Managed Grass Factor. x 0.532 5.53 fmsl OK 5,952.00 to 2,785.54 it' 0.50 % OK Y YIN OK 19.00 vlday OK Y YIN OK Y YIN OK NIA fie NIA l Application ADPre;adE J Application Re Reason for rejecting apprication: Signature of permitiee I HOA Data O Form SW401-Permeable Pavement-Rev.1 Parts I. & II. Design Summary, Page 1 of 1 Permit (to be provided by DWQ) III. REQUIRED ITEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. DM¢ 1 1. Plans (1" = 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, brAm Z 2. Section view of the permeable pavement (1" = 20' or larger) showing: - Layers, and - SHWT DM IZ MAkWNE 3. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. UM'c- 2 4. A construction sequence that shows how the permeable pavement will be protected from sediment until 1t�� the entire drainage area is stabilized. DAZ A 5. The supporting calculations. SSE DM - AUAO E h 6. A copy of the signed and notarized operation and maintenance (0&M) agreement. bIAM CO" 00 7. A copy of the deed restrictions (if required). Docs�coMep Example #1 bir-M Q13, iO3+PG431 Project is a lot with a maximum allowed BUA of 5,000 sq. ft. that drains to class SC waters. Project proposes a 1,000 sq. ft. permeable concrete driveway with a 6" gravel base. Managed grass factor = 0.6 1000 x 0.6 = 600 square feet is counted as managed grass. 1000 - 600 = 400 square feet is counted as built -upon area. 5000 - 400 = 4,600 square feel available for house and other BUA. Example #2 Project is a high density commercial site with a 5,000 square foot parking lot. Project is within 1/2 mile of and draining to SA waters. An infiltration system is proposed. The parking lot will handle <100 cars per day and is a flexible pavement with a 4" gravel base. Managed grass factor is one half of 0.4. = 0.2 5000 x 0.2 = 1000 square feet is counted as managed grass. 5000 - 1000 = 4,000 square is counted as impervious. The total BUA used to calculate the minimum volume draining to the infiltration system can be reduced by 1,000 square feet. Form SW401-Permeable Pavement-Rev.1 Page 1 of 1 Pan III. Required Items Checklist, Page 1 of 1 Permit (to be provided by DWQ) ®7n ?oF wnrFg0Y NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM o ` 401 CERTIFICATION APPLICATION FORM o INFILTRATION TRENCH SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. vrolect name Contact person Phone number Date Drainage area number I I.11 D ES I G N I I N FORMAT I O N Site Characteristics Pirate's Cove #2A (Parking Area for Building 6000) Drainage area 7,292.00 ryz Impervious area 3,413.00 ryz r- 9s. it Percent impervious 46.8% z Design rainfall depth i 1.5 in Peak Flow Calculations MAY 2 0 2009 Is pre/post control of the 1-yr 24-hr peak flow required? N (Y or N) 1-yr, 24-hr runoff depth I N/A in 1-yr, 24-hr intensity I N/A n/hr Pre -development 1-yr, 24-hr peak flow N/A ft3/sec Post -development 1-yr, 24-hr peak flow j N/A ft3/sec Pre/Post 1-yr, 24-hr peak flow control NIA ft3/sec Storage Volume: Non -SR Waters Minimum volume required N/A rya Volume provided N/A rya OK for non -SR waters Storage Volume: SR Waters 1-yr, 24-hr rainfall depth N/A in Pre -development 1-yr, 24-hr runoff N/A ft3 Post -development 1-yr, 24-hr runoff N/A rya Minimum volume required 429 rya (47% of parking lot runoff received) Volume provided 435 rya Soils Report Summary Soil type Ps- Psamments Infiltration rate 1.00 n/hr (Conservative Estimate) SHWT elevation 0.50 fmsl (Based upon supporting data) Trench Design Parameters Drawdown time I 0.5 days OK Chamber pipe diameter 0 in Chamber pipe length 0 ft Stone type (if used) washed Stone void ratio 40 Stone is free of fines? Y (Y or N) (estimated less than 10%) Trench Elevations Bottom elevation 3.50 fmsl (From bottom of gravel storage area) Storage/overflow elevation 6.50 fmsl (minimum overflow berm finished grade) Top elevation 6.00 fmsl (top of trench elevation) Form SW401-Infiltration Trench-Rev.1 Parts I, d II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWQ) Trench Dimensions Length (long dimension) 185 ft Width (short dimension) 2 ft Height (depth) 2.5 ft Additional Information Total runoff volume captured by trench (max storage) 0.12 ac-in OK Length of vegetative filter for overflow 30 ft OK Number of observation wells 1 OK Distance to structure 15 ft+ OK Distance from surface waters 40 ft + OK for non -SA waters Distance from water supply well(s) 100 ft + OK Separation from impervious soil layer 4 ft + OK Naturally occuring soil above SHWT 1 ft + OK Bottom covered with 4-in of clean sand? ; Y (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? I Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) (Overflow berm is provided) Trench wrapped with geotextile fabric? Y (Y or N) Pretreatment device provided N (Received via permeable pavement system) Form SW401-Infiltration Trench-Rev.1 Parts I. & II. Design Summary, Page 2 of 2 Permit No. (to be provided by DWO) 1117REQUIRED'tTEMS'CHECIdIST ate " Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. DMtz — - t�mQ 4 DMtz 2 b M Z Z DM2 tF>4. C �R `.�4it• DMtz 2 DMtL bmz t�MfZ Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Trench dimensions, Pretreatment system, High flow bypass system, Maintenance access, Recorded drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanout, - Flow distribution detail for inflow, - Vegetated filter, and - Pretreatment device. 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and - Inlet and outlet structures. 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. 6. An assurance that the installed system will meet design specifications upon initial operation once the project is complete and the entire drainage area is stabilized. 7. A construction sequence that shows how the infllration basin will be protected from sediment until the entire drainage area is stabilized. r 8. The supporting calculations. !�NE II A.iwHet 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement. C04w 10. A copy of the deed restriction. (Jots t�ca¢otcD ba.16w, %.` st (JG2b Form SW401-Infiltration Trench-Rev.1 Pan III. Required Items Checklist, Page 1 of 1 Permit No. fro be Pmvdad by Dwo) ��F WArpq STORMWATER MANAGEMENT PERMIT APPLICATION FORM o TA WEHR 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Contact Person Phone Number Date Drainage Area I Lot Number ZA Lot Owner's Signature Glenn Futrell 2524734201 Updated 4.1-2009 4${Buildirgf 6000 Parking Area) II. DESIGN INFORMATION Soils Report Summary . Soil type Ps-Psamments Infiltration rate 1,00 inthr Conservative rate utilized SHWT elevation 0.50 Intel Credit Calculation. Enter an in the appropriate cell below Within 12 mile of & draining to SA waters? N YIN Managed Grass Facto: Permeable concrete without a gravel base Permeable concrete with at least 6' gravel base Flexible pavements with at least 6' gravel base (interpolated) - x 0.532 Fledble pavements with at least 7' gravel base Bottom elevtion of the permeable pavement cross-section 5.53 fmsl OK SA of permeable pavement being proposed 7,292.00 fe Resulting BUA counted as impervious 3,412.66 It" Additional Information Slope of permeable pavement 0.50 % OK Construction sequence minimizes compaction to soils? Y YRJ OK Traffic volume (vehicles per day) 19.00 v/day . OK Washed stone is specified for the gravel layer (If used)? Y YIN OK Concentrated flow from rods & other surfaces directed away? Y YIN OK Additional Information for Residential Lots Only Total BUA allocated to this lot NIA ft, Remaining lot BUA available NIA ff To be completed by cerrnittee i HOA: Application Approved Application Rej*W ected Reason for rejecting application: Signature of penrifte I HOA: Date�j Form SW401-Permeable Pavemem-Rev.1 Pates I. & It. Design Summary, Page 1 of 1 Permit No. (to be provided by DWQ) IILAEQUIREVITEMS'CHECIa:IST , Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. 1JMIZ 1 1. Plans (1" = 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, DM2 2 2. Section view of the permeable pavement (1" = 20' or larger) showing: - Layers, and �M IZ WAILWNE -SHWT 3. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. t���,., ►�`n1C- 2 4. A construction sequence that shows how the permeable pavement will be protected from sediment until the entire drainage area is stabilized. bA17— tiX. A 5. The supporting calculations. Still; bMIZ R Eh 6. A copy of the signed and notarized operation and maintenance (0&M) agreement. DM2 CoiiOO 7. A copy of the deed restrictions (if required). by5. rxrokbeb Example #1 b.czb bg 103 laym-431 Project is a lot with a maximum allowed BUA of 5,000 sq. ft. that drains to class SC waters. Project proposes a 1,000 sq. ft. permeable concrete driveway with a 6" gravel base. Managed grass factor = 0.6 1000 x 0.6 = 600 square feet is counted as managed grass. 1000 - 600 = 400 square feet is counted as built -upon area. 5000 - 400 = 4,600 square feet available for house and other BUA. Example #2 Project is a high density commercial site with a 5,000 square foot parking lot. Project is within 1/2 mile of and draining to SA waters. An infiltration system is proposed. The parking lot will handle <100 cars per day and is a flexible pavement with a 4" gravel base. Managed grass factor is one half of 0.4. = 0.2 5000 x 0.2 = 1000 square feet is counted as managed grass. 5000 - 1000 = 4,000 square is counted as impervious. The total BUA used to calculate the minimum volume draining to the infiltration system can be reduced by 1,000 square feet. Form SW401-Permeable Pavement-Rev.1 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 Permit No. (to be provided by DWO) ©�� OW\% F W A TE NC ENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 5 401 CERTIFICATION APPLICATION FORM INFILTRATION TRENCH SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. 1.7P.ROJECTIINFORMATION Project name Pirate's Cove Tournament Pavilion Contact person ;Glenn Futrell Phone number 252-476-6800 Date Drainage area number II.'DESIGN IINF,ORMATION Site Characteristics Drainage area Impervious area Percent impervious Design rainfall depth Peak Flow Calculations 4/16/2009 #3A (Parking Area for Building 7000) FUTURE DEVELOPMENT 5,952.00 ftz 2,786.00 ft2 46.8% 1.5 in Is pre/post control of the 1-yr 24-hr peak flow required? I N (Y or N) 1-yr, 24-hr runoff depth I N/A in 1-yr, 24-hr intensity I N/A in/hr Pre -development 1-yr, 24-hr peak flow I N/A ft3/sec Post -development 1-yr, 24-hr peak flow IN/A ft3/sec Pre/Post 1-yr, 24-hr peak flow control N/A ft3/sec Storage Volume: Non -SR Waters Minimum volume required N/A ft3 Volume provided N/A fl3 OK for non -SR waters Storage Volume: SR Waters 1-yr, 24-hr rainfall depth N/A in Pre -development 1-yr, 24-hr runoff N/A ft3 Post -development 1-yr, 24-hr runoff N/A ft3 Minimum volume required 351 ft3 (47% of parking lot runoff received) Volume provided 352 ft3 Soils Report Summary Soil type Ps- Psamments Infiltration rate 1.00 in/hr (Conservative Estimate) SHWT elevation 0.50 fatal (Based upon supporting data) Trench Design Parameters Drawdown time 0.5 days OK Chamber pipe diameter I 0 in Chamber pipe length 0 ft Stone type (if used) washed Stone void ratio j 40 Stone is free of fines? Y (Y or N) (estimated less than 10%) Trench Elevations Bottom elevation 3.50 final (From bottom of gravel storage area) Storage/overflow elevation 6.50 fmsl (minimum overflow berm finished grade) Top elevation 6.00 fmsl (top of trench elevation) Form SW40 1 -Infiltration Trench-Rev.1 Parts I. & 11. Design Summary, Page 1 of 2 Permit No. (to be provided by DWq) Trench Dimensions Length (long dimension) 1190 ft Width (shortdimension) 1 2 ft Height (depth) 1 2.5 ft Additional Information Total runoff volume captured by trench 1 0.10 ac-in OK Length of vegetative filter for overflow 30 ft OK Number of observation wells 1 OK Distance to structure 15 ft + OK Distance from surface waters 40 ft + OK for non -SA waters Distance from water supply well(s) ; 100 ft + OK Separation from impervious soil layer 4 ft + OK Naturally occuring soil above SHWT 1 ft + OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Recorded drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) (Overflow berm is provided) Trench wrapped with geotextile fabric? Y (Y or N) Pretreatment device provided N (Received via permeable pavement system) Form SW401-Infiltration Trench-Rev.1 Parts I. & 11. Design Summary, Page 2 of 2 Permit Ill.-REQUIREDITEMS CHECKLIST - (to be provided by DWO) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. b tM �_ 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Trench dimensions, - Pretreatment system, - High Flow bypass system, - Maintenance access, - Recorded drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 2 2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing: - Bypass structure, - Maintenance access, - Basin bottom dimensions, - Basin cross-section with benchmark for sediment cleanout, - Flow distribution detail for inflow, - Vegetated filter, and DMQ - Pretreatment device. 3. Section view of the infiltration basin (1" = 20' or larger) showing: - Pretreatment and treatment areas, and DfaArL Z - Inlet and outlet structures. 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. DMa tEX. C . 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils eNbL investigation request form. County soil maps are not an acceptable source of soils information. ►�� ``�� yR[ 6. An assurance that the installed system will meet design specifications upon initial operation once the DM� �f ` project is complete and the entire drainage area is stabilized. 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the entire drainage area is stabilized. 8. The DN1rC c7 E supporting calculations. �Tjp,41i� 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement. ^,, � � 10. A copy of the deed restriction. UnILFvr:+OPI�D Form SW401-Infiltration Trench-Rev.1 Part III. Required Items Checklist, Page 1 of 1 Permit No. (to be provided by DWQ) ®�� ��F WATFq L O A! STORMWATER MANAGEMENT PERMIT APPLICATION FORM o HOEM 401 CERTIFICATION APPLICATION FORM PERMEABLE PAVEMENT SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Contact Person Phone Number Date Drainage Area I Lot Number Lot Owner's Signature Sod type Infiltration rate SHWT elevation Credit Calculation- Ester an in the appropriate cell below Whin 12 mile of & draining to SA waters? Permeable concrete without a gravel base Permeable concrete with at least 6' gravel base Flexible pavements with at least 6' gravel base(interpolated) Flexible pavements with at least 7' gravel base Bottom elevtion of the permeable pavement cross-section SA of permeable pavement being proposed Resulting BUA counted as impervious Additional Inftlnnation Slope of permeable pavement Construction sequence minimizes compaction to soils? Traffic volume (vehicles per day) Washed store is specified for the gravel layer (it used)? Concetraled flow from roofs & other surfaces directed away? Additional Information for Residential Lots Only Total BUA allocated to this lot Remaining lot BUA available Giemt Futrell 2524734201 Ps-Psamments 1.00 inlhr Conservative rate utilized 0.50 (Thal N YIN ManNed Grass Factor. x 0.532 5.53 f nsl OK 5,952.00 e 2,785.54 fe 0.50 % OK Y YIN OK 19.00 vlday OK Y YIN OK Y YIN OK NIA flz NIA ilz r i ��11 1 . IIIY.II I Form SW401-Permeable Pavement-Rev.1 Parts I. & II. Design Summary, Page 1 or 1 Permit III:::iREQUIRED,REM3 CHECKLIST - (to be provided by DWQ) Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. DM¢ 1. Plans If" = 50' or larger) of the entire site showing: - Design at ultimate build -out, - OH -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Location of permeable pavement, - Roof and other surface flow directed away from permeable pavement, DMIZ Z 2. Section view of the permeable pavement (1" = 20' or larger) showing: - Layers, and -SHWT DMIZ AIAPJ2/TfrvE 3. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWO, by completing & submitting the soils ^..^ investigation request form. County soil maps are not an acceptable source of soils information. lJ` 2 4. A construction sequence that shows how the permeable pavement will be protected from sediment until the entire drainage area is stabilized. A5. The supporting calculations. 5sE �MQ ALITACKEh 6. A copy of the signed and notarized operation and maintenance (0&M) agreement. D MfZ UN llfvl:OUT A copy of the deed restrictions (if required). Example #1 Project is a lot with a maximum allowed BUA of 5,000 sq. ft. that drains to class SC waters. Project proposes a 1,000 sq. ft. permeable concrete driveway with a 6" gravel base. Managed grass factor = 0.6 1000 x 0.6 = 600 square feet is counted as managed grass. 1000 - 600 = 400 square feet is counted as built -upon area. 5000 - 400 = 4,600 square feet available for house and other BUA. Example #2 Project is a high density commercial site with a 5,000 square foot parking lot. Project is within 1/2 mile of and draining to SA waters. An infiltration system is proposed. The parking lot will handle <100 cars per day and is a flexible pavement with a 4" gravel base. Managed grass factor is one half of 0.4. = 0.2 5000 x 0.2 = 1000 square feet is counted as managed grass. 5000 - 1000 = 4,000 square is counted as impervious. The total BUA used to calculate the minimum volume draining to the infiltration system can be reduced by 1,000 square feet. Form SW401-Permeable Pavement-Rev.1 Page 1 of 1 Pan III. Required Items Checklist, Page 1 of 1