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HomeMy WebLinkAboutSW8021024_CURRENT PERMIT_20030204STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW.g%&A� DOC TYPE CURRENT PERMIT LJ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE ;2a�jQalvl YYYYMMDD '' „F W A rF., Michael F. Easley, Governor William G. Ross, Jr., Secretary y North Carolina Department of Environment and Natural Resources r y Alan W. Klimek, P.E., Director .� Division of Water Quality Mr. W.J. McLamb, President Farmstead Development Corporation PO Box 338 Shallotte, NC 28459 Dear Mr. McLamb: Wilmington Regional Office February 4, 2003 Subject: Permit No. SW8 021024 Farmstead Subdivision Section I High Density Subdivision Stormwater Project Brunswick County The Wilmington Regional Office received a complete Stormwater Management Permit Application for Farmstead Subdivision Section I on January 24, 2003. 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. SW8 021024, dated February 4, 2003, for the construction of the project, Farmstead Subdivision Section I. This permit shall be effective from the date of issuance until February 4, 2013, 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 1 50B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-3900. Sincerely, (&-'4*"440t'tX ' J.P.4/A- Rick Shiver Water Quality Regional Supervisor .RSS/:arl S:1WQSISTORMWATIPERMIT1021024.FEB03 cc: David A. Hollis, P.E. Town of Calabash Building Inspections Linda Lewis Wilmington Regional Office Central Files 14CDENR N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 (910) 395-3900 Fax (910) 350-2004 Customer Service 800-623-7748 Y IL State Stormwater Management Systems Permit No. SWS 021024 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT r 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. W.J. McLanib Farmstead Subdivision Section I Brunswick County FOR THE construction, operation and maintenance of overall low density with a curb outlet system and 2 wet detention ponds in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stornwater rules ") and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until February 4, 2013, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS I . This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this permit, the Project Data Sheet. The subdivision is permitted for 60 lots, each allowed a maximum of 6,500 ft2 square feet of built -upon area. 3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 4. The uncollected portions of this project propose a curb outlet system. Each of the four designated curb outlet swales shown on the, approved plan must be maintained at a minimum of 100' long with 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and be located in either a dedicated common area or a recorded drainage easement. 2 State StorniNvater Management Systems Permit No. S W8 021024 No piping shall be allowed except those minimum amounts necessary to direct runoff beneath an impervious surface such as a road or under driveways to provide access to lots. G. Runoff conveyances other than the curb outlet system swales, such as perimeter ditches, must be vegetated with side slopes no steeper than 3:1 (H:V). 7. Each pond has been designed using the 90% TSS chart, therefore, a vegetated filter is not T required. 8. All stormwater collection and treatment systems must be located in either dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 9. The overall tract built -upon area percentage for the project must be maintained at 30%, per the requirements of Section .1005 of the stormwater rules. State Stormwater Management Systems Permit No. S\V8 021024 DIVISION OF WATER QUALITY PROJECT DATA SHEET Project Name: Farmstead Subdivision Section I Permit Number: SW8 021024 Location: Brunswick County Applicant: Mr. W.J. McLamb, President Mailing Address: Farmstead Development Corporation PO Box 338 Shallotte, NC 28459 Application Date: January 24, 2003 Receiving Stream 1 River Basin: Hickman's Branch / Lumber Index Number: LBR57 15-23-3 Classification of Water Bodv: "C Sw" Pond Number: Design Storm: Drainage Area, acres: Onsite: Offsite: Total Impervious Surfaces, ftz: Lots at 6,500 ft2: Roads/Parking, ft' Offsite, fe: Pond Depth, feet: Permanent Pool Elevation, FMSL: Permitted Surface Area, ftz: Permitted Storage Volume, ft3: Temporary Storage Elevation, FMSL: Controlling Orifice: 1 2 1.0" 1.0" 3.94 696 3.94 6.96 0 0 95,53.1 128,248 56,668 91,000 38,863 37,248 0 0 6 6 30 31 5,622 6,964 8,868 11,699 31.4 32.5 1.25"cp Pipe 1.5"cp Pipe C1 State StomiNvater Management Systems Permit No. SW8 021024 11. SCHEDULE OF COMPLIANCE No homeowner, lot owner or developer shall fill in, alter, or pipe any drainage feature (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. 2. The permittee is responsible for verifying that the proposed built -upon area for the entire lot, including driveways and sidewalks, does not exceed the allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred to the individual property owner. 3. If an Architectural Review Committee (ARC) is required to review plans for compliance with the BUA Iimit, the plans reviewed must include all proposed built -upon area. Any approvals given by the ARC do not relieve the homeowner of the responsibility to maintain compliance with the permitted BUA limit. 4. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to 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, acquisition, or sale of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 5. 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. The stormwater management system, including collection system, swales and ponds, shall be constructed in it's entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 9. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, a certification must be received from an appropriate designer for the system installed certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. 10. Each lot in the subdivision covered by this permit will maintain a minimum 30 foot wide vegetative buffer between all impervious areas and surface waters. F1 State Stornixvater Management Systems Permit No, S\V8 021024 11. Decorative spray fountains will not be allowed in the stormwater treatment system 12. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stonnwater system function at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of 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 structures, orifice, catch basins and piping. g. Access to all components of the system must be available at all times. 13. 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. 14. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to the amount as shown on the Project Data Sheet, per Section I, Part 2. The recorded statements must follow the form: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 021024, as issued by the Division of Water Quality under NCAC 2H.1000. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water. Quality. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. f. The maximum built -upon area per lot is 6,500 ftZ square feet. This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. i. Filling in, piping or altering any designated 5:1 curb outlet swale associated with the development is prohibited by any persons. This project proposes a curb outlet system. Each designated curb outlet swale shown on the approved plan must be maintained at a minimum of 100' long with 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and be located in either a dedicated common area or a recorded drainage easement. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 0 State Stonnwater Management Systems Perniit No. SWS 021024 15. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of recording the plat, and prior to selling lots. The recorded copy must bear the signature of the Perrittee, the deed -book number and page, and stamp/signature of the Register of Deeds. 16. Permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. T 17. If the stornwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 18. Prior to transfer of the permit, the stormwater facilities must be inspected by DWQ personnel, and determined to be in compliance with all permit conditions. Any items not in compliance must be repaired or replaced to design condition prior to the transfer. Records of maintenance activities performed to date will be required, 19. 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. 20. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. ]III. GENERAL CONDITIONS This permit is not transferable except after notice to and approval by the Director. In the event there is a desire for the facilities to change ownership, or there is a name change of the Penmittee, a "Name/Ownership Change Form" must be submitted to the Division of Water Quality accompanied by appropriate documentation from the parties involved, including as may be required, but not limited to, a deed of trust, recorded deed restrictions, Designer's Certification and a signed Operation and Maintenance plan. The project must be in good standing with DWQ. The approval of this request will be considered on its merits and may or may not be approved. If a homeowner's association or similar organization will be formed to maintain the stormwater facilities, the permit must be transferred at the time the permittee turns over the common areas to the HOA or at the time the permittee no longer holds a majority vote in the association, 2. The permittee is responsible for compliance with the terms and conditions of this permit until such time as the State approves the transfer request. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 4. 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. 5. 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. 7 State Storniwater Management Systems Permit No. SN118 021024 G. 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 ten-nination does not stay any permit condition. 7. Pen-nittee grants permission to staff of the DWQ to access the property for the purposes of inspecting the stormwater facilities during normal business hours. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. 4. A copy of the approved plans and specifications shall be maintained on file by the Pennittee for a minimum of ten years from the date of the completion of construction. Permit issued this the 4th day of February, 2003. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION A 42 /3,0,0,4- AranAWKlimek, P.E., Director 4-01 Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW8 021024 0 State Storni,vatcr Management Systems Permit No, SW8 021024 Farmstead Subdivision Section i Stonnwater Permit No. SW8 021024 Brunswick County Designer's Certification Pagel of 2 I, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form are a part of this Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL 9 State Stormwater Management Systems Permit No. S`'l'8 021024 Certification Requircments: 1. 2. 4. a 10 11 12 13 14 Page 2 of 2 The drainage area to the system contains approximately the pernitted acreage. The drainage area to the system contains no more than the permitted amount of built -upon area. All the built -upon area associated with the project is graded such that the runoff drains to the system. The outlet/bypass structure elevations are per the approved plan. The outlet structure is located per the approved plans. Trash rack is provided on the outlet/bypass structure. All slopes are grassed with permanent vegetation. Vegetated slopes are no steeper than 3:1. The inlets are located per the approved plans and do not cause short-circuiting of the system. The permitted amounts of surface area and/or volume have been provided. Required drawdown devices are correctly sized per the approved plans. All required design depths are provided. All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. The overall dimensions of the system, as shown on the approved plans, are provided. cc: NCDENR-DWQ Regional Office Town of Calabash Building Inspections r 10 i 4 `hi _ ..::OFFICE::.USE ONLYti'..::.,..:.. Date Received Fee Paid Permit Number 336�'D. lO State of North Carolina Department of Environment and Natural Resources Division of Water Quality I 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): -rf7_rVS4'/�� 2, Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): tll J. MG LATAc , 7P,z Si Li. -G_/Ili 3. Mailing Address for person listed in item 2 above: City: ±l-.A 1_ 0 Tr-t E - R State: N C T Zip: - Telephone Number: ( 1 0 ) . 75-4-7 / 7 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications,: letters, operation and maintenance agreements, etc.),. 5. Location of Project (street address): /0C- L4M&, ZDA-o City: _ r'Lfi L_PAP(!5 k County:, 6. Directions to project (from nearest major intersection): 2Qrvt �1.5 i �2SbG7rc r. f I-7- SOr i TFf .MC q6 1 Es R: 7 0 S 2 u T o Spe 130 '" D. !a r, i,, P� cr �.0 7. Latitude: lV 3 S .� �+ Longitude:_ ����a�_z / of project 8. Contact person who can answer questions about the project: Name: t Vic! r_a - _ -f oL-L ! S Telephone Number: 41- 9626_ II. PERMIT INFORMATION: 1. Specify whether project is (check one):y New Renewal Modification ORIGINAL Form SWU-101 Version 3.99 Page l of 4 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number N�14a _ and its issue date (if known) N A 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 �404/401 Permit _NPDES Stormwater Information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748. III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. 2 k)F--r Ds.-7 '6nl-r,o,,l rnLS , 4= 2. Stormwater runoff from this project drains to the River basin. 3. Total Project Area: S,9 - q& acres 4. Project Built Upon Area: 2.q - I Z % 5. How many drainage areas does the project have? N. 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. 13asin:Informatian Drauiage ;?.rea 1 :: - Drama e; Area:2 g .. .._. . Receiving Stream Name Receiving Stream Class f l Drainage Area t / Existing Impervious' Area Proposed Impervious`Area % Impervious' Area (total) iTiperVlollsSUlfaCe`.Area .,, i,.n, .,::-:: l�ral[lagE'AIea l I�TaIllagO_Area On -site Buildings On -site Streets On -site Parking On -site Sidewalks Other on -site Off -site I Total: _ Total I Impervious area is defined as the built upon area including, bur not limited to, buildings, roads, parking areas. sidewalks, gravel areas. etc. �firk­ IoIn Form SWU-101 Version 3.99 Page 2 of 4 DRAINAGE AREA TABLE for Farmstead Golf Course Brunswick County, NC Basin Information Drainage Area Drainage Area Overall Site - Brunswick County, NC Section 1 - Total Project Area Receiving Stream Name Hickmans Branch Hickmans Branch Receiving Stream Class C: Sw C: Sw Drainage Area 13,601,520 SF 1,738,336 SF Existing Imp2rvious Area 116,211 SF 15,685 SF ,Proposed Imp2rviousArea 50, 524716&oI4- SF SZ(-95;4S91&5 SF Impervious Area 1 4.69% 1 29.98% 0'V&_-11 S2ctl�n 1 Impervious Surface Area Drainage Area4y Drainage Area On -Site Buildings 402,350 SF 390,350 SF On -Site Streets 159,324 SF 127,818 SF On -Site Parking 50,104 SF 0 SF On -Site Sidewalks 2,448 SF 0 SF Other On -Site Cartaths) 325,074 SF 2,997 SF Off -Site 0 SF 0 SF Total: 1 561,674 JSFJ 521,165 ISF1 Basin Information Drainage Area Drainage Area Drainage Area within Section 1 to Pond #1 Drainage Area within Section 1 to Pond #2 Receiving Stream Name Hickmans Branch Hickmans Branch Receiving.Stream Class C: Sw C: Sw Drains a Area 171721 SF 303325 SF Existing Ime2rvious Area 0 SF 0 SF Pro sed Impervious Area 95531 SF 128248 SF Impervious Area 56% 42% Impervious Surface Area Drainage Area Al Drainage Area Vjl On -Site Buildings 36668 SF 66000 SF On -Site Streets 38863 SF 37248 SF On -Site Parking 0 SF 0 SF On -Site Sidewalks 0 ISF, 0 ISF Other On -Site (Driveways) 20000 SF 25000 4SF SF Off -Site 0 1 SF 0 Total: 95531 JSFJ 128248 $F 7. How was the off -site impervious area listed above derived? >'J /4 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. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number Sw ;5 O Z 1OZ ¢ as issued by the Division of Water Quality. These covenants may not be changed or deleted without the consent of the State. Z No more than �, 500 square feet of any lot shall be covered by structures or impervious materials. Impervioug materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood decking or the water surface of swimming pools. 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings. 4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to construction. 5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control system. These connections to the stormwater control system shall be performed in a manner that maintains 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 them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Form 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 -Site System Supplement Form SWU-107 Underground Infiltration Trench Supplement Form SWU-108 Neuse River Basin Supplement Form SWU-109 Innovative Best Management Practice Supplement — —rrr ,n. <I_ - __ n--- �? _r.t .i. VI. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Regional Office. 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Original and one copy of the Stormwater Management Permit Application Form • One copy of the applicable Supplement Form(s) for each BMP Permit application processing fee of $420 (payable to NCDENR) • Detailed narrative descriptiono f sto=water treatment/management • Two copies of plans and specifications, including: - Development/Project name - Engineer and firm - Legend - North arrow - Scale - Revision number & date - Mean high water line Dimensioned property/project boundary - Location map with named streets or NCSR numbers Qriginal'contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, cr 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) VE. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. Designated agent (individual or firm): r � i . I I Mailing Address:.'1L 5C� tR �r� r' t City: State:_ KIC Zip: - v Phone: ��'� ) ��--� �n1 ^, Fax:-- VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) w • J m c l —L;, r'Y, 6 certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A NCAC 2H .1000. Date: M Form SWU-101 Version 3.99 Page 4 of Permit No. SW 8 02 (UZ 4- (to be provided by DWQ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM LOW DENSITY SUPPLEMENT This form may be photocopied for use as an original A low density project is one that meets the appropriate criteria for built upon area and transports stormwater runoff primarily through vegetated conveyances. Low density projects should not have a discrete stonnwater collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can be found in 15A NCAC 2H .1005 through .1007. PROJECT INFORMATION Project Name : _ _s(]/1S'� F is f> j Ec1-ri 0 hl I Contact Person: V i o LIr i S Phone Number: (q 1 D ) —7-S`f - 9OZI Number of Lots: & O Allowable Built Upon Area Per Lot*: 6 S00 *If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon area for each lot. The attachment must include the project name, phase, page numbers and provide area subtotals and totals. II. BUILT UPON AREA See the Stormwater Management Permit Application for specific language that must be recorded in the deed restrictions for all subdivisions. For uniform lot sizes, complete the following calculation in the space provided below where: • SA Site Area - the total project area above Mean High Water. Wetlands may be excluded when the development results in high density pockets. • DF Density Factor - the appropriate percent built upon area divided by 100. • RA Road Area - the total impervious surface occupied by roadways. • OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc. • No. Lots - the total number of lots in the subdivision. • BUA/Lot - the computed allowable built upon area for each lot including driveways and impervious surfaces located between the front lot line and the edge of pavement. Form SW U-104 Rev 3.99 Page I of 2 Calculation: (SA x DF) - RA - OA = BUA No, Lots Lot 5r X 0, SO) — 12-7. (dD cars 65-/1, 43 sr% r III. REQUIRED ITEMS CHECKLIST Initial in the space provided to indicate that the following requirements have been met and supporting documentation is provided as necessary. If the applicant has designated an agent on the Stormwater Management Permit Application Form, the agent may initial below. Applicants Initials a. A 30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse River basin may require additional buffers. b. Deed restriction language as required on form SWU-101 shall be recorded as a restrictive covenant. A copy of the recorded document shall be provided to DWQ within 30 days of platting and prior to sale of any lots, t c. Built upon area calculations are provided for the overall project and all lots. i)Art- d. Project conforms to low density requirements within the ORW AEC (if applicable). [I 5A NCAC 2H ,1007(2)(b)] Form SWU-104 Rev 3.99 Page 2 of 2 Permit No. U -a- (to be provided by WQ ) State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM CURB OUTLET SYSTEM SUPPLEMENT FOR LOW DENSM DEVELOPMENT WITH CURB AND GUTTER This form may be photocopied for use as an original DWQ Stormwater_Management _Plan _Review: A complete stormwater management plan submittal includes a stormwater management permit application, a curb outlet system supplement, a low density supplement, design calculations, and plans and specifications showing all stormwater conveyances and curb outlet details. I. PROJECT INFORMATION Project Name . _ �;4 2�v� �_ !, Contact Person: . � c r_ ,AI�)„L f c _ Phone Number: (L? 1 O) Curb outlets to (check one): 0' Swale 0 Vegetated Area 11. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the North Carolina Administrative Code Section ISA NCAC 2H .1008. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent on the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Applicants Initials a. b. Curb outlets direct flow to a swale or vegetated area. Swales or vegetated areas receiving curb outlet flow are designed to carry, at a minimum, the peak flow from the 10-year storm. c. Flow velocity is non -erosive for peak flow from the 10-year storm event_ d. Longitudinal slope of the swale or vegetated area does not exceed 5%. e. Side slopes of the swale or vegetated area are no steeper than 5:1 (horizontal to vertical). f. Length of swale or vegetated area is > 100 feet. _ g. The system takes into account the run-off at ultimate built -out potential from all surfaces draining to the system (delineate drainage area for each swale). h. Swales are located in recorded drainage easements. i. Grass type(s) for permanent vegetative cover specified on detail. j. Swale detail provided on plans. Form SWU-105 Ver 3.99 Page 1 of 3 ORIGINAL 111. DESIGN INFORMATION 1W- Complete the following table. If additional space is needed the information should be provided in the same format as Table I and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State of North Carolina Erosion and Sediment Control Planning and Design Manual. Table 1. Swale Design Information ' ". "Impervious - a ac) Qrassed "'.Area( (k) MNo .,Wdle,N0ramag :K U fts)"" V.:- 'Flow 1. 1. 02 0,42— 0 Q-50 4 2 0,5S 1 0.46 O.DR 0-91 S164 S 1 13 3 b. S 0.6-7 0 20 0. q9 s-43 5- 1 64 6 4 5 6 7 8 9 10 I 12 13 14 15 15 17 18 19 20 21 22 23 24 25 -V 1 - I I r- % Form SWU- 105 1 `�er 3.99 Paue 2 of 3 I , , . tP -.r • I III. CURB OUTLET SYSTEM MAINTENANCE REQUIREMENTS 1. Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches at any time. 2. Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up, erosion, and trash accumulation. 3. Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded following sediment removal. 4. Eroded areas of the swales will be repaired and reseeded. Swales will be revegetated as needed and in a timely manner based on the monthly inspections. 5. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts, velocity reduction devices and piping. 6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality. I acknowledge and agree by my signature below that I am responsible for the performance of the six maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Print Name and Title: Address 0 Phone: qiO- -i b4- -I 17 Signatur ' - rl - Note: The legally responsible party a resident of the subdivisioA Date: 1p—,:;41-0 2. not be a homeowners association unless more than 50% of the lots have been sold and been named the president. i Imo�• a Notary Public ffor the StateofC �^�� , County of `\) 1,ri' \ ; c-L . do hereby certify that l 3 7, �tiGL-C .►�J , personally appeared before me this day of f r3�S a. and acknowledge the due execution of the forgoing infiltration basin maintenance requirements. Witness my hand and official seal, My commission expires I Form SWU-105 Ver 3.99 Page 3 of 3 r, 1 �l�} �°�� , 11 � ,.�tl gyp' .ti�'�+ ' '� ' �. �, 'R •s � u•i; ~ a , - `Jy L F�y,.,v PU�J:7C�.iutii: t . .'� � i' Permit No. ;�Jg6al6Q (to be provided DW& 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 IDWO Stormwater Manaizement 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. PROTECT INFORMATION Project Name: +` lam, n�. ` r E_ r. C G , r r•.'l Contact Person: r r` ? �-o L L t S, Phone Number: (? f (3) For projects with multiple basins, specify which basin this worksheet applies to: A.s (N elevations Basin Bottom Elevation 2 4-, D o ft Permanent Pool Elevation 3 0, 00 ft. Temporary Pool Elevation 3 i , 4 ft. areas Permanent Pool Surface Area 5 (a 2 2 sq. ft. Drainage Area 3 - R ¢ ac. Impervious Area 2— 1 q ac. volumes Permanent Pool Volume 9 R cu. ft. Temporary Pool Volume Forebay Volume Other parameters SA/DA1 Diameter of Orifice Design Rainfall Design TSS Removal.2 Form SWU-102 Rev 3.99 (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) (approximately 20% of total volume) (surface area to drainage area ratio from DWQ table) 2 S in. (2 to 5 day temporary pool draw -down required) D D in. O % (minimum 85% required) ORIGINAL Page I of 4 Footnotes: ` When using the Division SA/DA 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 to 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. 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 Foram, the agent may initial below. If a requirement has not been met, attach justification. 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. c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) 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. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). L Vegetative cover above the permanent pool elevation is specified. j. A trash rack or similar device is provided for both the overflow and orifice. 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. - 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 @' does not incorporate a vegetated filter at the outlet. This system (check one) 0 does V'd oes not incorporate pretreatment other than a forebay. Form S WU-102 Rev 3.99 Page 2 of 4 L ' T 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 2 to 5 days as designed. 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wet detention basin or stream, etc.). The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads ¢' SO feet in the main pond, the sediment shall be removed. When the permanent pool depth reads Z. 25 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM �i11 in the blanks) Permanent Pool Elevation 3 �• �d Sediment Re oval El. 2. �S 75 ° -------------- - Sediment Removal Elevation 75% Bottom Ele ation 2ao0 1- %------- -------------------------5--,---- --1-25% BottomElevation Z4,ab 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. 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 Title:`N_ Address: n� Phone: c10 - -7 54 - -7 )--7 Signature: 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. T, S a Notary Public for the State of _ � (�} as f'ht7u County ofs�T.S�c� y _, do hereby certify that personally appeared before me this g2�4-_ day of Oc�,-Vasay— a ; and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, SEAL My commission expires Form SWU-102 Rev 3.99 Page 4 of 4 Permit No. JC'--)z3 6':� 10a (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. L PROJECT INFORMATION Project Name: Contact Person: �A-v 1 i` A •..�1:12 L_ f S _ Phone Number: ( q (0) H. 4 — eo2_ q For projects with multiple basins, specify which basin this worksheet applies to: 2Ya -1i,1 * 2 elevations Basin Bottom Elevation 2-5, 0 O ft. (floor of the basin) Permanent Pool Elevation 3 l - 00 ft. (elevation of the orifice) Temporary Pool Elevation 32, 5O ft. (elevation of the discharge structure over areas Permanent Pool Surface Area sq. ft. (water surface area at the orifice elevation) Drainage Area ( Q(o ac. (on -site and off -site drainage to the basin) Impervious Area 2, Q4 ac. (on -site and off -site drainage to the basin) volumes Permanent Pool Volume Temporary Pool Volume Forebay Volume Other parameters SAIDAI Diameter of Orifice Design Rainfall Design TSS Removal 2 3 4 cu. ft. (combined volume of main basin and forebay) 1 E (aR cu. ft. (volume detained above the permanent pool) _ 2 Ca 4- ! cu. ft. (approximately 20% of total volume) 2 , 2_2— (surface area to drainage area ratio from DWQ table) ),50 in. (2 to 5 day temporary pool draw -down required) 1.00 in. q d % (minimum 85% required) Form SWU-102 Rev 3.99 Page Z of 4 ORIGINAL 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 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. Applica is Initials a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). b. The forebay volume is approximately equal to 20% of the basin volume. c. The temporary pool controls runoff from the design storm event. d. The temporary pool draws down in 2 to 5 days. e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow calculations) 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. h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail). i. Vegetative cover above the permanent pool elevation is specified. j. A trash rack or similar device is provided for both the overflow and orifice. 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. m. A mechanism is specified which will drain the basin for maintenance or an emergency. IIL 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 doesQ'does not incorporate a vegetated filter at the outlet. This system (check one) 0 does 0%es not incorporate pretreatment other than a forebay. Form S WU-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, 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 4- S(D feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM 6611 in the blanks) p Permanent Pool Elevation 3r, Od Sediment Re oval El. 2 �S475------------ Sediment Removal Elevation ZCp S� 75% Bottom Ele anon2�, Dv ----------------------------------=----�------------ Bottom Elevation �, 00 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. 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: Q of MG Title: Address" 1--I&� Phone: `-) k) - _] 50 — -7 1 7 7 Signature: Date: kU l-v �- 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 a Notary Public for the State of County of do hereby certify that V3 �ALC-J-'"- personally appeared before me this day of 0466 �16--, and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, Z f N- SEAL My commission expires /(0 6 Form S W U-102 Rev 3.99 Page 4 of 4