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HomeMy WebLinkAboutSW7980513_CURRENT PERMIT_19981030STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE JQlQ3� YYYYM M DD W RP) State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Wayne McDevitt, Secretary A. Preston Howard, Jr., P.E., Director DIVISION OF WATER Qt1pr.TTy October 30, 1998 A,LTT4 s�� NC®ENR NORTH CAROUmA DEP TMEM OF ENVIRONMENT mo NRRIRLL RESOURCES Currituck Commercial Center Attn: Mr. Russell E. Twiford 2101 River Shore Drive Elizabeth City, NC 27909 Subject: Stormwater Permit No. SW7980513 Currituck Commercial Center High Density Stormwater Project Currituck County Dear Mr. Twiford: The Washington Regional Office received the completed Stormwater Application for the subject project on October 28, 1998. 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. SW7980513 dated October 30, 1998 to Mr. Russell E. Twiford. This permit shall be effective from the date of issuance until October 30, 2008 and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. 943 Washington Square Mall, Washington, North Carolina 27889 Telephone 252-946-6481 FAX 252-975-3716 An Equal Opportunity Affirmative Action Employer Currltuck Commercial Center Mr. Russell E. '_Tcdi ford October 30, 199A Page Two If you have any questions, or need additional information concerning this matter, please contact Bill Moore at (252) 946- 5481, extension 254. Sincerely, -T it M ulli g Water Quality Regional Supervisor Washington Regional Office cc: Bissell Professional Group Cu i tuck_ County Inspections ashington Regional office Central Files State Stormwater Management Systems Permit No. SW7980513 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STOR►4WATER 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 Mr. Russell E. Twiford Currituck County FOR THE construction, operation and maintenance of stormwater management systems 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 a wet detention pond to serve Currituck Commercial Center located at Moyock, NC. This permit shall be effective from the date of issuance until October 30, 2008 and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 4 of this permit, the Project Data Sheet. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 11 DIVISION OF WATER QUALITY PROJECT DATA Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Water Body Receiving Stormwater Runoff: Classification of Water Body: Total Site Area: Total Imper, Surfaces Allowed Pond/Basin Depth: Required Surface Area: Provided Surface Area: Required Storage volume: Provided Storage Volume: Controlling Orifice: Currituck Commercial Center SW7980513 Currituck County Mr. Russell E. Twiford 2101 River Shore Drive Elizabeth City, NC 27909 5/06/98; original 10/28/98; complete Northwest River SC 25.96 acres 15.40 acres 4.0 feet 45,233 square feet 45,728 square feet 67,554 cubic feet 78,433 cubic feet 3.0 inch orifice 4 4. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as swales) shown on the approved plans as part of the stormwater management system without submitting a revision to the permit and receiving approval from the Division. 5. The following items will require a modification to the permit: a. Any revision to the approved plans, regardless of size b. Project name change C. Transfer of ownership d. Redesign or addition to the approved amount of built -upon area e. Further subdivision of the project area. In addition, the Director may determine that other revisions to the project should require a modification to the permit. 6. 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. II. SCHEDULE OF COMPLIANCE 1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management system. a. 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 surfaces except roads. b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 2. The facilities must be properly maintained and operated at all times. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency including, but not limited to: 5 a. Semiannual scheduled inspections (every 6 months) b. Sediment removal C. Mowing and revegetation of side slopes d. Immediate repair of eroded areas e. Maintenance of side slopes in accordance with approved plans and specifications f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping. 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. 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 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. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality. 7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of five years from the date of the completion of construction. III. GENERAL CONDITIONS 1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by an application fee, 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. 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 143-215.6(a) to 143-215.6(c). 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) which have jurisdiction. 6 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 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. Permit issued this the 30 th day of October, 1998. NORTH CAROLINA ENVIRONMENTAL COMMISSION " Preston Howard, Jr., P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7980513 7 Currituck Commercial Center Mr. Russell E. Twiford Currituck County Stormwater Permit No. SW7980513 Designer's Certification I, , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, for (Project) (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. Signature Registration Number Date 0 Permit No: State of North Carolina In1 � @ � Q � � N Department of Environment and Natural Resou d5 Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATI onRrOCT 2 1 1998 WET DETENTION BASIN SUPPLEME T WASHINGTON REGIONAL OFFICE This form may be photocopied for use as an original DWO DWQ Storn�water Management Plan Review: A comp etc storm water management p an submittal includes a wet detention basin supplement for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a signed and notarized operation and maintenance agreement. 1. PROJECT INFORMATION (please complete the following information): Project Name: Currituck Commercial Center Contact Person: David Ryan Phone Number. (252 ) 261-3266 For projects with multiple basins, specify which basin this worksheet applies to: +0 df0 Basin Bottom Elevation 2.5 ft. (average elevation of the floor of the basin) Permanent Pool Elevation 6.5 ft. Temporary Pool Elevation 7.81 ft Permanent Pool Surface Area 46,728 sq. ft Drainage Area Impervious Area Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DAI used Diameter of Orifice `Design TSS Removal 25.96 ac. 16.40 ac. Cu. ft. 78,433 cu. ft. 15, 236 Cu. ft. 4.0 3 in. (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off -site drainage to the basin) (combined volume of main basin and forebay) (volume detained above the permanent pool) (surface area to drainage area ratio) 85 % (85% TSS removal required, see item k below) If: REQUIRED ITEMS CIIECKLIS'I' The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Deparlinent of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 21-1 .1008. Initial in the space provided to indicate the following design requirements have been met and supporting d0CnnlCntlltloll is at(;ichcd. If the applicant has designated an agent in the Stormwater Management Pcrmit Application Dorm, the agent may initial below. If a requirement has not been met, attach justification. Pone SN�IJ-1112 Aev I/August 1998 Pul;c I ul 3 /- Orare ur iNurui l.arulrna WASH NGTONMFI'ICE Department of Environment and Natural Resources Aid tr� t Division of Water Quality r��, to�'rg 'OCT 0 i 1498 L STORMWATER MANAGEMENT PERMIT APPLICATION FORMg E M, ;Sl plp This form may be photocopied for use as an original n 1 GENERAL INFORMATION Applicants name (specify, the name of the corporation, individual, etc. who owns the project): Russell E. Twiford 2. Print Owner/Signing Official's name and title (the person who is legally responsible for the facility and its compliance): ford 3. Mailing Address for person listed in item 2 above: 2101 River Shore Dr. Elizabeth Cit Telephone Number: ft State: N.C. Zip: 27909 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Currituck Commercial Center 5. Location of Facility (street address): ock Township City Moyock Township County: 6. Directions to facility (from nearest major intersection): Approx. 1/4 mile south of intersection of S. R. 1216 w/ N.C. 168 7. latitude: *5' Longitude 76' 20' of facility 8. Contact person who can answer questions about the facility: Nvrt David Ryan __ Telephone Number: ( 2 F)a 2 61 9 6 6— IL PERMiTINFORMATION: 1. Specify whether project is (check ono): ✓___New Renewal Modification 2. If this application is being submitted as the w:;ult of a renewal or modification to an existing permit, list the (xisting pennil fit _ _ and its issue date (if known) 1:on❑ SWll-101 April 1999 Pq'.c I of 4 3. Specify the type of project (check one): _Low Density _High Density _Redevelop _General Permit _Other 4. Additional Project Requirements (check applicable blanks): _CAMA Major xSedimenlation/Erosion Control 404 Permit III. PROJEO-INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater ntianagement for the project . —Stox-mwaLer will sheet flow from proposed impervious --De-veinpment_ta—vve_gatative filter and conveyed to a wet detention pond 2. Stonnwater runoff from this project drains to the �P ----..P�.hwPst River basin. 3. TOW Project Area:- 25 96 acres 4. Project l3uilt Upon Area: 63. 16 /, S. 1-10", many drainage basins does the project have?___4_ G. Complete the follo,ing information for each drainage basin. If there are more than two drainage basins in the proj(.'ct, attach an additional sheet with the information for each basin provided in the same format as below. I3'isiit.]nforniaCion t�, ,,, Receiving Stream Name ,: Draiva c Basiny g, , e` -':Draina;e"73asm 7„ Receiving Stream Class Nnrthwest Drainage Basin Area Existing Impervious" Area 72 020 ft Pro )osed hn ervious Area a % 111,)ervious" Area (total) f t 0 113,964 f t 41 r.. :Drainage&Basin On site Bliddings On -site Streets 1 5, 180 f t x 16 40ft 1 On -site Parking' On-site Sidewalk drive _ 1531ft 2- Other on -site x Off -site mpervi s 96 293 ft I otal: I Z= 210,308 fta ' Ln ...„. ...... a.,rr. .., „__ - -,_aae.. ..arms, ..� sidetunlfs, gretc. ,.)..... "'o, ,,,r,,,�, uE' uiu nar nnnlcrt to, binldings, roads, parl;io,C uri•rts', 7. How Xmas Iho ol(-site iu)Ixrviousama lish�i el,ove derived? IV. I)H])HPSlFit 1(.-IIONSANI)PH( -I11(.'11V1 COVENANTS n:;lrirliuns and prolrv-tive covon;uil',.ow required to be recorded for all Iow density plop�Is and ;ill :adhd o,.Jnm; fowl to the sale of uny lot. I'I-v.,• n;,r Attachn)eot A for the specifi,item;, That mull b(1, n.,:nrded_ I ooll !; l; o)l A1,61 199R Page 2 of 'I 3. Specify the type of project (check one): _Low Density _High Density _Redevelop _General Permit _Other 4. Additional Project Requirements (check applicable blanks): _CAMA Major _Sedimentation/Erosion Control 404 Permit III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. 2. Stonnwaler runoff from this project drains to the 3. Total Project Area acres 4. Project Built Upon 5. How many drainage basins does the project have? River basin. 6. Complete the following information for each drainage basin. If there are more than two drainage basins in the project, attach an additional sheet with the information for each basin provided in the same format as below. Basin liiforrnation hei, _1Z .. yI .Draina} e Basin3'', Receivin, Stream Name Receivin Stream Class gr w s Drainage Basin Area 67, 198 ft Existing Impervious* Area _ Proposed Im ervious'Area 318,976 f t a 4ft %Imervious*Area (total) 75,95°� 72 42% 42. 72 Im eryious f, unace Are r Di' e Basra =Drainage Basin 4, On -site Buildin s _ _ - On -site Streets _ 6456 f t On -site Parking _ _ On -site Sidewalks Other on -site 318,976 f t a42, 206 f t a Off -site Total: �= 75.95% 48,66 ft ••••r""' '> uVolcu u� Me ouur upon area 111014arng, but not lunited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. 7. How was the off -site impervious area listed above denved? IV. DFl:D RES'I'MCHONS AND PROTECTIVI: COVENANTS Dced restrictions and protective covenants are required to be recorded for all low density projects and all subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that mull be recorded. Form SWU-101 April 1998 Page 2 of 4 By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the items required by the permit, 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. AGENT AUTHORIZATION If you wish to designate submittal authority to another individual or firm so that they may provide information on your behalf, please complete this section: Designated agent (individual or Phone:( 1 Fax VI. SUBMITTAL REQUIREMENTS This application package will not be accepted by the Division of Water Quality unless all of the applicable items are included with the submittal. Please indicate that you have provided the following required information by signing your initials in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable Supplement Form(s) for each BMP (see Attachment A) • Permit application processing fee (see Attachment A) • Two copies of plans and specifications including: • Detailed narrative description of stormwater treatment/management • Two copies of plans and specifications, including: - Development/Project name - Engineer and firm -Legend - North arrow - Scale Applicant's Initials - Revision number & date - Mean high water line - Dunensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, parking, cul-de-sacs, sidewalks, and curb and gutter - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage basins delineated - Vegetated buffers (where required) VII. APPLICANTS CERTIFICATION 1, (print or type name of person listed in General Grforrnnl ion, item 2) certify that the information included on this permit application form is correct, that lire project will be constructed in conformance with the approved plans, that the deed restrictions in accordance with Attachment A of this form will be recorded with all required permit conditions, and that to the best of my knowledge the proposed project complies with the requirements of I5A NCAC 21-1 .JWO. Ponn SWII-I()] April 1998 Pagr.3 of 4 Permit No. 0o he provi e y DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DW Stormwater Management Plan Review A complete stonnwater management p an submittal includes a wet detention basin supplement for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a signed and notarized operation and maintenance agreement. L PROJECT INFORMATION (please complete the following information) Project Name: C,rriturk Cortimercial Center Contact Person: David Ryan Phone Number: (252) 261-3266 For projects with multiple basins, specify which basin this workshcet applies to: Basin Bottom Elevation _2 5 _ ft. Permanent Pool Elevation 6 5 , ft. Temporary Pool Elevation It. Permanent Pool Surface Area���_ sq. ft. Drainage Area Impervious Area Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DA1 used Diameter of Orifice Design TSS Removal 16.40 ac. -+50-' 3— cu. ft. --747-433 Cu. —15,236 cu.ft. II. REQUIRED ITEMS CIiECKLIS'I' (average elevation of the floor of the basin) (elevation of the orifice) (elevation of the discharge structure overflow) (water surface area at the orifice elevation) (on -site and off -site drainage to the basin) (on -site and off -site drainage to the basin) (combined volume of main basin and forebay) (volume detained above the permanent pool) (surface area to drainage area ratio) (85% "FSS removal required, see item k below) The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. DeparUncnt of, I'nvironmcnt, I lealth and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2I-1 .1008. Initial in the space provided to indicate the following design requirements have been mct and supporting docuunentation is atlzched. If the applicant has designated an agent in the Stormwater Management Permit Application Dorm, the agent may initial below. If a requirement has no( been met, attach jus(ific:afion. Porn tiN�U-I(IZ Rev I/August 1798 Pnge I of 3 Applicants Initials a. The temporary pool controls runoff from the 1 inch storm event. b. "rhe basin length to width ratio is greater than 3:1. c. The basin side slopes above the permanent pool are no steeper than 3:1. d. A submerged and vegetated perimeter shelf at less than 6:1 is provided (show detail). e. Vegetation above the permanent pool elevation is specified. f. An emergency drain is provided to empty the basin. g.. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). h. The temporary pool draws down in 2 to 5 days. i. A trash rack is provided for both the overflow and orifice. j. The forebay volume is approximately equal to 20% of the total basin volume. k. Sediment storage is provided in the permanent pool. 1. A 30-foot vegetative filter is provided at the outlet2 (include erosive flow calculations) in. Recorded drainage casement for each basin including access to nearest right-of-way. n. A site specific operation and maintenance (O&M) plan is provided. o. A vegetation management/mowing schedule is provided in the O&M plan. p. Semi-annual inspections are specified in the O&M plan. q. A debris check to be performed after every storm event is specified in the 0&M plan. r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth). s. A legally responsible party is designated in the O&M plan3 (include name and title). t. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified to be performed prior to use as a wet detention basin. 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 non- standard table entries. 2 The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal. 3 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. Ill. AVET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT The wet detention basin system is defined as the wet detention basin, forebay, non-integrated prclrcatntcnt systems (pretreatment other than forebays), and the vegetated filter if one is provided. This system (check one) 6Qdoes CI does not incorporate a vegetated filter. This system (check one) Kdoes IJ does not incorporate non-integrated pr ti-caturent. t 9;iintenance activities shall he performs ns follows: After every significant runoff producing minfitll event and at least monthly: 1'01111 SWU-102 Rev l/August 1999 Paget of 3 a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, grass 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. 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. 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. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The original design depth IS 4 1 0 , 'file sediment removal benchmark depth is: 3 , Remove cattails and other indigenous wetland plants when they cover 75% of the basin surface. These plants shall be encouraged to grow along the basin perimeter. 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. All components of the wet detention basin system shall be maintained in good working order. I acknowledge and agree by my signature below that I am responsible for the performance of the above maintenance procedures. I agree to notify DWQ of any problems with the system or changes in the name of the project, responsible party, or address. Print name: Address: Phone:_ Title: Signature: Date: 1, _ a Notary Public for the State of County of______ do hereby certify that personally appeared before me this day of 19 , and acknowledge the due cxccution of the forgoing infiltration system maintenance requirements. Witness my hand and official seal, SEAL My commission expires Fran SWI1--102 Rev 1/August 1998 Page 3 of Per No. 0e prm'i� cr 1 !7 jt{%�, i Slate of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATLR MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use a,r an original IDWQ Stormwatcr Matta entent Plan Review: A comp etc stormwater management p an su nnittal includes a wet detention basin supPlement for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a signed and notarized operation and maintenance agreement. I. PRO.II3CT INFORMATION U)Icasc complete the following information): ProjectNante: Currituck Commerciai Center Contact Person: David Ryan Phone Number: (252 ) 261-3266 For projt:cis with nniltiple basins, specify which basin Ihis woiksheet applies to: Basin Bottom I Ievation 2. 5 _ it. (average elevation of the f]oor of the basin) Permanent Pool I--levatio❑ 6. 5 ft- (elevation of the orifice) 'I�cntpomi-v Pool Llevation 7. 81 (t. (elevation of the discharge structure overnow) Permanent Pool Surface Arca qC 728 ,q. ft Drainage Arca Impervious Arc❑ Permanent Pool Volume Temporary Pool Volume Forebay Volume SA/DA t used 25.96 ac_ 16.,10 ac. 0 oS3 ell 78,433 cu. fL 15, 236 cu- ft. 4.0 Diametcrof0rlfice 3 in. Design fSS Ranoroal 85 I/, II. IU:Q1I fRI?D ITEMS CIIb;C1<1,fS1, (water surface area at the orifice elevation) (on -site and off -rile drainagc to the basin) (on -site and off -site drainagc to the basin) (combined volume of main basin and forebay) (volume detained above the permanent pool) (surface area to drainagc area ratio) (85°/I "'SS rc'"O"i re(iuired, sec item k below) t he Gillnvvinl, ':lucklisl outlines (ICNIp,n rcquirenicnlr; per the St��nnw:u,.l lied Iv1;inagcnlent I'raclices ucnucil (ICI.( I)�:Isninn:nl of 1?nvironincnt, Ilcallh ;uld N;itural Pcsourcc;, Nm"'IIII)c I�)'l;) and Administrative ill1rd cIIInl I i+ Idr A(' :>If .100h_ Inili:il in Iln ,pare pnrvidcd in tlir d`n rbc(1 If Ihr applicant l`,ppliraunn �niu, Ilir:y,rnl ivav initial In•Inw I ,nm ';V"If In.' P-v /Aujir.t I`r'14 nlluwiug dk:;iw,n w(pillrnirnl ba; dr:;it!,nalcd an at;rnl in Ili 1(:4 rcquircuicnt leas nut lir{•l Ilavc. bccn IIICI and :;upImlIIIlp, , ,lye .i Hill J LIf 29 19se WASHINGTON REGIONAL OFFICE DWO 10/02/1998 18:59 252-331-1468 RUSSELL E TWIFORD PAGE 03 Prplir✓eta Initials e. lire temporary pool controls tur off from the 1 inch storm event. b, The basin length to width ratio is greater than 3:1. c. The basin side slopes above the permanent Pool are no steeper than 3:1. d. A submerged and vegetated perimeter shelf at less that 6: l is provided (show detail). e. Vegetation above the permanent pool elevation is specified. f. An emergency drain Is provided to empty the basin. g. • The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). ' h. The temporary pool draws down in 2 to S days. ' i. A trash rack is provided for both the overflow and orifice, Lj. The forebay volume is approximately equal to 20e/s of the total basin vohstne, i k. Sediment storage is provided in the permanent pool. i. A 30-foot vegetative filter is provided at the outlet2 (ittclude erosive now oalctrlations) in. Recorded drainage easement for each basin including access to nearest right-of-way. a. A site specific operation and maintenance (O&lvl) plan is provided. o. A vegetation management/mowing schedule is provided fr. the O&M plan; p. Semi-annual inspections are specified In the 0&M plan. q. A debris check to be performed after every storm event is spocifted fr, the O&M plan. r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth), s. A legally responsible party is designated in the O&M plan3 (include name: and title;, t. If the basin is used for Mdirn8ot and erosion control during construction, clean out of the basin is specified to be performed prior to use as a wet detention basin. wVWVI t When Ong the DiVision WDA tables, the correct SA/nA ratio for parmenent pool sizing should be computed based upoc the 'Ma: Otpervicus % and permanent pool depth. Llnear Lmermistion should be emp1eye3 to datermirle the correct value for eon- standalf We stares. 2 The rat rtment for a vegetative filter may be waived if the wet detention buin Is designed to meet 90% TSS remove!. 3 The lags ly respen�ible Party should not be a homootvnen amwistion unless more then 50% of the lots have been sold and a resident�of the inbd!Vlflen has been named the president. III. VYEjf DEUNTiON BASIN OPERATION AND MAINTENANCE AGREEMENT The wet; etention basin system is defined w the wet detention basin, forebay, non-integrated prctreatmcnc systems preteatment other than forebays), and the vegetated filter if one is provided. This syt em (check sae) 2(does D does not incorporate a•vegetated filter. This sy 'ern (check one) Kdoes D does not incorporate non-integrated pretreatment. Maintcrtance activities shall be performs as follows: I 1. After every sjgnificatrt runoff producing rainfall event and at least monthly: Form S -102 RPv I/August 1998 Page 2 of 3 I 4. 5. 11 a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation, grass cover, a d Qeneral condition. b. Check aid clear the orifice of any obstructions such that drawdown of the temporary pool occurs within P to 5 days. areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative sin a maximum height of six inches, and remove trash as needed. lair the collection system (i.e. catch basins, piping, swaies, riprap, etc.) quarterly to maintain ,inn nulated sediment from the wet detention basin system semi-annually or when depth is of the original design depth. Removed sediment shall be disposed of in as appropriate fall not be handled in a manner+hat will adversely impact water quality (i.& stockpiling new a basin or stream, etc.). !r 3-n, s and other Indigenous wetland plants when they cover 75% of the basin surface, These encouraged to grow along the basin perimeter. st be drained for an emergency or to perform maintenance, the flushing of sediment through drain shall be minimized to the maximum extent practical. of the wet detention basin system shall be maintained in good working order I acknowledge and agree by my signature below that I am responsible for the performance of the above maintertPee procedures. force to notify DWQ of any problems with the system or changes in the name of the project,IkesponsiSle party, or address. Print s: W / �O lid s �?i/ S: C II Addresjl t V6R S 0 roe 7 0 Phone: a S L' 3 O 1 Title: 016 Signet . __ Date a Notary Public for the State of County ipf I_ do hereby certify that due appeared before me this day of ion of the forgoing infiltration system maintenance requirements. I My corn nission �I Form SW(-102 I AF'r I/Aupua 199E Pape 3 of 3 SEAL 19_--_=, and acknowledge the Witness my hand *nd official seal, BISSELL PROFESSIONAL GROUP 4417 North Croatan Highway - P.O. Box 1069 Kitty Hawk, NC 27949 Phone: 252-261-3266 ** Fax: 252-261-1760 TRANSMITTAL LETTER TO: Mr. William Moore NCDENR/Water Quality Section 943 Washington Square Mall Washington, NC 27889 PROJECT: Currituck Commercial Center WE TRANSMIT: (x) herewith FOR YOUR: (x) approval ( ) review & comments ( ) use ( ) other ocT a e use � Wp$NINGION REGIONAL OFFICE DATE: October 26, 1998 Project No.: 3427 Copies Date Description 2 Revised 10-26-98 Drainage Plan 1 10-2-98 Stormwater Management Permit Application Form REMARKS: Russell Twiford will be forwarding the check for $160.00 to cover the additional application fee. If you have any questions or need additional information, please feel free to call. Copies To: Sincerely, Bissell Professional Group David Ryan, S a ngineer 10/26/1998 18:45 252-331-1468 RUSSELL E TWIFORD PAGE 01 10/26/1998 18:45 252-331-1469 RUSSELL E TWIFORD PAGE 02 yp'Ax a s'.? 9 7Ss 3 7i,G �.ora. ass » �ssoiaMr As, aa'a -• a0/ i *cC 1APAP..-W oALk" jr..MWWI /NO.-7 ema eo Ae- 10/26/1998 18:45 252-331-1468 RUSSELL E. TWIFORD ATTORNEY AT LAW 203 N, ROAD ST. 335-7447 ELIZABETH CITY, NC 27000 RUSSELL E TWIFORD October 26 rn r TO THE nnOFR Or N.C.D.E.N.R. THE Sum16 0=50 0as PAGE 03 22477 1998 046401, i $ 160.00 nouAR5 rwn H fw. M H..w N.wk N- MN.11k NNroH1. fJIZlDeM city. N.C. Tnit Permit for Currituck Cocmierical CenterMoym RUSSELL E. TWIFORD ` ATTORNEYATLAW 22362 203 N. ROAD ST, 335.7447 ELIZABETH CITY, NC 27909 -April . 23 _19.g8 MY TO THE + ORDER OF N.C.D.E,N.R. ':, :4' J 90.00 HE J UM 9 ® BOLS 0LO CTSI., . .. DOiIARS CtJ /�. NnI NNMI, ad,"" 9"No ft CNY, N.C. Project No. 3427 Application Fee FOR Currituck Commerical Center N° RUSSELL E. TWIFORD ATIORNEYArLAW 22363 P,. 203 N. ROAD 3T, 339.7447 .. ' ,' �,., - .'+ ELIZABETH CITY, NC 27009 M April 2'� 1.998 PAY Ir) N C.D.E N.R. I1 ►� nrrnrR nF $ 225,00 THE, a uM 2 2 5 juou M O4e ' ootlaRc lfil ni ��(�rJp, F"f VMFM� 480ooM Nook �11, FN Eic. n Cn H.c. v Project No.3427 Application Fee ' FoR Currituck Commerical; Center NNO 2