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HomeMy WebLinkAboutSW7170915_Modification_20190610ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Interim Director NORTH CAROLINA Environmental Quality Allied Properties, LLC June 10, 2019 Attn: Justin M. Old, Registered Agent 417 Caratoke Hwy Unit D Moyock, NC 27958 Subject: Stormwater Permit No. SW7170915 Modification Waterleigh Subdivision Low Density Subdivision with a Curb Outlet Swale System Currituck County Dear Justin M. Old, The Washington Regional Office received a complete Stormwater Management Permit Application for the modification of the Waterleigh Subdivision permit number SW7170915 on April 25, 2019. The modification involves adding 47 lots and the associated impervious area. 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. SW7170915, dated June 10, 2019, for the construction, operation and maintenance of the subject project. This permit shall be effective from the date of issuance until rescinded, shall void permit SW7170915 issued October 5, 2017 and permit modification SW7170915 issued on September 12, 2018 and shall be subject to the conditions and limitations as specified therein, and does not supercede any other agency permit that may be required. Please pay special attention to the conditions listed in this permit regarding the Operation and Maintenance of the SCM(s), recordation of deed restrictions, certification of the SCM's, procedures for changing ownership, and transferring the permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system, to record deed restrictions, to certify the SCM's, to transfer the permit, or to renew the permit, 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 further assistance concerning this matter, please contact me at (252) 946-6481. Sincerely, William Carl Dunn, PE Environmental Engineer cc: David A. Deel, PE — Deal Engineering, PLLC (PO Box 3901, Kill Devil Hills, NC 27948) Currituck County Inspection Washington Regional Office �FQ North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources j Washington Regional Office 1 943 Washington Square Mall I Washington, North Carolina 27889 r"^""""YOi��� 252.946.6481 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT LOW DENSITY SUBDIVISION DEVELOPMENT WITH A CURB OUTLET SWALE SYSTEM 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 Allied Properties, LLC Waterleigh Subdivision Campus Drive, Moyock, Currituck County FOR THE construction, operation and maintenance of a 24% low density subdivision in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications, and other supporting data as attached and on file with and approved by the Division of Energy, Mineral, and Land Resources (Division) and considered a part of this permit. The Permit shall be effective from the date of issuance until rescinded and shall be subject to the following specific conditions and limitations: I. DESIGN STANDARDS 1. The project is permitted for 134 lots, each limited to a maximum of (see Attachment) square feet of built -upon area, as defined by the stormwater rules, and as indicated in the approved plans. 2. The overall tract built -upon area percentage for the project must be maintained at or below 24%, per the requirements of Session Law 2006-246 and Section .1005 of the stormwater rules. 3. The built -upon areas associated with this project shall be located at least 50 feet landward of all perennial and intermittent surface waters. 4. 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). All roof drains must terminate at least 50 feet from the mean high water mark of surface waters. Approved plans and specifications for projects covered by this permit are incorporated by reference and are enforceable parts of the permit. This project proposes a curb outlet system. Each designated curb outlet swale or 1 00'vegetated area shown on the approved plan must be maintained at a minimum of 100' long, maintain 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. 8. Four wet ponds have been proposed to meet the requirements of Currituck County's Stormwater Management Ordinance and as such are not part of this permit, II. SCHEDULE OF COMPLIANCE Curb outlet swales, swales and other vegetated conveyances shall be constructed in their entirety, vegetated, and be operational for their 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 swales or other vegetated conveyances will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to operate the permitted stormwater management systems at optimum efficiency to include: a. Inspections b. Sediment removal. C. Mowin.9, and re -vegetating of the side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Maintenance of level spreaders and infiltration areas in accordance with approved plans and O&M documents. 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 any of the items shown on the approved plans, including the stormwater management system, design concept, built -upon area, details, etc. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, or selling of the project area. f. Filling in, altering or piping any vegetative conveyance shown on the approved plan. 5. The permittee shall submit all information requested by the Director or his representative within the time frame specified in the written information request. 6. No piping shall be allowed except that minimum amount necessary to direct runoff beneath an impervious surface such as a road and that minimum amount needed under driveways to provide access to lots. 7. Each designated curb outlet swale or 100' vegetated area shown on the approved plan must be maintained at a minimum of 100 long, maintain 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. 8. By issuance of this permit, the Division is granting a minor variance to the no piping requirements and the curb outlet minimum requirements as set in 15A NCAC 2H.1005(2)(a)(ii), at locations as designated on the approved plans for the management of the four wet ponds. The additional treatment gained through the wet ponds provides the means for granting the minor variance. 9. Within 30 days of completion of the project, the permittee must certify in writing that the project's stormwater controls, and impervious surfaces have been constructed within substantial intent of the approved plans and specifications. Any deviation from the approved plans must be noted on the Certification. 10. The permittee is responsible for verifying that the proposed built -upon area 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, and responsibility for meeting the built -upon area limit is transferred to the individual property owner, provided that the permittee complies with the requirements of Section 11.12 and 11.13 of this permit. 11. Deed restrictions are incorporated into this permit by reference and must be recorded with the Office of the Register of Deeds prior to the sale of any lot. Recorded deed restrictions must include, as a minimum, the following statements related to stormwater management: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW7170915, as issued by the Division of Energy, Mineral, and Land Resources 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. C. 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 Energy, Mineral, and Land Resources. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Energy, Mineral, and Land Resources. f. The maximum built -upon area per lot is (See Attachment) 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, brick, stone, slate, and coquina, but does not include raised, open wood decking, or the water surface of swimming pools. g. Filling in or piping of any vegetative conveyances (ditches, swales, etc.) associated with the development except for average driveway crossings, is strictly prohibited by any persons. h. Each lot will maintain a 50 foot wide vegetated buffer between all impervious areas and surface waters. i. All roof drains shall terminate at least 50 foot from the mean high water mark. j. If permeable pavement credit is desired, the property owner must submit a request, with supporting documentation, to the permittee and receive approval prior to construction of the permeable pavement. 12. The permittee shall submit a copy of the recorded deed restrictions within 30 days of the date of recording. 13. If the permittee sets up an Architectural Review Committee or Board (ARC or ARB) to review plans for compliance with the restrictions, the plans reviewed must include all proposed built -upon area (BUA). Any approvals given by the ARC or ARB do not relieve the lot owner of the responsibility to maintain compliance with the permitted BUA limit. 14. All stormwater conveyances will be located in either dedicated right-of-way (public or private), recorded common areas or recorded drainage easements. The final plats for the project will be recorded showing all such required easements, in accordance with the approved plans. 15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS 1. This permit is not transferable to any person or entity except after notice to and approval by the Director. The Director may require modification or revocation and re -issuance of the permit to change the name and incorporate such other requirements as may be necessary. In the event of a name or ownership change, a completed Name/Ownership Change form, signed by both parties, must be submitted to the Division of Energy, Mineral, and Land Resources accompanied by the supporting documentation as listed on page 2 of the form. The approval of this request will be considered on its merits, and may or may not be approved. 2. The permittee is responsible for compliance with all permit conditions until the Director approves a transfer of ownership. Conveyance of common areas to third parties, such as a homeowner's association, by the permittee, where the required Name/Ownership Change form has not been submitted to and approved by the Division, does not constitute transfer of the stormwater permit and does not relieve the permittee of responsibility for maintaining compliance with the permit or transferring the permit. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an enforcement action by the Division of Energy, Mineral, and Land Resources, in accordance with North Carolina General Statutes 143- 215.6A to 143-215.6C. 4. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules, and regulations contained in Session Law 2006-246, Title 15A of the North Carolina Administrative Code, Subchapter 2H.1000; and North Carolina General Statute 143-215.1 et. al. 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 the Division, such as the construction of additional or replacement stormwater management systems. 6. The permittee grants permission to DENR Staff to enter the property during normal business hours, for the purpose of inspecting all components of the stormwater management facility. 7. The permit issued shall continue in force and effect until revoked or terminated. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re -issuance, or termination does not stay any permit condition. 8. Unless specified elsewhere, permanent seeding requirements for the swales must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 9. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. 10. 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. 11. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. Permit issued this the 10th day of June, 2019. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION for Danny Smith, Interim Director Division of Energy, Mineral, and Land Resources By Authority of the Environmental Management Commission Permit Number SW7170915 WATERLEIGH PHASES 1, 2 4 Residential Subdivision Attachment A Allowable Built -Upon Area and Deed Restriction calculations Lot No. Lot Area (W) Max. Albwa i e Runk -Upon area (fta) .3--A 20,013 6,004 2 20,000 6,p00 3 MOW 6,000 4 20,000 6,pDD 5 20,002 6,001 6 20,003 61001 7 20,0D6 61002 8 201006 61002 9 20,002 61001 10 20,p00 61000 11 20000 6,000 12 20,000 6,000 13 20,014 6,004 14 20,544 6,163 IS 20,409 6,123 16 20,267 5,080 17 20,042 6,013 18 2W%9. _ :, .6,17.1- 19 20,533 6,1S4 20 20,533 6,160 21 20,66S 6,200 25 20,075 6,023 26 20,054 6,016 27 2D,290 6,087 28 20,000 6,DW 29 20,000 6,000 30 20,000 61000 31 20,000 6,000 32 20,061 6,018 33 20,092 6,028 34 20,092 61029 35 20,058 6,017 36 20,000 6,000 37 20,OD0 6,000 38 20,265 61080 50 20,000 6,000 51 20,000 6,000 52 20,000 6,000 53 20,000 6,OOp 73 20,082 6,024 Ma Low Density Phase Summary PHASE 1 Pro)ect Area Data (ft') (Be Total Lot Area: 824,656 18.93 Total R/W Area: 266,990 6.13 Total 0pen Space Area: 731,816 16.80 Total Pro)ed Area: 1,823,462 41,96 Built -Upon Area Data (ft fad Lot Coverage: 247,391 5,69 Streets: 3,33 Parking Z 122 " " 0.16 Sidewalks:"'" 0.90 Other 0.04 otp urt pon rep: ,1 t - - Revr ision^ ursuant Phase 1 recorded peat i Revisions pursuantto finaldesign of Phase WATERLEIGH PHASES 1, 2 4 Allowable Built -Upon Area and Residential Subdivision Deed Restriction Calculations Lot No. Lot Area (W) Max. Allowable Built -Upon Area.(ft') 39 21,227 6,368 40 2!1,002 6,001 41 20,007 61002 42 20,005 6,D01 43 20,004 6,OD1 44 20,W6 6,002 45 20,002 6,OD1 46 20,008 6,002 47 20,259 6,081 48 20,OD1 6,000 49 20,097 6,026 54 20,000 6,D00 55 10,OW 61000 56 20,OD0 6,ODO 57 20,001 6OW 56 20,002 61001 59 20,008 6,002 60 20,003 61001 61 20.003 6,001 62 20,001 61000 63 20,759 6,228 64 20,752 226 65 20,007 6002 6G 20OW 6,000 67 20,000 6,000 68 20,000 -6,000 69 20,000 6,000 70 20,O00 G WO 71 201000 6,OW 72 22,584 6,775 136 20,453 6,136 137 20,000 61000 138 20 OW 6,000 139 20,O00 6,000 140 20,000 6,W0 141 20,000 6,000 142 20ODD 6,DW 143 20,000 6,000 144 20,202 6,061 145 20,OW 6,000 146 20,O00 6,000 147 20 WO 6,000 148 20,001 6,000 149 20 W2 6 WS ISO 20021 6,006 CIA 1 Low Density Phase summary PAM#2 . Pro Area Data (it) (ac) Total Lot Area: 906,417 Total R/W Area 1:14498 Total Open Spate Area. 20.81 3.25 15,96 Iota Pr 'act Area: 1,743,080 40.02 Bu6t•Upon Area Data ( ) (ac) Lot Coverage: Streets: Parking: Sidewalks: Other: 271,925 ; 90`, 0 0 6.24 2.09 0.00 0.76 0.00 I otal isulit-upoo Area: Revisions pursuant to final design of Phase WATERLUGH PHASES 1, 2 4 Allowable Built -Upon Area and Residential Subdivision Deed Restriction Calculations 22 20,408 3,5 Q, yy�gp 6,122 A 23 20,153 6,D46 24 20,088 6,026 75 20OW 61000 76 20000 6000 77 20OD0 60W 78. 20,003 6061 79 20,002 6W1 80 20002 6001 81 20 001 6,000 82 2Q000 61000 83 20,000 6OW 84 20 000 6,000 85 20,045 6,014 86 10,314 6,094 87 20,062 61019 88 20592 6178 89 21104 I 6,331 90 21,14$ 1 6,344 91 21,157 6,347 92 20,192 6058 93 291003 61001 94 20,001 61000 95 20,066 6,020 96 20168 6,050 97 20170 6,051 98 20,065 6,020 99 20009 6003 100 20,002 1 6,01)1 101 10,103 1 6,101 102 20,000 1 COW 103 20,006 1 6 002 104 20000 6,000 105 20;001 6,000 106 20,171 6 051 245 20,045 6.014 246 20335 6101 247 20,007 6,D02 248 20,007 6,002 249 20,007 6,002 250 20,007 1 6,002 251 20,007 1 6002 252 20,035 6,011 253 20,009 6 003 254 20,009 6,003 255 20,000 6,W3 256 20,005 6,002 257 20000 6000 a Low Oenatty , s y PrajectArea Data (ft (ac Total Lot Area: 966,419 22.19 Total R/W Area: 143,865 3.30 Total Open ce Area: 747,660 17.16 10tal Project Ares: 44 42.65 gul t-Upon Area Data (ft) (ac Lot Coverage: 289,926 6.66 Streets: 102,307 2.33 Parking: 0 0.00 Sidewalks: 35535 0.82 Other: 0 0.00 'rofai 9vni.UpnnWrr'er