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HomeMy WebLinkAboutSW7050633_HISTORICAL FILE_20050829STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW DOC TYPE El CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE DOC DATE YYYYMMDD DETENTION POND ANALYSIS FILE NAME- C-\STORMWATERXPOND1SW7050633 PROJECT* SW7 050633 REVIEWER: A Franklin PROJECT NAME- Evangelical Methodist Church DATE: 29-Aug-05 Receiving Stream: Little River Class- C SW Drainage Basin: Index No. Site Area 21.27 acres Drainage Area 4400 'j]square feet Area = 5.62 acres IMPERVIOUS AREAS Building Parking Sidewalks TOTAL SURFACE AREA CALCULATION % IMPERVIOUS 55-61% Des. Depth 5 TSS: 90 Rational C square feet 34974.00 square feet 1.00 96004.00 square feet 0.95 5169.00 square feet 0,95 square feet square feet 569'4.7-1.7'Rsquare feet ,.. T. Rational Cc= 0.62 SA/DA Ratio 3.95% Req. SA 9668 sf Prov. SA F,: --1: -2-881 sf VOLUME CALCULATION * place a "l " in the box if Rational is used Rational ?* Des. StorM .......... inches Rv= 0.55 Bottom 1 rnsl Perm. PoolrMOa msI Design Pool 6.99 msl Design SA 14872 sf Req. Volume 13 cf Prov. Volume cf ORIFICE CALCULATION Avg. Head = Flow Q2, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = 0.46 ft 0,065 cfs 0.026 cfs weir H x W days. FOREBAY Perm. Pool Volume= Req. Forebay Volume= Provided Volume= Percent= SA @ Elevation= Q2 Area = Q5 Area = Orifice Area Q= COMMENTS Surface Area , Volume and Orifice are within Design Guidelines Ft 26396 5279.2 5862.00 2.87 sq. in. 1.15 sq. in. 2.41 sq. in. 0.054 cfs. x F77 r, PERMANENT POOL DETENTION PONDS Hyman & Robey, PC DESIGN OF POND RECEIVED 150-A Hwy 158 East Camden, NC 27921 Evangelical Methodist Church AUG O 8 2005 (252}-335-1888 10 Yr, 24 Hr Storm 08/03/05 DETENTION POND DWQ-W n R® Page 1 SAIDA PERCENTAGES FOR 90% TSS REMOVAL WITHOUT VEGETATIVE FILTER %IMPRV 3,0FT 3.5 FT 4.0 FT 4.5 FT 5.0 FT 5.5FT 6.0 FT 6.5FT 7.0 FT 10% 1.3 1.0 0.8 0.7 0.6 0.5 0A 0.3 0.2 20 % 2.4 2.0 1.8 1.7 1.5 1.4 1,2 1.0 0.9 30 % 3.5 3.0 2.7 2.5 2.2 1.9 1.6 1.3 1.1 40 % 4.5 4.0 3.5 3.1 2.8 2.5 2.1 1.8 1.4 50 % 5.6 5.0 4.3 3.9 3.5 3.1 2.7 2.3 1,9 60 % 7.0 6.0 5.3 4.8 4.3 3.9 3.4 2.9 2.4 70 % 8.1 7.0 6.0 5.5 5.0 4.5 3.9 3A 2.9 80% 9.4 8.0 7.0 6.4 5.7 5.2 4.6 4.0 3.4 90 % 10.7 9.0 7.9 7.2 6.5 5.9 5.2 4,6 3.9 100 % 12.0 10.0 8.8 8.1 7.3 6.6 5.8 5.1 4.3 WATERSHED AREA: 5.62 ACRES WATERSHED % IMPERVIOUS: 55 % PERMANENT POOL ELEVATION: 6 FT DESIGN PERMANENT POOL DEPTH: 5 FT SAIDA PERCENTAGE FACTOR: 3.9 %(FROMABOVETAHLE -TAKENFROMDESIGNOFSTORMWATER POND SURFACE AREA REQ'D: FOREBAY AREA: AT WIDTH = 0,33 LENGTH, WIDTH = 56.4136 LF LENGTH 169.241 LF Use these dimensions: WIDTH LENGTH VOLUME OF I" RAINFALL AREA OF ROOFS: 0.8 AC AREA OF PARKING/CONCRETE: 2.31 AC AREA OF GREEN AREAS: 2.5 AC VOLUME OF RUNOFF 12719.5 CF STORAGE DEPTH FOR MINIMUM AREA = ELEVATION OF I" RAINFALL = 6.99 CONTROL FACILITIES WORKSHOP MANUAL • PENC 1988) 9547 SF 2864 SF (BASED UPON MINIMUM SURFACE AREA) 43 LF 299 LF Normal Pool Elevation 0 VOL (CF) = [(ROOF* 1.0)+(PARKING*.95)+(GRASS*0.2) ]'43,560112 0.99 FT L^ B55p - Cl1 RnB �0-\ DRAWDOWN - WATER QUALITY Q(2 DAYS) = 0.07361 CFS Q(5 DAYS) = 0.02944 CFS 1" RUNOFF STAGE 0.99 FT DEPTH OF DRAWDOWN DEVICE BELOW OUTLET 1.5 FT 1" RUNOFF OUTLET DEVICE: 1.67023 INCH DIA HOLE DIAMETER OF HOLE TO USE: 1,75 INCH DIAMETER 1" STORM RUNOFF DRAWDOWN TIME 2.60261 DAYS INFLOW HYDROGRAPH A =iQ/(Cd*SQRT(2gh))] * 144 Rad. = SQRT(A/PI) Dia. =2*Rad. Return Year Storm 10 Yr Qp = Peak Discharge = 23 cfs Tc = Time of Concentration = 15 min Calculation of Tp (Time to Peak) From SCS NEH 4 , page 15-7 Eqn. 15.4 Lag Time (L) = (1"0.8*(S+ l)"0.7)/(1900*YA0.5) for L in Hrs where: 1 = hydraulic length of watershed (ft) S = (1000/CN)-10 CN = approximately same CN from TR-55 Y = avg. watershed land slope in % S = (1000/CN)-10 = 1,76471 L= 0.35689 hrs From SCS NEH 4 , page 16-7 Eqn. 16.7 Tp=D/2+L where : D = unit of excess duration rainfall (hrs) L = Lag Time (hrs) From SCS NEH 4 , page 16-8 Eqn. 16.12 D = 0.133 tc where: Tc = Time of Concentration (hrs) - (See Tr-55 Printout) THEREFORE: D = 0.03325 hrs Tp = 0.37352 hrs = 22.411 min Volume under Hydrograph = 1.39 * Qp * Tp = 42988.7 Cubic Feet 910 1.76471 85 0.49 Inflow Hydrograph SCS Dimensionless Hydrograph Time Discharge Time Discharge Volume Ratio Ratio hr cfs cf 0.00 0.00 0.00 0 0.10 0.03 0.04 1 93 0.20 0.10 0.07 2 309 0.30 0.19 0.11 4 588 0.40 0.31 0.15 7 959 0.50 0.47 0.19 11 1454 0.60 0.66 0.22 15 2041 0.70 0.82 0.26 19 2536 0.80 0.93 0.30 21 2876 0.90 0.99 0.34 23 3062 1.00 1.00 0.37 23 3093 1.10 0.99 0.41 23 3062 1.20 0,93 0.45 21 2876 1.30 0.86 0.49 20 2660 1.40 0.78 0.52 18 2412 1.50 0,68 0.56 16 2103 1.60 0.56 0.60 13 1732 1.70 0.46 0.63 11 1423 1.80 0.39 0.67 9 1206 1.90 0.33 0.71 8 1021 2.00 0.28 0.75 6 866 2.20 0.21 0.82 5 1280 2.40 0.15 0.90 3 909 2.60 0.11 0.97 2 662 2.80 0.08 1.05 2 476 3.00 0.06 1.12 1 340 3.20 0.04 1.20 1 247 3.40 0.03 1.27 1 179 .3.60 0.02 1.34 0 130 3.80 0.02 1.42 0 93 4.00 0.01 1.49 0 68 4.50 0.01 1.68 0 77 5.00 0.00 1.87 0 0 Volume under hydrograph = 40833 cf Based upon runoff volume = 42988.7 cf Depth reg'd for minimum area = 3.3436 ceSFA f 1855a %�4* C. R46E� ,y/o/11111 i i tiMOO STAGE STORAGE FUNCTION OF POND (FOR RECTANGULER DETENTION POND ONLY) Minimum surface area taken at normal water level BASIN AREA INCR ACCUM VOLUME VOLUME STAGE In s S Z sf cf cf ft Pond Side Slope (M) = In Z Z est Elevation 12857 0 0 0 Surface area at normal pool 6 13892 6687 6687 0.5 8.81 -0.69 0.54 6.5 14945 7209 13897 1 9.54 0.00 1.03 7 16016 7740 21637 1.5 998 0.41 1.51 7.5 17105 8280 29917 2 10.31 0.69 2.00 8 18212 8829 38746 2.5 10.56 0.92 2,50 8.5 19337 9387 48134 3 10.78 1.10 3.02 9 20480 9954 58088 3.5 10.97 1.25 3.55 9.5 21641 10530 68618 4 11.14 1.39 4.11 10 22820 11115 79733 4.5 11.29 1.50 4.68 10.5 24017 11709 91443 5 11.42 1.61 5.27 11 Regression Output: Constant 9,34346 Ks = SIZ"b = 13481.67 Std Err of Y Est 0.00969 R Squared 0.99962 No. of Observations 7 Degrees of Freedom 5 X Coefficient(s) 1.15215 = b Std Err of Coef. 0,01009 FOR VERTICAL SIDED DETENTION POND SET b=0. AND Ks = SURFACE AREA (SF) STAGE DISCHARGE (FOR RISER/BARRELL SPILLWAY W EMERGENCY WEIR) RISER Dr - 18 Riser Dia. (in) Etop - 20.00 Elev, Top Riser (ft) Cwr = 3.33 Riser weir coeff Cdr = 0.60 Riser orifice coeff H 1 n = 5 Number of Holes Hld = 2 Hole Dia. (in) EH1 - 20.00 Elev. Holes (1) H2n = 5 Number of Holes H2d = 2 Hole Dia. (in) EH2 = 20.00 Elev. Holes (2) H3n - 0 Number of Holes H3d = 2 Hole Dia. (in) EH3 = 20.00 Elev. Holes (3) BARREL: Db = 15 Barrel Dia. (in) Einv = 20.00 Elev invert Barrel (ft) Cdb - 0.60 Barrel orifice coeff 9.34 Page 4 3 �� hh• AL'oyq` y9 ` U T855o = J'F,' �tiGrrut:e�' •� C. R00 Barren Adjustment Factor EMERGENCY WEIR Page 5 Cw = 3 Weir coeff Ecr = 6.99 Elev weir coeff (ft) Lw = 5 Weir Length (ft) Riser Riser Riser Elevation Hole Hole Hole Riser Riser Barrel Principal Emergcy (1) (2) (3) (weir) (orifice) Spillway Weir 6.00 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.00 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.01 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.05 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.10 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.19 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.30 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.46 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.63 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 6.83 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.0 1.03 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.1 7.22 0.0 0.0 0.0 0.0 0.0 0.0 0.00 1.7 7.40 0.0 0.0 0.0 0.0 0.0 0.0 0.00 3.9 7.54 0.0 0.0 0.0 0.0 0.0 0.0 0.00 6.1 7.65 0.0 0.0 0.0 0.0 0.0 0.0 0.00 8.1 7.73 0.0 0.0 0.0 0.0 0.0 0.0 0.00 9.5 7.78 0.0 0.0 0.0 0.0 0.0 0.0 0.00 10.5 7.80 0.0 0.0 0.0 0.0 0.0 0.0 0.00 10.9 7.79 0.0 0.0 0.0 0.0 0.0 0.0 0.00 10.8 7.78 0.0 0.0 0.0 0.0 0.0 0.0 0.00 10.5 7.76 0.0 0.0 0.0 0.0 0.0 0.0 0.00 10.1 7.70 0.0 0.0 0.0 0.0 0.0 0.0 0.00 9.0 7.63 0.0 0.0 0.0 0.0 0.0 0.0 0.00 7.7 7.56 0.0 0.0 0.0 0.0 0.0 0.0 0.00 6.5 7.50 0.0 0.0 0.0 0.0 0.0 0.0 0.00 5.4 7.44 0.0 0.0 0.0 0.0 0.0 0.0 0.00 4.5 7.38 0.0 0.0 0.0 0.0 0.0 0.0 0.00 3.7 7.34 0.0 0.0 0.0 0.0 0.0 0.0 0.00 3.1 7.30 0.0 0.0 0.0 0.0 0.0 0.0 0.00 2.6 7.26 0.0 0.0 0.0 0.0 0.0 0.0 0.00 2.1 7.23 0.0 0.0 0.0 0.0 0.0 0.0 0.00 1.8 7.17 0.0 0.0 0.0 0.0 0.0 0.0 0.00 1.1 7.13 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.7 Page 6 ROUTING OF INFLOW HYDROGRAPH THROUGH POND AND OUTFLOW DEVICE Total Riser Riser Riser Barrel Emerg Time Inflow Storage Stage Outflow Holes (weir) (orifice) Spillway t(hr) cfs cf Elevation cfs (1+2+3) cfs cfs cfs cfs cfs 0.000 0 0 6.00 0.00 0.00 0.00 0.00 0.00 0.00 0.037 1 0 6.00 0.00 0.00 0.00 0.00 0.00 0.00 0.075 2 92,7814 6.01 0.00 0.00 0.00 0.00 0.00 0.00 0.112 4 402.053 6.05 0.00 0.00 0.00 0.00 0.00 0.00 0.149 7 989.668 6.10 0.00 0.00 0.00 0.00 0.00 0.00 0.187 11 1948.41 6.19 0.00 0.00 0.00 0.00 0.00 0.00 0.224 15 3401.98 6.30 0.00 0.00 0.00 0.00 0.00 0.00 0.261 19 5443.18 6.46 0.00 0.00 0.00 0.00 0.00 0.00 0.299 21 7979.2 6.63 0.00 0.00 0.00 0.00 0.00 0.00 0.336 23 10855.4 6.83 0.00 0.00 0.00 0.00 0.00 0.00 0.374 23 13917.2 7.03 0.11 0.00 0.00 0.00 0.00 0.11 0.411 23 16995 7.22 1.68 0.00 0.00 0.00 0.00 1.68 0.448 21 19830.5 7.40 3.91 0.00 0.00 0.00 0.00 3.91 0.486 20 22181.4 7.54 6.13 0.00 0.00 0.00 0.00 6.13 0.523 18 24017 7.65 8.05 0.00 0.00 0.00 0.00 8.05 0.560 16 25346.2 7.73 9.54 0.00 0.00 0.00 0.00 9.54 0.598 13 26166.2 7.78 10.50 0.00 0.00 0.00 0.00 10.50 0.635 11 26486.8 7.80 10.87 0.00 0.00 0.00 0.00 10.87 0.672 9 26447.2 7.79 10.83 0.00 0.00 0.00 0.00 10.83 0.710 8 26197.4 7.78 10.53 0.00 0.00 0.00 0.00 10.53 0,747 6 25801.8 7.76 10.07 0.00 0.00 0.00 0.00 10.07 0.822 5 24826 7.70 8.95 0.00 0.00 0.00 0.00 8.95 0.896 3 23699 7.63 7.71 0.00 0.00 0.00 0.00 7.71 0.971 2 22534.8 7.56 6.49 0.00 0.00 0.00 0.00 6.49 1.046 2 21452 7.50 5.41 0.00 0.00 0.00 0.00 5.41 1.121 1 20474.1 7.44 4.48 0.00 0.00 0.00 0.00 4.48 1.195 1 19608.1 7.38 3.71 0.00 0.00 0.00 0.00 3.71 1.270 1 18857 7.34 3.08 0.00 0.00 0.00 0.00 3.08 1.345 0 18208 7.30 2.56 0.00 0.00 0.00 0.00 2.56 1.419 0 17648.2 7.26 2.14 0.00 0.00 0.00 0.00 2.14 1.494 0 17164.6 7.23 1.80 OAO 0.00 0.00 0.00 1.80 1.681 0 16125.1 7.17 1.13 0.00 0.00 0.00 0.00 1.13 1.868 0 15444.2 7.13 0.75 0.00 0.00 0.00 0.00 0.75 7.79703 = maximum stage elevation 10.875 = maximum discharge Evangelical Methodist Church Pasquotank County 10 yr STORM 25 n OEM, 20 15 e .� Y INFLOW (cfs) OUTFLOW (cfs) �10 �� y • � a 'tip,, -'-�!yr � 4�-'+`gip � 0.000 0.500 1.000 1.500 2.000 Time (hrs) — 'acso POND VOLUME CALCULATIONS FOR S:lHyman & Robey '04W41193 Evangelical Methodist ChurchlExc0POND VOLUME CALCULATIONS (1 POND).xls DETENTION POND AREA PERMANENT POOL SURFACE AREA MAIN BASIN SURFACE AREA FOREBAY SURFACE AREA AREA AT EDGE OF MAIN BASIN SHELF AREA OF MAIN BASIN BOTTOM AREA AT EDGE OF FOREBAY SHELF AREA OF FOREBAY BOTTOM SURFACE AREA AT 1" STORAGE ELEVATIONS PP ELEVATION ELEVATION AT EDGE OF MAIN BASIN SHELF ELEVATION OF MAIN BASIN BOTTOM ELEVATION AT EDGE OF FOREBAY SHELF ELEVATION OF FOREBAY BOTTOM ELEVATION OF 1" STORAGE F2 12.860.75 9,360.7 3,500,00 4,716.18 556.94 1,558.35 905.28 14,872.32 F 6,00 4.33 1.00 4.33 3.00 6.99 VOLUME CALCULATIONS F3 MAIN BASIN VOLUME 20,533,98 FOREBAY VOLUME 5,862.04 PERMANENT POOL VOLUME 26,396,02 FOREBAY PERCENTAGE OF TOTAL PERMANENT POOL VOLUME 22.21% TEMP. STORAGE VOLUME (V RUNOFF) 13,727.87 TEMPORARY STORAGE OFFSET SLOPE (EX: 1F 3:1 ENTER 3) 3.Q0 OFFSET FROM PP 2.97 BASIN DIAGRAM CALC MAIN POND SEDIMENT REMOVAL ELEVATION PP DEPTH READS ... SEDMENT SHALL BE REMOVED FOREBAY SEDIMENT REMOVAL ELEVATION PP DEPTH READS... SEDMENT SHALL BE REMOVED 2.25 5 5 5 8/4/2005 8:35 AM PAGE 1 OF 1 Mman_&_ Robey, PC Consulting Engineers and Land Surveyors (252) 335-1888 Office (252) 338-2913 Office (252) 338-5552 Fax August 5, 2005 Ms. Amy Franklin RECEIVEDDept. of Environment and Natural Resources Water Quality Section 943 Washington Square Mall AUG 0 8 2005 Washington, NC 27889 DWQ-WARD Subject: Stormwater Management Permit Evangelical Methodist Church Revised Plans and Calculations Proj. # 041193 Dear Ms. Franklin: Per your request, we have enclosed two copies of each of the following: 1. Complete sets of revised plans. We have added a cover sheet showing the entire acreage tract and corrected the plans and pond details to indicate a storage elevation of 8.99. 2. Detention pond calculations showing the corrected areas and storage elevation. 3. Revised page 1 of 4 of the Wet Detention Basin Supplement. If you have any questions or require additional information, please do not hesitate to call this office at (252) 335-1888. cc: file Sincerely, Se n C. Robey, P.E. Kimberly D. Ha by Project Manager A O. Box 339, Camden, NC 27921 OF \N A TFR Michael F. Easley, Governor � O William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of Water Quality July 26, 2005 Richard Coston 820 Okisko Road Elizabeth City, NC 27909 Subject: Stormwater Review SW7050633 Evangelical Methodist Church Pasquotank County Dear Mr. Coston: This office received a Coastal Stormwater permit application and plans for the subject project on June 23, 2005. A preliminary review of your project indicates that before a State Stormwater permit can be issued the following additional information is needed. A Please provide a full site layout that includes the total 21 acres. The site view can be on one page but should include 2 copies. Please label temporary pool on pond detail. Please show the correct temporary pool elevation on the Wet Detention Basin Supplemental form. Also please ensure that all units are correct. Please ensure that the numbers in Project Information on the Supplemental page and Drainage area information on the application correspond to the numbers used in the calculations section(Watershed area, % Impervious, etc.). The above requested information must be received in this office prior to August 26, 2005 or your application will be returned as incomplete. The return of this project will necessitate resubmittal of all required items including the application fee. If you need additional time to submit the required information, please mail or fax your request for time extension to this office at the Letterhead address. You should also be aware that the Stormwater Rules require that the permit be issued prior to any development activity. Construction without a permit is a violation of 15A NCAC 2H.1000 and North Carolina General Statute 143-215.1 and may result in civil penalties of up to $10,000 per day. Please reference the Stormwater Project Number above on all correspondence. If you have questions, please feel free to contact me at (252).948-3934. cc: Span C. Robey, P.E. ✓Washington Regional Office Sincerely, Amy L. Franklin Environmental Engineer Washington Regional Office Gpj�,Nw-x- on NmCar Natun North Carolina Division of Water Quality Washington Regional Office Phone (252) 946-6481 FAX (252) 946-9215 Internet h2o.enr.state.nc.us 943 Washington Square Mall, Washington, NC 27889 An Equal Opportunity/Affirmative Action Employer- 50% Recycled110°% Post Consumer Paper Customer Service 1-877-623-6748 Hyman & Rohey. PC Consulting Engineers and Land Surveyors (252) 335-1888 Office (252) 338-2913 Office (252) 338-5552 Fax Mr. Bill Moore Dept. of Environment and Natural Resources Water Quality Section 943 Washington Square Mall Washington, NC 27889 Subject: Stonnwater Management Permit Evangelical Methodist Church Proj. # 041193 Dear Mr. Moore: June 22, 2005 RECEIVED JUN 2 � 2005 DWQ-WARD Enclosed for your review and approval, please find the following items: 1. Two (2) copies of the above referenced plans. 2. The original and one (1) copy of the Stormwater Exemption Application and Wet Detention Basin Supplements. Two (2) copies of the project description and calculations. 4. Check in the amount of $420.00 for the required fee. If you have any questions, please do not hesitate to call this office at (252) 335-1888. cc: file Sincerely, Se n C. Robey, P.E. Kimberly D. Hamby Project Manager A O. Box 339, Camden, NC 27921 A ly fzL-I x:'5-- '-Tr%d-r� U'C� FINANCIAL RESPONSIBILITYIOWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT No person may initiate a land -disturbing activity on one or more acrep A before this form and an acceptable erosion and sedimentation control plan ba 9c bMt dnF 7) 11, approved by the Land Quality Section, NC Department of Environment, and rat Resources. Ple e type or print and, if question is not applicable, place NIA in the blank). Fi O �J L1N 23205 Part A. LAND QUALITY SECTION Project Name �E v a n e i.Lr a 1 _N e t h o.di-s t 1) 11 rr h WASHINQTQN REGIONAL OFF1C E 2. Location of land -disturbing activity:. County P a s q u o t a n k City or Township nv _ _�nn_rn �,n,;l_, and Highway/Street 40 ) 3. Approximate date land -disturbing activity will be commenced: July 2005 4. Purpose of development (residential, commercial, industrial, etc.): T n s t-- i t- 11 t- i c n a 1 5. Total acreage disturbed or uncovered (including off -site borrow and waste areas):: `� RECEIVED 7.0 6. Amount of fee. enclosed $ 350.00 SUN 2 4 2005 7. Has an erosion and sedimentation control plan been filed? Yes x No Enclosed x DWQ-InJ► R0 8 Person to contact should sediment control issues arise during land -disturbing activityll.V ver'1RV Name Richard Coston - - - - Telephone 2 5 2---2 6'4— 22 4 5 -_- -- 9. Landowner(s) of Record (Use blank page to list additional owners): Evangelic,] Methodist church Name(s) 820 Okisko Road Current Mailing Address Elizabeth City, NC 27909 City State Zip 10. Recorded in Deed Book No. 766 Current Street Address City State Zip Page No. ()5 A 3 Part B. 58 150 Person(s) or firm(s) who are financially responsible for this land -disturbing activity (Use a blank page to list additional persons or fines): Richard Coston, Trustee Name of Person(s) or Firm(s) 820 Okisko Road Current Mailing Address City State Zip 252-264-2254 Telephone Current Street Address City Telephone State Zip 2. (a) If the Financially Responsible Party is not a resident of North Carolina give name and street address of a North Carolina Agent. Mailing Address City State Zip Telephone Street Address City Telephone State Zip (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. Name of Registered Agent Mailing Address Street Address City State Zip City State Zip Telephone Telephone 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 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. Richard CasLan- Type or print name Signa r t,-�— Trli.s rep -- — Title or Authority Date sA �, (c,��r ., a Notary Public of the County of Pc, State of North Carolina, hereby certify that LLc> �Q C�r1 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 _� V. , l9 acy_:, S Seal MMIANNE J. COOPER' Notary NOTARY PUBLIC PASQUOTANK COUNA NC My commission expires - �$ ;PROJE'CT'DESCRIP'TiON' Evangelical Methodist Church Pasquotank County - North Carolina DWQ-WARD i' ---1. June 22, 2005 The Evangelical Methodist Church owns 21.27 acres on the corner of SR 1197 and SR 1140. Existing features include a youth services building, a home and the existing church and related parking. This plan is for the addition of a new multi -purpose building with related parking, drainage and utilities. The site is zoned R-15. While the total site coverage is only 18.59%, the new construction will create a high density cluster. That area and a portion of the existing development will be called Drainage Area 1. The remaining land, both undeveloped area and a portion of the area containing the existing development will be Drainage Area 2 with no stormwater treatment. Drainage Area I contains 5.62 acres that will include all of the new development and a portion of the adjacent existing features. The buildings and the proposed covered sidewalk areas contribute 34,974 sf. The parking is 96,004 sf and sidewalks contribute another 5,169 sf of impervious surface for a total impervious area of 3.13 acres or 55.61%. The detention pond for this drainage area was designed for 90% TSS removal. Drainage Area 2 contains the remaining 15.65 acres. It contains a large portion of the existing buildings and most of the existing parking area. There are 15,671 sf of roof and 15,294 sf of asphalt parking and 5,149 sf concrete sidewalk for a total impervious area of 0.83 acres or 5.3%. These areas will be allowed to continue draining as they do currently. The soils on site are classified as Augusta and Roanoke. The lack of permeability of this soil and the high water table makes wet detention the best method of stormwater treatment for this site. The disturbed area for this development will not exceed 7 acres. Limits of disturbance have been shown on the plans. PROJECT DESCRIPTION Evangelical Methodist Church Pasquotank County - North Carolina jun&, 22 ' 2005 The Evangelical Methodist Church owns 21.27 acres on the corner of SR 1197 and SR 1140. Existing features include a youth services building, a home and the existing church and related parking. This plan is for the addition of a new multi -purpose building with related parking, drainage and utilities. The site is zoned R-15. While the total site coverage is only 18.59%, the new construction will create a high density cluster. That area and a portion of the existing development will be called Drainage Area 1. The remaining land, both undeveloped area and a portion of the area containing the existing development will be Drainage Area 2 with no stormwater treatment. Drainage Area 1 contains 5.62 acres that will include all of the new development and a portion of the adjacent existing features. The buildings and the proposed covered sidewalk areas contribute 34,974 sf. The parking is 96,004 sf and sidewalks contribute another 5,169 sf of impervious surface for a total impervious area of 3.13 acres or 55.61 %. The detention pond for this drainage area was designed for 90% TSS removal. Drainage Area 2 contains the remaining 15.65 acres. It contains a large portion of the existing buildings and most of the existing parking area. There are 15,671 sf of roof and 15,294 sf of asphalt parking and 5,149 sf concrete sidewalk for a total impervious area of 0.83 acres or 5.3%. These areas will be allowed to continue draining as they do currently. The soils on site are classified as Augusta and Roanoke. The lack of permeability of this soil and the high water table makes wet detention the best method of stormwater treatment for this site. The disturbed area for this development will not exceed 7 acres. Limits of disturbance have been shown on the plans. s _ STORMWATER SUBMITTAL REQUIREMENTS. DETENTION POND (cont) B. Calculations 1. 85 % or 90 % TSS Chart noted. ,I 2. Pond dep . 5T-V 3. SAIDA ratio calculation. 4. Required surface area at permanent pool. 5. Provided surface area at permanent pool (Based on pond dimensions) 6. Required volume. 7. Provided.volume. 8. Orifice size based on provided volume. 9. Engineer seal. 10. Built -upon area to each pond. 11. Forebay designed to hold 20% of the first inch. 12. Non -erosive flow in the vegetated filter, if using 85 % TSS. 0 C. Supporting Documentation I . Completed permit application a. Is the person who signed the landowner or a lessee? Must be landowner. ' I r[A,�4tx, b. All sections completely filled in. C. Check signature per .1003 (e). Make sure title is provided. d. If agent signs, signatory authorization from owner. / e. Wet detention supplement sheet provided. f. Mailing address & phone of applicant- no CIO. ✓ g. Verify water body classification. h. Missing information. 2. Signed Operation and Maintenance Plan (includes all items on DWQ O & M form.) ks- 64� bcclk cw mad alef ` WCj �.� on C)-�,A P° ,�- Pb on 5�P% EvaAyhcal M4001's} - STORMWATER SUBMITTAL REQUIREMENTS. DETENTION POND Site Plan ;/ 1. Development/Project Name i/ ;/ 2. Engineer name and firm. 3. Legend �� 4. North Arrow .. - y 5. Location Map with direction, distance to named streets, NCSR numbers. 6. Scale ✓ 4� ✓�� 7. 8. Date Revision number and date. RPu�S�on n6� tr5 kd . ✓ 9. Original contours, proposed contours, spot elevations, finished floor elevations. ;/ 10. Existing drainage, including off -site., Map�of offsite area? 11. Property/Project boundary lines, dimensioned. N i i� 12. Mean High Water Line, if necessary. 13. Drainage easements, pipe sizes.. 14. Wetlands delineated, or a nod on the plans that none exist. 15. Details of the road, parking, cul-de-sacs, including sidewalks, curb and gutter.. 16. Drainage area to each pond delineated. 17. Dimensions of the permanent pool. ✓ 18 Vegetated filter detail if using 85 % TSS . This is NOT a connector ditch. 10 'C� 19. Dimensions of the road, parking cul-de-sacs, sidewalks, and curb and gutter. f 20. Unit footprint with dimensions and concrete wood deck areas noted.for apa=ents or condo development. 21. Forebay at each inlet. Prefer one inlet / 22. Inlets located such that entire pond is used for treatment and no short-circuiting. 23. Pond section with: Bottom elevation r/ Permanent pool elevation PP v Storage pool elevation SP Slopes: 3:1 above permanent pool l*&- Vegetated shelf @6:1 slope, with begin and end elevations around pond. Forebay bottom elevation, 3:1 slopes, - y Forebay weir elevation between PP and SP. 24-. Outlet structure detail with trash rack and orifice. 25. Now on plans that all roof drains must be directed so as to be picked up by the pond. ✓ .26. A 3:1 L:W ratio has been provided for the pond. Q. 1 L...i P.O. Box 20400 204 E. Shefford St. PO M O NA Greensboro, NC 27420 Greer, SC 29650 PIPE Tel: 336-292-8060 Tel: 864-244-6451 PRODUCTS Fax: 336-292-2251 Fax: 864-268-5776 Pomona Supply Company I D.ra C'C� Are�.� 5. �aGri _ t5-rn 1j,a-�S_NfCal_ 3 12ac- - � - -- -.R_ _J - - I °l lo. 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