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HomeMy WebLinkAboutSW8050611_HISTORICAL FILE_20060327STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE o7G�.7'd53 0%� YYYYMMDD State Stormwater Management Systems Permit No. SW8 050611 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 1S HEREBY GRANTED TO Leon Johnson Country Boy Riders Motorcycle Club NCSR 1207 (Halfway School Branch Road), Ivanhoe, Pender County FOR THE construction, operation and maintenance of a wet detention pond in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. This permit shall be effective from the date of issuance until March 27, 2016, 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. 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 control has been designed to handle the runoff from 35,250 square feet of impervious area and must be operated with a 30' vegetated filter.. 3. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans. This permit does not provide for the construction of any future built -upon area. 4. 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. 5. The runoff from all built -upon area within the permitted drainage area of this project must be directed into the permitted stormwater control system. Page 2 of 7 State Stormwater Management Systems Permit No. SW8 050611 X The following design criteria have been provided in the wet detention pond and must be maintained at design condition: a. Drainage Area, acres: Onsite, ft : Offsite, ft2: b. Total Impervious Surfaces, ft2: C. Design Storm, inches: d. Pond Depth, feet: e. TSS removal efficiency: f. Permanent Pool Elevation, FMSL g. Permanent Pool Surface Area, ft2 h. Permitted Storage Volume, ft3: Temporary Storage Elevation, FMSL j. Controlling Orifice: k. Permitted Forebay Volume, ft3: I. Receiving Stream/River Basin- M. Stream Index Number: n. Classification of Water Body: II. SCHEDULE OF COMPLIANCE 3.82 166,399 0 35,250 1 3.0 85% (requires a 30' vegetated filter) 45.0 3,560 3,924 49.0 3 pipes @0.5" 0 each 1,640 White Oak Branch 1 Cape Fear CPF20 18-68-18-5 "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 Plan must be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited to: a. Semiannual scheduled inspections (every 6 months). b. Sediment removal. C. Mowing and revegetation of slopes and the vegetated filter. d. Immediate repair of eroded areas. e. Maintenance of all slopes in accordance with approved plans and specifications. f. Debris removal and unclogging of outlet structure, orifice device, flow spreader, catch basins and piping. g. Access to the outlet structure must be available at all times. Page 3 of 7 State Stormwater Management Systems Permit No. SW8 050611 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. Decorative spray fountains will be allowed in the stormwater 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 a fountain in this pond is 116 horsepower. 6. 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. 7. 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. 8. 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. 9. Access to the stormwater facilities shall be maintained via appropriate easements at all times. 10. 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. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition, 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. 11. The permittee shall submit final site layout and grading plans for any permitted future areas shown on the approved plans, prior to construction. 12. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten years from the date of the completion of construction. Page 4 of 7 State Stormwater Management Systems Permit No. SW8 050611 13. 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. Ill. 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. 3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) 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. 7. 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. 9. The permittee shall notify the Division any name, ownership or mailing address changes within 30 days. Permit issued this the 27th day of March 2006. NORT AROLINA ENVIRONMENTAL_ MANAGEMENT COMMISSION "( 13� for Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Page 5 of 7 WALToN ENGMERI11lCT Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC, 28405 Re: Country Boy Dear Linda, January 13, 2006 00� RECEIVED JAN 1 3 2006 BY: Attached are two copies of the revised plan. A vegetated filter detail has been added. If you have any questions or need additional information, please contact me Sincerely, R. Mark Walton NC Professional Engineer Registration No. 16879 Cover letter rev plan vcg filter.doc TO: 910-2594800 PO Box 895, Burgaw, North Carolina, 28425 Fax: 910-259-1779 SW8 050611 Country Boy Riders N Subject: SW8 050611 Country Boy Riders From: Linda Lewis <linda.lewis@ncmail.net> Date: Fri, 06 Jan 2006 15:51:11 -0500 To: Mark Walton <walton8@b e I I south. net> Mark: I spoke too soon regarding the issuance of this permit. The plans do not contain the vegetated filter detail. The forebay and pond section detail references a vegetated filter detail, but there isn't one on the plans. Please add this detail to the plans, and submit 2 copies of the revised plans. Linda of 1 1/6/2006 3:51 PM Country Boy Riders Motorcycle Club Subject: Country Boy Riders Motorcycle Club From: Linda Lewis <linda.lewis@ncrnail.net> Date: Fri, 06 Jan 2006 15:41:41 -0500 To: Mark Walton <walton8@bell south.net> Mark: I've corrected a few things on the supplement that you need to be aware of. The first is the Basin Bottom Elevation, which you reported as 1705. 1 think you mistakenly thought this as asking for an area, when in fact it asks for the elevation, which is 45.0. Please confirm. Second, page 3 was left totally blank- I have completed the sediment removal depths and the other information. Please note that for a 3' deep pond, the sediment removal elevation equals the bottom elevation, because the pond can never be less than 3' deep. Essentially, there is no sediment build-up allowed in a 3' deep pond. Upon your confirmation accepting the above changes, I can write this permit. Linda 1 of 1 1/6/2006 3:51 PM WALToNEN§INEERLNG November 1, 2005 Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Stormwater Permit Application No. SW8 050611, Country Boy Riders Motorcycle Club Dear Linda, Enclosed are two copies of a revised stormwater plan for the referenced project and a completed wet detention supplement form. The revised plan includes, as requested, a new vicinity map that shows a major intersection (HWY 53 and 421). The vegetated shelf is shown extended all the way around the pond. Also 3 wetland plants are specified by name on the pond section detail. Please replace the previously submitted plans and calculations with those enclosed. Sincerely, Allen Thornton Walton Engineering "V 0 ' 9005 Tel: 910-2594800 PO Box 895, 13urgaw, North Carolina, 28425 lax: 910-259-1779 Re: SW8 050611 Country Boy Riders Subject: Re: SW8 050611 Country Boy Riders From: "Mark Walton" <walton8@bellsouth.net> Date: Mon, 31 Oct 2005 13:06:20 -0800 To: "Linda Lewis" <linda.lewis@ncmail.net> Linda, I was out of town most of last week at a conference. I will get this info hand delivered to you tomorrow. Thanks, Mark ----- Original Message ----- From: "Linda Lewis" <linda.lewis@ncmail.net> To: "Mark Walton" <walton8@bellsouth.net> Sent: Tuesday, October 25, 2005 11:04 AM Subject: SW8 050611 Country Boy Riders Mark: I received the updated stormwater wet pond calculations for the project on September 21, 2005. Please provide the following to continue the review: 1. I can't find a completed wet detention supplement form in the file or in your submittal package. Gary's 8/5/2005 request for additional information did not specifically request one, but we assumed that since the project had been determined to be a pocket of high density, and a wet pond was being designed, that you would know that a supplement was necessary as well. I have attached a PDF version of the supplement to this email for your convenience. Please complete it and have Mr. Johnson sign, date and notarize it, and send it back to me. 2. Please update the vicinity map to show the nearest intersection of two major roads. A 4 digit NCSR is not considered a major road. 3. The vegetated shelf is supposed to extend all the way around the pond. The section detail appears to point at the area in front of the forebay wall alone as the place for the wetlands plants to be planted. The shelf and the plantings continue on around the main pond. 4. Please specify by name the wetlands plants for the vegetated shelf on the pond section detail. Thanks, Linda 1 of 1 10/31/2005 5:29 PM SW8 050611 Country Boy Riders Subject: SW8 050611 Country Boy Riders From: Linda Lewis <linda.lewis@ncniail.net> Date: Tue, 25 Oct 2005 15:04:06 -0400 To: Mark Walton <walton8@bellsouth.net> Mark: I received the updated stormwater wet pond calculations for the project on September 21, 2005. Please provide the following to continue the review: 1. 1 can't find a completed wet detention supplement form in the file or in your submittal package. Gary's 8/5/2005 request for additional information did not specifically request one, but we assumed that since the project had been determined to be a pocket of high density, and a wet pond was being designed, that you would know that a supplement was necessary as well. I have attached a PDF version of the supplement to this email for your convenience. Please complete it and have Mr. Johnson sign, date and notarize it, and send it back to me. 2. Please update the vicinity map to show the nearest .intersection of two major roads. A 4 digit NCSR is not considered a major road. 3. The vegetated shelf is supposed to extend all the way around the pond. The section detail appears to point at the area in front of the forebay wall alone as the place for the wetlands plants to be planted. The shelf and the plantings continue on around the main pond. 4. Please specify by name the wetlands plants for the vegetated shelf on the pond section detail. Thanks, Linda .. ..m Content -Type: application/pdf SWU102 Wet Pond.pdf Content -Encoding: base64 1 of 1 10/25/2005 3:45 PM WALToNENaiNEERm September 16, 2005 Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 SEP 2 1 2005 Re: Stormwater Permit Application No. SW8 050611, Country Boy Riders Motorcycle Club Dear Linda, Enclosed are two copies of a revised stormwater plan and calculations for the referenced project. The only thing that has changed since the recent previous submittal of additional information is the volume used to calculate the hole sizes for the riser in the wet pond. The revised calculations use the temporary pool volume for a 1" rainfall whereas the actual temporary pool volume provided was used in the previous calculations. Accordingly, the plan was revised to reflect the revised calculations. The number of riser holes changed from 6 holes to 3 holes. Also, please notice, the calculations use the average head for orifice sizing. The maximum head is divided in half as shown in the equations to give the average head. I Please replace the previously submitted plans and calculations with those enclosed. Sincerely, 1'�%J A.�' Mark Walton Walton Engineering Tel: 910-2594800 110 Box 895,13urgaw, North Carolina, 28425 Fax: 910-259-1779 WALTON ENGINEERIN August 25, 2005 Ms. Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Re- Stormwater Permit Application No. SW8 O50611, Country Boy Riders Motorcycle Club Dear Ms. Lewis, Enclosed is the revised Stormwater plan and calculations providing the additional information per your request. Sincerely, Jason L. Williams Walton Engineering SEP 0 2 'tG05 Tel: 910-2594800 PO Box 995, Burgaw, North Carolina, 28425 Fax: 910-259-1779 1]19 T i � F♦5 11 1133 1324 O dV/ b '0 I 173] / rti 1313 - 121l 1y 1717 ! 1]09 7.Y r t]I! 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G Z N R _ S Cj _ __ _ _ _.._ ___.-. �k/o) IUS U.J/p Ia7J r\L IVIU VHL Project Name::Country Boy 30 FOOT VEGETATED FILTER REQUIRED Calculated By:'Mark Walton =� Date: 8/102005 DEPTH ft 3.0 1 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 IMP% Drainage Area, DA = 3.82 acres 10 0.9 0.8 0.7 0.6 0.5 0.0 0.0 0.0 0.0 0.0 Impervious Area, Ai = 0.809 acres 20 1.7 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 Percent Impervious, I = 21.2 % 30 2.5 2.2 1,9 1.8 1.6 1.5j.1.3 1 1.2 1.0 1 0.9 Depth, Hpp = 3.0 ft 40 3A 3.0 2.6 2.4 2.1 1.9 1.6 1.4 1.1 1.0 50 4.2 3.7 3.3 3.0 2.7 2.4 2.1 1.8 1.5 1.3 Interpolation Values 60 I 5.0 1 4.5 1 3.8 I 3.5 32 1 2.9 1 2.6 1 2.3 1 2.0 1 1.8 IMP% SAIDA 70 6.0 5.2 4.5 4.1 3.7 3.3 2.9 2.5 2.1 1.8 Lower Value Higherr Value 20 1.7 80 6.8 6.0 1 5.2 1 4.714.2 3.7 1 3.2 2.7 2.2 j 2,0 30 2.5 90 7.5 6.5 5.8 5.3 1 4.8 4.3 3.8 ! 3.3 2.8 1 1.3 Interpolated SAIDA = 0.018 Min. Required Surface Area at Permanent Pool, App = 2,986 Design Storm, Sd = 1,0 Rv = .05 + .009(1) = 0.24 TP Volume Required, Vtp = Sd x (1/12) x DA x Rv x 43,560 = 3,336 Surface Area Provided @ PP, App = 31560 Elev. @ PP, ELpp = 48.00 Let Min. Temp. Pool Depth Required, Htp Min. = Vtp/App = 0.94 TP Depth Selected, Htp = 1.60 Elev. @ TP, ELtp = Elpp + Htp = 49.00 Surface Area Provided @ TP, Atp = 4,288 TP Volume Provided, Vtp = [(Atp + App)21 x Htp = 3,924 TP Volume Provided > Required? Yes Surface Area @ PP Provided > Required? Yes Area at Bottom of PP, Afl = 1,705 PP Volume Provided, Vpp = Hpp x (Afl + App)/2 = 7,898 Forebay Volume Required, Vfb W. = Vpp x 0.2 = 1,580 Forebay Depth, Hfb = 10 Forebay Bottom Area, Afbfl = 179 Forebay Surface Area, Afb = 915 Forebay Volume Provided, Vfb = Hfb " (Afbfl + Afb)2 = 1,640 Forebay Volume Provided > Required? Yes Orifice Sizing 2 Day Drawdown = Vtpl(2 x 86,400) = 3 Day Drawdown = Vtp/(3 x 86,400) = 4 Day Drawdown = Vtp/(4 x 86,400) = 5 Day Drawdown = Vtp/(5 x 86.400) = l 1UU 1 8.2 1 1.4 1 6,8 I U,2 I b.b I 5.0 1 4.4 1 3.13 I 3.2 1 2.6 1 (linear interpolation) Note: The values in this chart are non -linear. = SAIDA * DA' 43560, s.f. Use linear interpolation only on adjacent values. Inches CT s.f. (determined by 2D CAD Analysis) feet feet feet feet s.f. (determined by 2D CAD Analysis) c.f. If "No", increase volume provided. If "No", increase area provided. s.f. (determined by 2D CAD Analysis) c.f. CT feet s.f. (determined by 20 CAD Analysis) s.f. (determined by 2D CAD Analysis) c. f. If "No", increase volume provided. Flowrate 0.02 cTs. 0.02 c.f.s. 0.01 c.f.s. 0.01 c.f.s. I hereby certify that I personally developed this spreadsheet and programmed the equations (as shown) into the spreadsheet. I also certify that the calculations hereon were performed by me or under my direct supervision. 1�`oi. • � �Lw :3 p C RISER & BARREL DESIGN Project:! Country Boy Outlet/ID: 1 Date: i 9/16/2005 Designed By: Mark Walton Step1: Determine peak flow, 1 " (or 1.5') storm flow, controlling elevations, etc. per Section 8.07 of the Sedimentat and Erosion Control Manual and/or Stormwater Best Management Practices, as applicable. Note: Use maximum design flow for riser, barrel, and emergency spillway sizing, but use volume to be drained and temporary pool depth to determine head for hole sizing. (1) BARREL DESIGN: Governing Function: Qp = a(2gH)"01(1+ Km + KpQ` = max discharge from pipe, cfs Rearranging Yields: a = 0(1+ Km + KpQ"/(2gWU.b Also: a= (R14)d` Substituting and Reducing Yields: d = [0(1+ Km + KpQu" 1(ad4)(2gH)"°]" Hcr iElev. 0 Max. pischcrge Permanent --Pool --'— Riser Height = Hr where: Qp = 4.08 = max. discharge from pipe, cfs g = 32.2 = acceleration of gravity, ft/sec"2 H = 1.2 = elevation head differential, ft Km = 1 = coefficient/sum of minor losses, usually 1 Concrete Kp = 0.013 = pipe friction coefficient Antif lotation L = 43 = pipe length, ft Block Lc = We WC — Riser Ucimeter = Dr -----——— — — — — —— Hh --— --sz —— — — I — —— H do = [0(1+ Km + KpL)Ub/(a/4)(%H)"']"' = 11.7 = calculated minimum pipe diameter, inches M ANTIFLOTATION BLOCK DESIGN: d = 12 = specified pipe diameter, inches Notes: Use square block, with variable height. 2 RISER DESIGN: Ignore pipe weight (conservative.) Step 1: Determine riser size from Figure 8.07b of Erosion Conrol Handbook Block Buoyancy, Bb = Wc`Hcpw jaw = 62.4 Iblc.f (NOT Table 8.07b) Block Weight, Wb = Wc`Hcpc pc = 140 lb/c.f. Choose riser diameter first (from "Inlet Proportions chart" firstRECEIVED Riser Buoyancy, Br=(7J4)Dr`Hrpw head from Pipe Flow vs Head chart. Bb + Br >/= Wb Wc`Hcrw + (z/4)Dr2Hrpw = Wc`Hcpc Riser Diameter, Dr = 24 inches - SEP 2 1 ZQ05 Rearranging and Reducing Yields: We = 0.795Dr(Hr/Hc)" Height at Riser Crest, He = 0.55 ft Hr= 4 ft Set He = 2 ft PRO, # cc = 0.795Dr(Hr1Hc)05 = 2.249 calculated minimum block width, ft We = 4.5 specified block width, ft where: V = 3,336 = volume of water to be drained (temporary pool volume), W Hh = 1.DO = maximum head of water above dewatering hole(s), ft Hh/2 0.50 = average head of water above dewatering hole(s), ft !hereby certify that I personally developed this spreadsheet and Td = 2.5 = detention time to dewater basin, days programmed the equations (as shown) into the spreadsheet. I also r Cd = 0.60 =coefficient of contraction for the orifice (approximately 0.6) certify that the calculations hereon wa,g.performed by me or un �- .- •, Q = V/(86,400Td) = 0.015 = total orifice flow rate (one hole), ft'/sec my direct supervision. Ao = Q/ Cd 2 Hh/2 "' -ft' [ (g( )) ] - 0.0041 =orifice area (one hole), - `� Ao;n = Ao'144 = 0.596 =orifice area (one hale), in d0 = (Aa, 1,/(w/4))0.5. 0.871 = calculated orifice diameter (one hole), in Q ' N = 3 = number of dewatering holes t \ ;IV Arc = (Q/N)1[Cd(2g(Hh/2))05] = 0.0015 =calculated area of each of N dewatering holes, ft2 16879 d;c = [(A,,"144)/(x14)]° 5 = 0.527 = calculated diameter of each of N dewatering holes, ine�`f s5' t�G1 dN = 0.50 = specified diameter for each of N holes (must be < or = d,�) CHECK: Q. _ [(,r14)dN21144]CN[2g(h/2)j0 s = 0.0139 W/sec T = V/(86,40DQ,) = 2,77 days Country Boy Riders Motorcycle Club Subject: Country Boy Riders Motorcycle Club From: "Mark Walton" <walton8@bellsouth.net> Date: Thu, 4 Aug 2005 10:46:24 -0700 To: <gary.beecher a ncmai1.net> Dear Mr. Beecher, I received your Request for Additional Information dated August 2, 2005 today regarding Stormwater Project No. SW8 050611. A previous Request for Additional Information from the Division of Water Quality asked us to revise the plans to provide a 30 foot vegetative buffer around the impervious portion of the project and to provide a depressed grass median in the parking lot interior to address the pocket of high density. We did both of these things, so I don't understand why additional measures are being requested. I have spoken with Mr. Leon Johnson, President of Country Boy Riders Motorcycle Club, and we request to meet with you on -site as early as possible. The best day for us would be as early as possible Monday morning, August 8, 2005. Please let me know if this meeting time is acceptable or what times you can meet with us. Also, the "pocket of high density" determination is something I have only seen being applied in the last couple of years. I understand the concept, but I don't know how to determine if a project has a pocket of high density. Can you tell me where to find the rules, guidelines, definitions, or policies regarding pockets of high density? Sincerely, Mark Walton 1 of 1 8/5/2005 8:12 AM North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Alan W. Klimek, P.E., Director August 2, 2005 Mr. Leon Johnson, President Country Boy Riders Motorcycle Club Post Office Box 574 Atkinson, NC 28421 Subject Dear Mr. Johnson: Request for Additional Information Stormwater Proj ect No.S W 8 050611 Country Boy Riders Motorcycle Club Pender County The Wilmington Regional Office received a Stormwater Management Permit Application for Country Boy Riders Motorcycle Club site on June 7, 2005. A preliminary review of that information has determined that the application is not complete. The following information is needed to continue the stormwater review: 1. It tip ears that even with the new median this site is still a pocket of high density. An ideal low density site would have the storniwaterfront the parking lotflowing across the softball field. The only alternative far this site may be to go high density and add either a pond or all infiltration basin. Please note that this request for additional information is in response to a preliminary review. The requested information should be received by this Office prior to September 1, 2005 or the application will be returned as incomplete. The return of a project will necessitate re -submittal of all required items, including the application fee. If you need additional time to submit the information, please mail or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7215. Sincerely, Gary eecher Environmental Technician EB/ghb: S:1WQSlSTORMWATIADDINF0120051050611.Aug05 CC: Allen Thornton (Walton Engineering) Wilmington Regional Office One 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 NorthCarolina Phone: 910-395-39001 FAX: 910-350-20041 Internet: h2o.enr,state.nc.us An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper Naturally ` - V WA L TDN EN INEERIN Ms. Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 June 07, 2005 N�(j v Re: Stormwater Permit Application, Country Boy Riders Motorcycle Club Dear Ms. Lewis, Enclosed is the revised Sedimentation and Erosion Control Plan for Country Boy Riders Motorcycle Club. The following additions/changes have been made to the plan: 1. There will be no significant changes in the existing topography of the proposed site. Grading will only be necessary in the area of the building and parking lot. The location of the parking lot and building have been moved in order to accommodate a 30' wide vegetative buffer along the property lines. 2. In order to avoid "pockets of high density" a 15' grass median was added to the parking lot. I also added a cross section detail of this median. 3. The vicinity map has been changed in order to make it more readable. Other additions include topography lines, and other added notes regarding the topography. Please contact me if you have any questions. SSiin�ccee1rely,,5h,,7�- Allen -C �IVLD JUN U 7 2005 BY:5W g 05 0611 Tel: 910-2594800 PO Box 995,13urgaw, North Carolina, 29425 Fax: 910-259-1779 Country Roy Riders Motorcycle Club 1' Subject: Country Boy Riders Motorcycle Club From: Linda Lewis <Linda.Lewis@ncmail.net> Date: Wed, 26 Jan 2005 16:34:14 -0500 To: Mark Walton <wa1ton8@bel1south.net> January 25, 2005 Greg Finch Walton Engineering PO Box 895 Burgaw, NC 28425 RE: Country Boy Riders Motorcycle Club Pender County State Stormwater Permit Application Dear Greg: The stormwater application was received on January 25, 2005. Unfortunately, it cannot be accepted as submitted due to the following deficiencies: 1. Please show the existing and proposed grading. Avoid creating discharge "points". (See comment 42 below) Please utilize sheet flow only with minimum 30, wide grassed buffers located on the property. Buffers located on adjacent properties cannot be included since the permittee has no control over the development of that property and cannot guarantee that the buffer will be maintained in perpetuity. 2. This is a pocket of high density because all of the built -upon area is clustered to one side. An engineered stormwater facility is..required if the pocket of density cannot'be alleviated via appropriate grading, use of 30' wide grassed buffers, and other passive control measures. A n example of a passive control measure for this site includes a 15, wide depressed grassed median in the parking lot to store and infiltrate runoff. 3. The vicinity map is unreadable. Please enlarge the map or enlarge the printing to make it readable. The application cannot be accepted until these items are addressed. If you have any questions, you can either call me at (910) 395-3900 or email me at linda.lewis@ncmail.net. Sincerely, Linda Lewis Environmental Engineer Division of water Quality Surface Wafer Protection Section O 1 of 1 1 /1)CIO )f 41'14 PAA Read: Country Boy Riders Motorcycle Club N Subject: Read: Country Boy Riders Motorcycle Club From: "Mark Walton" <walton8@bellsouth.net> Date: Wed, 26 Jan 2005 16:59:45 -0500 To: "Linda Lewis" <Linda. Lewis@ncmai l.net> This is a receipt for the mail you sent to "Mark Walton" <walton8@bell south.net> at 1/26/2005 4:34 PM This receipt verifies that the message has been displayed on the recipient s computer at 1/26/2005 4:59 PM Final -Recipient: rfc822;Linda.Lewis@ncmail.net Original -Message - ID: <4IF80CD6.6030303@ncmail.net> Disposition: manual-action/MDN-sent-manually; displa Part I.',II message/disposition-notification 11 Content -Encoding: 7bit 1 of 1 1/26/2005 5:44 PM YVALTON ENGINEERING January 20, 2005 Ms. Linda Lewis NC DENR Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Stormwater Permit Application, Country Boy Riders Motorcycle Club Dear Ms, Lewis, Enclosed is the Sedimentation and Erosion Control Plan for Country Boy Riders Motorcycle Club. This letter serves as the narrative description for the project for both the Sedimentation and Erosion Control Plan and the Stormwater Management Permit Application. The application is for a low -density residential development (with no curb or gutter), draining to Class C NSW waters. The land disturbing activity to be undertaken includes construction of a gravel road and parking area, a softball field, a 5000 square foot building, and some grading. Stormwater runoff will drain into the existing ditches and surrounding area by sheet flow. Construction of the roadway will proceed as follows. First the right-of-ways will be cleared of vegetation. A temporary construction entrance will be installed at the beginning of the road. The road will be constructed. The unpaved area of the right-of-way will be seeded with grass according to the specifications included with the application. The grassed areas will be allowed sufficient time to fully develop. Once the grass in the right-of-way has been planted, it will be maintained by Country Boy Riders Motorcycle Club. Silt fencing will be used in areas, if deemed necessary, however it is not anticipated. Routine inspections and maintenance will be performed to ensure that the erosion control measures are in good condition and operating properly. Repairs will be made immediately to any erosion control measures found to be insufficient. RECEIVED JAN 2 5 2005 Sincerely, BY: /3 Gregory S. Finch Tel: 910-259-4800 PO Box 895,13urgaw, North Carolina, 28425 Fax: 910-259-1779 SIVMT-I rr5XJ M017Vfl L17t,8Z ON `aoyuenI gnko alofojo;oIN sjapi j Aogtijunoo ew U014B30-1 04i5 (aiydeibodo_L) sauaS a;nuiw S'L ON 'A�uno:) Japuad afteipono uosw�Id sesn jo uoilonpoad@U a�n6i� 6-1 ------------- Property Area: 3.82 acres Disturbed Area: 3.82 acres Figure; I Project Country Boy Riders TMe: 3 Motorcycle Club ��T Disturbed Area Map YV ALTON ENGENL'ERINO Date: 1119105 Scale: NTS Drawn by: GSF I Project #: 200333