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HomeMy WebLinkAboutSW7100113_CURRENT PERMIT_20210809STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW /a&A DOC TYPE CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATEQ��/ YYYYMMDD ROY COOPER Governor ELIZABETH S. BISER Secretary BRIAN WRENN Director NORTH CAROLINA Environmental Quality August 9, 2021 Albemarle Electric Membership Corporation Attn: Mr. Gary Ray PO Box 69 Hertford, NC 27944 Subject: Stormwater Permit No. SW7100113 Albemarle Electric Membership Corporation Winfall Facility Perquimans County Dear Mr. Ray: The Washington Regional Office received your request to renew the subject Stormwater Management Permit Application for Albemarle Electric Membership Corporation on July 19, 2021. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7100113, dated August 9, 2021, for the continued operation and maintenance of the project. This project is overall low density with two areas of higher density which are treated by a wet detention basin and a constructed wetland. This permit replaces the previous stormwater permit for this project and shall be effective from the date of issuance until August 9, 2029 and shall be subject to the conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611- 7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact this office at (252) 946-6481. Sincerely, Samir Dumpor, PE Regional. Engineer cc: WARO ec: Gary.RaV(@aemc.COm rl �', North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources Washington Regional Office 1 943 Washington Square Mall ! Washington, North Carolina Z788q ar Mp��mmlef Een,mmmlaILLWXY 252a46.6481 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY SUBDIVISION 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 Albemarle Electric Membership Corporation for Albemarle Electric Membership Corporation - Winfall at Hwy 17 Bypass & Creek Drive, Winfall, Perquimans County FOR THE construction, operation and maintenance of one wet detention pond and one constructed wetland in compliance with the provisions of Session Law 2008-211 and 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 and considered a part of this permit. This permit replaces the previous stormwater permit for this project and shall be effective from the date of issuance until August 9, 2021, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS 1. This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. The overall tract built -upon area percentage for the project must be maintained at 24% per the requirements of Session Law 2008-211 and Section .1005 of the stormwater rules. This project is permitted with three drainage areas and a maximum of 352,735 square feet of impervious area, of which only 40,793 square feet are not collected in one of the two engineered treatment systems. 3. Within the low density portions of the permitted project, the only runoff conveyance systems allowed will be vegetated conveyances such as swales with minimum side slopes of 3:1 (H:V) as defined in the stormwater rules and as shown on the approved plan. 4. The stormwater systems proposed to treat the runoff generated by the designated high density areas have been approved for the management of stormwater runoff as described on page 3 of this permit. 5. The runoff from all built -upon area within the permitted drainage area(s) of this project must be directed into the permitted stormwater control system(s) as shown on the approved plans. 6. If a lot or tract of land is subdivided out of the originally permitted 38.50-acre project area and whose ownership is not retained by the permittee, the new owner must submit a separate Offsite Stormwater Management Permit application package to the Division and receive a permit prior to any construction on the subdivided lot or tract of land. The built -upon areas associated with this project shall be located at least 50 feet landward of all perennial and intermittent surface waters. The following design elements have been permitted for this wet detention pond stormwater facility and must be provided in the system at all times. C. d. e. f. 9 h. i. j. k. I. M. n. o. P. Drainage Area, acres: Total Impervious Surfaces, ft2: Average Pond Design Depth, fe TSS removal efficiency: Design Storm, inches: Permanent Pool Elevation, FMS Permitted Surface Area, ft2: Permitted Storage Volume, ft3: Storage Elevation, FMSL: Controlling Orifice: Permanent Pool Volume, ft3: Forebay Volume, ft3: Maximum Fountain Horsepower: Receiving Stream / River Basin: Stream Index Number: Classification of Water Body: 11.96 296,257 et: 3.41 90% 1.50 L: 3.50 32,442 at permanent pool 79,512 at temporary pool 5.60 (2) 1.75"0 pipes 100,658 19,001 1/3 hp Perquimans River/Pasquotank 30-6-(3) "SC" The following design criteria have been provided in the constructed wetland system and must be maintained at design condition: Drainage Area, ft2: 26,926 Total Impervious Surfaces, ft2: 15,685 Design Storm, inches: 1.50 Permanent Pool (PP)Elevation, FMSL: 10.00 Shallow Water (PP) Surface Area, ft2: 1,475 Temporary Pool (TP) Elevation, FMSL: 11.00 Shallow Land (TP) Surface Area, ft2: 1,506 Required Storage Volume, ft2: 3,670 Permitted Storage Volume, ft3: 3,781 Controlling Orifice: 0.75"0 pipe Permitted Forebay Volume, ft3: 455 Receiving Stream/River Basin: Mill Creek/Pasquotank Stream Index Number: 30-6-5-(1) Classification of Water Body: "SC" II. SCHEDULE OF COMPLIANCE No homeowner/lot owner/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 or modification 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 project does not exceed the maximum allowed by this permit. 3. 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(s) shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 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 all or part of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval or a CAMA Major permit was sought. f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan. 6. The permittee shall submit for approval, final site layout and grading plans for any permitted future development areas shown on the approved plans, prior to construction. 7. 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. 8. 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. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 11. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater 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 re -vegetation of side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans. 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. 12. Records of maintenance activities must be kept by the permittee. The records will indicate the date, activity, name of person performing the work and what actions were taken. 13. The permittee shall submit to the Division an annual summary report of the maintenance and inspection records for each BMP. The report shall summarize the inspection dates, results of the inspections, and the maintenance work performed at each inspection. 14. This permit shall become void unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 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 contain all of the statements above, the signature of the Permittee, the deed book number and page, and the stamp/signature of the Register of Deeds. 16. Prior to transfer of the permit, the stormwater facilities will be inspected by Division staff. The facility must 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. 17. Decorative spray fountain(s) will be allowed in the wet detention basin treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. C. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for the fountain's pump is based on the permanent pool volume. The maximum pump power for a fountain in this pond is 1/3. 18. A decorative spray fountain shall not be allowed in the constructed wetland system. 19. If permeable pavement credit is desired, the permittee must submit a request to modify the permit to incorporate such language as required by the Division. The request to modify must include a soils report identifying the type of soil, the Seasonal High Water Table elevation and the infiltration rate. Upon the successful completion of a permit modification, the individual lot owners that request to utilize permeable pavements must submit the necessary forms and documentation to the permittee and receive approval prior to construction of the permeable pavement. 20- A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. III. GENERAL CONDITIONS 1. This permit is not transferable except after notice to and approval by the Director. In the event of a change of ownership, or a name change, the permittee must submit a completed Name/Ownership Change form signed by both parties to the Division 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 such time as the Division approves a request to transfer the permit. 3. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division 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) having jurisdiction. 11 3 0 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. The permittee grants Division Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 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. Unless specified elsewhere, permanent seeding requirements for the stormwater control must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 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 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 2008-211, Title 15A NCAC 21-1.1000, and NCGS 143-215.1 et.al. 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. 12. This permit shall be effective from the date of issuance until August 9, 2029. permit renewal shall be submitted 180 days prior to the expiration date of this be accompanied by the processing fee. Permit issued this the 91h day of August 2021. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION Division of Energy Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW7100113 Application for permit and must Date Received Fee Paid Permit Number � 1/1 11-I 1 IS'031. 00 00 NC DEQ Division of Energy, Mineral and Land Resources STATE STORMWATER: PERMIT RENEWAL APPLICATION FORM In accordance with 15A NCAC 2H.1045(3), the current permit holder shall renew their high density permit 180 days prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-396 (SB 781) Section 60. (c). This application form is for permit renewals only. A. PROJECT INFORMATION 1. State Stormwater Permit Number: SW7100113 2. Project name: Albemarle Electric Membership Corp - 3. Project street address: Creek Drive City: Winfall County: Perquimans ZIP 27909 4. What, if any, changes have been made to the project as permitted? No changes If the project has changed from the original approved plans, please complete SWU-101 for a Major Modification or Minor Modification Application form available at: https://deg.nc.goy/about/divisions/energy- minera I-land-resources/enercty-mine ra I -la nd-rules/stormwater-prop ram/post-construction. B. PERMITTEE INFORMATION If changes to the permittee or project name have been made, please complete either the Permit Update form or the Permit Transfer form available at: https://deg.nc.gov/about/divisions/energv-mineral-land- resources/energv-mineral-land-rules/stormwater-program/post-construction. State Stormwater Permits do not automatically transfer with the sale of the property. 1. 2. 3. 4. 5. 3 Current Permit Holder's Company Name/Organization: Albemarle Electric Membership Corporation Signing Official's Name: Gary Ray Signing Official's Title: Executive Vice President/General Manager Mailing Address: PO Box 69 City: Hertford State: NC ZIP Street Address: 125 Cooperative Way City: Hertford State: NC ZIP Phone: 252 426-5735 Email: Gary. Ray(Maemc.com 27944-0069 27944 Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018 C. SUBMITTAL REQUIREMENTS Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that include all required items listed below will be accepted and reviewed. Ipit" I each item below to indicate that the required information is provided in the application package: [ayl 1. A permit application processing fee of $505.00 payable to NCDEQ. 12�13 2. One original signed hard copy and one electronic copy of this completed form. The signing official named on this application to represent the current permittee must meet one of the following: a. Corporation — a principle executive officer of at least the level of vice-president; b. Limited Liability Company (LLC) — a manager or company official as those terms are defined in G.S. 57D "North Carolina Limited Liability Company Act;" c. Public Entity - a principal executive officer, ranking official, or other duly authorized employee; d. Partnership or limited partnership — the general partner; e. Sole proprietor; or f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the signature of another entity. 3. One hard copy and one electronic copy of recorded documents required by the original permit that have not yet been received by DEMLR, including: deed restrictions, protective covenants, condominium/planned community declaration and easements. If the project has been built, include documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If the project has not been built, include a signed agreement that the final recorded deed restrictions and protective covenants will be submitted at a later date. 4. O&M Agreements, Please select one: ® I have a copy of the current recorded O&M Agreement for all SCMs, and 1 will continue to keep this on file with the permit; or ❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am requesting a copy be sent to me. I agree to keep this on file with the permit. 5. Designer Certifications, Please select one: ❑ A copy of the certification(s) confirming that the project was built in accordance with the approved plans have been previously provided to the Division; or ® A copy of the certification(s) confirming that the project was built in accordance with the approved plans are enclosed; or ❑ The project has not yet been built. 6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a signed, sealed, and dated letter from a licensed professional stating that the SCMs have been inspected, and that they have been built and maintained in accordance with the permit. 7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC): Provide one hard copy and one electronic copy of documentation from the NC Secretary of State, or other official documentation, which supports the titles and positions held by the persons listed in Section C.2 per 15A NCAC 2H. 1043(3)(b). https://www.sosnc.qov/on line services/search/by title/ Business Registration Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018 4 D. PERMITTEE'S CERTIFICATION I, — l % , the person legally responsible for the permit, certify that I have a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am responsible for the performance of the maintenance procedures, and the site has been and will be maintained according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the project, SCMs, or ownership. All information provided on this permit renewal application is, to the best of my knowledge, c rTctt and c°�p\late. Signature: J �.I�I Date: 11 is 1 ZAU NOTARIZATION: I, M.hw, a Notary Public for the State of V-"As , C aYo\.na County of do hereby certify that C aZr�� W personally appeared before me this the day of execution of the forgoing instrument. Witness my hand and official seal, 20_2 % , and acknowledge the due (Notary Seal) ��.� �t%ER 4f Q Notary Signature: _tkA QU-n_ -Tn C'LALl n My commission expires —$.,%NA \q - 202>,� '. Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018 Booth & Associates Ju1v 7, 2021 VIA UPS Division of Encrgy, Mineral & Land Resources Slormwater Program Washington Regional Office 943 Washington Square Mall, Washington, NC 27889 Subject: Albemarle Electric Membership Corporation Permit Renewal SCM As -Built Certification To Whom It Mav Concern 1. Robert S. Young, Jr, P.E. (License No. 039995), contend that the permanent slonuwater wcl detention basin and constructed wetland built for Albemarle Electric Membership Corporation's office located on Creek Drivc in Winfill. NC were built and maintained in accordance with the NCDEQ-approved pennit plans and that the stonnwater treatment systems are fully functional. I attest to this based on an on -site inspection and survey data obtained by Mark E. Cullifer, P.L.S. (License No. L-4910) on June 24, 2021. If you have any questions, please call Briana Eddy at Booth & Associates, LLC at 919- 951-8770 est. 198 or email at b.cddvnbooth-assoc.com. Sincerely. BOOTH X ASSOCIATES, LLC RSY/jcs cc: Briana D. Eddy 21-10305-6001 Robot S. Young, Jr, P.E. 7/14/2021 5811 Glenwood Avenue 919.851.8770 office Raleigh, NC 27612 919.859.5918 facsimile www.booth-assoc.com Permit No. (to be pros d d by DWO) t:!b APR 2 1 2010 AN ' NCDENR o201F W ATF9OG h 7' � r o STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information. Project name Contact person Phone number Date Drainage area number I11 DESIGNI INFORMATION Site Characteristics Drainage area Impervious area, post -development % impervious Design rainfall depth Storage Volume: Non -SA Waters Minimum volume required Volume provided Storage Volume: SA Waters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr mnoff Minimum volume required Volume provided Peak Flow Calculations Is the pre/post control of the tyr 24hr storm peak flow required? 1-yr, 24-hr rainfall depth Rafional C, pre -development Rational C, post -development Rainfall intensity: 1-yr, 24-hr storm Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak flow Pre/Post 1-yr, 24-hr peak flow control Elevations Temporary pool elevation Permanent pool elevation SHWT elevation (approx. at the pen. pool elevation) Top of 1 Oft vegetated shelf elevation Bottom of 1Oft vegetated shelf elevation Sediment cleanout, top elevation (bottom of pond) Sediment cleanout, bottom elevation Sediment storage provided Is there additional volume stored above the stale -required temp. pool? Elevation of the top of the additional volume William W. Dreitzler. P.E. 26-Apr-10 1 I (- -- _521,132 if 296,257.'ft" 56.85 % 1.5'in 36,566',ft' 79,512 it' Y ,(Y or N) 3.1,in OK OK, volume provided is equal to or in excess of volume required. 0.301(unifless) 0.70, (unifiess) 0.13 inlhr OK 0.46 ft'isec 1.06 ft'Isec 0.62 ftsisac 5,60 fmsl 3.50 fmsl 3.50, fmsl 4.00; mist 3.00 fmsl -1.00 first 2.00; fmsl 1.00It - N'Y (Y or N) i 5.6'fmsl OK S u(- ./ �.rll Form SW401-Wet Detention Basin-Rev.8-9117109 Pans I. & II. Design Summary, Page 1 of Permit No. (fo bs provided by DWO) II. DESIGN INFORMATION Surface Areas Area, temporary pod 41,335. fe Area REQUIRED, permanent pool 29,705 fe SAIDA ratio 5.70,(unitess) Area PROVIDED, permanent pool, fb,,,, o„I 32,442ft2 OK Area, bottom of 10ft vegetated shelf, A.,,,,r 27,790It' Area, sediment cleanoul, top elevation (bottom of pond), Aw ,, 13,153'fts Volumes Volume, temporary pool 79,5lie OK Volume, permanent pool, Vr,,, ( 100,658,%s Volume, forebay (sum of forebays it more than one forebay) 19,001;itr Forebay %of permanent pool volume 18.9% % OK SAIDA Table Data Design TSS removal 90% Coastal SNDA Table Used? I Y I(Y or N) MountaindPledmonl SAIDA Table Used? I N I(Y or N) SAIDA rate 5.70 (unitess) Average depth (used in SAIDA table): Calculation option 1 used? (See Figure 10-2b) (Y or N) Volume, permanent pool, V,,,,y„ 100.658 fe Area provided, permanent pool, !y„,,,,_,,,I 32,442 fe Average depth calculated I Iit Need 3 If min. Average depth used in SAIDA, d„, (Round to nearest 0.5fl) ) I0 Calculation option 2 used? (See Figure 10-2b) 1 Y I(Y or N) Area provided, permanent pool, A,.. 32,442 IfT Area, bottom of 100 vegetated shelf, Am,." 27,790 fe Area, sediment deanout, top elevation (bottom of pond), An via 13,153 f? "Depth" (distance b'w bottom of 10ft shelf and top of sediment) 4.00 If Average depth calculated I 3,411 fl OK Average depth used in SAIDA, d,,, (Round to nearest 0.50) I 3.51t OK Drawdown Calculations Drawdown through onfice? Diameter of odfice (it circular) Area of orifice (if -non -circular) Coefficient of discharge (CD) Driving head (H,) Drawdown through weir? Weir type Coefficient of discharge IQ Length of weir (L) Driving head (H) Pre -development 1-yr, 24-hr peak flow Post -development 1-yr, 24-hr peak fax Storage volume discharge rate (through discharge odfice or weir) Storage volume drawdoxn time Additional Information Vegetated side slopes Vegetated shelf slope Vegetated shelf width Length of flowpath to width ratio Length to width ratio Trash rack for overflow, 8 office? Freeboard provided Vegetated filter provided? Recorded drainage easement provided? Copures all runoff at ultimate bui)dout? Drain mechanism for maintenance or emergencies is: Form SW401-Wet Detention Bas n,Rev.e-e/17/o9 I 1.08'ryslsec I 0.26,0sec 3.151days OK, draws down in 2-5 days. Parts I. a II. Design Summary, Patio 2 of 2 Permit (to be provided by D WQ) IIItREQUIRED;ITEMS"CHECK_LISTN Please indicate the page or plan sheet numbers where the supporting documentation can be found.An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below.lf a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. W69, C' r t 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Basin dimensions, - Pretreatment system, - High flow bypass system, - Maintenance access, - Proposed drainage easement and public right of way (ROM, - Overflow device, and - Boundaries of drainage easement. N 6 k C- II"(c 2. Partial plan (1" = 30' or larger) and details for the wet detention basin shovring - Outlet structure with trash rack or similar, - Maintenance access, - Permanent pool dimensions, - Forebay and main pond with hardened emergency spillway, - Basin cross-section, -Vegetation specification for planting shelf, and - Filter strip. p INS C U6 3. Section view of the wet detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. n C 1' S 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified on the plans prior to use as a wet detention basin. 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. tC 1•5 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. n N1" ATT. 7. The supporting calculations. ,v 5 �N A TT. 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. Ni 5k Ali TT. 9. A copy of the deed restrictions (if required). NS R P'r i 10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County soil maps are not an acceptable source of soils information. Form SW401-Wet Detention Basin-Rev.8-9/17/09 Part III. Required Items Checklist, Page 1 of 1 517 /oo 113 ATA NCDENR o201, W AT f,9 T r O -~c STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WETLAND SUPPLEMENT This form must be filled out, printed and submitted. The Required Items Checklist (Part 1/1) must be printed, filled out and submitted along with all the required information. Project name Contact name Phone number Date Drainage area number II. DESION11NFARMATION Site Characteristics Drainage area j 26,9x_66 It, Impervious area 15,685.00:ft2 Percent impervious 58.3%% dy — N pv� -�FIr� Design rainfall depth i 1.50 inch fl;, �.9vb Peak Flow Calculations 1-yr, 24-hr rainfall depth 1-yr. 24-hr intensity Pre -development 1-yr, 24-hr runoff Post -development 1-yr, 24-hr runoff Pre/Post 1-yr, 24-hr peak control Storage Volume: Non -SA Waters Minimum required volume Volume provided (temporary pool volume) Storage Volume: SA Waters Parameters 1.5' runoff volume Pre -development 1-yr, 24-hr runoff volume Post -development 1-yr, 24-hr runoff volume Minimum volume required Volume provided Outlet Design Depth of temporary pooliponding depth (DPI„ ) Drawdown time Diameter of orifice Coefficient of discharge (Co) used in orifice diameter calculation Driving head (Ho) used in the orifice diameter calculation f 3.12 — 7in 0.13 inlhr 0.02 ift'Isec 0.05 ft'/sec H3 ft'lsec 300.00 7ft, 3,781.00 ft' 1933.00 'ft' 1 350.00; fl' 4,020.06ft' 3670.00 ft' 3.781.00 ft' F_ 12.00 in 2.66 days 0.75 in I 0.60� (unitless) I 0.33 ft APR 2 7 2010 OK OK OK OK Drawdown orifice diameter may be insufficient. Please provide adequate supporting calculations. X2 Form SW401-Wetiand-Rev.6-11/16/09 Parts I and II. Project Design Summary, Page 1 of 3 Surface Areas of Wetland Zones Surface Area of Entire Welland F 3,7B1.00 flZ OK Shallow Land ! 1,506.00;flZ. OK The shallow land percentage is: 40% % Shallow Water 1 1,475.20 ftZ OK The shallow water percentage is: 39% % Deep Pool Forebay portion of deep pool (pretreatment) 455.30'ft2 OK The forebay surface area percentage is: 12% % Non-forebay portion of deep pool 344.50,ft2 OK The non-forebay deep pool surface area percentage is: 9% % Total of wetland zone areas 3,781.00 ftz OK Add or subtract the following area from the zones 0.00 ft Topographic Zone Elevations Temporary Pool Elevation (TPE) Shallow Land (top) 11.00,ft amsl Permanent Pool Elevation (PPE) Shallow Water/Deep Pool (top) 16.00 It amsl Shallow Water bottom 9.70 It amsl Most shallow point of deep pool's bottom 7.00 If amsl Deepest point of deep pool's bottom 7.00 It amsl Design must meet one of the following two options: This design meets Option #1, _ Top of PPE is within 6" of SHWT, If yes: y � (Y or N) SHWT (Seasonally High Water Table) 10.50 It amsl OK This design meets Option 12, (Y or N) Wetland has liner with permeability < 0,01 in/hr, If yes: Depth of topsoil above impermeable liner i ;in Topographic Zone Depths Temporary Pool Shallow Land 12.00 in OK Permanent Pool Shallow Water 3.60 in OK Deep Pool (shallowest) 36,00 in OK Deep Pool (deepest) 36.00 in OK Planting Plan Are cattails included in the planting plan? n (Y or N) OK Number of Plants recommended in Shallow Water Area: Herbaceous (4* cubic -inch container) 400 Number of Plants recommended in Shallow Land Area: Herbaceous (4' cubic -inch container), OR 400 Shrubs (1 gallon or larger), OR 64 Trees (3 gallon or larger) and Herbaceous (4+cubic-inch) 8 and 320 Number of Plants provided in Shallow Water Area: _ Herbaceous (4' cubic -inch container) ; _ _ 400 OK Number of Plants provided in Shallow Land Area: Herbaceous (4` cubic -inch container) F _ 320. More required if not planting shrubs or trees. Shrubs (1 gallon or larger) 0 More required if not planting herb. and/or trees. Trees (3 gallon or larger) and ! 8 OK Grass -like Herbaceous (4+cubic-inch) 320' OK Form SW401-Wetland-Rev.6-11/16/09 Parts I and 11. Project Design Summary, Page 2 of 3 Additional Information Can the design volume be contained? Does project drain to SA waters? If yes, What is the length of the vegetated filter? Are calculations for supporting the design volume provided in the application? Is BMP sized to handle all runoff from ultimate build -out? Is the BMP located in a recorded drainage easement with a recorded access easement to a public Right of Way (ROW)? The length to width ratio is: Approximate wetland length Approximate wetland width (--y �(YorN) I n I(YorN) ( Ift y I(YorN) I y II1(YorN) y I(YorN) 2.44 :1 66.00 ft 27.00 It Approximate surface area using length and width provided 1,782.00 it' Will the wetland be stabilized within 14 days of construction? y j (Y or N) OK Excess volume must pass through filter. OK OK OK OK This approx. surface area is within this number of square feet of the entire wetland surface area reported above: OK E C:,R I 72�73 � Y ._`O fir'«;a _G';.�• '"N/III 1{ •••- I� � �, IIV✓' l J q46. Form SW401-Wedand-Rev.6.11/16/09 Parts I and II. Project Design Summary, Pape 3 of Permit No. (to be provided by DWQ) IIINREQUIREDITEMSICHECKEIST}va"' Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Initials Page/ Plan Sheet No. MS r 1 1. Plans (1" - 50' or larger) of the entire site showing: - Design at ultimate build -out, - Off -site drainage (if applicable), - Delineated drainage basins (include Rational C coefficient per basin), - Wetland dimensions (and length to width ratio), - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Overflow device, and - Boundaries of drainage easement. 1�+ C- t (0 2. Plan details (1" = 50' or larger) for the wetland showing: - Wetland dimensions (and length to width ratio) - Pretreatment system, - Maintenance access, - Proposed drainage easement and public right of way (ROW), - Design at ultimate build -out, - Off -site drainage (if applicable), - Overflow device, and - Boundaries of drainage easement. C Mo 3. Section view of the wetland (1" = 20' or larger) showing: - Side slopes, 3:1 or lower - Wetland layers All wetlands: Shallow land depth, shallow water depth, deep pool depth Option 1, no clay liner: SLWT depth Option 2, clay liner: Depth of topsoil on top of liner, liner specifications NL'� C 1, to 4. A detailed planting plan (1" = 20' or larger) prepared by a qualified individual showing: - A variety of several suitable species (not including cattails), - Sizes, spacing and locations of plantings, - Total quantity of each type of plant specified, - A planting detail, - The source nursery for the plants, and - Fertilizer and watering requirements to establish vegetation. N SR C t• S 5. A construction sequence that shows how the wetland will be protected from sediment until the entire p drainage area is stabilized. N S `` 4TT_ 6. The supporting calculations (including drawdown calculations). S Q A �r.,�► . 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. �Q 4 1 I 8. A copy of the deed restrictions (if required). n! S Q M 9. A soils report that is based upon an actual field investigation and soil borings. County soil maps are not an acceptable source of soils information. SW401-Wetland-Rev.6-11/16/09 Part III, page 1 of 1 Permit Number: 4j / / D O( f 3 (to be provided by DWQ) Drainage Area Number: (_ Wet Detention Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. JAN 2 8 �010 This system (check one): ❑ does ® does not incorporate a vegetated filter at the outlet. This system (check one): ❑ does ® does not incorporate pretreatment other than a forebay. Important maintenance procedures: — Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). — No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. — Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. — If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. — Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element Potentialproblem: How I will remediate theproblem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the wet Areas of bare soil and/or Regrade the soil if necessary to detention basin erosive gullies have formed, remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one-time fertilizer application, Vegetation is too short or too Maintain vegetation at a height of long. approximately six inches. Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The inlet device: pipe or The pipe is clogged. Unclog the pipe. Dispose of the swale sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to swale. smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. The forebay Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design depth for possible. Remove the sediment and sediment storage, dispose of it in a location where it will not cause impacts to streams or the BMP. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional show that pruning is needed practices to maintain optimal plant health. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The main treatment area Sediment has accumulated to Search for the source of the a depth greater than the sediment and remedy the problem if original design sediment possible. Remove the sediment and storage depth. dispose of it in a location where it will not cause impacts to streams or the BMP. Algal growth covers over Consult a professional to remove 50% of the area. and control the algal gr owth. Cattails, phragmites or other Remove the plants by wiping them invasive plants cover 50% of with pesticide (do not spray). the basin surface. Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4 Permit Number: (to be provided by DWQ) Drainage Area Number: BMP element: Potentialproblem: How I will remediate theproblem: The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and beaver activity is present. consult a professional to remove beavers. A tree has started to grow on Consult a dam safety specialist to the embankment. remove the tree. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged I Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Division of damage have occurred at the Water Quality Regional Office, or outlet. the 401 Oversight Unit at 919-733- 1786. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. When the permanent pool depth reads 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. BASIN DIAGRAM (fill in the blanks) Sediment Removal E' . -1 ON Bottom Elevatio_2 = ]/-ft Min. \\ / Sediment Storage Permanent Pool Elevation 3.5 Sediment Removal Elevation _1 ,}Noll Bottom Elevation -2 I1-ft Storage FOREBAY MAIN POND Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4 Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Albemarle Electric Membership Comoration BMP drainage area Print name: Bradley V. Furr Title: Executive Vice President and General Manager Address: 159 Creek Drive, Hertford, NC 27944 Date: /6V -�y-O y 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, ,66-"-2-prn le , a Notary Public for the State of wJ(4 f\ Cel_6(l m�_ , County of do hereby certify that personally appeared before me this 1/ day of 'GP C��( , and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, C �s Zee Jd A(-'-071� SEAL My commission expires // - /12-/ Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 FEB 1 2010 Permit Number: _5'W710b113 (to be provided by UWQ) Drainage Area Number: 09, Stormwater Wetland Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — Immediately following construction of the stormwater wetland, bi-weekly inspections will be conducted and wetland plants will be watered bi-weekly until vegetation becomes established (commonly six weeks). — No portion of the stormwater wetland will be fertilized after the first initial fertilization that is required to establish the wetland plants. — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wetland. — Once a year, a dam safety expert should inspect the embankment. After the stormwater wetland is established, I will inspect it monthly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. I • . ,:, ; : Potentialproblem:" How I will remediate the , noble" '+'fi",i),i'>n' Entire BMP Trash/debris is present. Remove the trash/debris. Perimeter of wetland Areas of bare soil and/or erosive Regrade the soil if necessary to remove the gullies have formed. gully, and then plant a ground cover and ' water until it is established. Provide lime and a one-time fertilizer application. Vegetation is too short or too long. Maintain vegetation at an appropriate height. Inlet device: pipe or swale The pipe is clogged (if applicable). Unclog the pipe. Dispose of the sediment offsite. The pipe is cracked or otherwise Replace the pipe. damaged if applicable) . Erosion is occurring in the swale (if Regrade the swale if necessary to smooth applicable). it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Form SW401-Welland O&M-Rev.4 Page 1 of 3 !4BMP;element:'i%' `' Potentialproblem: ` Forebay Sediment has accumulated in the forebay to a depth that inhibits the forebay from functioning well. Deep pool, shallow water and shallow land areas Embankment Micropool Receiving water has occurred. are present. Algal growth covers over 50% of the deep pool and shallow water areas. Cattails, phragmites or other invasive plants cover 50 % of the deep pool and shallow water areas. Shallow land remains Flooded more than 5 days after a storm event. Plants are dead, diseased or dying Best professional practices show that pruning is needed to maintain optimal plant health. Sediment has accumulated and reduced the depth to 75% of the original design depth of the deep pools. A tree has started to grow on the embankment. An annual inspection by appropriate professional shows that the embankment needs repair. Evidence of muskrat or beaver activity is present. Sediment has accumulated and reduced the depth to 75 % of the original design depth. Clogging has occurred. The outlet device is damaged Erosion or other signs of damage occurred at the outlet. Permit Number: (lobe provided by DWQ) How Iwill remediate the prolilein. �,+',".:?•!i' Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion Remove the weeds, preferably by hand. I a pesticide is used, wipe it on the plants rather than spraying. Consult a professional to remove and control the algal growth. Remove invasives by physical removal or by wiping them with pesticide (do not sorav) - consult a Drofessional. device immediately. Determine the source of the problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the around cover if necessarv. Prune according to best professional practices. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Consult a dam safety specialist to remove the tree. needed repairs. a professional to remove or beavers. Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Clean out the outlet device. Dispose of the sediment off -site. Kepair or replace the outlet device. Contact the NC Division of Water ( 401 Oversight Unit at 919-733-1786. Form SW401-Wetland O&M-Rev.4 Page 2 of 3 Permit Number: (ro be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: Albemarle Electric Membership Corporation BMP drainage area number: Print name: Bradley V. Farr Title: Executive Vice President and General Manager Address:__ 159 Creek Drive, Hertford, NC 27944 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, �s��u�� \��, a Notary Public for the State of NotA-Vv hu-M, c\�, County of 1K-IccL Fvt c-\c,-�� , do hereby certify that aJr-c.cAT ��C personally appeared before me this 91 day of coo t), and acknowledge the due execution of the forgoing stormwater wetland maintenance requirements. Witness my hand and official seal, SEAL My commission expires 11 %<:2 Form SW401-Wetland O&M-Rev.4 Page 3 of 3 Deed Restrictions & Protective Convenances JAN 2 8 2010 I, Bradley V. Furr acknowledge, affirm and agree by my signature below, that I will cause the following deed restrictions and covenants to be recorded prior to the sale of any lot within the project known as Albemarle Electric Membership Corporation The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW710 0 113 as issued by the Division of Water Quality under the Stormwater Management Regulations. 2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the stormwater management permit. 3. These covenants are to run with the land and be binding on all persons and parties claiming under them. 4. 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. 5. Alteration of the drainage as shown on the approved plan may not take place without the concurrence of the Division of Water Quality. 6. A stormwater management system must be designed and permitted through DWQ before construction of any future development. 7. The owner of each lot, whose ownership is not retained by the permittee, is required to submit a separate stormwater permit application to the Division of Water Quality and receive a permit prior to construction. 8. The project and each lot will maintain a 30'" foot wide vegetated buffer between all impervious areas and surface waters. "50 foot for projects located in the 20 coastal counties. a Notary Public in the State of c_ County of do hereby certify that ('a(AA'k � \1 \I o' C personally appeared before me this the I t`_ day of 20 GPI , and acknowledge the due execution of the foregoing instrument. Witness my hand and official seal, SEAT_ _.• SignatLTre My Commission expires Page 1 of 1