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HomeMy WebLinkAboutSW7040604_CURRENT PERMIT_20000519STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE � CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE DOC DATE YYYYMMDD of W A TF9 p C Mr. Steve Farr Farr Developing, LLC 6032 Currituck Road Kitty Hawk,.NC 27949 Dear Mr. Farr: Michas! F. Easley, Govemor William G. Ross Jr., Secretary North Carolina Department of Environment end Natural Resources Alan W. Kiimck. P.E. Director Di0sion of Water Qualit-, May 19, 2005 Subject: Permit No. SW70406D4 Modification Currituck Industrial Park High Density Stormwater Project Currituck County The Washington Regional Office received a completed Stormwater Application for modification to permit SW7040604 on April 20, 2005. 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. SW7040604 dated May 19, 2005 to Farr Developing, LLC for the construction and operation of four wet detention ponds and grass lined swales to serve Currituck Industrial Park located at the East end of Dr. Newbern Road in Currituck County, NC. This permit replaces permit SW7D4D5D4 issued August 5, 2004. Enclosed is a copy of the approved modified portion of the plans. This permit shall be effective from the date of issuance until May 19, 2015 and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714, Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact me at (252) 948-3923. Sincerely, Roger K. Thorpe Environmental Engineer Washington Regional Office cc: Quible & Associates (;jjrrituck County Inspections ;/Washington Regional Office Central Files NorthCan ,1latrtra North Carolina Division of Water Quality Washington Regional Office Phone (252) 946-6481 FAX (252) 946 9215 Customer Service intemet h2o.enr.state.nc.us 943 Washington Square Mall, Washington, NC 27889 1.677-62-:-6748 4 State Stormwater Management Systems Permit No. SW7040604 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT High Density 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 Currituck Industrial Park, LLC Currituck County FOR THE construction, operation and maintenance of stormwater management systems in compliance with the provisions of 15A NCAC 21-1.1000 (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 four wet detention ponds and grass swales to serve Currituck Industrial Park located at the East end of Dr. Newbem Road in Curr tuck County, NC. This permit replaces permit SV 7040604 issued August 5,2004.. This permit shall be effective from the date of issuance until May 19, 2015 and shall be subject to the following specified conditions and limitations: t. DESIGN STANDARDS 1. This permit is effective only with resaect 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 2 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. Project Name: Permit Number: Location: Applicant: Mailing Address: Application Date: Receiving Stream: Classification of Water Body: DIVISION OF WATER QUALITY PROJECT DATA Currituck County Industrial Park SW7040604 Currituck County Farr Developing, LLC 6032 Currituck Road Kitty Hawk, NC 27949 April 20, 2005 UT to Currituck Sound SC Pond # Area #1 Area #2 Area # 3 Area #4 Drainage Area: 16.3 ac 12.1 ac 29.1 ac 12.1 ac Total Impervious: 10.7 ac 8.1 ac 18.8 ac 7.9 ac Wet Pond Depth: 3.0 ft &0 ft 6.0 ft 3.0 ft Required Storage Volume: 43,075 cf 32,356 cf 78,751 cf 31,815 cf Provided Storage Volume: 120,358 cf 41,103 cf 179,491 cf 189,576 cf Required Surface Area: 54,246 sf 19,844 sf 46,140 sf 40,269 sf Provided Surface Area: 75,633 sf 20,333 sf 111,815 sf 54,430 sf Controlling Orifice: 5 @ 2.0 in 3 @ 2.0 in 10 @ 2.0 in 5 @ 2.0 in Orifice elevation: 6.0 ft 6.0 ft 6.0 ft 6.0 ft 4. No homeownerflot 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 permMee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. 11. 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 Operavon 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: 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 worts 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. 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 invoived, 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. 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 system S. 5. Tfie.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 19 th day of May, 2005. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION j—Alan . Klimek, P.E. Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7040604 Currituck County Industrial Park Stormwater Permit No. SVV7040604 Designer's Certification 1, as a duly I registered Professional Engineer in the State of North Carolina, having been authorized to observe (pedodicallytweeklyffull time) the construction of the project, (Project) j 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. Signature jRegistration Number ;t Date — - - - -- Quible Quible & Associates, P.C. RECEIVEDPO. Drawer 87C Kitty Hawk, NC 27949 ENGINEERING • ENVIRONMENTAL SCIENCES • PLANNING • SURVEYING Phone, 252461-3300 SINCE 1959 SEP2 6 2005 Fax, 252-261-1260 PRINCIPALS Sean C. Boyle, P.E. Josephs. Lassiter, C.E.P. Eduardo J. Valdivieso, P.E. September 22, 2005 D O Q Q-Wf-iRY ASSOCIATES JosephJ. Anlout. P.E. Kathenne C. MarCheNa. P.L.S. Mr. Roger K. Thorpe Norm Caro ina epartment of Environment and Natural Resources Division of Water Quality 943 Washington Square Mall Wqashington, NC 27889 Re: Currituck Industrial Park Stormwatcr Permit No. SW7040604 Dear Mr. Thorpe: The purpose of this letter is to certify that, based on periodic inspections throughout the construction process, the stormwater management appurtenances associated with the above referenced project have been constructed in substantial conformance with the approved plans. Plantings associated with the wet pond construction have been installed. Due to the drought conditions that we are currently experiencing as well as pumping of groundwater from sand pits on two adjacent sites flanking the subdivision, the water level within the ponds is currently low. This low water level has adversely impacted the health of the planted vegetation. The required plants will be monitored as the basins re -fill and normalize, and additional plantings will be made as needed as prescribed by the basin maintenance requirements. If you have any questions, or require any additional infonnation, please do not hesitate to contact me at (252) 261-3300. Thank you for your assistance with this project. Sincerely, D ble & oci. es P.0 id A. D el, I . encl: as stated Currituck County Industrial Park Stormwater Permit No. SW70406D4 Designer's Certification I, as id A. feel as a duly R .I} - regstered, Professional Engineer in the State .of North Carolina, having been authorized to observe ,(periotlicallylwee#clylfull time) the construction of the project, T POCL - - --- -._(Project) Fnrr (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. o _ MAN Registration Number OZ Date +++ 10A CARD SEAL 025158 C?/ 1 S January 17, 2012 To Whom It May Concern: R E, ., V E D JAN302012 DWQWVJaR0 As the owner of Parcel Number 123EO0000100000 (Lot 10 of Currituck Industrial Park) in Currituck County, I hereby grant permission to David M. Shields to apply for an erosion control permit and perform land disturbing activities on said lands owned by David M. Shields, in conjunction with the construction of the Outer Banks Amusements warehouse facility. The land disturbance shall be limited to areas adjacent to the northern, western and eastern property lines of Lot 10. Sincerely, David M. Shields Owner of Lot 10, Currituck Industrial Park. P.O. Box 1099 Kitty Hawk, NC 27949 (NOTARY) I, —AyaAcgynR A (b.ev--s , as a notary public certify under the pains and penalties of perjury that I witnessed the si nature of 1)176d M Ski &ds and the individual's identity was verified, on this date , 2012. My commission expires on t() 20 j Z0 l b Pp Notary Putout Pasquotank county =My Commission Exores_ 10/20/201 6 \\ti cAR0\.���. �/11lI1111100,` • ME MA u•• H_ I OFFICE USE ONLY 'J Date Receive(l Fee Paid Permit Number d State of North Carolina SW R� ®��A �artment of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original I. GENERAL INFORMATION 1. Applicants name (specify the name of the corporation, individual, etc, who owns the project): Farr Develonine. LLC 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Mr. Steve Farr 3. Mailing Address for person listed in item 2 above: 6032 Currituck Rd. City: Kitty Hawk State: NC "Lip: 27949 Telephone Number: (757) 449-4974 4. Project Name (subdivision, facility, or establishment name - sltould be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Curdtuck Industrial Park 5. Location of Project (street address): Project is located at the east end of Dr. Newbcrn Road (SR-1 1 16) City: Popular Branch Township County: Currituck 6. Directions to project (from nearest major intersection): Project is located at the cast end of Dr. Newbern Road (SR-1 116), approximated 2000 ft. cast of the intersection of SR-1 1 16 and US 158 7. Latitude: Longitude: 8. Contact person who can answer questions about the project: Name: David A. Deel Telephone Number: II. PERMIT INFORMATION: 1. Specify whether project is (check one) New Renewal of project 252)261-3300 X Modification Form SWU-101 Version 3.99 Page I of 4 N 3 If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number SW7040604 and its issue date (if known) Specify the type of project (check one): ]" h R ". rA Low Density X High Density Redevelop General Permit Other 4. Additional Project Requirements (check applicable blanks): �CAMA Major X Sedimentation/Erosion Control �404/401 Permit _NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION I. 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. Stormwater is collected via roadside swales to proposed wet detention basins (4-Basisns) located in the four corners of the site. 2. Stormwater runoff from this project drains to the Pasquotank River basin. 3. Total Project Area: 72.43 acres 4. Project Built Upon Area: 65 % 5. How many drainage areas does the project have? 5 6. 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 Receiving Stream Class Drainage Area SEE ATTACHED TABLE Existing Impervious* Area Proposed Impervious *Area % Impervious* Area (total) Impervious` Surface Area Drainage Area I Drainage Area 2 On -site Buildings On -site Streets On -site Parking SEE ATTACHED TABLE On -site Sidewalks Other on -site Off -site Total: Total: * Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks. gravel areas, etc. Form SWU-101 Version 3.99 Page 2 of 4 7. I -low was the off -site impervious area listed above derived? Auto -CAD Area Routine IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS The following italicized deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. 1. Tire following covenants are intended to ensure ongoing compliance with state storrnwater, management permit number SW704064 as issued by the Division of Water- Quality. These covenants may not be changed or deleted without the consent of the. State. 2. No more than 05, °fin square feet of any lot shall be covered by structures or impervious materials. Impervious materials include asphalt, gravel, concrete, brick, stone, slate or• similar material but do riot include tvood decking or the water surface ofswimrrning pools. 3. Sfvales shall riot be filled in, piped, or, altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of tine perm itted amount requires a state storm water, management permit modification prior• to construction. 5. All permitted runoff from outparcels or future development shall be directed into the permit led stornnsvarer- control system. These connections to the storm water, control system shall be perforated in a mariner that maintairns the integrity and performance of the system as permitted. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required above, that the covenants will be binding on all parties and persons claiming under thern, 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 storrnwater management permit supplement fOFIII(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 SWU-102 Wet Detention Basin Supplement Form SWU-103 Infiltration Basin Supplement Form SWU-104 Low Density Supplement Form SWU-105 Curb Outlet System Supplement Form SWU-106 Off-Sit.e System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neese River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement Form SWU-101 Version 3.99 Page 3 of . r , Vt. 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 Regional Office. 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 Storrmvater Management Permit Application Form D A l7 • One copy of the applicable Supplement Form(s) for each BMP _ M I) • Permit application processing fee of $420 (payable to NCDENR) a kfl • Detailed narrative description of storrnwater treatment/management DA D • Two copies of plans and specifications, including: DA t) 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 storrnwater control measures - Wetlands delineated, or a note on plans that none exist Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or first): Quible and Associates Mailing Address: P O Drawer 870 City: Kitty Hawk State: NC Zip: 27949 Phone: 252 261-3300 Fax: (252) 261-1260 Vill. APPLICANT'S CERTIFICATION 1, (print or type name of person listed in General Information, item 2) certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will constructed in conformance with the approved plans, that the required deed restrictions and protective cove ants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2l 000. Signatu Date: AX� IK- Form SWU-101 Version 3.99 Page 4 of 4 -s U �- S 4 U S i-_ -. &/ n, j r � I ' 0 r) � 1 CC,'! ` n ;,, y Basin Information Drainage Area 1 Drainage Area 2 FDrainage Area 3 Drainage Area 4 Drainage Area 5 Rec. Stream Name c vc r:rug � ,�, � r,� f c?r1�+c� (,; r, 'v oul�cl , rr � •,r,r.;. <? rsc � C L Score( vrri Rec. Stream Class ,�. Sc Drainage Area 711 6 E 1. 2 6 47A if 525, L: C> i 1' 126, /1?7� Ex. Imperv. Area Prop. Imperv. Area 2�2 a , f 8RIq IF 345, S . _ 5 E 06 5 t_' % Imperv. Area 6.5. 8 1 67, 3 Impervious Area Draina e Area 1 =DrainagS_Area 2 Drainage Area 3 Drainage Area 4 :[Drainage Area 5 On -Site Buildings akt On Site Streets •; � 4 7 4 � � � P. 4 � �, � 6 i" On -Site Parking On -Site Sidewalks h Sa f 317,.Z4A£ Other On -Site Fvlvre kallJeo'Itp. FOUY,, t,�l Devcice. 1'v1s)rr Levi Devel_p. Fvinre Loi PevFla1>. C7 Off -Site D d Q Total: 465 222 fF LTotal:a5A, IB s� Total: /? 98S 5-c Total: 34.5, 8B6,,� Total: 106 �- ROY COOPER Governor MICHAEL S. REGAN Secretary WILLIAM E. (TOBY) VINSON, JR Interim Director Farr Developing, LLC Attention: Mr. Steven M. Farr 126 Chicahauk Trail Kitty Hawk, NC 27949 Dear Mr. Farr: INS � G NORTH CAROLINA Environmental Quality September 10, 2018 Subject: Stormwater Permit Renewal Stormwater Management Permit SW7040604 Currituck Industrial Park Currituck County A Division of Energy, Mineral, and Land Resources file review has determined that . Stormwater Permit SV 7040604 for a stormwater treatment system consisting of four wet detention ponds serving the Currituck Industrial Park located at the East end of Dr. Newbern Road in Currituck County expires on May 19, 2019. This is a reminder that permit renewal applications are due 180 days prior to expiration. We do not have a record of receiving a renewal application. Please submit a completed permit renewal application along with a $505.00 fee for permit renewal. Permit application forms for renewal can be found on our website at: iittps:/Ideq.nc^ oovv/about/divisions/energy-mineral-land-resoui-ces/enemy-mineral-land- rule,s'Istormwater-program/post-construction. North Carolina General Statutes and the Coastal Stormwater rules require that this property be covered under a stormwater permit. Failure to maintain a permit subjects the owner to assessment of civil penalties. If you have questions, please feel free to contact me at (252) 948-3923. 1 will be glad to discuss this by phone or meet with you. If you would like I can e-mail you a copy of the renewal application. You can request a copy by e-mailing me at roger.thorpe@ncdenr.gov. Sincerely, Roger K. Thorpe Environmental Engineer DEQMAMH North Carolina Department of Environmental Quality I Dhrisbn of Energy, Mineral and Land Resources Washington Regional Office 1 943 Washington Square Mail I Washington, North Caroltna 27889 252.946.6481 Permit No. (to be provided br DIV& State of North Carolina Department of Environment and Natural Resources RECEIVED Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM APR 2 0 2005 WET DETENTION BASIN SUPPLEMENT DWQ-WARO This form may be photocopied for use as an original 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: Currituck Industrial Park Contact Person: David A. Deel Phone Number: (252 261-3300 For projects with multiple basins, specify which basin this worksheet applies to: Basin # elevatiolts Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation areas 3.0 ft. 6.0 ft. T5 ft. Permanent Pool Surface Area 75,633 sq. ft Drainage Area 16.34 ac. Impervious Area 10.75 ac. (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) volumes Permanent Pool Volume 185,288 cu. ft. (combined voltune of main basin and farebov) Temporary Pool Volume 120,358 cu. ft. (volume detained above the permanent pool) Forebay Volume 57,439 cu. ft. (approximately 20% of total volume) Other parameters SA/DAI 0.0764 (surface area to drainage area ratio from DWQ table) Diameter of Orifice -2 in. (2 to 5 day temporary pool draw -down required) Design Rainfall 1.0 in. Design TSS Removal'- 90 % (minimum 85% required) Form SWU-102 Rev 3.99 Page I 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 non- standard 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 95% TSS removal and 90%'I'SS removal. II. 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 DAD �O a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). DAD 00 b. The forebay volume is approximately equal to 20% of the basin volume. DAD '00 c. The temporary pool controls runoff from the design storm event. DAD fah d. The temporary pool draws down in 2 to 5 days. NIA e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) DAD W) f. The basin length to width ratio is greater than 3:1. DAD g. The basin side slopes above the permanent pool are no steeper than 3:1. DAD �� h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). DAD cli. Vegetative cover above the permanent pool elevation is specified. DAD ` j. A trash rack or similar device is provided for both the overflow and orifice. NIA k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. DADI. 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. NIA 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 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. 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 he 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 2.25 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 225 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (/III ill the blanks) Permanent Pool Elevation 6.0 Sediment Removal El. 3.75 175 �tion') Sediment Removal hlevation 3.75Bottom Ele"k---------------------------------------------------- Bottom Elevation 3j1 25% FOREBAY MAIN POND 5. Remove cattails and other indigenous wetland plants when they cover 50010 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 be minimized to the maximum extent practical. Form SWU-lt)2 Rev 3.99 Page 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order.. 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: Mr. Steve Farr Title P S D Address: 6032 Currituck Road, Kitty Hawk, NC 27949 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. I Q h a )s4 n P A , a Notary Public for the State of County of np2C do hereby certify that S-Pv�.��1 P142,0 personally appeared before me this i day of and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, CNRISTIME SEAL My commission expires Form SWU-102 Rev 3.99 Page 4 of 4 i ^ Permit No. (to be provided by DIVQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FO �bCEIVED WET DETENTION BASIN SUPPLEMENT JUN _ 1 2004 This form may be photocopied for use as an original DWQ Stormwater Management Plan Review: DWQ-WARO 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: Jurti uck T,.rl1j�4ricd p�lrk - - -- - -- - - Contact Person: _ Do, / rc1 A , L;��Z , A f`.. Phone Number: (252) Zb 1- 3300 For projects with multiple basins, specify which basin this worksheet applies to: 6a ,s r,' n elevations Basin Bottom Elevation Permanent Pool Elevation Temporary Pool Elevation 3.0 ft. ft. (floor of the basin) (elevation of the orifice) (elevation of the discharge structure overflow) 3 areas Permanent Pool Surface Area K h_32,sq. ft. (water surface area at the orifice elevation) Drainage Area ac. (on -site and off -site drainage to the basin) Impervious Area /o, 7S ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 1 ?,2, i40 cu. ft. (combined volume of main basin and forebay).._. _,.. TemporaryPool Volume ' 1 / 2., 6. & cu. ft. (volume detained above .the permanent pool) Forebay Volume 4 7 34 D cu. ft. (approximately 20% of total volume) Other parameters SA/DAI Diameter of Orifice Design Rainfall Design TSS Removal 2 _0,n7-64. s in. J. h in. —g -- % (surface area to drainage area ratio from DWQ tabl,-' (2 to 5 day temporary pool draw -down required) (minimum 85% required) Rev 3.99 Page 1 of 4 Footnotes: or .NS ' 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 non- standard 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- H. 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 f )A n a. UP J b. D C. LAD d. f. n8,1� 1. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The forebay volume is approximately equal to 20% of the basin volume. The temporary pool controls runoff from the design storm event. The temporary pool draws down in 2 to 5 days. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) The basin length to width ratio is greater than 3:1. The basin side slopes above the permanent pool are no steeper than 3:1. A submerged and vegetated perimeter shelf with a slope of 6:1'or less (show detail). ­ ' Vegetative cover above the permanent pool elevation is specified. A trash rack or similar device is provided for both the overflow and orifice. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 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. ~" mA mechanism is "specified which'will dfain 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) .0 does 0 does not incorporate pretreatment other than a forebay. Maintenance activities shall be performed as follows: 1. 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 Ito 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 usedao 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 22 � feet in the main pond, the sediment shall be removed. When the permanent pool depth reads Z;Z5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 6, 0 Sediment Re oval El. .3, 7_s 75 -------------- -- Sediment Removal Elevation 3, 7 75% Bottom);le anon 3, d _ %--------------------------------------------- --- • Bottom Elevation'....T} O 25% FOREBAY 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 be minimized to the maximum extent practical. Form SWU-102 Rev 3.99 Page 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order. r , 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: 1 r , Item Farr- - Title: Address: 603 i�1Yri�,�c_�C Zood r_1-6Hy n,,)L nlC. 275W Pr Si IQ 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. �I /1-7L> M. Tv 90 a Notary Public for the State of , County of [i QQ _ , do hereby certify that _ _ Y7�p L-L 3 � ,�-_� RA personally appeared before me this 1 '�4 day of, j0 , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, C�R1571NE A. BOY6t: !d0"i ARY pURL.IC DARE �OUTJ'�Y. NC SEAL My commission expires_,,,- Jy ` C)�QD -2 T Form SWU- 102 Rev 3.99 Page 4 of 4 Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM RECEIVED WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original ,J UN — 1 2004 DWQ Stormwater Management Plan Review: pWO_WAR® 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: �Ctltr't1uz�_I,Juj.��r?ui &YL Contact Person: Do ,/ i cl �)a�1 ra ! _ Phone Number: (2� 2) 2 A J _ Gad For projects with multiple basins, specify which basin this worksheet applies to: ca3i� elevations Basin Bottom Elevation ft. (floor of the basin) Permanent Pool Elevation b. ft. (elevation of the orifice) Temporary Pool Elevation 7. S ft. (elevation of the discharge structure overflow) areas • Permanent Pool Surface Area 20, 33 3 sq. ft. (water surface area at the orifice elevation) Drainage Area 1,2, O ac. (on -site and off -site drainage to the basin) Impervious Area 9, 13 . ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SAMA1 Diameter of Orifice Design Rainfall Design TSS Removal 2 Form SWU-102 Rev 3.99 1 33 cu. ft.. (combined. volume. of.main.basinand forebay)_._. cu. ft. (volume detained above the permanent pool) 10'7 cu. ft. (approximately 20% of total volume) /1 0 1 l/- (surface area to drainage area ratio from DWQ tablr' 34�0 - 2 in. (2 to 5 day temporary pool draw -down required) I, a in. D _ % (minimum 85% required) Page 1 of 4 I Footnotes: t 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 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 bath 85% TSS removal and 90% TSS removal. II. REQUIRED ITEMS CHECKLIST The'follbwing '1hecklist 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 f_D a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). DAf) b. The forebay volume is approximately equal to 20% of the basin volume. f) c. The temporary pool controls runoff from the design storm event. f f�An d. The temporary pool draws down'in 2 to 5 days. DAD e. If required, a 30-foot vegetative filtei is provided at the outlet (include non -erosive flow calculations) 0AD f. The basin length to width ratio is greater than 3:1. N g. The basin side slopes above the permanent pool are no steeper than 3:1. nAT) ' ' h. A submerged and -vegetated perimeter shelf with a slope bf 6:1'o"r less (show detail). i. Vegetative cover above the permanent pool elevation is specified. IAA p? j. A trash rack or similar device is provided for both the overflow and orifice. N /A k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. IAA 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. N )A 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 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, swaies, 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 4. 5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4, 5 feet in the forebay, the sediment shall be removed. Sediment Bottom dEl. [5 icon 0.0 FOREBAY 75 BASIN DIAGRAM (ll in the blanks) Permanent Pool EIevation 6 Z Sediment Removal Elevation 1, 5 Bottom Elevation MAIN POND 75% 25 % 5. Remove cattails and other indigenous wetland plants when they cover 50%g of the basin surface. These plants shall be encouraged to grow along the vegetated shelf and forebay berm. b. 1 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. Form SWU-IO2 Rev 3.99 Page 3 of 4 7. All components of the wet detention basin system shall be maintained in good working order. _. A 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: Mr. Sfeye P,,,fr Title: Address:_ L Q 3 C (,rrj or k n:�1 lC; { r� tk N e- , , 2 7149 _ Phon Sign Date Note: The Iegally responsible party should not be a homeowners association unless more than 5O% of the lots have been sold and a resident of the subdivision has been named the president. I, 0 h 2) S-)-, IP �`I�� ;1� '� _ a Notary Public for the State of &�_)' County of Doe , do hereby certify that S�-A L'� I � A2q personally appeared before me this /y . day of and acknowledge the due execution of the forgoing wet detention'basin maintenance requirements. Witness my hand and offcial'seal, CHRIST:NE A. BOYLE NOTARY PUBLIC DARE COUNTY NC SEAL My commission expires Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stonnwater 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: C,urr)�,ick Po(L_ Contact Person: I)a,J; ri A, Dee IPG __ Phone Number. (Z52z ) 2-6 or , For projects with multiple basins, specify which basin this worksheet applies to: S a 5 i 6) elevations Basin Bottom Elevation O ft. (floor of the basin) Permanent Pool Elevation 6 ft. (elevation of the orifice) Temporary Pool Elevation 7 S ft. (elevation of the discharge structure overflow) areas Permanent Pool Surface Area I 11, blS sq. ft. '(water surface area at the orifice elevation) Drainage Area �2`l- r) S ac. (on -site and off -site drainage to the basin) Impervious Area 18. z ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume � � z ,g44 cu. ft. (combined..volume of.main-basin and forebay) Temporary Pool{ Volume A _0 cu. ft. (volume detained above the permanent pool) Forebay Volume �41: 6 5 4 cu. ft. (approximately 20% of total volume) Other parameters SA/DAt Diameter of Orifice Design Rainfall Design TSS Removal 2 In - ;,, in. in. (surface area to drainage area ratio from DWQ tabir' (2 to 5 day temporary pool draw -down required) (minimum 85% required) Form S WU- 102 Rev 3.99 Page k of 4 Footnotes: 4 1 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 non- standard 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. H. 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 pH n 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. DA D c. The temporary pool controls runoff from the design storm event. n� d. The temporary pool draws down in 2 to 5 days.-. n r) 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. g. The basin side slopes above the permanent pool are no steeper than 3:1. _l A D h. A submerged and vegetated perimeter shelf with a slope of 6: l' or less•(show detail): n A T) i. Vegetative cover above the permanent pool elevation is specified. DA2 j. A trash rack or similar device is provided for both the overflow and orifice. 11/A k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 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. in:``A'imctianism is'specified:wlii6 rwiII'drain ihe'basin fo1 rtiaintenan6e o"ran 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) 0 does 0 does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. 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 Ito 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'. Irispect 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 ¢. S feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 4. 5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM ill in the blanks) ---1 0 Permanent Pool Elevation 6 O �— Sediment Re oval El. 1,5 ------------- Bottom Ele ation n, 0 FOREBAY Sediment Removal Elevation %, 5 75% -------------------------------- ; - ..---------- 125 ---77 '"Bottom Elevation" O� "` °k MAIN POND r — .., :.,.c,.... 11 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. b. 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. Form SWU-102 Rev 3.99 Page 3 of 7. 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 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: Mr S �eve rcA tr Title: A P S E 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. a Notary Public for the State of County of pJ oz 45- , do hereby certify that S2t"p V4 n F—AR ri.. personally appeared before me this day of and.acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, CHRlSi'INE A. 8OYLE nO i Af�'f nL�SLtC pA�F COLiCJTY, �tC SEAL y My commission expires J �'2 aU° I Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form may be photocopied for use as an original DWQ 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: (_urr)IUcIz ILL, ,1-,4z�1I P6,1�_ Contact Person: na v i d A. aee l . P. L Phone Number: (26 6 For projects with multiple basins, specify which basin this worksheet applies to: elevations ` Basin Bottom Elevation 3_ ft. (floor of the basin) Permanent Pool Elevation 6 ft. (elevation of the orifice) Temporary Pool Elevation 9 ft. (elevation of the discharge structure overflow) areas w. Permanent Pool Surface Area �4, 430 sq. ft. (water surface area at the orifice elevation) Drainage Area I.2' 0A ac. (on -site and off -site drainage to the basin) Impervious Area 7, 94 ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume 13 7� 7 70 cu. ft. .(combined volume. of main basin and forebay)... . �nF _ 1 .�-..r.-r • . . - n...n.. ,.-' .-.. is .!'�._ ;f rYi .l::' R ", 'rig.. •'.' ':�. �.�.._n •, ��—: .. � �i.ii:+i �t x::,.M; •':.l... M:r vi:....:4 _ � - •.. � i ! ..r ... ...i.. ! Temporary Pool�Volume )8�9 ,� %�., cu.'ft. (volume detained above the permanent pool) Forebay Volume � 3, 13 , cu. ft. (approximately 20% of total volume) Other parameters SA/DA1 _ 0, 0 7b4 (surface area to drainage area ratio from DWQ tabl`' Diameter of Orifice /W - Z i.. in. (2 to 5 day temporary pool draw -down required) Design Rainfall I in. Design TSS Removal 2 q0 % (minimum 85% required) Form S WU-102 Rev 3.99 Page 1 of 4 Footnotes: t 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 non- standard table entries. 2 In the 20 coastal counties, the requirement for a ve getative 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. II. 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). OA L _ _ b. The forebay volume is approximately equal to 20% of the basin volume. DA , c. The temporary pool controls runoff from the design storm event. OA is 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) b ' D f. The basin length to width ratio is greater than 3:1. P7 A f7 g. The basin side slopes above the permanent pool are no steeper than 3: 1. D9 1) h. A submerged and vegetated perimeter shelf witha sfope of 6:1' or less (show detail)."' t31 fi i. vegetative cover above the permanent pool elevation is specified. DH 1) j. A trash rack or similar device is provided for both the overflow and orifice. N / k. A recorded drainage easement is provided for each basin including access to nearest right- of-way. 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. .,.0 . s•.,-s, ..; ...-..-4:.r.,w;.. _._.n.' ..l�. 1._.. _..,�-._ -. s.s .w ;, .,.a r .y Sri ....:.�_.".,-,...._„-..x.x.:.•..................:..: -:.. ».: .ice.:::. i,�.�'S: «'-a_� 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) 0 does X does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 'Odoes not incorporate pretreatment other than a forebay. Form SWU-102 Rev 3.99 Page 2 of 4 Maintenance activities shall be performed as follows: 1. 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 Ito 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. Inspect and repair the collection system (i.e.'caich 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 2. 25 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads ;�,;?5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM (fill in the blanks) Permanent Pool Elevation 6 , U Sediment Re oval El. O, 7S � 75 ...... -- ------ - Sediment Removal Elevation _ t1, 7� 75% Bottom Ele atioa..------ ------------------ ----... ---------------- ------- Bottom EIevati6-3•`n---.....:_.... , 2546 FOREBAY 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 be minimized to the maximum extent practical. Farm SWU-lot Rev 3.99 Page 3 of 7. All components of the wet detention basin system shall be maintained in good working order. — -A 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: Title: Address: 6032 21 �v Ncru)L Alj 2 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, (1),,,,-4 , n-e 14 0<Ty/-- , a Notary Public for the State of N 0— County of 1) F�2 '-' , do hereby certify that 5��� V P n M ' F—A (2 2 personally appeared before me this / day of m A=. aW�L, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, L ,NE A. GOYLEARY PU 3LICCOi}NTY NC SEAL My commission expires avp r7 Form S WU-102 Rev 3.99 page 4 of 4