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HomeMy WebLinkAboutSW7091009_CURRENT PERMIT_20100416STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. sw:z6 � 1 DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE 2 YYYYMMDD NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary April 16, 2010 NC Department of Corrections Attn: Mr. William N. Stovall 2020 Yonkers Road Raleigh, NC 27609 Subject: Stormwater Permit No. SW7091009 Bertie Correctional Institute High Density Stormwater Project Bertie County Dear Mr. Stovall: The Washington Regional Office received your completed stormwater application for the subject project on April 14, 2010. After reviewing your request and the plans and specifications it has been determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 21-1.1000. We are forwarding Permit No. SW7091009 dated April 16, 2010 for the subject project. This permit replaces all previous state stormwater permits for this site, and shall be effective from the date of issuance until April 16, 2020, and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit and in the submitted application. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory, hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. North Carolina Division of Water Quality Internal: www.ncwaterguality.ore 943 Washington Square Mall Phone: 252-946-6481 Washington, NC 27899 FAX 252-946-9215 An Equal OpportunitylAffirmative Action Employer — 50% Recycled110% Post Consumer Paper NorthCarojina Naturally Page 2 ol'9 NC Department of Corrections April 16, 2010 Page Two If you have any questions, or need additional information concerning this matter, please contact either Bill Moore, or me at (252) 946-6481. AcereJgLe-Z4�� Regional Supervisor Surface Water Protection Section cc: Hobbs, Upchurch & Associates Bertie County Planning/Inspections i/Washington Regional Office Central Files Page 3 of 9 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO North Carolina Department of Corrections Mr. William N. Stovall Bertie County FOR THE construction, operation and maintenance of (3) wet detention basins 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 Bertie County Correctional Institute located at Windsor, NC. This permit replaces all previous state stormwater permits for this site, and shall be effective from the date of issuance until April 16, 2020 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 systems have been approved for the management of stormwater runoff as described in Section 1.6 on page 4 of this permit. The �/ stormwater controls have been designed to handle the runoff from IA,62 evm%* acres of impervious area. IS. )7 P y-re-4 Bnr 3. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans and permit. Page 4 of 9 a 5 The tract will be limited to the amount of built -upon area indicated on page 4 of this permit, and per approved plans. The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the permitted stormwater control system. The following design criteria have been provided for the wet detention basins and must be maintained at design condition: a. Total Site Area: 159.31 acres b. Total Impervious Surfaces: 6.70 ac - Basin 1 3.29 ac - Basin 2 -4-6t ac - Basin 3 S./S a-c- C. Design Storm: 1.5 - inch d. TSS removal efficiency: 90 % e. Permanent Pool Surface Area Required: 25,608 sf - Basin 1 13,000 sf - Basin 2 23,260 sf - Basin 3 f. Permanent Pool Surface Area Provided: 32,533 sf - Basin 1 14,202 sf - Basin 2 23,613 sf - Basin 3 g. Storage Volume Required: 17,462 cf - Basin 1 18,886 cf - Basin 2 28,696 cf - Basin 3 h. Storage Volume Provided: 17,462 cf - Basin 1 21,746 cf - Basin 2 30,943 cf - Basin 3 i. Small Diameter Controlling Orifice: 2.5-in, Basin 1 2.0-in, Basin 2 2.5-in, Basin 3 j. Receiving Stream/River Basin: UT-Cashie River k. Classification of Water Body: C-sw 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. Page 5 of 9 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plans must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, filter media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what. actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 7. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 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. Page 6 of 9 d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 13. This permit shall be effective from the date of issuance until April 16, 2020. 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. Ill. GENERAL CONDITIONS 1. 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. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. Page 7 of 9 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 9. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 16 th day of April, 2010. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7091009 Page 8 of 9 Stormwater Permit No. SW7091009 Bertie Correctional Institute (3) Wet Detention Pond Systems Bertie 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 Complete this checklist for each system and include with Certification: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure elevations are per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. HOBBS, UPCHURCH & ASSOCIATES CONSULTING ENGINEERS 8262 Market St. -- Suite 201 WILMINGTON, NORTH CAROLINA 28411 PHONE: (910)-686-1212 FAX: (910)-686-1145 TO: Mr. lull Moore NCD1 NR-DWQ 943 Washington Square Mall Washington, NC 27889 The following item(s): ❑ Maps ❑ Certification ❑ Submittals ❑ Change Order LETTER OF TRANSMITTAL DATE: 10-20-11 HUA JOB #:DC0902 We are sending you: ® Attached ❑ Under Separate Cover via RECEIVED ❑ Specifications ❑ Drawings OCT 2 1 2011 ❑ Permit ® SW Pe f 4' n n RO # Copies Maf l Date Project No. Description 1 10-19-11 DC0902 Berrie Correctional Institute Stormwater Certification 1 10-19-11 DC0902 As -Built Plans Transmitted as Checked Below: ® For Approval ❑ Approved As Subnutted ❑ Resubmit ❑ I -or Your Use ❑ As Requested ❑ Approved As Noted ❑ Sign & Return ❑ Corrected ❑ For Review and Comment ❑ Prints Returned After Loan to Us ❑ Remarks: Bill, please see the attached stormwater certification for the Berrie Correctional Institute's Stormwater Modification that was approved on April 16, 2010. If you have any questions or comments please contact me and thanks again for all your help. Copy To: Signed: J oyd, M Page 8 of 9 Stormwater Permit No. SW7091009 Bertie Correctional Institute �3) Wet Detention Pond Systems ertie County Designer's Certification OCT 2 1 2011 D Q—VVi111 O I, John Barry King , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe eriodicall eekly/ full time) the construction of the project, Bertie Correctional Institute (Project) for William Stovall (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 Registration Number 270 Date 1 ZO SEAL 04 p�.E�ss..... Q�0 Y9<' SEAL 33270 yI' BARR-� �\'' Page 9 of 9 Complete this checklist for each system and include with Certification: Pond #1 ✓ 1. The drainage area to the system contains approximately the / permitted acreage. y 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. y 4. All roof drains are located such that the runoff is directed into the system. A'1A 5. The bypass structure elevations are per the approved plan. *1A 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. �78. All slopes are grassed with permanent vegetation. / 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. t/ 11. The permitted amounts of surface area and/or volume have been / provided. V 12. All required design depths are provided. —713. All required parts of the system are provided. �14. The required system dimensions are provided per the approved plans. Page 9 of 9 Complete this checklist for each system and include with Certification: Pond #2 ✓ 1. The drainage area to the system contains approximately the / permitted acreage. v 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. NIA 5. The bypass structure elevations are per the approved plan. 'VIA /6. The bypass structure is located per the approved plans. ✓ 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause / short-circuiting of the system. ✓ 11. The permitted amounts of surface area and/or volume have been provided. t/ 12. All required design depths are provided. NJ 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. Page 9 of 9 Complete this checklist for each system and include with Certification: Pond #3 ✓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. A''1A 5. The bypass structure elevations are per the approved plan. 'v'IA 6. The bypass structure is located per the approved plans. �7. A Trash Rack is provided on the outlet/bypass structure. V78. 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. —713. All required parts of the system are provided. ✓ 14. The required system dimensions are provided per the approved plans. f. ,, .. "iDWQUSEONLY Date Received Pee Paid Permit Number _ — !J Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post Construction (select all that apply), ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal,Stormwater Management Plan ❑ Other WQ M mt Plari: --;Ul c& In / 5LL State of North Carolina ; y_" 4iZ 6 J iivv c"' "y n�� epartment of Environment and Natural Resources �Erry CQrrol( i lDivision of Water Quality OCT 1 3 2009 // STORMWATER MANAGEMENT PERMIT APPLICATION FORM, This form may be photocopied for use as an original 't )f" q "t• 4 iSt ' 4. i 1. GENERAL INFORMATION 77r7'¢ -g 65a 1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plan specifications, letters, operation and maintenance agreements, etc.): j„„ P-'`5 - C ti ll� Bertie County Correctional Institute l✓i�r!'G.h. S+�vQ/� `i f4 I "]/(, - 3C�ao 2. Location of Project (street address): 218 Cooper Hill Road /2-5 2) 794- - Bq-Q( hero-.ixc t./z City: W indsor Counly:Bertie Zip:27983 3. Directions to project (from nearest major intersection): From the split from US 17 and US 13, take US 17 North till the intersection with Cooper Road turn right onto Cooper Road and site will be on the right. 4. Latitude:35* 58' 07" N Longit uie:76° 54' 30" W of the main entrance to the project. it. PERMIT INFORMATION: 1. a. Specify whether project is (check one): [-]New ®Modification b.lf this application is being submitted as the result of a modification to an existing permit, list the existing permit number02-1380 , its issue date (if known)Aug 9, 2005 and the status of construction: ®Not Started []Partially Completed* ❑ Completed* *provide a designer's certification 2. Specify the type of project (check one): ❑Low Density ®High Density []Drains to an Offsite Stormwater System ❑Other 3. If this application is being submitted as the result of a previously returned application or a letter from DWQ requesting a state stormwater management permit application, list the stormwater project number, if assigned, and the previous name of the project, if different than currently proposed, 4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ❑NPDES Industrial Stormwater ®Sedimentation/Erosion Control: 2 ac of Disturbed Area ❑404/401 Permit: Proposed Impacts b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number, issue date and the type of each permit:Building Addition - Bertie County Correctional Institute, Permit #: Berti-2010-01, August 13, 2009 477 Form SWU-101 Version 07Ju1y2009 P'•rge 1 0/ 111: CONTACT INFORMATION L a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee, designated government official, individual, etc. who owns the project): Applicant/Organization: North Carolina Denartment of Corrections Signing Official & Title:William N. Stovall, Director of Engineering b.Contact information for person listed in item la above: Street Address:2020 Yonkers Road City: State:NC Zip:27604 Mailing Address (if applicable):4216 Mail Service Center City:Raleigh State:NC Zip:27699 Phone: (919 ) 716-3400 Fax: (919 ) 716-3978 c. Please check the appropriate box. The applicant listed above is: ® The property owner (Skip to Contact Information, item 3a) ❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below) ❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and 2b below) ❑ Developer* (Complete Contact Information, item 2a and 2b below.) 2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the person who owns the property that the project is located on): Property Owner Signing Official&Title: W j;grn N. J1-oVA11 i Fit:., 13t0.e b.Contact information for person listed in item 2a above: Street Address: City: State: Mailing Address (if applicable): City: State: Phone: ( ) Fax: ( ) Email: 3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other person who can answer questions about the project: Other Contact Person/Organization: North Carolina Department of Corrections Signing Official &'ritle:lim Gates, Project Manager b.Contact information for person listed in item 3a above: Mailing Address:4216 Mail Service Center City:Raleigh State:NC Zip:27699 Form SWU-101 Version 07July2009 Page 2 of 7 ' Phone: (919 ) 716-3400 Fax: (919 ) 716-3978 4. Local jurisdiction for building permits: Point of IV. PROJECT INFORMATION Phone #: 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. Stormwater will be collected in Wet Detention Basins 2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued Date: ® Other: Stormwater Permit from Wetlands Unit Date: It. Identify the regulation(s) the project has been designed in accordance with: ® Coastal SW -1995 ❑ Ph II - Post Construction 3. Stormwater runoff from this project drains to the Roanoke River basin. 4. Total Property Area: 159.31 acres 5. Total Coastal Wetlands Area: 0 acres 6. Total Surface Water Area: 0 acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project Area+:159.31 acres Total project area shall be calculated to exclude the followingg the normal pool of impounded structures, the area between the batiks of streams and rivers, the area below the Untal High Water (NHW) line or Mean High Water (MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to calculate overall percent built upon area (BUA). Non -coastal wetlands landward of tlne NHW (orMHW) lice may be included in the total project area. 8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 9.52 % 9. How many drainage areas does the project have?3 (For high density, count 1 for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property area) 10. Complete the following information for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Form SWU-101 Version 07Ju1y2009 Page 3 of 7 IV. PROJECT INFORMATION 1. In the space provided below, briefly summarize how the stormwater runoff will be treated. Stormwater will be collected in Wet Detention Basins 2. a. If claiming vested rights, identify the supporting documents provided and,the date they were approved: ❑ Approval of a Site Specific Development Plan or PUD Approval Date: ❑ Valid Building Permit Issued0alte: ® Other: Stormwater Permit from Wetlands Unit ' Dater b.Identify the regulation(s) ® Coastal SW - 1995 , 3. Stormwater runoff frorn this 4. Total Property oject has be( Ph II " Post 7 O accordance wrth: JAN 2 8 w the Roanoke River basin. , - 5. Total Coastal Wetlands Area: 0 acres 6, Total Surface Water Area: 0 acres 7. Total Property Area (4) - Total Coastal Wetlands Area (5) - Total Surface Water Area (6) = Total Project if Area':159.31 tt acres p g Total project area shall be calculated to exclude fire follozoirilgg file nornnalpool of innpoui ded�rc�he.area,.- hehueen Hne banks of streams and rivers, the area below the "Normal High Water, (NHM line or Mc nr High Water (MHW) line, and coastal wetlands'iandward from the NHW (or MHI�'line)Tlie resultant project area is used to calculate overall percent built upon area (Bt.t%1)) Non -coastal wetlands landwar`'il of the NHW (m MHM line ruay be included in the total project area. // I j /l �U/ O (/ 8. Project percent of impervious area ,(Total IImU/`pv ious Area / Total Project Area) X 100 = 9.52 % 1j��\\ 9. How many drainage areas does the project have?3 (For high density, count I for each proposed engineered stormwater BMP. For low density and other projects, use 1 for the whole property area) 10. Complete the following infor I ation for each drainage area identified in Project Information item 9. If there are more than four drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. Basindnformation ; Drainage Area,h: Drainage Area'2.'. `Draina e Area 3' Draina e Area. Receiving Stream Name Cashie River Cashie River Cashie River Stream Class * QSw C;Sw C;Sw Stream Index Number * 24-2-1 24-2-1 24-2-1 Total Drainage Area (so 711,456 14'76 442,772 i0.r 527,427 a, On -site Drainage Area (sf) 711,456 442,172 527,427 Off -site Drainage Area (sf) 0 0 0 Proposed Impervious Area*' (so 0 0 24,090 % Impervious Area** total 41 133 43 Im ervious"Surface Area: Drainage Area 7 - Drainage Area 2 Draina e Area Drainage Area On -site Buildings/Lots (so 24,090 On -site Streets (so On -site Parking (so On -site Sidewalks (so Other on -site (sf) Future (so Off -site (so Existing BUA*** (so 291,852 6 143,313 3, 201,683 — Total (so: 291,852 143,313 225,773 Stream Class and Index Number can be determined at: httn://h2o.enr.state.ne.us/bints/reports/reportsWB.lrtrul Impervious area is defined as the built upon area including, but Plot limited to, buildings, roads, parking areas, Sidewalks, gravel areas, etc. Fonn SWU-101 Version 07July2009 Page 3 of Basin Information Drainage Area 1 Drainage Area 2 Drainage Area 3 Drainage Area Receiving Stream Name Cashie River Cashie River Cashie River Stream Class * C;Sw C;Sw C;Sw n Stream Index Number * 24-2-1 24-2-1 a 24-2-1 Total Drainage Area (so 711,456 475,240 %/ 517,87t1J`? On -site Drainage Area (so 711,456 475,240 _ (/ 517,871 Off -site Drainage Area (so 0 A 0 Z// /IN Co '�-' Proposed Impervious Area** s 0,�,r II `.7,863(%/ U ' 16,227 Impervious Area`* total //41,` Ih 11 132 1 �,� 42 II A kk 0 V II 1 .Impervious** Surface Area Draina elArea r Drainage Area 2 Draina e Area 3. DramaOn-site Buildings/Lots (so �� 7,863 � /n116,227 On -site Streets (so )f /} // JOn-site Parking (so /f-� cc (r )`Onsite Sidewalks (so (w� (l\\f _ �� LOther on -site (sf)Future (so f (� �� II _ mk,II A Off -site (so Y11 \V(/ U 11II `. t/ \- Existing BUA*** (so 291,852 Q 143,313 201,683 f f ))LVI Total (so: 291,852 ` 151,176 217,910 ° \\ * Stream Class and Index Number can be determined at: littp://h2o.enr.state.ncus/bints/reports/reportsWB.lttmt `* Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. *** Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that is to be removed and which will be replaced by new BUA. 11. How was the off -site impervious area listed above determined? Provide documentation. Projects in Union County: Contact DWQ Central Office staff to check if the project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements as per NCAC 02B .0600. V. SUPPLEMENT AND O&M FORMS The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded from http://h2o.enr.state.nc.us/su/bmp forms.htm. 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. A detailed application instruction sheet and BMP checklists are available from http://l12o.enr.state.nc.us/su/bmp forms.hhn. The complete application package should be submitted to the appropriate DWQ Office. (The appropriate office may be found by locating project on the interactive online map atht!p://h2o.enr.state.nc.us/su/msi maps.htm.) Please indicate that the following required information have been provided by initialing in the space provided for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions for each submitted application package from http://h2o.enr.state.nc.us/su/bmp forms.htm. Initials 1. Original and one copy of the Stormwater Management Permit Application Form. 45S 2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants yi$ Form. (if required as per Part VII below) 3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M >Si� agreement(s) for each BMP. 4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to http://www.cnvilelp.org/pages/onestopexpress.html for information on the Express program and the associated fees. Contact the appropriate regional office Express Permit Coordinator for additional information and to schedule the required application meeting.) Form SWU-101 Version 07Ju1y2009 Page 4 of 7 5. - A detailed narrative (one to two pages) describing the stormwater treatment/ managementfor the project. This is required in addition to the brief summary provided in the Project Information, item 1. 6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the rh mile radius on the map. 7. Sealed, signed and dated calculations. `J 8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including: a. Development/Project name. b. Engineer and firm. c. Location map with named streets and NCSR numbers. d. Legend. e. North arrow. I. Scale. g. Revision number and dates. h. Identify all surface waters on the plans by delineating the normal pool elevation of impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal waters, and any coastal wetlands landward of the MHW or NHW lines. • Delineate the vegetated buffer landward from the normal pool elevation of impounded structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters. i. Dimensioned property/project boundary with bearings & distances. j. Site Layout with all BUA identified and dimensioned. k. Existing contours, proposed contours, spot elevations, finished floor elevations. 1. Details of roads, drainage features, collection systems, and stormwater control measures. m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a qualified person. Provide documentation of qualifications and identify the person who made the determination on the plans. n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations. o. Drainage areas delineated (included in the main set of plans, not as a separate document). p. Vegetated buffers (where required). 9. Copy of any applicable soils report with the associated SHWT elevations (Please identify '11A elevations in addition to depths) as well as a map of the boring locations with the existing elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the project area clearly delineated. For projects with infiltration BMPs, the report should also include the soil type, expected infiltration rate, and the method of determining the infiltration rate. (Infiltration Devices submitted to WiRO: Schedule a site visit for DWQ to verifij the SHWT prior to submittal, (910) 796-7378.) 10. A copy of the most current property deed. Deed book: 818 Page No: 788 is$ 11. For corporations and limited liability corporations (LLC): Provide documentation from the NC AIA Secretary of State or other official documentation, which supports the titles and positions held by the persons listed in Contact Information, item 1a, 2a, and/or 3a per NCAC 2H.1003(e). The corporation or LLC must be listed as an active corporation in good standing with the NC Secretary of State, otherwise the application will be returned. http://www.secreta!y.state.ilc.us/Corporations/CSearch.aspx VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be provided as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and protective covenants forms can be downloaded from http://h2o.enr.state.nc.us/su/bml2 forms.htm#deed restrictions. Download the latest versions for each submittal. In the instances where the applicant is different than the property owner, it is the responsibility of the property owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring that the deed restrictions are recorded. By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and protective covenants for this project, if required, shall include all the items required in the permit and listed on the forms available on the website, 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 NC DWQ and that they will be recorded prior to the sale of any lot. Form SWU-101 Version 07July2009 Page 5 of VIII. CONSULTANT INFORMATION AND AUTHORIZATION Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as addressing requests for additional information). Consulting Engineer:leff Thompson, P.E. Consulting Firm: Hobbs, Upchurch & Associates Mailing Address:8262-201 Market Street City:Wilmington State:NC Zip:28411 Phone: (910 ) 686-1212 Emaii:jthompson@hobbsuochurch.com Fax: (910 ) 686-1145 IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, itenn 2 has been filled out, complete this section) 1, (print or type name of person listed in Contact Information, item 2a) N/A , certify that I own the property identified in this permit application, and thus give permission to (print or type none of person listed in Contact Infornation, item la) with (print or type name of organization listed in Cachet Information, itenn lb) to develop the project as currently proposed. A copy of the lease agreement or pending property sales contract has been provided with the submittal, which indicates the party responsible for the operation and maintenance of the stormwater system. As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including the assessment of civil penalties of upto$25,000 per day, pursuant to NCGS 143-215.6. Signature: W A�wrM... y)- /�bva Date: 9 /11 toy( IINe�r}Ill Ca.rT7a a Notary Public for the State of 1 a County of Jo k 06+pn do hereby certify that (Q % /1 ,z r A), 6f'oV¢ i f personally appeared before me this v7) day of J3ee9_� •j ADO and a mowledge the du ce 'on of application for a stormwater permit. Witness my hand and official seal, s� SEAL My commission expires xo? -'s, z —// ' ' ha Form SWU-101 Version 07July2009 Page 6 of I X. , APPLICANT'S CERTIFICATION 1, (print or type none of person listed in Contact Information, item 2) William N. Stovall 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 the applicable stormw/at`er rules under 15A�N•CAC �2�H .1000, SL 2006-246 (Ph. II - Post Construction) or SL 2008-211. Signature: 2 .ti— Yi- AS6'.&M Date: O I, u=e�'trll-a —94 r4U� a Notary Public fortheState of A)or A ar oh;gA, County of J V k 10, 'I b n do hereby certify that L), 16 a uw AJ S 4-o ✓Q I / personally appeared before me thisv2 day of 6e pal- .2009 , an owledge the di ntiongf the application for a stormwater permit. Witness my hand and official seal, SEAL My commission expires a/ -0 17 Donn SWU-101 Version 07July2009 Page 7 of Fss-not/zssi JEFFREY SCOTT THOMPSON 08627978M 2130 399 SHOREPOINT DRIVE WILMINGTON, NC 28411 A ME � /7��/�/l�4 �/!/per 9r" �� � —I)OLLARS 8 ' State Em loyeeS' Credit Union- _ Wilmington, North Carolina MEMO Z21 1:253L7704911:086279788850 OCT 1 3 26u9 HOBBS, UPCHURCH & ASSOCIATES CONSULTING ENGINEERS 8262 Market St. -- Suite 201 WILMINGTON, NORTH CAROLINA 28411 PHONE: (910)-686-1212 FAX: (910)-686-1145 TO: Nlr. Satnir Dumpor NCDI3NR-DWQ 943 Washington Square Mall Washington, NC 27889 The following item(s): ❑ Maps ❑ Certification ❑ Submittals ❑ Change Order LETTER OF TRANSMITTAL DATE: 10-12-09 HUA JOB #:DC0902 We are sending you: OCT 13 2009 ® Attached ❑ Under Separate Cover via IPSB.1 _�AiAR. ❑ Specifications ❑ Permit ❑ Drawings ® SW Permit Application # Copies Mat'l Date Project No. Description 1 10-12-09 DC0902 Check for $505 for Review 2 10-12-09 DC0902 Set of SW Plans 2 9-21-09 DC0902 SWM Application 2 9-21-09 DC0902 3 Wet Detention Basin Suppliments 2 10-12-09 DC0902 Narrative and Calculations Transmitted as Checked Below: ® For Approval ❑ Approved As Submitted ❑ Resubmit ❑ For Your Use ❑ As Requested ❑ Approved As Noted ❑ Sign & Return ❑ Corrected ❑ For Rcview and Comment ❑ Prints Returned After Loan to Us ❑ Remarks: Copy To: Signed: Y(Y( If0y Name: WINDSOR SOUTH Location: 035° 58' 23.11" N 076' 54' 09.96" W NAD27 Date: 7/28/2009 Caption: Bertie County Correctional Instittue Scale: 1 inch equals 2000 feet Moore, Bill From: Moore, Bill Sent: Thursday, April 08, 2010 3:16 PM To: HUA Subject: Bertie Correctional Facility Good Afternoon Jeff, I started drafting the sw permit and tried to pull together all the pieces needed to make the sw application package complete. With the info on hand, I can finish the draft; however, we need some minor tweaking to make the package complete. Please provide the following info/explanations; or call me if you have questions: 1) Need to complete supplement sheets for all (3) ponds with revised numbers, along with O&M signed by William Stovall. (These forms were provided in October 2009; but the # s changed) 2) Plan sheet 7 indicates seeding for all ponds with trees on perimeter; plan sheet 12 provides a vegetation plan for Pond 3, which is much different from veg plan shown on Sheet 7. Let's discuss. 3) Stormwater bypass water from Pond 1; need calculations/discussion to verify non -erosive velocity/needs downstream protection ? 4) Your cals show that Pond 2 does not meet minimum surface area requirements; it appears to be close. Since regarding was involved, I thought we discussed enlarging pond to meet min. surface area ? 5) Sheet 12, veg plan should speak to fertilizer/lime requirements. I have the permit dated for 4/15. Can we turn all this around that quickly ? In case you miss me at the office, call me on my personal cell. 1 ,, , �. M� L. - � ., .� .. .. :i.::...,'i !� Hobbs, Upchurch & Associates, P.A. Consulting Engineers 8262 Market St. - Suite 201 • Wilmington, NC 28411 March 24, 2010 Mr. William J. Moore I Enviromnental Engineer NCDENR 943 Washington Square Mall Washington, NC 27889'r�s=:-� k. Re: North Carolina Department of Corrections MAR 3 12010 Bertie County Correctional Institute Building Addition Stonnwater Revisions Submittal SW7091009 ti Dear Mr. Moore, This submittal is to update you and NCDENR about a revision we have done to Pond 3. Due to prior overflows in the storm drain system draining to Pond 3, we have run some models on trying to case the potential for more overflowing. From these models we have determined that lowering Pond 3 one foot greatly helps the situation. Therefore Pond 3 has been lowered by 1 foot and now has a normal pool elevation of 22' FMSL. Attached in this subtnittal is a set of updated full size plans, updated Pond 3 calculations, and 2 copies of the revised pages 1 and 2 of Pond 3's Wet Detention Basin Supplement and page 3 of Pond 3's Wet Detention Basin O&NI Agreement. If you should have any questions with respect to this information, please do not hesitate to contact me. Sincerely, 1-I01313S, UPCI-I URCI-I & ASSOCIATI� S, P.A. e � Joe Boyd Wilmington, NC -Telephone 910-686-1212 . Fax 910-686-1145 . email: jboyd@hobbsupchurch.com Southem Pines . Charlotte Permit (to be provided br DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT — POND 1 This form may be photocopied for use as an original APR 14 2010 DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. 1. PROJECT INFORMATION Project Name: Bertie Correctional Institution Contact Person: Jeff Thompson, PE Phone Number: (910) 686-1212 For projects with multiple basins, specify which basin this worksheet applies to: Pond 1 elevations Basin Bottom Elevation 20.0 ft. (floor of the basin) Permanent Pool Elevation 24.0 ft. (elevation of the orifice) Temporary Pool Elevation 24.5 ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area 32,533 sq. ft. (water surface area at the orifice elevation) Drainage Area 1633 ac. Impervious Area 6.70 ac. i volumes Pennanent Pool Volume 89.230 cu. ft. Temporary Pool Volume 17 462 cu. ft. Forebay Volume 21,370 cu. ft. Other parameters SA/DA 1 3.6 Diameter of Orifice 2.5r in. Design Rainfall 1.0 in. Design TSS Removal2 90, % (on -site and off -site drainage to the basin) (on -site and off -side drainage to the basin) (combined volzone of main basin and.forebay) (volume delained above the permanent pool) (approximately 20% of total volume) (surface area to drainage area ratio.fi•om DNrQ table) (2 to .i day temporary pool draw -down required) (mininnon 85% required) Forin SWU-102 Rev3.99 Pagel of4 Footnotes: When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for nonstandard table entries. 2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal. i 11. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section:15 A NCAC 214.1008. Initial in the space provided to indicate the following design 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. Applicants Initials .�6115 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). %$ b. The forebay volume is approximately equal to 20% of the basin volume. - 5S� c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. $ e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) aSR f. The basin length to width ratio is greater than 3:1. .N655 g. The basin side slopes above the permanent pool are no steeper than 3:1. _6Y h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). SroiS i. Vegetative cover above the permanent pool elevation is specified. Isis i. A trash rack or similar device is provided for both the overflow and orifice. y5g k. A recorded drainage easement is provided for each basin including access to nearest right-of-way. _�6$ 1. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified prior to use as a wet detention basin. 'WIS m. A mechanism is specified which will drain the basin for maintenance or an emergency. III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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 X does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from' the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). 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 3.75 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3.0 feet in the forebay, the sediment shall be removed. Sediment Re val El. 22.0 75% Bono: Ele tion 21 .0 25%a FOREBAY BASIN DIAGRAM (lilt in the blanks) I Permanent Pool Elevation 25 n 75% Sediment Removal Elevation 21.2i_ _ _1 i\ Bottom Elevation 20.0 2 25°/u / MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall he minimized to the maximum extent practical. Form S WU-102 Rev 3.99 Page 3 of 4 All components of the wet detention basin system shall he maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the seven 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: William N. Stovall, PE Title: Director of Engineering, Central Engineering Division, NC Department of Correction Address: 2020 Yonkers Road, Raleigh, NC 27609 Phone: 919/716-3400 Signature: W e. Y1 • /J�e, 4 2 i Date: Qtn. - l Z , AcC o Note: The legally responsible party should not be a homeowners association unless inure than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, , %5g) AA 001EY'S , a Notary Public for the State of Nm4h CeIyO1lt(L County of jJJAA- ; do hereby certify that Wi l l j(,t,yit 1S alw'il I personally appeared before me this 13 lh day of /1lJI'i ILIC , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, PN iM I R 0G � F�i� CO u , NOTARY — PUBLIC 2\ 0ti�s SEAL My commission expires Apl j I _ W Nil Form SWU-102 Rev 3.99 Page 4 of 4 Permit 1. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT - POND 2 P�'`� 4 2010 This form;may be photocopied for use as an original4;v� DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes an application form, a wet detention basin supplement for each basin, design calculations, and plans and specifications showing all basin and outlet structure details. I. PROJECT INFORMATION Project Name: Bertie Correctional Institution Contact Person: Jeff Thompson, PE ; Phone Number: (910) 686-1212 For projects with multiple basins, specify which basin this worksheet applies to: Pond 2 I elevations Basin Bottom Elevation 20.0 ft. (floor of the basin) Permanent Pool Elevation 24.5 ft. (elevation of the orifice) Temporary Pool Elevation 25.8 ft. (elevation of the discharge structure overfovy) areas SR Permanent Pool Surface Area 14,202 sq. ft. (water surface area at the orifice elevation) Drainage Area 10.15 ac. (on -site and off -site drainage to the basin) Impervious Area 3.29 ac. (on -site and off -side drainage to the basin) volumes Per anent Pool Volume 35,040 cu. ft. (combined volume of main basin and forebay) 1b' S&c I�Ln') Te rpdrary Pool Volume 21,746 cu. ft. (volume detained above the permanent pool) Forebay Volume 7,465 cu. f1. (approximately 20% of total volume) I Other parameters SA/DA 1 Diameter of Orifice Design Rainfall Design TSS Removalz 2.94 2.0 in. 1.5 in. 90 % (surface area to drainage area ratio.frorn DII'Q table) (2 to 5 day lempormy pool drain -down required) (ininitn in 85% required) Form S W U-102 Rev 3.99 Page] of 4 Footnotes: When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for nonstandard table entries. x In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide 90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90%TSS removal. i 11. REQUIRED ITEMS CHECKLIST The following checklist outlines design, requirements per the Stormwater Best Management Practices Manual (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design 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. Applicants Initials a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). �$ b. The forebay volume is approximately equal to 20% of the basin volume. �56 c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. SSR� e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) f. The basin length to width ratio is greater than 3:1. �S g. The basin side slopes above the permanent poo I are no steeper than 3:1. NSti It. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). -�S3 i. Vegetative cover above the permanent pool elevation is specified. �53 i. A trash rack or similar device is provided for both the overflow and orifice. 5515 k. A recorded drainage easement is provided for each basin including access to nearest right-of-way. I. If the basin is used for sediment and erosion control during construction, clean out 6 of the basin is specified prior to use as a wet detention basin. m. A mechanism is specified which will drain the basin for maintenance or an emergency. 111. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT 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 X does not incorporate pretreatment other than a forebay. I'ormSWU-102 Rev3.99 Page 2of4 I Maintenance activities shall be performed as follows: After every significant runoff producing rainfall event and at least monthly: a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). 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, 3.37 feet in the main pond, the sediment shall be removed. i When the permanent pool depth reads' 3.37 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 94 5 Sediment Ret rval EI. 2 1. 13 75% 75% Bottom Etc lion 20.0 25°� _ _ _ _ Sediment Removal Elevation 21.11 Bottom Elevation 90 0 2 25% / FOREBAY MAIN POND I 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall he minimized to the maximum extent practical. Form SWU-102 Rev 3.99 Page 3 of All components of the wet detention basin system shall he maintained in good working order. I acknowledge and agree by my signature below that 1 am responsible for the performance of the seven 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: William N. Stovall, PE Title: Director of Engineering, Central Engineering Division, NC Department of Correction Address: 2020 Yonkers Road, Raleigh, NC 27609 Signature: LU t QQt n Y, Y?- Date: aclu Note: The legally responsible party should not be a homeowners association unless inure than 50% of the lots have been sold and a resident of the subdivision has been named the president. 1, )l.{;iOV M. 0yr.5 a Notary Public for the State of 4,*-1 ("('tIc1I no- County of W(au , dohereby certify that WI 10.1M N. Jin, I1 personally appeared before me this _ day of 4i i I 01 b and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, i IRI0 c``9�: �J tP� NOTARY — PUBLIC 2J 0 SEAL My commission expires Q n I o �6l1 Form SWU-102 Rev 3.99 Page of Permit No. (to W provided by DWD) 20F W A 7-f;9 NC ENR o� 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 III) must be printed, filled out and submitted along with all of the required information. Project name Battle County Correctional Institute Contact person Jeff Thompson, PE Phone number 910-6861212 Date 3116/2010 Drainage area number POND 3 Drainage area Impervious area, post -development % impervious Design rainfall depth Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' mnoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr ronoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the 1yr 24hr storm peak Flow required? 1-yr, 24-hr rainfall depth Rational C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr stonn 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 Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the pen. pool elevation) Top of 10ft vegetated shelf elevation Bottom of 1Oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the state -required temp, pool? Elevation of the top of the additional volume 527,427 rye 225,773 It 42.81 % 1.5 in 28,696 ft3 30,943 ft3 ft3 It ft3 If It Y (Y or N) 3.1 in OK OK, volume provided is equal to or in excess of volume required. 77.00 (unitless) 87.00 (unitless) 5.21 inlhr OK 14.03 ft3lsec 3.87 ft3lsec -10.16 Pier, 23.10 fmsl 22.00 ftnsl 22.00 fmsl 22.50 fmsl 21.50 fmsl 18.50 fmsl 17.50 fmsl 1.00 ft N (Y or N) 23.1 fmsl OK tr ApR 14 2010 Form SW401-Wet Detention Basin-Rev.8-9117I09 Parts I. a II. Design Summary, Page 1 or 2 Permit No. (to be provided by DWO) IIf'.DESIGN'INFORMATION.. Surface Areas Area, temporary pool Area REQUIRED, permanent pool SAIDA ratio Area PROVIDED, permanent pool, A.-P. Area, bottom of 1011 vegetated shelf, Am snmr Area, sediment cleanout, top elevation (bottom of pond), AMd Volumes Volume, temporary pool Volume, permanent pool, Vp,,,, via Volume, forebay (sum of forebays if more than one forebay) Forebay %of permanent pool volume SAIDA Table Data Design TSS removal Coastal SAIDA Table Used? Mountain/Piedmont SAIDA Table Used? SAIDA ratio Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) Volume, permanent pool, Vp, .. Area provided, permanent pool, A.-. Average depth calculated Average depth used in SAIDA, d„, (Round to nearest 0.511) Calculation option 2 used? (See Figure 10-2b) Area provided, permanent pool, A._po, Area, bottom of 1 Oft vegetated shelf, A. , 30,505 ft'23,260 ft2 I 4.41 (unitless) 23,613 ft� �K 18,773 13,183 ttv I 30,943 ft' OK 58,478 ft' 12,045 ft' 20.6% % OK 90 % Y (Y or N) N (Y or N) 4.41 (unitless) N (Y or N) 58,478 It' 23,613 ft` It It Y (Y or N) 23,613 to 18,773 fit` Need 3It min. Area, sediment cleanout, top elevation (bottom of pond), A., 13,183 ft' 'Depth' (distance btw bottom of loft shelf and top of sediment) 3.00 It Average depth calculated 3.43 It OK Average depth used in SAIDA, d., (Round to nearest 0.5ft) 3.4 It OK Drawdown Calculations Drawdown through orifice? Diameter of office (if circular) Area of orifice (if -non -circular) Coefficient of discharge (Cu) Driving head (Ha) Drawdown through weir? Weir type Coefficient of discharge (C,) Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Storage volume discharge rate (through discharge orifice or weir) Storage volume drawdown time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of towpath to width ratio Length to width ratio Trash rack for overflow & orifice? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Capures all runoff at ultimate build -out? Drain mechanism for maintenance or emergencies is: Y or N) in j 2.50 in r/ I in' 0.60 (unitless) 0.50 It N (Y or N) 14.03 It Ned 12.10 ft/sec 0.10 ft'/Sec 3.34 days 3 :1 10 :1 10.0 H 5 :1 5.0 :1 Y (Y or N) 5.9 ft N (Y or N) Y (Y or N) Y (Y or N) OK, draws down in 2-5 days. OK OK OK OK OK OK OK OK OK OK Form SW401-Wet Detention Basin-Rev.8-9I17I09 Pans I. b II. Design Summary, Page 2 of 2 Permit No. (to be provided by DWO) III. REQUIRED 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. I Pagel Plan Initials Sheet No. -15 2, 3,8 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. x� (� 2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing: - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section'; - Vegetation specification for planting shelf, and - Filter strip. tcQ (� 3. Section view of the wet detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. 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. GALCS 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay, to verify volume provided. 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. Lf11 S 7. The supporting calculations. A T CX IM 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. �3 N'1A 9. A copy of the deed restrictions (if required). "m 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. i Form SW401-Wet Detention Basin-Rev.8-9117I09 Part III. Required Items Checklist, Page 1 of 1 Permit Number: (to be provided by DWQ) Drainage Area Number: Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record ion 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 ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. 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 operation 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: Potentialproblem: How I will remediate theproblem: The entire BMP Trash debris is present. Remove the trash debris. The perimeter of the wet detention basin Areas of bare soil and/or erosive,gullies have formed. Regrade the soil if necessary to 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 O&M-Rev.4 Page 1 of 4 Permit Number: (to be provided by DIVQ) Drainage Area Number: BMP element: Potentialproblem: How I 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 spraying. 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 treatment area Sedimenthas 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). Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I 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 appropriate professional Make all needed repairs. shows that the embankment needs re air. if applicable) 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 33:5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 3.5 feet in the forebay, the sediment shall be removed. Sediment Removal Bottom 18.5 1 ----------------- FOREBAY BASIN DIAGRAM ill in the blanks) ' fl Min. Sediment Storage Permanent Pool Elevation 22.0 Pool Sediment Removal Elevation 18.5 volum, --- ------------ ------------ ------ Bottom Elevation MAIN POND 1-ft Storage Form SW401-Wet Detention Basin O&M -Rev.4 Page 3 of 4 Permit Number: (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. Project nanie:Bertie County Correctional Institute BMP drainage area number:Pond 3 Print name:William N. Stovall, PE Title:Director of En ing eering, Central Engineering Division, NC Department of Corrections Address:2020 Yonkers Road, Raleigh, NC 27609 Phone:919-716-3400 Signature: 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, JIA.SC1,i 1 ih. Rt;C�Ci S a Notary Public for the State of nlmd-h (&yc.G11a County of VQoVj, do hereby certify that *mmayyl N. jtbVAl I personally appeared before me this 0"I day of ; I A010 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, ROG _j 'Pf N01PARY PUBUG 2� a: %oyNs iONI Co SEAL My commission expires 'Ap I101 U ll Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4