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HomeMy WebLinkAboutSW7081206_CURRENT PERMIT_20090218STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. I SW DOC TYPE CURRENT PERMIT APPROVED PLANS ❑ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE9jy��� YYYYMMDD MCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary February 18, 2009 Albemarle Electric Membership Corporation Attn: Mr. Bradley V. Furr PO Box 69 Hertford, NC 27944 Subject: Stormwater Permit No. SW7081206 South Mills Substation High Density Stormwater Project Camden County Dear Mr. Furr: The Washington Regional Office received a Stormwater Management Permit Application for the subject project, located on December 16, 2008. 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. SW7081206 dated February 18, 2009, for the subject project. FZ f 301-24 This permit shall be effective from the date of issuance until February 18, 2019, 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 and in the submitted application. 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 150E 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. North Carolina Division of Water Quality Internal: www.ncwatergualitv.ore 943 Washington Square Mall Phone: 252-946-6481 Washington, NC 27889 FAX 252-946-9215 An Equal Opportunity/Affirmative Action Employer — 50 % Recycled110 % Post Consumer Paper NorthCarohna Naturally Page 2 of 9 Albemarle Electric Membership Corp February 18, 2009 Page Two If you have any questions, or need additional information concerning this matter, please contact either Bill Moore, or me at (252) 946-6481. nicer ly 4 AI Hodge V/- Regional Supervisor Surface Water Protection Section cc: Booth & Associates, Inc. Camden County Building Inspections Washington Regional Office Central Files Page 3 of 9 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Albemarle Electric Membership Corporation South Mills Substation Project Camden County FOR THE construction, operation and maintenance of a wet detention basin in compliance with the provisions of 15A NCAC 2H A000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until February 18, 2019, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.6 on page 3 of this permit. The stormwater controls have been designed to handle the runoff from 1.4 acres of impervious area. 3. 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 and permit. 4. The tract will be limited to the amount of built -upon area indicated on page 4 of this permit, and per approved plans. Page 4 of 9 L The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the permitted stormwater control system. The following design criteria have been provided in the wet detention basin and must be maintained at design condition: a. Drainage Area: b. Total Impervious Surfaces: C. Design Storm: d. Pond Depth: e. TSS removal efficiency: f. Permanent Pool Elevation, FMSL: g. Permanent Pool Surface Area Required: h. Permanent Pool Surface Area Provided: i. Permanent Storage Volume Required j. Permanent Storage Volume Provided k. Temporary Storage Elevation, FMSL: I. Small Diameter Controlling Orifice: M. Receiving Stream/River Basin: n. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 3.24 acres 1.4 acres 1.5 - inch 3.0 ft 85 % 9.0 ft 3057 sf 9104 sf 4654 cf 11,138 cf 10.0 ft 1.5 - inch pipe UT -Dismal Swamp Canal C, sw 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. 3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plans 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 slopes and the vegetated filter. d. Immediate repair of eroded areas. Page 5 of 9 e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of bypass structure, filter media, flow spreader, catch basins, piping and vegetated filter. g. A clear access path to the bypass structure must be available at all times. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ. The records will indicate the date, activity, name of person performing the work and what actions were taken. 5. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 6. Upon completion of construction, 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. A modification may be required for those deviations. 7. 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. 8. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 9. 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 item shown on the approved plans, including the stormwater management measures, built -upon area, details, etc. b. Project name change. G. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, lease 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. Page 6 of 9 10. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 11. • A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 12. 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. 13. This permit shall be effective from the date of issuance until February 18, 2019. Application for permit renewal shall be submitted 180 days prior to the expiration date of this permit and must be accompanied by the processing fee. III. GENERAL CONDITIONS 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 formal permit transfer request to the Division of Water Quality, accompanied by a completed name/ownership change form, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. 2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 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. 4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. 5. The permittee grants DENR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and reissuance or termination does not stay any permit condition. Page 7 of 9 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. 8. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the project. 9. The permittee shall notify the Division of any name, ownership or mailing address changes within 30 days. Permit issued this the 18 th day of February, 2009. IT COMMISSION for Division of Water Quality By Authority of the Environmental Management Commission Permit Number SW7081206 Page 8 of 9 Stormwater Permit No. SW7081206 Wet Pond System South Mills Substation South Mills, NC Designer's Certification I, as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction project, (Project) of the 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. Note: The checklist on the following page must be included with this Certification. Any changes or deviations from the approved plans and specifications must be explained in detail, and may require a permit modification. The certification forms should be submitted to the Division of Water Quality at the appropriate Regional office. SEAL Signature Registration Number Date Page 9 of 9 Complete this checklist for each system and include with Certification: 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure elevations are per the approved plan. 6. The bypass structure is located per the approved plans. 7. A Trash Rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. W� . - ._ - DWQ USE ONLY Date Received Fee Paid Permit Number DEC 1 b Zuud r` .5-,0!5� SW 769l�n� State of North Carolina S WACK lall 7/O S Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form may be photocopied for use as an original GENERAL INFORMATION 1., Applicants name (specify the name of the corporation, individual, etc. who owns the project): ALBEMARLE ELECTRIC MEMBERSHIP CORPORATION 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): 11 MR. BRADLEY V. FURR 3. Mailing Address for person listed in item 2 above: City: HERTFORD State: NC Zip: 27944 Phone: ( 252 ) 426-5735 Fax ( 252 ) 426-8270 Email:brad.furr@albemarle.ncemcs.com 4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): SOUTH MILLS 115 TO 15 X 25 kV SUBSTATION 5. Location of Project (street address): N.C. HIGHWAY 343 City: SOUTH MILLS County: CAMDEN Zip: 27976 6. Directions to project (from nearest major intersection): The entrance to the site is along N.C. Highway 343 approximately Y4 mile south of the intersection of U.S. Highway 17 and N.C. Highway 343. 7. Latitude: 36' 27' 54" N Longitude: 76' 20' 06" W of project 8. Contact person who can answer questions about the project: Name: BRYAN D. MANESS, P.E. Telephone Number: ( 919 ) 851-8770 Email: ManessBD®Booth-Assoc.com II. PERMIT INFORMATION: Form SWU-101 Version09.25.08 Page Iof4 1. Specify whether project is (check one): NNew ❑Renewal ❑Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): []Low Density ❑High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑LAMA Major ❑Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Industrial Stormwater 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. THE STORMWATER WILL BE COLLECTED IN GRASS -LINED CHANNELS AND ROUTED INTO A WET DETENTION BASIN. REFERENCE THE STORMWATER MANAGEMENT PLAN FOR A DETALED NARRATIVE. 2. Stormwater runoff from this project drains to the PASQUOTANK River basin. 3. Total Property Area: 3.24 acres 4. Total Coastal Wetlands Area: 0 acres 5. Total Property Area (3) - Total Coastal Wetlands Area (4) = Total Project Area'*: 3.24 acres 6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): 43 % 7. How many drainage areas does the project have? 1 (All three (3) drainage areas shown on Drawing DA2 of 2 drain to the same stormwater device.) 8. Complete the following information for each drainage area:. It 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. For high density projects, complete the table with one drainage area for each engineered stormwater device. Basin Information ': Drainage Area 1- : , ' : Diauiage'Area 2 Receiving Stream Name DISMAL SWAMP CANAL Stream Class & Index No. C;Sw Total Drainage Area (so 85,378 On -site Drainage Area (sf) 85,378 Off -site Drainage Area (sf) 0 Existing Impervious' Area (so 0 Proposed Impervious'Area (so 60,549 % Impervious" Area (total) 43 ..... . Im envious. Surface Area Drainage Area 1 '- Dramage"Area 2 On -site Buildings (so 384 On -site Streets (sf) N/A On -site Parking (so N/A On -site Sidewalks (so N/A Other on -site (so 60,165 (GRAVEL AND CONCRETE FOUNDATIONS Off -site (so N/A Form SWU-101 Version 09.25.08 Page 2 of 4 Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas, sidewalks, gravel areas, etc. "*Total project area shall be calculated to exclude Coastal Wetlands from use when calculating the built upon area percentage calculation. This is the area used to calculate overall percent project built upon area (BUA). 9.. How was the off -site impervious area listed above derived?_ N/A Projects in Union County: Contact the DWQ Central Office staff to check to see ifyou project is located within a Threatened & Endangered Species watershed that may be subject to more stringent stormwater requirements. IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following property 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. Forms can be downloaded from hiip:/fh2o.enr.state.nc.us/sulbmp forms htm - deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded property restrictions and protective covenants for this project shall include all the applicable items required in the above form, 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 NC DWQ 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 Permitting Unit at (919) 807-6300 for the status and availability of these forms. Forms can be downloaded from http://h2o.enr.state.nc.us/su/bmp forms.htm. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Form SW401-Permeable Pavement Form SW401-Cistern Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Permeable Pavement Supplement Cistern Supplement Form SWU-101 Version 09.25.08 Page 3 of 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 Office. (Appropriate office may be found by locating project on the interactive online map at hM2://h2o.enr.state.nc.us/su/msi maos htm) 1. Please indicate that you have provided the following required information by initialing in the space provided next to each item. Initials • Original and one copy of the Stormwater Management Permit Application Form ` bm • Original and one copy of the Deed Restrictions & Protective Covenants Form (if WA / 8 hm required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP Tbm • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) payable to NCDENR 'Q Q M • Calculations & detailed narrative description of st�gQrtpwater treatment/management B h M • Copy of any applicable soils report (To 8e 'Pr#v JeeOnce i6rim s Ar- Carty( 6d) RAM • Two copies of plans and specifications (sealed, signed & dated), including: R 1) M - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VII. AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf (such as additional information requests), please complete this section. (ex, designing engineer or firm) Designated agent (individual or firm): BOOTH & ASSOCIATES, INC./BRYAN D. MANESS, P.E. Mailing Address: 1101 SCHAUB DRIVE City: RALEIGH State: NC Zip: 27606 Phone: ( 919 1 851-8770 Fax: ( 919 1 859-5918 Email: ManessBD®Booth-Assoc.com VIII. APPLICANT'S CERTIFICATION I, (print or type name of person listed in General Information, item 2) MR. BRADLEY V. FURR 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. Form SWU-101 Version 09.25.08 Page 4 of 4 STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM WET DETENTION BASIN SUPPLEMENT This form must be filled out, printed and submitted. ?quired Items Checklist (Part III) must be printed, filled out and submitted along with all of the required inforr I. PROJECT INFORMATION Project name Albemarle EMC - South Mills Substation Contact person Bryan D. Maness, PE Phone number (919) 851.8770 Date 11/2612008 Drainage area number 1, 2 and 3 IL DESIGN INFORMATION Site Characteristics Drainage area 1.96 ft2 Impervious area 1.39 ft2 % impervious 43 % Design rainfall depth 1.50 in Storage Volume: Non -SR Waters Minimum volume required 4,654 ft3 Volume provided 11,138 ft3 Storage Volume: SR Waters 1-yr, 24-hr runoff depth N/A in Pre -development 1-yr, 24-hr runoff N/A ft3 Post -development 1-yr, 24-hr runoff N/A ft3 Minimum volume required N/A ft3 Volume provided N/A ft3 Peak Flow Calculations 1-yr, 24-hr rainfall depth 2.75 in Rational C, pre -development 0.15 (unitless) Rational C, post -development 0.80 (unitless) Rainfall intensity: 1-yr, 24-hr storm 0.30 in/hr Pre -development 1-yr, 24-hr peak flow 1.86 ft3/sec Post -development 1-yr, 24-hr peak flow 0.00 ft3/sec Pre/Post 1-yr, 24-hr peak flow control -1.86 ft3/sec DEC 16 2008 Basin Elevations Basin bottom elevation 6.00 ft Sediment cleanout elevation 6.50 ft Bottom of shelf elevation 8.00 ft Permanent pool elevation 9.00 ft SHWT elevation 9.00 ft Top of shelf elevation 9.50 ft Temporary pool elevation 10.00 ft Volume and Surface Area Calculations SA/DA ratio 3.58 (unitless) Surface area at the bottom of shelf 3,485 ft2 Volume at the bottom of shelf 5,682 ft3 Permanent pool, surface area required 3,057 It Permanent pool, surface area provided 9,104 It Permanent pool volume 11,976 ft3 Average depth for SA/DA tables 3.00 ft Surface area at the top of shelf 9,759 It Volume at the top of shelf 16,692 ft3 Forebay volume 2408 ft3 Forebay % of permanent pool volume 20 % Temporary pool, surface area provided 13171 ft2 Drawdown Calculations Treatment volume drawdown time 3.86 days Treatment volume discharge rate 0.04 ft3/s Pre -development 1-yr, 24-hrdischarge 1.86 ft3/s Post -development 1-yr, 24-hr discharge 0.00 ft3/s Additional Information Diameter of orifice 1.5 in Design TSS removal 85 % Basin side slopes 3.00 :1 Vegetated shelf slope 6.5 to 20 :1 Vegetated shelf width 23.25 ft Length of flowpath to width ratio 2.50 :1 Length to width ratio 2.50 :1 Trash rack for overflow & orifice? Y (Y or N) Freeboard provided 1.00 ft Vegetated filter provided? Y (Y or N) Recorded drainage easement provided? N (Y or N) Capures all runoff at ultimate build -out? Y (Y or N) Drain mechanism for maintenance or Gravity Drain Not Possible; Use A Pump emergencies III. REQUIRED ITEMS CHECKLIST 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. Pagel Plan Initials Sheet No. (jpM SM1 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 (ROW), - Overflow device, and - Boundaries of drainage easement. RDri GR2 2. Partial plan (V = 30' or larger) and details for the wet detention basin showing: - 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. �M N/A 3. Section view of the dry detention basin (1" = 20' or larger) showing: - Side slopes, 3:1 or lower, - Pretreatment and treatment areas, and - Inlet and outlet structures. �M GRt 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. D� Calculations 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay, to verify volume provided. 6 QM GR1 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the entire drainage area is stabilized. Q Book 7. The supporting calculations. [3 D M Enclosed 8. A copy of the signed and notarized operation and maintenance (O&M) agreement. D M N/A 9. A copy of the deed restrictions (if required). To Be 10, A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County Provided soil maps are not an acceptable source of soils information. Ned Borimp copylCLei G' w /.ZJkJ-PPr SvU^ldS DEC 17 2008 06-6483-80OV447- Albemarle Electric Membership Corporation - South Mills Substation FINANCIAL RESPONSIBILITY/OWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT No person may initiate any land -disturbing activity on one or more acres as covered by the Act before this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, N.C. Department of Environment and Natural Resources. (Please type or print and, if the question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.) Part A. 1. Project Name Albemarle Electric Membership Corporation - South Mills 115 to 15 x 25 kV Substation 2. Location of land -disturbing activity: County Camden City or Township _ South Mills Highway/Street NC Highway 343 Latitude 360 27' 54" N Longitude 760 20' 06" N 3. Approximate date land -disturbing activity will commence: 2009 4. Purpose of development (residential, commercial, industrial, institutional, etc.): Electrical Substation 5. Total acreage disturbed or uncovered (including off -site. borrow and waste areas): 2.62 6. Amount of fee enclosed: $ 195.00 . The application fee of $65.00 per acre (rounded up to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $585). 7. Has an erosion and sediment control plan been filed? Yes No Enclosed X 8. Person to contact should erosion and sediment control issues arise during land -disturbing activity: Name Bryan D. Maness, PE E-mail Address ManessBD(a)boolh-assoc.com Telephone (919)851-8770 Cell# (919)880-9779 Fax # (919)859-5918 9. Landowner(s) of Record (attach accompanied page to list additional owners): Albemarle Electric Membership Corporation (252) 426-5735 (252) 426-8270 Name , Telephone Fax Number Post Office Box 69 Current Mailing Address Hertford NC 27944 City State Zip 159 Creek Drive Current Street Address Hertford NC 27944 City State Zip 10. Deed Book No. 103 Page No. 785 Provide a copy of the most current deed. Part B. 1. Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a comprehensive list of all responsible parties on an attached sheet): Albemarle Electric Membership Corporation Name Post Office Box 69 Current Mailing Address Hertford NC 27944 City State Zip Telephone (252)426-5735 brad. fu rr(a)albe made. ncemcs.com E-mail Address 159 Creek Drive Current Street Address Hertford NC 27944 City State Zip Fax Number (252)426-8270 06-6483-80031447 - Albemarle Hectric Membership Corporation - South Mills Substation 2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address of the designated North Carolina Agent: Not Aoolicable Name Mailing Address City State Zip Telephone Address Current Street Address City Slate Zip Fax (b) If the Financially Responsible Party is a Partnership or other person engaging in business under an assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible Party is a Corporation, give name and street address of the Registered Agent: Not Applicable Name of Registered Agent Current Mailing Address City Slate E-mail Address Current Street Address City State Zip Fax The above information is true and correct to the best of my knowledge and belief and was provided by me under oath (This form must be signed by the Financially Responsible Person if an individual or his attorney -in -fact, or if not an individual, by an officer, director, partner, or registered agent with the authority to execute instruments for the Financially Responsible Person). I agree to provide corrected information should there be any change in the information provided herein. Bradley V. Furr Executive VP & General Manager Type or print ame Title or Authority �a-g-d� Signature Date cu i'%tP> a Notary Public of the County of _ o State of North Carolina, hereby certify that ra 4Jl'0' f appeared personally before me this day and being duly sworn acknowledged that the above form was executed by him. Witness my hand and notarial seal, this day of 3f -c- 20 Notary O / 4Z My commission expires / /- /x- // =�._ 1 CONSULTING ENGINEEFS engineering for the future since 1960 December 12, 2008 Mr. Lyn Hardison North Carolina Department of Environment & Natural Resources Water Quality Division 943 Washington Square Mall Washington, North Carolina 27889 Subject: Albemarle Electric Membership Corporation Hertford, North Carolina South Mills Substation Stormwater Management Plan Dear Mr. Hardison: 1Y T:IiI��:7LlT.ZII Il `► I I] ra Xx4 >' r3 DEC 16 2008 Enclosed for standard review is a copy of the Stormwater Management Plan for the subject project. Also enclosed is an additional set of drawings, a check to cover the review fee, a Stormwater Management Permit Application form, a Wet Detention Basin Operation and Maintenance Agreement, and a Wet Detention Basin Supplement form. For your reference, an Erosion & Sediment Control plan has been submitted to the Land Quality Division. If you should have any questions, please call our office. bdm/kpp cc: Mr. Gary W. Ray, PE Mr. David S. Huffstetler Enclosures 06-6483-SC06/447 Sincerely, BOOTH & ASSOCIATES, INC. Bryan D. Maness, PE 1011 Schaub Drive 919.851.8770 office Raleigh, NC 27606 919.859.5918 facsimile w .booth-assoc.com Permit Number: (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. This system (check one): ® does ❑ does not incorporate a vegetated filter at the outlet. DEC 16 ZOOS This system (check one): ❑ does ® does not incorporate pretreatment other than a forebayD01'r k 'NA i f) 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. 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. I 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 swale The pipe is clogged. Unclog the pipe. Dispose of the 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 growth. 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 99:5 feet in the main pond, the sediment shall be removed. When the permanent pool depth reads 9.5 feet in the forebay, the sediment shall be removed. BASIN DIAGRAM ill in the blanks) Sediment Removal a. 6_5' 1 Pefin ent Pool Elevatio Form SW401-Wet Detention Basin O&M-Rev.4 -------------- - Volume Botft t om Permanent Pool Elevation 9' - Sediment Removal Elevation 6_5' Volume - Min. Sediment Bottom Elevation 6' 1-ft n Storage FOREBAY Sedmmer Storage MAIN POND 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 D WQ of any problems with the system or prior to any changes to the system or responsible party. Project name:Albemarle Electric Membership Corooration - South Mills 115 to 15 x 25 kV Substation BMP drainage area number: 1 (Includes DA-1, DA-2 and DA-3 from Dwg DA2 of 2 Print name: Mr. Bradley V. Furr Title: Executive VP and General Manager Address: P.O. Box 69, 159 Creek Drive, Hertford NC 27944 Note: The legally responsible parry should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. a Notary Public for the State of Noel CO-a2lt,ze , County of �r2 _ � U/t� , do hereby certify that Q/ad/?_y V F-(_c // personally appeared before me this day of :Dec: Do and acknowledge the due execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal, UeL�C�fi SEAL My commission expires // f /a - // Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4 .-.l. � ,at M N . ........ % . A AT 0Q a a u