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HomeMy WebLinkAboutSW7080214_CURRENT PERMIT_20080228STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW -7 DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE�� YYYYM M D D \O�QF W fi rF9PG Michael F. Easley, Grog 0 William G. Ross Jr., Secretary r� ➢' North Carolina Department of Environment and Natural Resources l O C Coleen H. Sullins, Director Division of Water Quality February 28, 2008 Burton Farm Development Company, LLC Attn.: Charles J. Hayes, Jr. — Managing Member C/o Kitty Hawk Land Company PO Box 229 Kitty Hawk, NC 27949 Subject: Stormwater Permit No. SW7080214 Burton Farm Village Pool Clubhouse High Density Project Pamlico County Dear Mr. Hayes: The Washington Regional Office received a complete Stormwater Management Permit Application for Burton Farm Village Pool Clubhouse on February 14, 2008. 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. SW7080214 dated February 28, 2008, for the construction of the subject project. This permit shall be effective from the date of issuance until Feb uary 28, 2018, 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 sixty (60) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Samir Dumpor, or me at (252) 946-6481. e Sinc rely, AI odge Regional Supervisor Su ace Water Protection Section AH/sd: , J:\WPDATA\WQS\ State SW-SD\Permits — Wet Pond \SW7080214 cc: Bobby Billingsley, PE, Thomas Engineering, PA Pamlico County Building Inspections Washington Regional Office Central Files North Carolina Division of Water Quality Internet: rr�ca.nC�culen�n'llitr oreore One 943 Washington Square Mail Phone (252) 946-6481 North Carolina Washington, NC 27889 Fax (252)946-9215 Naturally An Equal Opportunity/Affirmative Action Employer -50%Recycled/10% Post Consumer Paper �/{'K6 L " State Stormwater Management Systems Permit No. SW7080214 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 Burton Farm Development Company, LLC Burton Farm Village Pool Clubhouse Pamlico County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until February 28, 2008, 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 on page 3 of this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 73,770 square feet of impervious area. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. 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. Page 2 of 7 State Stormwater Management Systems Permit No. SW7080214 6. The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: 4.09 b. Total Impervious Surfaces, ft2: 73,770 C. Pond Depth, feet: 8.0 d. TSS removal efficiency: 90% e. Permanent Pool Elevation, FMSL: 29.0 f. Required Permanent Pool Surface Area, ft2: 6,420 g. Provided Permanent Pool Surface Area, ft2: 7,500 h. Temporary Storage Elevation, FMSL: 30.50 i. Required Storage Volume, ft3: 7,276 j. Provided Storage Volume, ft3: 14,554 k. Controlling Orifice: VO pipe @ el. 29.0 I. Receiving Stream/River Basin: Mill Creek / Neuse M. Stream Index Number: 27-113 n. Classification of Water Body: "SC; Sw; NSW" II. SCHEDULE OF COMPLIANCE The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance 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 outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet 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, Page 3 of 7 State Stormwater Management Systems Permit No. SW7080214 activity, name of person performing the work and what actions were taken 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. 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. 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. Access to the stormwater facilities shall be maintained via appropriate easements at all times. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to any item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease or sale of all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 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 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 Page 4 of 7 State Stormwater Management Systems Permit No. SW7080214 submit a formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. 7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 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 February 28, 2008. 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 28th day of February, 2008. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Stormwater Permit No. SW7080214 Page 5 of 7 State Stormwater Management Systems Permit No. SW7080214 Burton Farm Village Pool Clubhouse Stormwater Permit No. SW7080214 Pamlico 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 A 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. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: Signature Registration Number Date SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW7080214 Certification Requirements: 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 outlet/bypass structure elevations are per the approved plan. 6. The outlet structure is located per the approved plans. 7. 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. Required drawdown devices are correctly sized per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Washington Regional Office Pamlico County Building Inspections Page 7 of 7 D W Q USE ONLY Date Received Fee Paid Permit Number s State of North Carolina RECEIVED Department of Environment and Natural Resources FEB 14 2003 1 Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM DWQ-WARD Thus form maybe photocopied foruse as an original L GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): $0.2r0.J O'�;4e/y 0EVE4-0A06!-7_ C~,eAW4 44 G 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): CA144u. r T .!/•i r �s 7P - in rf gGr,rd ••� E.•�aF2 3. Mailing Address for person listed in item 2 above C. /a /L'i7%y /�,q-wK L�.✓O U..!Pi A14, P O. Qa1c ZZ city: A- r 7r 'Y ii/h-,K State: .v e zip: 7-7 S' ylS Phone: { 2 s 2 ) ZZ / y/-7 / Fax: { z f Z ) zG/. 2 a 3,3 Email! L P_,t �wq�•�G� 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): 4 Vow 7-0.✓ �/Ie k f/iLcR GE /��•� CL..ud//Ju.SG 5. Location of Project (street address): off Or' C7u.C7o„J ff%l2it+ sQrAO City: Nl�t County: /°*�" L/ G o 6. Directions to project (from nearest major intersection): i v fEjPlEc f/a.r o'/= Nc -Co 6 Cl e-J GA/lws .Pv) 7704&4�4- &OW&X 2-1-0-0 'r O.✓ 4714ri.r <AiC.N .eoAO. TuOf.✓ Q0,6&.,- ONE 4.0L¢4. ! „ sroydWr v.Q.rEes od 7. Latitude: 3,s 0 e • / 3 rr Longitude: 76 7`f S t✓ of project rlYE 8. Contact person who can answer questions about the project Nvne:9441eY 43lLL/.Y6f1,d4y�109�- Telephone Number: (25-7- ) 697 272.7 Email: godeyarLc_ i,✓GfG1;Y( -/1/e,ytA.4.Gent li. PERMIT INFORMATION: 1. Specify whether project is (check one): [ ew ❑Renewal ❑Modification Form SWU-101 Version 8.07 Page I of �oh� T1nr,W.45 =ill 252-S7j- SSSS / 4 2. If this application is being submitted as the result of a renewal or modification to an existing pern'dt, list the existing permit number and its issue date (if known)—. 3. Specify the type of project (check one): ❑Low Density [?-sigh Density ❑Redevelop ❑General Permit ❑Universal SMP ❑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. Ill. PROJECT INFORMATION 1. In the space provided below, sununarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. TRhasEoasE� 114 STa trti DX V,%) 0 0 A 65- ANj> V / fe Ta ii PkaPasEy wETTE"✓fiA,✓ BQ�i.✓. OLTLE� �a•�o PR�..� E1✓!P Y aAy rO s.rE TLA--✓Ar 2. Stormwater runoff from this project drains to the Al&-f F River basin. 3. Total Site Area: 0"- a F acres 4. Total Wetlands Area: a �' f acres 5. 100' Wide Strip of Wetland Area: w1A acres (not applicable if no wetlands exist on site) 6. Total Project Area"*: a (acres 7. Project Built Upon Area: l 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 nslLi- C.dEE,C Stream Class & Index No. G ' S w ' IJJ-4' Drainage Area (sf) 17 V. 3 S� Existing Impervious' Area (sf) O Sim Proposed Impervious"Area (sf) 'j,3 -7D .ri % Impervious" Area (total) *,, , Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (so 3 3 0 • s' f On -site Streets (so $ l y o SF On -site Parking (so irGL�p�o On -site Sidewalks (sf) S$ 3 G o Other on -site (sf) /M aft , 845&,5714,49 L r6b bue ff6. Off -site (sf) I Total (sf): 7 3 7 7 a Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. Form SWLI-101 Version 8.07 Page 2 of 4 **Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. 10. How was the off -site impervious area listed above derived? &JI 1" 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 attaclmu:nt. Form DRPC-1 High Density Commercial Subdivisions G u M K k� C' 0K �C ✓ Form DRPC-2 High Density Developments with Outparcels J Form DRPC-3 High Density Residential Subdivisions n 0 tO `t Form DRPC11 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 aBlhe 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 Porm SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-hrfiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cet Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401Sand Filter Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Pilter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement 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 at httu:/lh2o.enr.state.ne.us/su/msi maps.htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. initials • Original and one copy of the Stormwater Management Permit Application Form oet e • 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 of �6 • Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR 9— 4-0 • Calculations & detailed narrative description of stormwater treatment/management 4 LO • Copy of any applicable soil report 4e 6 • Three copies of plans and specifications (sealed, signed & dated), including: c m - 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 Stornwater 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): 7/i0.»*-r' G NUJ/✓EEiCrw/6 , / �9 Mailing Address: PL e ox- ex , r �. City: N E4' ,6C-2 ./ State:— C, Zip: 7- $.1-6 3 Phone: (zsZ I 63'7, 27L7 Fax; i ZSZ 1 656. 2-Y-p$ Email: �olf3yL3�[,.,✓GfYFY[?TNay+Bs G.✓EEI:i.✓(�PA.Co^- VIII.APPLICANT"S CERTIFICATION I, (print or hype name of person listed in General Information, item 2) C AA.- (Q S ljklJOG certify that the information included on this permit application form is, to the best of my k owl dge, 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 1(100. Signature: Date: / 7u Form SWU-101 Version g.07 Page 4 of 'ice SMED Permit (to be provided by DWQ) wr= NCDENR FEB L 6 LOJn ®W&WARD 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. �I. PROJECT INFORMATION Project name Burton Farm Village Pool Clubhouse Contact person Bobby Billingsley, PE Phone number 252,637,2727 Date 2.11.2008 Drainage area number 1 Olqiii�, II. DESIGN INFORMATION Site Characteristics Drainage area 178,344 It' Impervious area 73,770 fe %impervious 41.36388104 % Design rainfall depth 1.0 in Storage Volume: Non -SR Waters Minimum volume required 7,276 It, Volume provided 14,554 ft' Storage Volume: SR Waters 1-yr, 24-hr runoff depth in Pre -development 1-yr, 24-hr runoff ft3 Post -development 1-yr, 24-hr runoff ft3 Minimum volume required ft3 Volume provided ft3 Peak Flow Calculations Is prelpost control of the 1-yr 24-hr peak flow required? Y (Y or N) 1-yr, 24-hr rainfall depth 3.7 in Rational C, pre -development 0.2 (unitless) Rational C, post -development 0.5 (unitless) Rainfall intensity: 1-yr, 24-hr storm 7.5 in/hr Pre -development 1-yr, 24-hr peak flow 6.2 ft3/sec Post -development 1-yr, 24-hr peak flow 15.1 ft'/sec Pre/POSH-yr, 24-hr peak flow control 8.9 ft3/sec Basin Elevations Basin bottom elevation 19.50 ft Sediment cleanout elevation 21.00 it Bottom of shelf elevation 28.50 ft Permanent pool elevation 29.00 It Top of shelf elevation 29.50 It Temporary pool elevation 30.50 ft Volume and Surface Area Calculations SAIDA ratio 3.60 (unilless) Surface area at the bottom of shelf 5600.00 flz Volume at the bottom of shelf 26586.00 ft' Permanent pool, surface area required 6,420 ft2 Permanent pool, surface area provided 7,500 ft OK Permanent pool volume 29,861 ft3 Average depth for SAIDA tables 3.981466667 It OK Surface area at the top of shelf 9600 It, Volume at the lop of shelf 34136 ft3 Forrn SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 1 of 2 Permit No. (to be provided by DWQ) Forebay volume 5,971 ft' Forebay % of permanent pool volume 20 % OK Temporary pool, surface area provided 10,957 ft2 Drawdown Calculations Treatment volume drawdown time 3 days OK Treatment volume discharge rate 0.02 fills Pre -development 1-yr, 24-hr discharge 6.15 ft'(s OK Post -development 1-yr, 24-hr discharge 0.02 ft31s OK Additional Information Diameter of orifice 1.00 in Design TSS removal 90 % t t Basin side slopes 3 :1 OK Vegetated shelf slope to :1 OK M o� Vegetated shelf width 10 ft OK t� Length of fiowpath to width ratio 3 :1 OK Length to width ratio 3 :1 OK Trash rack for overflow & orifice? N (Y or N) Need to provide trash rack or similar device Freeboard provided 2 ft 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 Mach. Pumps Form SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 2 of 2 Permit (to be provided by DWQ) III; REQUIREDI_TEMS CHECKLIST _- ;', h _a. „�2 ,i.. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. tZ t_dj '3 a 8 1. Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, RECE P7 ED Off -site drainage (if applicable), 9 Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, FEB 14 2008 Pretreatment system, �) /� D (� High flow noncebypass ccessystem, �VVQ-V t{A 0 -Maintenance access, V a Recorded drainage easement and public right of way (ROVE, - Overflow device, and - Boundaries of drainage easement. 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, u l- 3. Section view of the dry detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. R L 3 ' P o 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. 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. L 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. L 6 7. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. I? LA 8. The supporting calculations. 9. A copy of the signed and notarized inspection and maintenance (AM) agreement. C°MM. cl. +cr N 10. A copy of the deed restriction. Form SW401-Wet Detention Basin-Rev.1 Part III. Required Items Checklist, Page 1 of 1 RECEIVED Pemtit Number: FEB 14 2008 (IobeprovidedbyDWQ) Drainage Area Numbor: Wet De�ten_ ipi>rBasin 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 ® 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 basil 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. — Tf 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 13 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: Potentialproblem: 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 -Lime fertilizRr application - Vegetation is too short or too Maintain vegetation at a height of long. I approximately six inches. Form SW401-Wet Detention Basin I&M-Rev.2 Permit Number: (to be provided by DWQ) Drainage Area Number: Form SW401-Wet Detention Basin I&M-Rev.2 Pernik Number: (to be provided by DWQ) Drainage Area Number. BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is dogged. 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 swate 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 Traying. 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 -tine 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 Aga] 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 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 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 8 sediment shall be removed. When the permanent pool depth reads 8 shall be removed. Sediment Removal Bottom feet in the main pond, the feet in the forebay, the sediment BASIN DIAGRAM ill in the blanks) 0 Permanent Pool Elevation 2 Z 1 Pe manen Pool Volume Sediment Removal Elevation 2 Volume -ft Min. ----------------------------- ----------- ------ Sediment Bottom Elevation 1-ft c Storage Sedimei Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin I&M-Rev.2 permit (to be provided by D R'Q) 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: ,do.eYvn/ FLizWW 11,&Z-46E f24,0c- CLc.6flo�./d RMP drainage area number: Printname: Clolwxeer J . fiAyES, Ta. Title: -,SV 447vy C- ei O Fy� GPM Ef Cb�•e/AvyLG C Address: �Zn �, Tl Y h 4-o%t L4A1,P C,~,OA-,y , l5ax- Z Z f 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, W& lu(' 65 , a Notary Public for the State of �)KA�\ CQft)�.'k C1. County of Cu,c( \tUC Y= do hereby certify that (10 (�S �tQlle S c iC_ personally appeared before me thus day of , ZM�- , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, LINDA BURRIS NOTARY PUBLIC K COUNTY STrCE OFITUNORTH CAROLINA SF.,AI., My commission expires 5-2 1-1 2. Form SW401-Wet Detention Basin I&M-Rev.2 IMIU03 P.001Mm„ x 11OFAa HTFlL:'. REURVED N/� FEB 2 6 2008 permit Number: (to be provided by DWp) ®11/14/i'tt_W R (0 Draviage Area Number: Filter Strip, Restored"�Ri�Jplaria/nnlBl fo afer and Level Spreader 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. Important maintenance procedures: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of inspection and maintenance will be kept in a known set location and will 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 the roblem: The entire filter strip 'Trash/debris is present. Remove the trash/debris. system The flow sputter device (if applicable) The flow splitter de ' nd dis se of any sediment off -site. The flow sputter device is Make any necessary repairs or damaged, replace if damage is too large for re air. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer 1&M-Rev.2 Page 1 of 3 .sr..�+.� .......�.r.�«.....�.......... BMP element: Potentialproblem: How I will remediate theproblem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one-time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo a of the level lip. The bypass channel Areas of bare soil and/or Regrade the soil if necessary to reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger or npap is ro g ypass c ri downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable)- approximately three to six inches. Areas of bare soil and/or Regrade the soil if necessary to 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. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. 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. Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet 1 401 Oversight Unit at 919-733-1786. Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 2 of 3 r t 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 name: Fjuoe To.o A;Ooeen W/ic-LfF6%s Poo[- GLo dWPLi rtC BMP drainage area number:, Print name: C//gtLEs T. 114Yafr, YTee Title: MAw46 e.✓6 At e. ?.dErf — gc/.Gron/ F/4,e W7 Oet dr4 ..,F- r C-,4r l4wl Address: KinY /yA&.t L ANo Co,,.Y /f,� Q"X zz S [-c. e Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and u resident of the subdivision has been named the president. 1> P&a BU, 6.5 , a Notary Public for the State of County of Cllu(( \tUCK , do hereby certify that J- a OQ�KS J'( personally appeared before me this 3-0 day of ka wst 2jX8 , and acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements Witness my hand and official seal, LINDA BURRIS E NOTARY PUBLIC jE CURRITUCK COUNTY STATE OF NORTH CAROUNA SEAL My commission expires 5" ZY 12- Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer l&M-Rev.2 Page 3 of 3 o:.rau�a Ya;�ro�r ' STORMWATER SUBMITTAL REQUIREMENTS WET DETENTION POND Objective A. Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be, by any means including piping or swales, and direct it to the pond. B. Check the proposed pond design to make sure it meets or exceeds the minimum design criteria for surface area, volume and drawdown. II. What makes up a complete wet detention pond application package? A. /wo sets of sealed, signed & dated layout & grading plans with appropriate details. /(Additional sets of plans may be requested for protects in certain counties) B. V Completed application with supplement(s), SWU-.101, SW401-Wet Pond, and inspection and aintenance agreements. C. N% Deed restriction document, if applicable (for subdivisions & projects with out parcels) D. V healed, signed & dated calculations. table elevation at all pond locations. �{ E. Estimated seasonal high water F. NlA Chlorides test results must be provided if the project is within Yz mile of SR waters (Phase 11). (This is only required to test out of SR water treatment requirements) III. BIMS entry (for DWQ use only) Enter & track application acknowledged date, review date, add info requested/received dates, permit issue dates, and drainage area info. Best done after the add info letter is written and before sending permit up for signature. IV. Shell documents (for DWQ use only) Permit shells: s:\wqs\stormwater\shells\highcompond s:\wqs\stormwater\shells\highsubpond s:\wqs\stormwater\shells\HDhybrid Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond VI. Review Procedure A. APPLICATION 1. ✓P n original signature is required. Photocopied signatures cannot be accepted. 2. ✓ A completed wet detention pond supplement and a signed, dated and notarized wet detention pond Inspection and Maintenance Agreement with an original signature. 3. —The numbers on the supplement match up to the numbers used in the calculations and shown on the plan details. 4. Built -upon areas are reported in square feet in Section 111.6. ij 5. V Receiving stream name and classification. This is important because in the non -Phase 11 counties, a wet pond cannot be used on a project that is within'/2 mile of and draining to SA waters. For Phase 11, a wet pond is allowed within '/2 mile of SA waters. 6. ✓Section 111.6 is filled in -cannot be left blank. One column must be filled in for each proposed wet pond. Q 7. If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State Corporations Database. Make sure corporation is spelled correctly (capitalization and punctuation matter). and that the person signing the application is at least a vice- president in the corporation, a General Partner in the partnership, a member in a member -managed LLC, or the manager of a manager -managed LLC. Need documentation to support if the Articles of Incorporation do not list the members or managers of the LLC. If an agent signs, then a letter of authorization is needed from the Ii/Apresident, vice president, general partner, member or manager. 8.1r, For subdivided projects, a signed and notarized deed restriction statement must be provided. Wet Detention Pond, cont. 1 B. CALCULATIONS 1. /he orifice is sized based on drawing down the calculated minimum volume in 2-5 days. The average head to use in the orifice equation is approximately one-third of the distance between the permanent pool elevation (PPE) and the elevation of the next available outlet above the permanent pool. The elevation of the next available outlet must be either the elevation where the minimum volume is provided, or it can be higher. The temporary pool elevation (TPE) to report on the supplement will be the elevation of the next available outlet above the PPE. The temporary pool volume (TPV) to report on the supplement is the volume between the specified PPE and the TPE. 2.WAr or Phase II projects that are within Y mile of and draining to SR waters, the difference in runoff from the predevelopment and post -development conditions for 3i /the 1 year 24 hour storm must be controlled and treated. PFor Phase II projects, the discharge rate leaving the pond can be no more than the pre -development discharge rate for the 1 year 24 hour storm. 4,WFFor Phase II projects draining to SA water, no discharge to surface waters may occur / from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to reaching surface waters. 5. The average pond depth is the permanent pool volume divided by the permanent pool surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be 6 deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep. �Ifthe 85 /o TSS chart is used a 30' vegetated filter must be provided at the outlet of the Pond. If the 90% TSS chart is used, no filter is required. 7. Use the cor7Uct-SAJDA TSS chart from the BMP Manual noting that there are different 8. 1�charts for different areas of the State. Required surface area at permanent pool. 1 /Provided surface area at permanent pool (Based on pond dimensions) 0. V Required volume calculation based on 1.5" storm for Phase 11 projects* and 1" storm for all others projects. *unless the project is Phase II and within % mile of and draining to SR waters then the volume calculation must be based on difference between the pre and post development conditions for the 1-yr 24-hr storm. ? 11. Table of elevations, areas, incremental volumes and accumulated volumes for overall pond and for forebay, to verify volumes provided. 12'VForebay designed to hold 20% of the permanent pool volume. (Range of 18%-22% OK.) 13-erosive flow, for 10 yr. storm in the vegetated filter, if using 85% TSS. 14.y Toe seasonal high water table must be at or below the proposed permanent pool elevation to assure that the necessary volume will be available above the permanent pool. 15 Rounding numbers off during the calculation process can result ip deficiencies. Do not round the numbers until you get to the final result. 16. VAn additional one foot must be excavated below the bottom elevation of the pond. The 1 foot sediment accumulation depth is not included in the average depth calculation. Wet Detention Pond, cont. C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets, layout; grading and details. For larger projects, show as much information as possible on as few sheets as possible, without cluttering them up. 1. � Development/Project Name 2. Engineer name and firm. 3.✓ Legend 4. ,North Arrow 5. Location Map with nearest intersection of two major roads shown. Major road is any 1, /2, or 3 digit NC, US or interstate highway. 6. J Scale- standard engineering scale, no off-the-wall stuff. 7. VIDate 8. ✓Revision number and date, if applicable. 9. Original contours, proposed contours, spot elevations, finished floor elevations, pipe inverts, swale inverts, etc. 10.VExisting drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map delineating the offsite drainage areas. 11V/Property/Project boundary lines, bearing & distances. 13�Q Mean High Water Line or Normal High Water Line, if applicable. 1he lowest elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to prevent dewatering the wetland. ,� 14. Drainage easement widths, pipe sizes and swale inverts are provided. 15. Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands delineation map signed by the Corps of Engineers, or have the applicant include a copy of the unsigned delineation map submitted to the Corps. Wet ponds may not be located in wetlands unless a permit to fill those wetlands has been obtained. 16�Details for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions & slopes. 1-A Apartment / Condo development- Provide a typical building footprint with dimensions 18✓and note all concrete and wood deck areas. The drainage area for each wet pond is clearly delineated and numbered to match up to the calculations and supplement. Drainage area delineation is best done as a separate /plan sheet. 19. A pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes above the permanent pool, and the weir elevation between the main pond and the /forebay. 20. V The 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation. 21:vAn outlet structure detail showing a trash rack with 56" square openings, the necessary orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool ✓elevation. 22. Dimensions for each line and arc formed by the permanent pool contour. 23n%�/!Where the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be shown on the plans & detailed (elevations, inverts, slopes, and flow spreader mechanism). Please note that the filter strip is not a ditch. 24.✓A,forebay is provided for each inlet and located so as to prevent short-circuiting. 25.Vthe pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path length. Artificial "baffles" of timber, vinyl, or earth can be used to create a longer flow path. The top elevation of the baffle should be set at the temporary pool elevation or 26. A Vegetation plan is specified for the pond, including slopes. Wetlands species are listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent /vegetated cover for pond slopes. 27. All roof drainage must be directed to the pond. Show the roof drain collection lines on the plan. This is necessary for projects where the buildings back up the property lines where roof drainage may leave the site prior to going through the pond. THOMAS ENGINEERING, PA To: NCDENR Division of Water Quality 943 Washington Square mall Washington, NC 27889 Re: Burton Farm Village Pool Clubhouse State Stormwater Permit No. SW7080214 Pamlico County, NC Dear Sirs, September 22, 2009 RECEIVED SEP 2 4 2009 DWQ-WARD Please find eyelosed for your files the Engineer's Certification for the referenced project. If you hoe any questions or comments, please do not hesitate to call. Enclosures I-01 309 MetcalfStreet.P.0. Box /309.New Bern, NC 28563 Phone: (252)637-2727.Fa : (252)636-2448.Website: Thomas EngineeringPA.com Burton Farm Village Pool Clubhouse Stonnwater Permit No. SW7080214 Pamlico County Designer's Certification State Stormwater Management Systems Permit No. SW7080214 SEP 2 4 2009 DViir)-WARM I, G,n��D • waif S , as a duly registered ,Vess` 'u¢Q� in the State of North Carolina, having been authorized to obsery (periodically/' ekly/ full time) the construction of the project, (Project) for s r`�w� �.� ;�, b0�nti �.,u-c4project Owner) he state that, to the best of my abilities, due care drid diligen6e 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. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specification: SEAL Page 6 of 7 State Stormwater Management Systems Permit No. SW7080214 Certification Requirements: �. 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. 44 All roof drains are located such that the runoff is directed into the system. r/ 5. The outlet/bypass structure elevations are per the approved plan. fib• The outlet structure is located per the approved plans. 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. 122.. Required drawdown devices are correctly sized per the approved plans. ----113. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. cc: NCDENR-DWQ Washington Regional Office Pamlico County Building Inspections Page 7 of 7