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HomeMy WebLinkAboutSW7080905_HISTORICAL FILE_20210712STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE (% IM YYYYMMDD k4/ o ROY COOPER Governor ELIZABETH S. BISER Secretary BRIAN WRENN Director Grander, LLC Attention: Tammy T 2600 Sailfish Drive Manteo, NC 27954 Tobin, Manager NORTH CAROLINA Environmental Quality July 12, 2021 Subject: Stormwater Permit Renewal Stormwater Management Permit SV 7080905 Pirates Cove Tournament Pavilion & Marlin Pond System Dare County Dear Ms. Tobin: A Division of Energy, Mineral, and Land Resources file review has determined that Stormwater Permit SV 7080905 for a stormwater treatment system consisting of a wet detention pond, infiltration trench and an infiltration basin serving the Pirates Cove Tournament Pavilion located at 4 Sailfish Drive, Manteo, NC expires on December 31, 2021. This is a reminder that permit renewal applications are due 180 days prior to expiration. We do not have a record of receiving a renewal application. Please submit a completed permit renewal application along with a $505.00 fee for permit renewal. Permit application forms for renewal can be found on our website at: https://deq.nc.gov/about/divisions/energy-mineral-and-land- resources/stormwater/stormwater-program/post-construction-2. North Carolina General Statutes and the Coastal Stormwater rules require that this property be covered under a stormwater permit. If you have questions, please feel free to contact me at (252) 948-3923. 1 will be glad to discuss this by phone or meet with you. If you would like, I can e-mail you a copy of the application forms. You can request a copy by e-mailing me at roger. thorpe(cDncdenr.gov. Sincerely, Roger K. Thorpe Environmental Engineer 1-1 �Nftmz North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources _ � Washingron Regional Offlre 1 943 Washington Square Mall ! Washington. Nonh Carolina 27BA9 252.946.648I kg6 MCDENR 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, 2009 Roanoke Properties, LTD Attn: Mr. Glenn Futrell 1 Sailfish Drive Manteo, NC 27954 ,eV, ce e P, sw 7o802o-�- "ss 3%/6/zoio Subject: Stormwater Permit No. SW7080905 Pirates Cove Tournament Pavilion & Marlin Pond System High Density Project . Dare County Dear Mr. Futrell: The Washington Regional Office received a complete Stormwater Management Permit Application for the subject project on January 2, 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. SW7080905 dated March 16, 2009, for the construction of the subject project. This permit shall be effective from the date of issuance until March 16, 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. 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, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. North Carolina Division of Water Quality Internet: www.ncwateraualitv.ore 943 Washington Square Mall Phone: 252-946-6481 Washington, NC 27889 FAX 252-946-9215 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper NorthCarohna Naturally Page 2 of 9 Roanoke Properties, LTD March 16, 2009 Page Two If you have any questions, or need additional information concerning this matter, please contact Bill Moore, or me at (252) 946-6481. incer y, VAl Hoag r Regional Supervisor Surface Water Protection Section cc: Quible & Associates Pare County Planning/Inspections ashington 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, LTD Pirates Cove Tournament Pavilion Dare County FOR THE construction, operation and maintenance of (1) infiltration trench system, (1) infiltration basin, (1) existing wet pond, and (1) pre-treatment basin with draw down pumps and conveyance pipes 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 for Pirates Cove Tournament Pavilion and Marlin Pond System located adjacent to Sailfish Drive in Pirates Cove near Manteo, NC. This permit shall be effective from the date of issuance until March 16, 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. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The stormwater controls have been designed to handle the runoff from 77,166 square feet of impervious area. The tract will be limited to the amount of built -upon area indicated on page 4 of this permit, and per approved plans. Page 4 of 9 1 4. 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. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. 6. The following design criteria have been provided for this project and must be maintained at design condition: a. Combined Drainage areas: 2.91 acres b. Total Impervious Surfaces: 13,248 sf - DA 1 48,503 sf - DA 2 15,415sf-DA3 C. Design Storm: 1.5 - inches d. Infiltration Basin Provided Area: 1127 sf -serves DA 3 (@ design storage elev 4.65) e. Infiltration Basin Provided Storage: 1893 cf (based on 1.5-inches) f. Wet Pond Provided Area: 9394 sf - serves DA 1 &2 (permanent pool elev. 2.2) g. Wet Pond Storage Provided: 36,083 cf (@ max. storage elev. 4.5) h. Infiltration Trench Provided Storage: 1581 cf - serves DA 1 (based on 1.5-inches) i. Receiving Stream/River Basin: UT -Roanoke Sound j. Classification of Water Body: SA k. Note: Overflows from the Infiltration Basin & Infiltration Trench System are collected in a common storage basin/swale with a duplex pump system designed to handle the 10-yr 24-hr storm event. Overflows are pumped from the storage basin to an existing wet pond system designed to store an equivalent 7.2-inch rainfall event. 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. Page 5 of 9 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 Plan 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. f. Debris removal and unclogging of bypass structure, infiltration 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. 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. Page 6 of 9 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. 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. 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. 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. 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. Page 7 of 9 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. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. 10. This permit shall be effective from the date of issuance until March 16, 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. Permit issued this the 16 th day of March, 2009. NTH AROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Coleen H. ullins, Director Division of Water Quality By Authority of the Environmental Management Commission Stormwater Permit SW7080905 Page 8 of 9 s Pirates Cove Tournament Pavilion & Marlin Pond System Stormwater Permit No. SW7080905 Dare County 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 Certification Attachment 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 weir elevation is per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the 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. I O�O� W A r�9QG r • .:M 1111 NOV 2 0 2009 t Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources WATER QUALITY SECTION I. CURRENT PERMIT INFORMATION: 1. Stormwater Management Permit Number: -.5rw 2. Permit Holder's Name: )7 on,11u ze: :AX Coleen H. Sullins, Director Division of Water Quality Ver. �. D SW%eo9o�- HIP CHANGE FORM A/f•Ik5r9ti iss.�R o�J X D 9105- Qrn. 4/a/,;?,/9 7J; 3. Signing official's Name: Title: Z,?/aC. DB, 4. Mailing Address: / fJfr UE / City: 2y,&16-0 State: /Y C• Zip: o? Phone: (6752- Fax: (0?0;?- 5z73- 54a00 if. NEW OWNER / PROJECT / ADDRESS INFORMATION: 1. This request is for: (please check all that apply) a. Change in ownership of the property/company (Please complete Items #2, #3, and #4 below) b. Name change of project (Please complete Item #5 below) C. Mailing address change. (Please complete Item #4 below) d. Other (please explain): 2. New owner's name to be put on permit: 1n1,Cll 3. New owner's signing official's name and title: /r%/Ir✓.fl�Ji.,rq P//rr7//1�/G Title: 4. New Mailing Address: City: State: C• Zip: a7ytrC.,4 Phone: (07 o? - fZ73- 3 90 (p Fax: ( ) 5. New Project Name to be placed on permit: 0w ership/Name Change-080808 Page 1 of 3 PERMIT NAME/OWNERSHIP CHANGE FORM THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION OF WATER QUALITY UNLESS ALL OF THE APPLICABLE ITEMS LISTED BELOW ARE INCLUDED WITH THE SUBMITTAL. REQUIRED ITEMS: 1. This completed form. 2. Legal documentation of the transfer of ownership. 3. A copy of the recorded deed restrictions, if required by the permit. 4. The designer's certification, if required by the permit. 5. A signed Operation and Maintenance plan, if a system that requires maintenance will change ownership. 6. Maintenance records. CERTIFICATION MUST BE COMPLETED AND SIGNED BY BOTH THE CURRENT PERMIT HOLDER AND TKEITEW APPLICANT IN THE CASE OF A CTUME OF OWNERSHIP. FOR NAME CHANGES, COMPLETE AND SIGN ONLY THE CURRENT PERMITTEE'S CERTIFICATION. Current Perm' ee's Certification: I, attest that this application for a name/ownership chin a has been reviewed and is accurate and complete to the best of my knowledge. I understand that if all required parts of this application are not completed and that if all required supporting information and attachments are not included, this application package will be returned as incomplete„ Signature: New Applicant's Certification: (Must be completed for all transfers of ovmership) t trY�rnbPX I c l►Vl►ny Tab(h Wn g"- attest that this application for an ownership change has been r viewed and is accurate and complete to the best of my knowledge. I understand that if all required parts of this application are not completed and that if all required supporting information and attachments are not included, this application package will be returned as incomplete. Signature: Date: Mail the entire package to: NCDENR Division of Water Quality Surface Water Protection Section — Stormwater at the Appropriate Contact Address (see the following page) Omership/Name Change-080808 Page 2 Of 3 l .6 , V vl J Pirates Cove Tournament Pavilion & Marlin Pond System Stormwater Permit No. SW7080905. Dare County Designer's Certification I, nAVtD V`fA*N , as a duly registered ENv1Nu2 in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, IOA1 (Project) for V0A&VK.E F?Z0>PVRTiG5 , I,Tt,, (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. Signature p^ Registration Number 030 OCR Date MAY I Z, 4009 MAY 14 2009 SEAL C/ nOe `2p .OFtiSS/n . y% 4 SEAL z 030406 Page y of y Certification Attachment C)M21. The drainage area to the system contains approximately the permitted acreage. bMIZ 2. The drainage area to the system contains no more than the permitted amount of built -upon area. DMR 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. bI4. All roof drains are located such that the runoff is directed into the system. bMQ-5. The bypass structure weir elevation is per the approved plan. bArL 6. The bypass structure is located per the approved plans. bMrc 7. A Trash Rack is provided on the bypass structure. DMrZ8. All slopes are grassed with permanent vegetation. p)MQ9. Vegetated slopes are no steeper than 3:1. DMit 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. DMQ 11. The permitted amounts of surface area and/or volume have been provided. t)M(Z12. All required design depths are provided. r>MfL 13. All required parts of the system are provided. t)MQ 14. The required system dimensions are provided per the approved plans. vvz The 60agta1fW'er125 MAY 14 2009 LETTER OF 7rRANSMIT'TAL Date: May 12, 2009 To: William J. Moore NCDENR — D\CIQ Project #: 3357 943 Washington Square Mall Project Name: Pirate's Cove Tournament Washington, NC 27889 Pavilion HAND DELIVERED I I OVER -NITS MAIL I X I MAIt nn I I FAXED We are sending Fx I Enclosed ❑ Attached ❑ Under separate cover via As Requested 0 For Your Use For Review & Comment For Client Approval For permit Approval F-qFor Your Records For Bid Submission For Distribution For Release the following items: For Construction For Const. Record Confidential COPIES DESCRIPTION DATE 1 Engineer's Certification 5/12/09 REMARKS: Mr. Moore, As per David Ryan's e-mail dated May 12, 2009, I have enclosed a hard copy of the Engineer's Certification for the Pirate's Cove Tournament Pavilion for your records. If you have any comments or questions pertaining to this information, please do not hesitate to contact me. Sincerely, BISSELL PROFESSIONAL GROUP "M7 Z014 Mary York Engineering Coordinator P.O. Box 1068 ■ 3512 N. Croatan Hwy. ■ Kitty Hawk, NC 27949 252-261-3266■ Fax:252-261-1760 ■ E-mail:bpg@bissellprofessionalgroup.com • - - - DWQ USE ONLY Date Received Fee Paid Permit Number IAN - 2 2009 f— 5W 7 o B o 90 5— '' State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Roanoke Properties, Ltd 2. Print Owner/Signing Official's name and tit perso legally responsible for facility and compliance): Glenn E. Futrell - Agent 9/9 y 8/o - o9d o 3. Mailing Address for person listed in item 2 above: City: Manteo Phone: (252 ) 473-6800 State: NC Zip: 27954 Fax: (252 ) 473-6412 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Pirates Cove Tournament Pavilion 5. Location of Project (street address): City: Manteo County: 6. Directions to project (from nearest major intersection): Approx. 0.16 miles from entance of Pirates Cove Development on south side of Sailfish Dr. Entrance to Pirates Cove is located approx. 1.0 mile east of intersection of HWY 64 & BUS 64 in Manteo. 7. Latitude: 36 deg. 4 min. 49 sec. N Longitude: 76 deg. 24 min. 17 sec. W of project 8. Contact person who can answer questions about the project: Name: David M. Ryan Telephone Number: (252 ) 261-3266 Email: dave@bissellprofessionalgroup.com II. PERMIT INFORMATION: 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page 1 of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks): ❑LAMA Major ❑Sedimentation/Erosion Control 0404/401 Permit ❑NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Provision of french drain collection network, pre-treatment vegetative Swale and (1) wet -detention pond 2. Stormwater runoff from this project drains to the Pasquotank River basin. ZR1 3. Total Site Area:— (w/ offsite) acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area**: 0.74 (on -site) acres 7. Project Built Upon Area: 77.16 % 8. How many drainage areas does the project have? 2 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as bTe�low. Basin Information - Drainage Area 1 -• . . - • - - Drainage -Area 2 Receiving Stream Name Roanoke Sound Roanoke Sound Stream Class & Index No. SA, 30-21 SA,30-21 Drainage Area (sf) f 2 �r 70508 oc Z s4' -4323 , Existing Impervious* Area (so 14 f 43,6 0 CA f ' apz Proposed Impervious*Area (sf) 1 1 0 SU3 5k 0 % Impervious* Area (total) (o° °o b1 94°�— °� 0% Impervious Surface Area ,; Drainage Area 1' ` ° " ''' Drainage Area 2 n . On -site Buildings (so 12,624 0 On -site Streets (sf) 2,388 0 On -site Parking (so 8,834 0 On -site Sidewalks (so 624 0 Other on -site (so 309 0 Off -site (so 18,895 0 . Total (so: 43,674 0 ola•�- S / Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. Form SWU-101 Version 8.07 Page 2 of 4 ' �. � 'w � it 0 N �� =2 �� N r �. �„ ,� lL ?- i r. i/!1 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit []Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks): ❑CAMA Major ❑Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Provision of (1) interconnected infiltration trench collection network (1) infiltration basin (1) pre-treatment vegetative swale, and (1) wet -detention pond 2. Stormwater runoff from this project drains to the Pasouotank River basin. 3. Total Site Area: 2.14 (w/ offsite) acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area": 2.14 acres 7. Project Built Upon Area: 66 % 8. How many drainage areas does the project have? 3 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided }'n the same format as below. n!E u6r4v4J Phv(4,p. 4. f II I . Basin Information Drainage Area a Receiving Stream Name Roanoke Sound Roanoke Sound Stream Class & Index No. SA, 30-21 SA,30-21 Drainage Area (so -510 s.( 20,310 0 `' ` 0 Existing Impervious" Area (sf) Ir4lS S4r 15,415 y^^� , 0 Proposed Impervious*Area (so 0 1 0 % Impervious" Area (total) 76 °0 76% 1 Inr ervious` Surface Area"". 'Drainage Area 3 On -site Buildings (so 0 On -site Streets (so 0 0 On -site Parking (so 15,415 0 On -site Sidewalks (so 0 I 0 Other on -site (so 0 0 Off -site (so 0 0 Total (so: 15,415 0 Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWU-101 Version 8.07 Page 2 of 10. How was the off -site impervious area listed above derived? On -site survey and field investigations IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SW401-Low Density Low Density Supplement Form SW401-Curb Outlet System Curb Outlet System Supplement Form SW401-Off-Site System Off -Site System Supplement Form SW401-Wet Detention Basin, Wet Detention Basin Supplement Form SW401-Infiltration Basin Infiltration Basin Supplement Form SW401-Infiltration Trench Underground Infiltration Trench Supplement Form SW401-Bioretention Cell Bioretention Cell Supplement Form SW401-Level Spreader Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Form SW401-Wetland Constructed Wetland Supplement Form SW401-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SWU-101 Version 8.07 Page 3 of 4 2/31,2008 13:22 FAX 2524734200 PIRATE'S COPE 16001 SUBMITTAL REQUIREMENTS rely complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at htrn:!/h2o.cnr.stalc.nc-uslsu/msi maos,hun) Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and aria copy of the Stormwater Management Permit Application Form Original and one copy of the Deed Restrictions & Protective Covenants Form • Original of the applicable Supplement Form(s) and O&M agreement(s) for grh BMP • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soilreport • Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section - Designated agent (individual or firm): Bissell Professional Group Mailing Address: P.O. Box 1068 City: Kitty Hawk State: NC Zip:27949 Phone: (252 ) 261-3266 Fax: 1252 L261-1760 EDiaiL-dave@bissel)12mfenionalp:roup.com VIIL APPLICANT'S CERTIFICATION L (print or type name of person listed in General Information, item 2) certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the ro osed project complies with the requirements of ISA NCAC ZT4.1000. 1-7_ / ' Date:_ / Z -- 3 c/—G� FormSWU-101 Version8.07 Page 4of4 TkeGoa0p,11T Perto September 03, 2008 Mr. William Moore NCDENR, Water Quality Section 943 Washington Sq. iviall Washington, NC 27889 Dear Mr. Moore, JAN - 2 2009 SUBJECT: PIRATES COVE TOURNAMENT PAVILION S\\ 7080905 On behalf of Glen Futrell & Pirate's Cove, Bissell Professional Group requests review of the proposed stormwater management plan in support of the Pirate's Cove Tournament Pavilion site. This package is being submitted in response to the request for additional information dated December 2, 2008 and the subsequent follow-up meeting conducted on Tuesday December 16, 2008. The following is a summary of those discussions and how each item has been addressed; • The corrective action measures that have been implemented in the existing structure labeled "irrigation control valve", located in the proximity of the SW corner of the Pavilion structure currently do not provide a "permanent" solution. Additional measures, in the form of backfilfing this structure with grout will constitute a "permanent" mechanism to prohibit future use of this structure. Answer: The additional grout described above will be implemented during installation of the proposed infiltration measures and will be denoted as such in the engineer's certification. • The corrective actions that have been implemented on the existing drop inlet located adjacent to the eastern most access drive that services the pavilion site have been deemed sufficient as a "permanent" solution to prohibit future use of this drainage structure. • Additional review of the existing "Marlin Pond" will be required to be conducted to ensure that there are not outlets that drain into the adjoining surface waters or wetlands. Answer. Additional investigation was conducted and it appears that there are no apparent existing devices that were observed to outlet from the pond. This has been denoted on sheet 1 of 2. The existing gravel parking & drive area directly east of the pavilion structure will be incorporated into this application. Although acting as a "temporary measure", until at which time the remaining Sailfish Condominium structure is constructed, it will be considered part of this permit application. Associative calculations will be required as well as the requisite supplements for this area. Further soils investigation will be required to determine seasonal high wetness conditions in this area in conjunction with some investigation for adequacy of the permeability of the underlying soils and determination of potential soils replacement. This measure shall be required to demonstrate adequacy for storage of rainfall runoff from its tributary area for a 1.5" rainfall event. An overflow device shall be provided with an overflow elevation equivalent to the 1.5" rainfall event water surface elevation that can connect, via pipe, to the existing roadway swale located along Sailfish Dr. (see below). P.O. Box 1068 ■ 3512 N. Croatan Hwy. ■ Kitty Hawk, NC 27949 252-261-3266■ Fax:252-261-1760 0 E-mail: bpg@bissellprotessionalgroup.com — 2 — December 31, 2008 Answer: This drainage area has been included into the stormwater management plans and is denoted as Drainage Area #3. This on -site drainage watershed is 0.47 acres in area and is composed of gravel parking & drives that sheet flow into the existing infiltration basin. Additional soils investigations were performed and based upon the results, the soils in the proximity of the existing infiltration basin located in the northeast corner of the project area appear to be restricting the infiltrative capacity of the soil. It can be estimated that the elevated static water level readings in this area can be attributed to the reduced infiltration rate within the clav/organic layer identified approximately 2' below the existing basin bottom surface. In an effort to avoid creating a potential ponding problem, and demonstrating compliance with the required drawdown period, this proposal includes the removal of the organic/clap layer beneath the infiltration basin floor with replacement of clean sand backfill material Additionally in its current state, the basin is inadequate to accommodate the runoff for a 1.5" rainfall event. Therefore, a proposed basin expansion in conjunction with soils removal and replacement are being proposed to support increased volume and infiltrative capacities for this device. An overflow device is also being proposed to convey rainfall amounts in exceedance of the 1.5" rainfall event to the existing pretreatment device/forebay measure located to the west. The overflow device will consist of a drain basin containing a 12" dia. grate inlet, set at the temporary pool elevation and a direct pipe connection to the pretreatment device. These measures are considered temporary in nature due to a future development plan that will covered under a separate permit. • A minimum vertical separation of 12" must be obtained between the bottom of all proposed infiltration devices and the determined seasonal high water level. Answer: Based upon additional soils investigations being conducted in the proximity of the proposed stormwater controls, it was discovered that the groundwater levels were predominately 48" below the existing ground surface. Based upon the recent rainfall amounts, it can be estimated that the subsurface static water level readings are indicative of those that typify seasonal high conditions. To account for the potential increase in groundwater levels observed at the dine of investigation, au additional 6 inch vertical buffer is being proposed for a total 18" vertical separation from the bottom of the proposed measures to the estimated seasonal high water level. • As previously described in the plan submission, the subsurface EZ-Flow pipes are proposed along the east, south & west sides of the existing pavilion structure. An additional gravel infiltration trench is proposed along the northern periphery of the structure with connecting perforated pipes & inlet structures for maintenance. The intent is to provide adequate storage within these devices from the tributary rainfall runoff of the pavilion structure. Answer. For the purposes of permitting, this 0.30 ac. watershed is divided into two sub- regions, based upon the method of infiltration trench proposed to manage the total 1.5" rainfall runoff from the Tournament Pavilion. The rainfall runoff generated from the northern portion of the roof, Drainage Area #113, will be captured in a 185 Lf. 5.5' wide by 2.5' deep gravel infiltration trench. An 8" dia. perforated collection pipe will be installed within the trench Emits that will connected via (4) drain basins that will serve as inspection ports and allow for maintenance of the system. The rainfall runoff generated from the eastern, western& southern portions of the roof, Drainage Area #1A, will be captured in a 328 Lf. 2' wide by 2' deep infiltration trench containing (4) bundles of EZ-Flow drainage — 3 — December 31, 2008 pipe. This 4" clia. perforated collection pipe encased within a polystyrene aggregate will be installed within the trench limits and connected via (4) drain basins that will serve as inspection ports and allow for maintenance of the system. A 6" high berm is proposed along the western infiltration trench section to prohibit the potential for excess rainfall from sheet flowing into the adjoining surface waters. Runoff in excess of the 1.5" rainfall event will sheet flow overland to the existing vegetative pretreatment device located adjacent to Sailfish Dr.. Rainfall runoff will be temporarily stored within this device, prior to being pumped, via a duplex pump station, to the existing "Marlin Pond" located at the Pirate's Cove Development entrance. The existing vegetative roadway Swale located in-between the existing gravel parking area & Sailfish Dr. will sere as a sediment pretreatment/stormwater collection device. The existing sump pump/inlet structure will be required to be replaced with a duplex pumping system/inlet structure to accommodate runoff resulting from a 10-yr storm event. Answer: This proposal includes the removal of the existing sump pump and full replacement with a duplex drain pump system to be installed within a permanent subsurface structure. The pumps have been designed to handle 2.5 times the resultant peak runoff from a 10 yr-24 hr design storm event. Details of this configuration are described on sheet 2 of 2. • Applications, supplements, narrative @ plans shall be updated to reflect these changes. Answer. Three copies of each are enclosed within. Attached are (3) copies of the updated general stormwater permit application, wet detention basin supplement, infiltration basin supplement, infiltration trench supplement, off -site supplement, signed and notarized operation & maintenance agreement forms, system checklists, supporting calculations, stormwater management narrative and system design plans for your review. If you require any additional information or if we may be of assistance to you in any way, please do not hesitate to contact our office. We thank you for your time and consideration of this matter. Sincerely, David NI. Rye P VicerPresident of Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources. Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM OFF -SITE SYSTEM SUPPLEMENT FOR DEVELOPMENT DRAINING TO PERMITTED OFF -SITE TREATMENT SYSTEMS This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, an off -site system supplement for each off -site stormwater treatment system, appropriate supplement forms for any on -site stormwater treatment systems, and plans and specifications showing all stormwater conveyances and drainage details for the project. I. PROJECT INFORMATION Project Name : Pirates Cove Tournament Pavilion Contact Person: Glenn E. Futrell Phone Number: (252) 473-6800 Is all drainage from the project directed to the off -site system? (check one): ❑ Yes ®No THE PZoF- RUNOFF FMWA_r 5 1OukR-,A,ctE",T F�XvtuoN tg BEtN(�, AAJk0QAbFb VIA iAiP7, crrzAnat, TREA)Gti6S low COA, uNcTloav V"/ A&) 1tuf'tI.T1zAcTiioN BASIAI MP.N.4(�tn,l� 2t/NoFV F=rZOAA THE ex, S7AZT5MAj GmAe.SL F'.ket=tA,6 AMSA. II. OFF -SITE SYSTEM INFORMATION (please complete the following information for the off -site system that will treat runoff from your project): Permit No. Project Name: Pirates Cove Type of System (wet pond, infiltration basin, etc.):Wet Detention Pond Lot No. (if part of a subdivision): N/A How much built upon area draining to the permitted treatment system has been allocated to this project? 35,557 s.f. (Includes tributary area currently draining to wet pond & impervious coverage on subject property not accounted for within proposed on -site storage & treatment devices III. REQUIRED ITEMS CHECKLIST Prior to issuing an off -site permit, verification of the following information must be provided. Initial in the space provided to indicate that the following requirements have been met and supporting documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Form SW401-Off-Site System-Rev.l Page 1 of 2 Applicants Initials N/A a. Deed restrictions limiting the built -upon area on the site have been recorded. 1J A b. Engineers certification for the existing off -site system has been submitted to DWQ. N/A c. There are no outstanding Notices of Violation for the off -site system. NIA d. Off -site system is in compliance with the issued permit. IV. STORMWATER COLLECTION SYSTEM MAINTENANCE REQUIREMENTS I. Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches at any time. 2. Accumulated sediment and trash will be removed from the collection system as necessary. Swales and ditches will be reseeded or sodded following sediment removal. 3. Eroded areas of swales and ditches will be repaired and reseeded. Swales and ditches will be revegetated as needed based on monthly inspections. 4. The collection system, including catch basins, curb cuts, velocity reduction devices, and piping, will be inspected monthly or after every significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts, velocity reduction devices, and piping. 5. The collection system may not be altered in any way without prior approval from NCDENR Division of Water Quality. 1 acknowledge and agree by my signature below that I am responsible for maintaining the stormwater collection system in accordance with the five maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Glenn E. Futrell - Agent Address: 1 Sailfish Dr Phone: (252) 473-61%;z Date: r Z 3 v O Note: The legally responsible partyshould not be a homeowners association unless snore than 50%of the lots have been sold and a resident ofthe subdivision has been named the president. I, tPOL-V^ t : -y V a.t- O U a Notary Public for the State ofy ; cif — LhO I,' cLCounty of 2 Ly tN-r'L, , do hereby certify that �I� E �>%t.¢_.t. personally appeared before me this) VY� day of LL.cp jm i41-k- t-^ , ;4�9' , and acknowledge the due execution of the forgoing document including the stonnwater collection system maintenance requiranigpts. Witness my hand and official seal, NOTAgN, %�` •• °US00 ••• de SEAL ? O ••.,,....••• G Form SWU-106 Rev B.Oyg9F GO. r,n„�nn,u,00 at �' �— t - " / \ /' I-, k " dut Notary Public u My commission expires I 1 / % 490 07 Page 3 of 2 WnRO Michael F. Bosley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources December 2, 2008 Roanoke Properties Attn: Mr. Glenn Futrell 1 Sailfish Point Manteo, NC 27954 Subject: Stormwater Review SW7080905 Tournament Pavilion Dare County Dear Mr. Futrell: Coleco if. Sullins, Director Division of Water Quality This office received a Coastal Stormwater permit application for the subject project on September 4, 2008. A preliminary review of your project indicates that before a State Stormwater permit can be issued, the following additional information is needed: 1. Existing drain observed near SW corner of Pavilion, where does this drain; Will it be eliminated ? 2. Does existing pond have any outlet/pipes to surface waters ? Confirm. 3. Existing drain observed near NE comer of parking lot; where does this drain, will it be eliminated ? 4. Existing gravel parking appears to serve the Pavilion & should be included in the drainage basin/calculations. Does this area drain to an existing infiltration basin ? 5. The existing infiltration Swale/sump pump does not appear to provide adequate capacity/storage. If this system carries all stormwater to the wet pond, then it should be designed for a minimum 10- year storm event. If adequate space is not available; then, other stormwater measures could be used in combination; such as porous pavement or subsurface storage units. 6. Revise application, supplements, narrative & plans as need to reflect any changes. The above requested information must be submitted to this office prior to January 2, 2009, or your application will be returned as incomplete. The return of this project will necessitate resubmittal of all required items including a new application fee. If you need additional time to complete the application package, please mail or fax your request to this office and include any reason(s) for the time delays. You should also be aware that the Stormwater Rules require that the permit be issued prior to any development activity. Construction without a permit is a violation of 15A NCAC 2H.1000 and North Carolina General Statute 143-215.1 and may result in civil penalties of up to $25,000 per day. If you have questions, please feel free to contact me at (252) 948-3919, or you can send a message to: bill.moore@ncmaii.net. Since I , ` IIW liam J. M �� Environmen ngineer Washington Regional Office cc: Bissell Professional Group l/*ashington Regional Office North Carolina Division of Water Quality Internet: wanv ❑cwaleruualitV urg One 943 Washington Square Mall Phone (252) 946-6481 ViCarolina Washington, NC 27889 Fax(252)946-9215 mrallbl - vg.-- - __.. DWQUSE ONLY Date Received Fee Paid Permit Number SEN - 4 ZUUU r'i, + " State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM v JU This form may be photocopied for use as an original 1. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): Roanoke Properties, Ltd 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Glenn E. Futrell - Agent 3. Mailing Address for person listed in item 2 above: City: Manteo State: NC Zip: 27954 Phone: (252 ) 473-6800 Fax: (252 ) 473-6412 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Pirates Cove Tournament Pavilion 5. Location of Project (street address): City:, 6. Directions to project (from nearest major intersection): Approx. 0.16 miles from entance of Pirates Cove Development on south side of Sailfish Dr. Entrance to Pirates Cove is located approx. 1.0 mile east of intersection of HWY 64 & BUS 64 in Manteo 7. Latitude: 36 deg. 4 min. 49 sec. N Longitude: 76 deg. 24 min. 17 sec. W of project 8. Contact person who can answer questions about the project: Name: David M. Ryan Telephone Number: (252 ) 261-3266 Email: daveQbissellprofessionalgroup.com 107— 12113 11. PERMIT INFORMATION: 1. Specify whether project is (check one): ®New ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page 1 of 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ❑Low Density ®High Density ❑Redevelop ❑General Permit ❑Universal SNIP []Other 4. Additional Project Requirements (check applicable blanks): ❑CAMA Major ❑Sedimentation/Erosion Control 0404/401 Permit ❑NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. ❑I. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. Provision of french drain collection network, pre-treatment vegetative swale, and (1) wet -detention pond 2. Stormwater runoff from this project drains to the Pasquotank River basin. 3. Total Site Area: 1.72 (w/ offsite) acres 4. Total Wetlands Area: 0 acres 5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site) 6. Total Project Area**: 0.74 (on -site) acres 7. Project Built Upon Area: 77.16 % 8. How many drainage areas does the project have? 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Roanoke Sound Roanoke Sound Stream Class & Index No. SA, 30-21 SA,30-21 Drainage Area (so 70,508 4,323 Existing Impervious* Area (so 43,674 0 Proposed Impervious*Area (so 0 0 Impervious* Area (total) 61.94% 0% Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (so 12,624 0 On -site Streets (so 2,388 0 On -site Parking (so 8,834 0 On -site Sidewalks (so 624 0 Other on -site (so 309 0 Off -site (sf) 18,895 0 Total (so: 43,674 0 * fruperoious area is defined as the built upon area including, but not liwited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. Form SWU-101 Version 8.07 Page 2 of 10. How was the off -site impervious area listed above derived? On -site survey and field investigations IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form SW401-Low Density Low Density Supplement Form SW401-Curb Outlet System Curb Outlet System Supplement Form SW401-Off-Site System Off -Site System Supplement Form SW401-Wet Detention Basin Wet Detention Basin Supplement Form SW401-Infiltration Basin Infiltration Basin Supplement Form SW401-Infiltration Trench Underground Infiltration Trench Supplement Form SW401-Bioretention Cell Bioretention Cell Supplement Form SW401-Level Spreader Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Form SW401-Wetland Constructed Wetland Supplement Form SW401-Grassed Swale Grassed Swale Supplement Form SW401-Sand Filter Sand Filter Supplement Form SWU-101 Version 8.07 Page 3 of 4 VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map athttp://h2o.enr.state.nc.us/su/msi maos.htm) Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form • Original and one copy of the Deed Restrictions & Protective Covenants Form • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soil report (SortS Veto Laze w,6 I" A)Aj=ATid6�) • Three copies of plans and specifications (sealed, signed & dated), including: - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished Floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firm): 31556/• PYrt�Ss/wuRL CiPtv(� Mailing Address: 'Pp. 130K /06 6 City: K/7"1)/ All Wle State: NC zip: C977y9 Phone: (aSa ) 0(p 3S2&(o Fax: ( ?s- ) Ztn/ - /760 Email:UAVa',A a/SSrLLA'ct�ej!✓avALGQa.O C4Y+7 VIII. APPLICANT'S CERTIFICATION I, (print or hype name of person listed in General Information, item 2) C L AAI rC- MCt certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that -the proposed project complies with the requirements of 15A NCAC 2H .1000. 5rqSignature: Date: Z%' Form SWU-101 Version 8.07 Page 4 of l3 Q r: yo7 • c,�i • , IrF ^. n e' o Permit Number: (to be provided by DWQ) Drainage Area Number: Wet Detention Basin Inspection and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. This system (check one): ❑ does ❑X does not incorporate a vegetated filter at the outlet. This system (check one): © does ❑ does not incorporate pretreatment other than a forebay. CV6(7eTx1r1Vt SwAcvu) Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of inspection and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential roblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin 1&M-Rev.2 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How 1 will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage. dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than s ra in . The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal growth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin I&M-Rev.2 Permit Number: (to be provided by D H'Q) Drainage Area Number: BMP element: Potentialproblem: How 1 will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 175 = feet in the main pond, the sediment shall be removed. When the permanent pool depth reads N feet in the forebay, the sediment shall be removed. Sediment Removal Bottom /A I .---------------- FOREBAY BASIN DIAGRAM (fill in the blanks) t fi Min. Sediment Storage Permanent Pool Elevation 2-2 Sediment Removal Elevation 55 _ Volum, - ------------`------------ ------ Bottom Elevation ';I• MAIN POND 141 Storage Form SW401-Wet Detention Basin 1&M-Rev.2 Permit N (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Projectname: PtQAT�S CWY Taut X40A14AIT PAV/Uan/ BMP drainage area number: +V1 , War- Print name: Date: Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, r0 A,— i o`; _ la ,/ice,- 11,t--( I , a Notary Public for the State of N)04t, _ EA r of 11 11. , County of ntu c , do hereby certify that L-=( Li1n F. personally appeared before me this •2i 1 day of L VL— lce 3 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL r p f My commission expires it /2/)-C) t : / Form SW401-Wet Detention Basin 1&M-Rev.2 rti G, } � y� ;; ., .. ~ �� J .. i r /� .�' ,� -L t" t �� J A s'[ •, ,, V V �� N i4' ❑. Stormwater Manaaement Narrative: The Pirates Cove Tournament Pavilion is an existing development on a 0.74 acre parcel located off of Sailfish Dr. within the Pirates Cove community in Manteo, Dare County. It has been determined that although the Pavilion site is less than 1.0 acre it shall be considered a part of the larger surrounding development and thus requires a stormwater management permit. The nature of the Pavilion's existing developmental activities result in the project being permitted pursuant with Rule .1005 (2) (b), High Density Projects located within one-half mile of and draining to SA waters with proposed built -upon area of greater than 25%. Through several initial site surveys and field investigations to record the existing construction conditions it has been determined that because of site limitations and minimal separation to the water table, it is difficult to provide the typically required on -site infiltration measures. It is the intent of this design then to propose an alternative system that will utilize a combination of existing and proposed on -site and off -site measures to provide a total control system that is in excess of that which is required for the 1.5 inch design storm event. An investigation into the developments existing receiving stormwater detention pond in conjunction w/ an open R/W swale adjacent to the site revealed that there available storage in excess of 5.0 times that which is required. It is the intent of this application, to the maximum extent possible, is to employ multiple best management practices to service the projects existing developmental activities. Site soils vary across the site and can be best described as Udorthents, or dredge spoil. These soils were placed on the site years prior to the Pavilion's development. The seasonal high water table within these soils varies from 12" below the surface along Sailfish Dr. to 32" below the surface along the rear of the site between the pavilion and marina. The Pavilion site's topography is flat with slopes ranging between 0-2%. There exists a 12,624 sq.ft. open air pavilion structure with 12,155 sq.ft of associative asphalt and gravel parking and drives, and other impervious improvements. The developments impervious coverage percentage is 77.16%. In its current state, runoff from the front half of the pavilion structure and portions of the asphalt and gravel parking area drain to an existing R/W swale located along Sailfish Dr. Runoff collected within this R/W swale is conveyed to the existing stormwater wet -detention pond located adjacent to the entrance to Pirates Cove. Stormwater runoff from the rear half of the pavilion structure and the site sheet flow across a 25' vegetative strip before either infiltrating into the marinas adjacent docks or flowing off into the surface waters. All developmental activities are to be designed to the maximum extent possible to conform with the requirements for application and issuance of permits for stormwater management systems pursuant with rules .1003 and .1005 in accordance with G.S. 143-215.1 and 15A NCAC 2H .0200 as set forth. These requirements are designed to control pollutants associated with stormwater runoff applicable to development of land for residential, commercial, industrial, or institutional uses. The developmental activities described herein were designed to the maximum extent possible to comply with the requirements as set forth for stormwater management within coastal counties Rule. 1005, section 2, subparagraph b: (i) No direct outlet channels or pipes to SA waters unless permitted in accordance with 15A NCAC 2H .0126; (ii) Control systems must be infiltration systems designed in accordance with Rule .1008 of this section to control the runoff from all surfaces generated by one and one-half inches of rainfall. Alternatives as described in Rule .1008(h) of this Section may also be approved if they do not discharge to surface waters in response to the design storm; (iii) Runoff in excess of the design volume must flow overland through a vegetative filter designed in accordance with Rule .1008 of the Section with a minimum length of 50 feet measured from mean high water of SA waters. To determine if the developments existing stormwater management system is appropriate with regards to its ability to service it's existing improvements, it is divided into (2) separate drainage areas. Calculations were performed utilizing existing coverages, both on and off -site, to determine if the size of the management measures provided within the drainage area are adequate. The following is an overview of the drainage characteristics of each of the (2) drainage areas, outlining the collection, conveyance, and treatment measures provided within. Drainage Area #1 For the purposes of permitting, this 1.62 ac. watershed is divided into two sub -regions, on -site and off - site. The following is a brief overview of each sub -region and how it's tributary runoff will be collected and conveyed to the drainage area's BMP, the existing wet -detention pond located at the entrance of the development. The on -site sub -region is 0.64 acres in area and encompasses 100% of the Tournament Pavilion's total 8 impervious coverage, including the existing open air pavilion structure and all of its associative asphalt and drives, improvements. As I Z 6%- gravel parking and and mist. concrete mentioned, these improvements have already been made and there are no plans for additional development. To collect runoff from the the pavilion's roof a system of subsurface french drains is being proposed around the western, southern, eastern sides of the building's foundation. To ensure the roof runoff is appropriately / captured, provisions in the form of back filling with landscaping river rock and/or Type 1 Sand and the construction of low diversion berms are made above the drain to promote infiltration into the system. Surface runoff from the development's surrounding parking and drive areas will be collected via /6¢ proposed drop inlets located at the four comers of the pavilion. These drop inlets will be tied into the french drain conveyance network which is proposed to discharge to the existing R/W swale located in front of the pavilion along Sailfish Dr. Additionally, portions of the gravel parking area located between the pavilion and the swale mentioned above currently sheet flow directly into the swale and there is no intent to change this. This R/W swale, which will be collecting all of the on -site runoff, as well as portions of off site, is hydraulically connected to the existing wet -detention pond by the provision of a drop inlet with a float actuated sump pump located within the Swale. The provision of this sump forces detention for pump within the swale thus allowing a measure of infiltration as well as / pollutant removal. As a result, this swale has been labeled as a "Stormwater Pre -Treatment Swale" and ( provides an order of relief in absence of the wet -detention ponds forebay. 2�62 e-F / The off -site sub -region is approximately 0.98 acres in area and encompasses 0.43 acres of surrounding off -site impervious improvements that also drain to the wet -detention pond. Runoff from this off -site drainage area either sheet flows directly into the wet -detention pond or is captured by surrounding Gl�.'ec X drop inlets that are also connected to the pond. 3,4,9 SSG (Please reference attachment B for Drainage Area Delineations) It has been determined that the existing wet -detention pond servicing drainage area #1 is large enough alone to manage 4.78 times the runoff associated with a 1.5" rainfall event. Additionally, with the provision of the "Stormwater Pre -Treatment Swale" noted above, and without considering infiltration or interstitial storage, there is a total open storage capacity available within the drainage area to manage 5.1 times that which is required for the development. (Please reference attachment Afar Wet Detention Pond Calculations) Drainage Area #2 This on -site drainage watershed is 0.1 acres in area and is composed of a 25' wide vegetated strip of land located between the pavilion building and marina docks. With the exception for a few elevated fueling stations and some landscaping stone around a fire hydrant this drainage area has no impervious surfaces. This area is considered a passive treatment measure and act as as a vegetative filter strip/buffer to adjoining surface waters for runoff from both within as well as any runoff that may not be captured in Drainage Area #1. (Please reference attachment B for Drainage Area Delineations) Based on the overall design of this development, stormwater runoff from existing impervious surfaces will receive treatment, to the maximum extent possible, in the form of vegetative conveyances and wet detention ponds. The intent of this design is to provide adequate pollutant filtration measures from stormwater runoff resulting from the proposed high -density pocket created with this development. Measures were designed to the maximum extent possible to treat runoff from the associated development in accordance with best management practices. With the provision of 3.5 times the required storage for the 1.5 inch design storm event it is expected that these measures will enhance the pollutant removal efficiency and provide sufficient protection to the adjoining surface waters. Stormwater runoff from all impervious surfaces will receive a form of pollutant and sediment removal as described in best management practices. 'Be following information is in conformance with the regulations as specified for high -density development: 1) Provision of a wet detention basin for stormwater storage and treatment of the 1.5 inch design storm event. 2) Provision of 5.1 times the required storage of the 1.5 inch design storm event. 3) Provision of pre-treatment through vegetative R/W swale. 4) Provision of infiltration through french drain conveyance system. An easement will be provided around the stormwater management wet -detention basin for the purpose of operation and maintenance. A drainage easement will be provided around the perimeter of the wet detention pond. Access is provided via Pirates Dr. 1) Accumulated sediment within the basin shall be removed semi-annually or when depth is reduced to 3/4 of the original design depth. (See individual wet detention basin supplement for proper levels and maintenance) 2) All vegetative conveyances shall be maintained to ensure proper functionality. 3) All French drain conveyances shall be maintained to ensure proper functionality. 4) Provision of back up sump pump w/ generator for possible failure of existing pump or power outage. ,Pirates Cove Tournament Pavilion Drainage Area #1 Wet -Detention Pond Calculations Stormwater Management Calculations Design Stonn Event 1.5 in. rainfall event Stormwater Management 15A NCAC 2H.1005 3(b) Soils Report Data Soil Type* Udorthents (Dredge Spoil) Infiltration Rate* (IR) 6.0 inlhr. Seasonal High Water TableElev.** 2.20 ft. foul *Taken front the Soil Survey Manual, U.S. Dept. of Agriculture **Data taken from On -Site Survey Data Collection Around Existing Pond Drainage Basin Area Data On -site Drainage Area 27777 sq.ft. 0.64 ac. Off -Site Drainage Area 42731 sq.ft. 0.98 ac. Total Drainage Area 70508 sq.ft. 1.62 ac. ' Sutiared ,.... Deserrptron Area tr! /. Factor ..'_' m.: 'ArU.lmpervious Area trr / Ary.Impervious Area (AC.)_.. Pavilion 12,624 1.00 12,624 0.29 On -site Asphalt Parking &Drives 2,388 1.00 Z388 0.05 On -Site Concrete 624 7.00 624 0.01 On -Site Gravel Parking & Drives 8,834 1.00 8,834 0.20 On -Site Landscaping Stone 309 1.00 309 0.01 Off -Site Impervious 18,895 1.00 18,895 0.43 Total Green Open Space I 26,834 0.00 0 0.00 9/3/2008 i orat arrange Area Ur 1 lu'bus.0 1.62 Calculated Impervious Coverage 43,674 1.00 Percent latpervious(I) 61.94 % Rv = .05+ .009(l) 0.61 Required Pond Volume (ft3) (PV)= (l.5"1l2")xR,xDA n 5,376 ft' Pond Depth (AVG.) 5.00 SAIDA (Use SAIDA Table for 90% TS.S Removal, 5.0' depth) 4.44% fond Area Required (SA) = DA x SAIDA 3,131 ft� Pond Data Surface Area Provided @ Permanent Pool Elevation (SA PP) 9,394 ft ` Surface Area Provided>Surface Area Req'd YES Existing Ground Elevation (approx.) 5.00 ft. nul +/- Pennanent Poo! Elevation (approx.) 2.20 ft. ntsl Depth of Temporary Pool Storage (PV/Sa M) 0.57 ft. Design Temp. Pool Elevation (TPet,.) 2.77 fi. nu! ` t1 ! 1111/1I/// Design Temporary Pool Surface Area (SAP) 9,394 ft \\SS11 \ Design Storage Volume Provided (SV) 5,376 ft' �y A7 �a Proposed Basin Overflow Elevation (O,n,.,�) 4.50 ft. nut z _ • Proposed Surface Area @ Oveerflow Elevation (SAo) 17,630 ft r� Storage Vohune Provided (TSV) 25,724 ft'- _ Ratio of Volume Provided to Required 4.78 Additional Storage Data (Swale located in front of Pavilion Site) / • • • \ Existing Ground Elevation (approx.) 4.5 h. Surface Area at Existing Ground Elevation 2,122 ft.r Bottom Elevation 3.3 A Surface Area at Bottom Elevation 444 ft Storage Provided 1,540 ft' Total Storage Volume Provided 27,263.60 ft' Total Storage Volume Provided>Storage Voltane Req'd YTS Ratio of Total Volume Provided to Required 5.1 Permit No. (to be provided by DWO) ®�� 02Of W A TF9Q >�g NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN 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. I.'PROJECT INFORMATION Project name Pirates Cove Tournament Pavilion Contact person Glenn Futrell Phone number (252) 473-6800 Date 91312008 Drainage area number #1 II: DESIGNJNFORMATION Site Characteristics Drainage area Impervious area % impervious Design rainfall depth Storage Volume: Non -SR Waters Minimum volume required Volume provided Storage Volume: SR Waters 1-yr, 24-hr runoff depth Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Minimum volume required Volume provided Peak Flow Calculations Is pre/post control of the 1-yr 24-hr peak flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm 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 Basin Elevations Basin bottom elevation Sediment cleanout elevation Bottom of shelf elevation Permanent pool elevation Top of shelf elevation Temporary pool elevation Volume and Surface Area Calculations SAIDA ratio Surface area at the bottom of shelf Volume at the bottom of shelf Permanent pool, surface area required Permanent pool, surface area provided Permanent pool volume Average depth for SAIDA tables Surface area at the top of shelf Volume at the top of shelf 70,508 ftz 43,674 ' fit' 61,9419073 % 1.5 in 5,376 ft3 25,724 ft3 A/A in ft3 ft3 ft3 ft3 '(/ (Y or N) in (unitless) (unitless) in/hr ft'/sec ft3/sec ft3lsec -2.80 1t AYG. 1.55 ft 3.50 ft 2.20 ft 4.50 ft 2.77 ft 4.44 ,(unitless) 9394.00 ftz 12212.00 ft3 3,131 ftz 9,394 ft OK 28,182 ft3 5 it OK C$ Velpa, /" p s4Vra APQmoxt.-tATeb 25724 ftz �r-,rk) 5724 ft3 Form SW401-Wet Detention Basin-Rev.3 Parts I. a 11. Design Summary, Page t of 2 Permit No. (to be provided by DWO) Forebay volume td ft' We r4*&5 A2ii i% 3:FW^ 6 ) Forebay % of permanent pool volume % Temporary pool, surface area provided 9,394 ft' Drawdown Calculations Treatment volume drawdown time Wo t.Ir! days ' p�/>�T?faC Treatment volume discharge rate ppr�jy ft'/s Pre -development 1-yr, 24-hr discharge — ft,/s Post -development 1-yr, 24-hr discharge ft'/s Additional Information ` Diameter of orifice — in /D "t7wVK d 1 Design TSS removal 90 % Basin side slopes Bulkhead :1 OK Vegetated shelf slope 13 :1 OK Vegetated shelf width 13 ft OK Length of flowpath to width ratio 3.57 :1 OK Length to width ratio 3.57 :1 OK Trash rack for overflow & orifice? ^/ (Y or N) Freeboard provided 1.7 it OK Vegetated filter provided? n -(Y or N) Design must be based on 90% TSS removal Recorded drainage easement provided? y (Y or N) OK Capures all runoff at ultimate build -out? y (Y or N) OK Drain mechanism for maintenance or emergencies Pump Form SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 2 of 2 j S'?, (tt:`a •L�5%? Y�C7t�:�' •b`tti.'•iC`Sr 3 1 Permit (to be provided by DWO) III':,REQUIREDITEMS,CHECKL15Tt�f, Xi ` r!'t 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 InMal Sheet No. 1'F of " t — 1. Plans 0" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), .! - Delineated drainage basins (' ), - Basin dimensions, ✓ POW 62 - Pretreatment system, -�a R �7 - High flow bypass system, ✓��/ 8 >'"�� C� - Maintenance access, . - Recorded drainage easement and public right of way (ROW), 7. -- - Overflow device, and N�� A 8 fcs fk0. oF,= i *I - Boundaries of drainage easement. . a 2. Partial plan It" = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, /V/-+ (S! er TMES ?g ) - Maintenance access, /ef 3 -Permanent pool dimensions, . — Petra - Forebay and main pond With hardened emergency spillway, '%^ (Y.8 7A-W4S cQcC, > a - Basin cross-section, %.- = e: a - Vegetation specification for planting shelf, and Filler strip. AI -A— (lf,S y�,ff_C tirr,1 1( 3. Section view of the dry detention basin It" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Intel and outlet structures. v/^ (y 8 nolle-1 rep) NA 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. :tVL a of A 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, / AVV**Vrl to verify volume provided. 9tt _BbsYa01"f 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. A 7. A construction sequence that shows how the wet detention basin will be protected from sediment until the �q�shts�n . entire drainage area is stabilized. .� 'I �/ 0kU94A**L1 8. The supporting calculations. A7*11CAN"o 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement. A/ 1* 10. A copy of the deed restriction. Form SW401-Wet Detention Basin-Rev.1 Part III. Required Items Checklist, Page 1 of 1 ARE7A J FL I A16,4 Tio AI --=----- n =- _-------^ �.---_-_---- i \ t � \ \ I)A-4 - OFF -9 A �Z rAe CoagtalEV0e 6 September 03, 2008 M CEVW ED Mr. Alton Hodge NCDENR, Water Quality Section SEN Mi 943 W Washington Sq. Mall Washington, NC 27889 p}�a DWQ—�p�� AR0 Dear Mr. Hodge, SUBJECT: PIRATES COVE TOURNAMENT PAVILION On behalf of Glen Futrell, Bissell Professional Group requests review of the proposed stormwater management plan in support of the Pirate's Cove Tournament Pavilion site. The submission of this package is an attempt to, the maximum extent feasible, address the existing Tournament Pavilion site developmental activities of a 0.74 acre parcel located off of Sailfish Dr. within the Pirates Cove community in Manteo, Dare County. The development of this site excluded an approved stormwater management permit as required in accordance with NCDENR 15A NCAC 2H.1000. The existing site development consists of a 12,600 s.f open air pavilion structure in conjunction with a gravel parking and drive area. It is our understanding, through discussions with yourself and the developer Mr. Glenn Futrell, the Pavilion site shall be considered a part of the larger common development and thus requires a stormwater management permit. The nature of the Pavilion's existing developmental activities result in the project requiring a permit pursuant with Rule .1005 (2) (b), High Density Projects located within one-half mile of and draining to SA waters with proposed built -upon area of greater than 25%. As part of the initial investigation process, several site visits were conducted to record the construction conditions in association with reviewing the potential for on -site stormwater management measures in an effort to meet state regulatory compliance. Several soil borings were advanced in several locations throughout the subject property to determine the feasibility of infiltration measures. This testing documented a maximum separation from the existing ground surface to the seasonal high water table at approximately 12", thus being insufficient to meet the minimum 24" vertical separation requirement for infiltration measures. A review of the existing collection and conveyance measures was conducted to determine whether they could be incorporated into the stormwater management design. Runoff from the on -site impervious coverage was determined to sheet flow across the existing parking area, into an existing roadside swale. Located within the swale is an existing drop inlet with mechanical sump pump. The pump conveys runoff, via a 2.5" diameter pipe to the existing aesthetic "Marlin Pond" located at the main entrance to the Pirate's Cove development. This pond is approximately 5'-10' in depth and encompassed by a peripheral composite bulkhead wall. A variable width vegetative shelf exists around the pond perimeter, approximately 12" above the identified permanent pool elevation. An additional study was performed on the tributary drainage area to this pond. It was determined that portions of the existing development access drives were being conveyed by either sheet flow or the previously described mechanical pumping device. Also documented were portions of runoff from the adjoining "Ship Store" development, in which it is understood, that this was covered under a separate permit and thus excluded from the tributary calculations. P.O. Box 1068 ■ 3512 N. Croatan Hwy. ■ Kitty Hawk, NC 27949 252-261-3266■ Fax:252-261-1760 0 E-mail: bpg@bissellprofessionalgroup.com — 2 — September 3, 2008 Pursuant to NCDENR 15A NCAC 2H.1005, for development activities located within V2 mile of and draining to SA waters or unnamed tributaries to SA waters, with permit control systems as being only infiltration -type, unless alternatives as described in Rule .1008 may be approved if they do not discharge to surface waters in response to the design storm. With the fact that this application is encumbered by the subject property and surrounding areas being developed, lack of adequate separation to the seasonal high water level and its proximity to SA waters, the approach is to utilize portions of the existing drainage infrastructure improvements to accommodate stormwater management for this facility. In order to achieve this, documentation has been provided that demonstrates that the existing control system can accommodate well in excess of the minimum required 1.5" rainfall event without any allowance for discharge to the adjoining surface waters. This approach has been reviewed and approved on other applications previously submitted by this office. The following briefly describes how this application demonstrates, utilizing Rule .1008 (h) Alternative Design Criteria for Design of Stormwater Management Measures, that provichng an equal or better stormwater control, protecting waters of the state and result in no increased potential for nuisance conditions; 1. The provision of collection and conveyance mechanisms to account for all runoff generated from the existing impervious surfaces associated with the developmental activities located on the subject property. 2. Accounting for off -site runoff that is tributary to the existing Marlin Pond to substantiate the proposed design. 3. Mimic the existing drainage system operation, in which it is understood has been functioning without any documented problems for a period of 24 months. 4. The provision of an approximate stormwater management volume storage amount of 5.1 times the minimum required 1.5" rainfall event. This equates to a total of 7.65" of rainfall runoff being accommodated with this application or a 25-yr -24 hr. design storm event. 5. Eliminating or significantly reducing the potential for overflow into the adjoining surface waters. 6. The provision of a back-up sump pump to be stored on -site in case of an operational failure of the existing pump mechanism. Since the existing developmental activities are currently constructed, the intent is to proceed with the permit review under the current stormwater management rules. -3— September 3, 2008 Attached are (3) copies of the general stormwater permit application, wet detention basin supplement, off -site supplement, signed and notarized operation & maintenance agreement form, system checklist, supporting calculations, stormwater management narrative and system design plans for your review. Additionally, the $505 permit application fee is being submitted to complete the application package. If you require any additional information or if we may be of assistance to you in any way, please do not hesitate to contact our office. We thank you for your time and consideration of this matter. Sincerely, e- Bissell Profession David M. Ryan, P Vice President of ROANOKE PROPERTIES August 29, 2008 Environment & Natural Resources Division of Water Quality Washington Regional Office 943 Washington Square Mall Washington, NC 27889 Subject: Stormwater Permit Application Sailfish Point Villas and Pavilion Building Pirate's Cove Manteo, NC Gentlemen: In 2006, plans were approved by the Town of Manteo for construction of three, 9 unit condo buildings and a pavilion (open shelter) on the Marina at Pirate's Cove. Two of the condo buildings and the pavilion were built in 2006. Stormwater designs were done for the condo buildings by J. Davis Architects and for the pavilion by the Bissell Professional Group. These stormwater designs were installed at the time of construction of these buildings in 2006. However, these designs were inadvertently not submitted to DWQ as required to obtain a stormwater permit. This absence of a permit was discovered recently while investigating some issues with another stormwater permit within Pirate's Cove. We sincerely apologize for the oversight and the breakdown in communication between the owner and designers in this instance. We wish to emphasize that these designed stormwater measures were implemented at the time of construction and therefore, no stormwater pollution has occurred. The design for the condo buildings included underground storm chambers that contains 100% of the roof top stormwater and are working very effectively. By copy of this letter and the attached permit applications, we are submitting these designs for your review. As stated above, the design for the system for the condos is by J. Davis Architects (Ken Thompson- 919-835-1500) and for the pavilion by Bissell Professional Group (David Ryan- 252-261-3266). The situation with these buildings was discussed with Mr. Al Hodge on August 21, 2008. We appreciate your review of these applications and, again, apologize for the delay in submitting this stormwater permit application. Very truly yours, G enn E. Futrell 1 Sailfish Drive • Manteo, North Carolina 27954 9 (252) 473-3700