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Home My WebLink AboutSW8051138_COMPLIANCE_20051216STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW rJOSlI%� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD q t20b ROVEDP NORTH CAROLiNA E 0M� SSION MANAGEMENT C WISION OF WATER QUALITY DRAINAGE AREA 1 101.5'9I sir EDEN BRIDGE SUBDIVISION DRAINAGE AREA MAP DRAINAGE AREA 2 110,4S9 s;r DRAINAGE AREA 3 '7L,38`l sF DETENTION POND ANALYSIS FILE NAME: G:IDATAIWPDATAIWQSIPOND1051138-1.xls PROJECT #: SW8 051138-1 REVIEWER: R. Gordon PROJECT NAME: Eden Bridge DATE: 19-Dec-05 Receiving Stream: Calico Creek Class: Sc Drainage Basin: White Oak Index No. 21-32 Site Area 6.77 acres Drainage Area 1;091i square feet Area = 2.47 acres IMPERVIOUS AREAS Buildings Streets Sidewalks TOTAL SURFACE AREA CALCULATION % IMPERVIOUS 53.96% Des. Depth 5 TSS: 90 Rational C 19739.00 square feet 34310.00 square feet 4005.00 square feet square feet square feet square feet 5$QSOCI square feet Rational Cc= 0.09 SAIDA Ratio 3.82% Req. SA 4106 sf Prov. SA=i58$2i sf VOLUME CALCULATION * place a "1" in the box if Rational is used Rational ?* Des. Storm IiIIQ inches Rv= 0.54 Bottom 8 msl Perm. Pool i i 3.0'0€i m s I Design Pool 14 msl Design SA 8000 sf Req. Volume :480 cf Prov. Volume ''94.1': cf ORIFICE CALCULATION Avg. Head = Flow Q2, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = COMMENTS See orifice routing for drawdown calc. FC)PPRAY Perm. Pool Volume= Req. Forebay Volume= Provided Volume= Percent= SA a@ _ Elevation= Q2 Area = Q5 Area = Orifice Area Q= 12109 2421.8 3029.00 1.21 sq. in. 0.48 sq. in. 123 sq. in. 0.028 cfs x in DETENTION POND ANALYSIS FILE NAME: G:\DATA\WPDATA\WQS\POND1051138-2.xls PROJECT#: SW8 051138-2 REVIEWER: R. Gordon PROJECT NAME: Eden Bridge DATE: 19-Dec-05 Receiving Stream: Calico Creek Class: Sc Drainage Basin: White Oak Index No. 21-32 Site Area 6.77 acres Drainage Area 6square feet Area 2.54 acres , 0. IMPERVIOUS AREAS Buildings Streets Sidewalks 11111911j"I SURFACE AREA CALCULATION % IMPERVIOUS 78.93% Des. Depth 6 TSS: 90 Rational C 65066.00 square feet 22107.00 square feet square feet square feet square feet square feet square feet Rational Cc= 0.04 SA/DA Ratio 4.53% Req. SA 4998. sf Prov. SA sf VOLUME CALCULATION * place a "'I" in the box if Rational is used Rational ?* Des. Storm 11 inches Rv= 0.76 Bottom 7 msl Perm. Pool m s I Design Pool 14 msl Design SA 8482 sf Req. Volume cf Prov. Volume cf ORIFICE CALCULATION FOREBAY Perm. Pool Volume= 15469 Req. Forebay Volume= 3093.8 Provided Volume= 3005.00 Percent= SA @ Elevation= Avg. Head = 0.47 ft Q2 Area = 1.76 sq. in. Flow Q2, cfs 0.040 cfs Q5 Area = 0.70 sq. in. Flow Q5, cfs 0,016 cfs Orifice Area 1.23 sq. in. No. of Orifices 1 Q= 0.028 cfs Diameter, inches weir H x W in X in Drawdown days COMMENTS Surface Area , Volume and Orifice are within Design Guideline[ DETENTION POND ANALYSIS FILE NAME: G:\DATA\WPDATA\WQS\POND1051138-3.xls PROJECT#: SW8 051138-3 REVIEWER: R. Gordon PROJECT NAME: Eden Bridge DATE: 1 9-Dec-05 Receiving Stream: Calico Creek Class: SC Drainage Basin: White Oak Index No. 21-32 Site Area 6.77 acres Drainage Area square feet Area = 1.75 acres IMPERVIOUS AREAS Buildings Streets Sidewalks other TOTAL SURFACE AREA CALCULATION % IMPERVIOUS 56.59% Des. Depth 4 TSS: 90 VOLUME CALCULATION 18912.00 square feet 19702.00 square feet 3493.00 square feet 1120.00 square feet square feet square feet square feet Rational ?* Des. Storm inches Rv= 0.56 Bottom 9.2 rnsl Perm. Pool 13 2 msl Design Pool 14.2 msI Design SA 5440 sf Req. Volume 356tii cf Prov. Volume cf ORIFICE CALCULATION Avg. Head = Flow Q2, cfs Flow Q5, cfs No. of Orifices Diameter, inches Drawdown = COMMENTS OK Rational C Rational Cc= 0.09 SA/DA Ratio 4.96% Req. SA 3788 sf Prov. SA sf * place a 1" in the box if Rational is used Perm, Pool Volume= 6515 Req. Forebay Volume= 1303 Provided Volume= 1301.00 Percent= SA @ Elevation= Q2 Area = Q5 Area = Orifice Area n 0.89 sq. in. 0.36 sq. in. 0.79 sq. in. 0.018 cfs X in TopoZone - The Web's Topographic Map Page 1 of 1 -$w• �..... .CS. -- -i'" ... ..-s^�d.`6:%C:r jtopozone- - �_ ' - - 4 r , r Iz'rnr � i� fi ��,(•S . f99�loD3lg>okc ``, _ $1��•��,RI�'� ` �� 3 v ' - - - � -� - '+s'-��":•- _ � �.. =' .—�`s.-_ xS � �k ^,� +'r'�� r$S+� 3 t r�; � *•�X s � ;-+' �'" • l� ^� jj� V J. -�'t): w rhfW,.t`^ '.... y y�rr / F Golf CsJU[5.. Y yam•J ` x w . r . � E` • .«ys +.,.r--.•!°;� '• t��`'O me o.� ev''i' � � ., . �y s; �• is . , _ �.� N - x -c:.. 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T. f(� � -.. �,_ 6 4�.{,izr..: 3i',r 5��zw:i'l .�•. -�Y <..tiiL1�.1 ,`N 4 '.`�e, j!F AA 5k 0 0.3 0.6 0.9 1.2 1.5 km 0 0.1 0.2 0.3 0.4 0.5 mi Map center is 340 43.90'N, 760 45.54'W (WGS84/NAD83) Mansfield quadrangle M=-9 • g93 Projection is UTM Zone 18 NAD83 Datum G=-1.003 http://www.topozone.com/print.asp?z=18&n=3844702.00003519&e=3 38952.999992407&s=4... 12/6/2005 WHITE OAK RIVER BASIN Name of Stream Subbasin Stream Index Number Map Number Class Burnt House Branch WOK02 19-10-2 H29SW9 SC;NSW Cabs Creek WOK05 21-35-3 I32NE4 SA;ORW Caggs Creek WOK05 21-35-7-34-1 I33NW4 SA;ORW Caleb Branch (City weeks Branch) WOK01 20-23-3 H30SE7 SA;HQW Calebs Creek WOKO1 20-15 H30SW8 C Cales Creek WOK01 20-22 H30SE7 SA;HQW Calico Creek WOK03 21-32 I32NW1 SC;HQW Cartwheel Branch WOK01 20-26-1 I30NW3 SA;HQW Catfish Lake WOK01 20-9-1 H30NE4 C Catherine Lake WOK02 19-17-1-1 H28SE5 B;NSW Catherine Lake Creek WOK02 19-17-1 H28SE5 C;NSW Cedar Creek WOK04 21-35-7-3-3-1 H33SW3 SA;HQW Cedar Inlet WOK05 21-35-7-8 H33SE4 SA;ORW Cedar Swamp Creek WOK03 21-7 H31SW9 C Chadwick Bay WOK02 19-39-4 I29SE7 SA;HQW Chainey Creek WOK02 19-10 1429SWB SC; NSW Charles Creek WOK02 19-39-4-1-2 I29SW6 SA;HQW Chinkapin Branch WOKO1 20-3-2 1429NE7 C Clay Bank Branch WOK02 19-41-5-2 I29SR3 SA;HQW Codds Creek WOKOS 21-35-7-33 I33NW4 SA;ORW Cogdels Creek (Coglin Creek) WOK02 19-23 I29NE7 SC;NSW Core Creek (Intracoastal Waterway Adams Creek NEU10 21-24 H32SWB SA;HQW Canal) Core Creek (Intracoastal Waterway Adams Creek WOK03 21-24 H32SWB SA;HQW Canal) Core Sound WOK04 21-35-7 H33NEB SA;ORW Core Sound WOK05 21-35-7 H33NEB SA;ORW Courthouse Bay WOK02 19-36 I29SE1 SA;HQW Cow Channel WOK01 19-41-15 I30NW9 SA;ORW Cowford Branch WOK02 19-2 H28NE4 C;NSW Cowhead Creek WOK02 19-24-2 129NEB SC;NSW Cowhorn Swamp WOK02 19-4 H29NW7 C;NSW Crab Point Bay WOK03 21-30 132NW1 SA;HQW Crabbing Creek WOK04 21-35-1-3 H32SW6 SA;HQW Cypress Drain WOK03 21-2-2 H31SW5 C Davis Bay (Cheney Bay) WOK04 21-35-1-11 I32NE1 SA;HQW Deep Creek WOK03 21-11 H31SE4 C Deep Creek WOK04 21-35-1-2 H32SE4 SA;HQW Deep Gully Creek (Elizabeth Lake) WOK02 19-9-1 H29SW9 SC;NSW Deep Run WOK02 19-17-2 I28NE2 C;NSW Deer Creek WOK03 20-36-1 I30NE5 SA;ORW Deer Pond WOK05 21-35-7-27 I33NW2 SA;ORW Dennis Creek (Demkis Creek) WOKO1 20-34 I30NW6 SC Dicks Creek WOKol 19-41-16-5 I30NW9 SA;HQW Ditch Cove WOK04 21-35-7-22-2 1433SW4 SA;ORW Dubling Creek WOKO1 20-30 I30NE4 SA;HQW Duck Creek WOK02 19-25 I29SE1 SC;NSW East Prong Broad Creek WOK03 20-36-7-2 I31NW2 SA;HQW East Prong Gales Creek WOK03 20-36-8-1 I31NW3 SA;HQW East Prong Jasons Branch WOK03 21-3-5-1 H31SWB C East Prong Sanders Cr. WOK03 20-36-6-1 I31NW1 SA;HQW Eastman Creek WOK03 21-24-1 H32SW5 SA;HQW Eastmouth Bay WOK04 21-35-1-12-3.5 I32NEG SA;HQW Edwards Creek WOK02 19-13 I29NW2 SC;HQW,NSW Ellis Cove WOK02 19-33 I29Sw3 SA;HQW Everett Creek WOK02 19-32 I29SW5 SA;HQW Fannie Creek WOK02 19-34 I29SW6 SA;HQW Page 2 of 7 OPERATING AGREEMENT OF EDENBRIDGE LLC a North Carolina limited liability company Dated: February 8, 2005 THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE NORTH CAROLINA SECURITIES ACT OF 1990, AS AMENDED, IN RELIANCE UPON THE EXEMPTION FROM REGISTRATION SET FORTH IN SECTION 78A-17(9) OF SUCH ACT. IN ADDITION, THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION IN RELIANCE UPON AN EXEMPTION FROM SUCH REGISTRATION SET FORTH IN THE SECURITIES ACT OF 1933 PROVIDED BY SECTION 4(2) THEREOF, NOR HAVE THEY BEEN REGISTERED WITH THE SECURITIES COMMISSION OF CERTAIN STATES IN RELIANCE UPON CERTAIN EXEMPTIONS FROM REGISTRATION. THESE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY AND MAY NOT BE OFFERED WITH THE TERMS AND CONDITIONS OF THIS AGREEMENT AND IN A TRANSACTION WHICH IS EITHER EXEMPT FROM REGISTRATION UNDER SUCH ACTS OR PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACTS. —Doc# 55193.01 — IN WITNESS WHEREOF, the undersigned, being the initial Manager and all of the Members of the Company, have caused this Operating Agreement to be duly adopted effective as of the 8'h day of February, 2005, and do hereby assume and agree to be bound by and to perform all of the terms and provisions set forth in the Operating Agreement. Edenbridge Housing of Morehead City Inc., Managing Member By: t .0 Keith Walker , Its President 23 — Doc# 55192.01 - - OPERATING AGREEMENT OF EDENBRIDGE LLC Name and Address of Member Contribution Edenbridge Housing of Morehead City Inc. $10.00 315 Turner Street Beaufort, NC 27516 East Carolina Community Development Inc. $90.00 315 Turner Street Beaufort, NC 27516 24 — Doc# 55192.01 -- Membership Interest 0.01 % 99.99% OPERATING AGREEMENT OF EDENBRIDGE LLC SCHEDULE II Managers of the Company: Edenbridge Housing of Morehead City Inc. 315 Turner Street Beaufort, NC 27516 25 —Dac# 55192.a] — PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 1 of ar CALCULATED BY: B. MCMANNEN APPROVED BY: tttt�� of I 1IZb5- `%N �1 / O �� ..•.. ••. •• O� `�' S'/ `• `,� �'i POND #1 ��` • °��;� /� i SEA � e w STORMWATER DETENTION POND DESIGN r/i�,�fD`C�Ly�y4e`a DRAINAGE AREA = 107,591 SF DRAINAGE TO SC WATERS = 1.0 INCH (NEWPORT RIVER - THE NARROWS) IMPERVIOUS AREA BUILDINGS/ PARKING = 58,054 SF ROADS = 0 SF OFFISTE 0 TOTAL = 58,054 SF % IMPERVIOUS = 53.96% 55.00% (USE FOR DESIGN) USE A 5.0' DEEP POND WITH 90% TSS REMOVAL (SEE SAIDA CHART) SA/DA = 3.90% MIN. REQ'D SA a@ PERMANENT POOL = 4196 SF SAREQU = (SAIDA)(DRAINAGE AREA) SA PROVIDED = 5882 SF MIN. REQ'D VOLUME Rv = 0.05 + 0.009(%IMP)= 0.55 VOLUME REQ'D = 4886 CIF VOLREO-0 = (1"112")(Rv)(DRAINAGE AREA) VOLUME PROVIDED = 6941 CF RECEIVED DEC 1 6 2005 BY: PROJECT NAME: EDEN BRIDGE SUBDIVISION DA-1 DA-2 DA-3 DA-4 DA-5 DA-6 DA-7 DA-8 DA-9 DA-10 PIPE1 (DA-1) PIPE2 (DA-1+2) PIPE3 (DA-1+2+3) PIPE4 (DA-1+2+3+4) PIPES (DA-10) PIPES (DA-10+9) PIPE7 (DA-10+9+8) PIPES (DA-10+9+8+7) PIPE9 (DA-10+9+8+7+6) PROJECT NUMBER: PM 858-22 SHEET NUMBER z of 9- CALCULATED BY: B. MCMAN EN Z f OS APPROVED BY: . C `"011111111,18,I STORMDRAIN PIPE SIZING ?•�OFES`S/O %`��ji�! DRAINAGE AREA (SF) DRAINAGE AREA (AC) C 1 010 5205 0.12 1.00 7.23 0.86 3791 0.09 0.93 7.23 0.59 16847 0.39 0.90 7,23 2.52 13687 0.31 0.93 7.23 2.11 7219 0.17 0.89 7.23 1.07 6077 0.14 1.00 7.23 1.01 5946 0.14 0.64 7.23 0.63 5239 0.12 0,60 7.23 0.52 5242 0.12 0.57 7.23 0.50 3125 0.07 0.44 7.23 0.23 Q (CFS) PIPE PROPOSED % SLOPE Q PROPOSED PIPE FLOWING FULL (CFS) 0.86 12" RCP 0.3% 1.95 1.45 12" RCP 0.3% 1.95 3.97 18" RCP 0.3% 5.75 6.08 24" RCP 0.3% 1 12.39 0.23 12" RCP 0.3% 1.95 0.72 12" RCP 0.3% 1.95 1.25 12" RCP 0.3% 1.95 1.88 12" RCP 0.3% 1.95 2.89 15" RCP 0.3% 3.54 PIPE10 (DA-1 - 101 10.03 1 24" RCP 1 0.30% 12.39 'T e SEAL 13343 �i� '� ° .�Gl lip ��;�•°` !(� °� PERMANENT POOL VOLUME (method per DWQ) PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 3 of 4+++++"011r►►►►►► CALCULATED BY: B. MCMANNEN APPROVED BY: e• •e ,� 'V e � a • o _ SEAL 0 4 13343 s° a � 'x] • • r Elevation Section SA SF Avg. SA Ht FT Vol. CF 13.00 Permanent pool 5882 4103 2.00 8205 11.00 Shelf 2323 1301 3.00 3903 8.00 Bottom 1 279 Total Vol. 1 12109 FOREBAY VOLUME Elevation Section SA SF Avg. SA Ht. FT Vol. CF 13.00 Permanent 2ool 1535 1010 3.00 3029 10.00 Bottom 484 Total Vol. 3029 Forebay % of Permanent Pool Volume = 25.01% MAIN BASIN VOLUME Elevation Section SA SF Avg. SA Ht F Vol. CF 13.00 Permanent pool 4190 2844 2.00 5688 11.00 Shelf 1498 829 3.00 2487 8.00 Bottom 161 Total Vol. 1 8175 Storage volume required 4886 Elevation Section SA SF 13.00 Permanent pool 5882 6941 14.00 Storage pool 8000 OVERFLOW DEVICE L=Q t a1C,wH 3r2 Ht. FT Vol. CF 1.00 6941 Total Vol. 6941 Qio = 10.03 C„, = 3.0 (BROAD CRESTED WEIR) H = 1.00 L = 3.34 4 FT MINIMUM WEIR LENGTH I q i PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER .4�jdlllj�tj CALCULATED Bl`�� fJ� Ili♦♦♦ �� 4 APPROVED B • �.. .; ♦ L U SEDIMENT BASIN (PROPOSED POND DURING CONSTRUCTION) SED. DRAINAGE DRAINAGE SED. STORAGE BASIN AREA (SF) AREA (AC) STORAGE PROVIDED REQ D (CF) IN POND CF 1 107591 1 2.47 4446 11204 RIPRAP OUTLET PROTECTION � i Q� - y •• i • *;Q SEAL {. 13343 . 2 . CrINE .m'Q mil• ♦I�94� `R •••....•a ♦��Dckj o ' fol (FOREBAY + MAIN BASIN) 24" PIPE INTO POND 10.03 0.30 4.39 CLASS A 6'x6x1.5' 24" DISCHARGE INTO DITCH 10.03 0.30 4.39 CLASS A 6'x6x1.5' orifice dia.= 1.25 in. orifice area= 0.0085 sf PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER S�of 5- CALCULATED BY: B %401UPr% N r Z ' Z'o5 APPROVED BY'.�� ,t 2 ;eQ.O 'd9 v9 �r SEAL a orifice eqn. = Q=C[(agh)^1rz 13� 73 '� P � - Cd= 0.6 • \ '.0 '.4f4,. NE�`' R1u lncrement minutes ^3 s 1) C` to ame ge o ume= 6940 {required 1") overflow el.= 14 perm. pool el.= 13 Time Cumulative Cumulative Volume Height Flow Volume Volume Increment Time Time Initial Out Out Remaining (minutes) (minutes) (hours) (ft-3) (feet) (cfs) (cf) (ft-3) 0 0 6941.00 1.00 0.0410 0.00 6941,00 120 120 2 6941.00 1.00 0.0410 295.29 6645.71 120 240 4 6645.71 0.96 0,0401 288.94 6356,76 120 51 M% 0.0085 6356.76 0.92 0.0392 282.59 6074.17 120 120.51 2.0085 6074.17 0.88 0.0384 276.24 5797.93 120 1.96% 0.000325 5797,93 0,84 0.0375 269.89 5528.04 120 120.0195 2.000325 5528.04 0.80 0.0366 263.53 5264.52 120 240.0195 4.000325 5264.52 0.76 0.0357 257.17 5007.34 120 360.0195 6.000325 5007.34 0.72 0.0348 250.81 4756.53 120 480.0195 8.000325 4756.53 0.69 0.0340 244.45 4512.08 120 600.0195 10.000325 4512.08 0.65 0.0331 238.08 4274.00 120 720.0195 12.000325 4274.00 0.62 0.0322 231.72 4042.28 120 840.0195 14.000325 4042.28 0.58 0.0313 225.35 3816.93 120 960.0195 16.000325 3816.93 0.55 0A304 218.98 3597.95 120 1080.0195 18.000325 3597.95 0.52 0.0295 212.60 3385.35 120 1200.0195 20.000325 3385.35 0.49 0.0286 206.23 3179.12 120 1320.0195 22.000325 3179.12 0.46 0.0278 199.85 2979.28 120 1440.0195 24.000325 2979.28 0.43 0.0269 193.46 2785,81 120 1560,0195 26,000325 2785.81 0.40 0.0260 187.08 2598.74 120 1680.0195 28.000325 2598.74 0.37 0.0251 180.69 2418.05 120 1800.0195 30.000325 2418.05 0.35 0.0242 174.29 2243.76 120 1920.0195 32.000325 2243.76 0.32 0.0233 167,89 2075.87 120 2040.0195 34.000325 2075.87 0.30 0.0224 161.49 1914.38 120 2160.0195 36.000325 1914.38 0.28 0.0215 155.08 1759.30 120 2280.0195 38,000325 1759.30 0,25 0.0206 148.67 1610.63 120 2400.0195 40.000325 1610.63 0.23 0.0198 142.25 1468,39 120 2520.0195 42.000325 1468.39 0.21 0.0189 135.82 1332,57 120 2640.0195 44.000325 1332.57 0.19 0.0180 129.39 1203,18 120 2760.0195 46.000325 1203.18 0.17 0.0171 122.94 1080.24 120 2880.0195 48.000325 1080.24 0.16 0.0162 116.49 963.74 120 3000.0195 50.000325 963.74 0.14 0.0153 110.03 853.71 120 3120A195 52.000325 853.71 0.12 0.0144 103.56 750.15 120 3240.0195 54.000325 750.15 0.11 0.0135 97.08 653.07 120 3360.0195 56.000325 653.07 0.09 0.0126 90.58 562.49 120 3480.0195 58.000325 562.49 0.08 0.0117 84.06 478.43 120 3600.0195 60.000325 478.43 0.07 0.0108 77.53 400.90 120 3720,0195 62.000325 400.90 0.06 0.0099 70.97 329.94 120 3840.0195 64.000325 329.94 0.05 U089 64,38 265.55 120 3960,0195 66.000325 265.55 0.04 0.0080 57.76 207.80 120 4080.0195 68.000325 207.80 0.03 0.0071 51.09 156.70 120 4200.0195 70.000325 156.70 0.02 0.0062 44.37 112.33 120 4320.0195 72.000325 112.33 0.02 0.0052 37.57 74.77 120 4440.0195 74.000325 74.77 0.01 0.0043 30.65 44.12 120 4560.0195 76.000325 44.12 0.01 0,0033 23.54 20,58 120 4680.0195 78.000325 20.58 0.00 0.0022 16.08 4.50 120 4800.0195 80,000325 4.50 0.00 0.0010 7.52 -3.02 3.33 DAYS DRAINAGE AREA = DRAINAGE TO SC WATERS = IMPERVIOUS AREA BUILDINGS/ PARKING = ROADS = OFFISTE TOTAL = PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER ) of S� CALCULATED BY: B. M4 WNEN APPROVED BY: ►_ • 01Z, ` e. O .y. .Q 40 2 POND #2 =' SEAS, ter' _ 9 13343 O 't y "GIN ES • ��Ci .` STORMWATER DETENTION POND DESIGN 110,439 SF 1.0 INCH (NEWPORT RIVER - THE NARROWS) 65,066 SF 22,107 SF 0 87,173 SF % IMPERVIOUS = 78.93% 81.00% (USE FOR DESIGN) USE A 6.0' DEEP POND WITH 90% TSS REMOVAL (SEE SA/DA CHART) SA/DA = 4.66% MIN. REQ'D SA @ PERMANENT POOL = 5146 SF SAREQ-D = (SA/DA)(DRAINAGE AREA) SA PROVIDED = 6375 SF MIN. REQ'D VOLUME Rv = 0.05 + 0.009(%IMP)= 0.78 VOLUME REQ'D = 7169 CIF VOLREQ-0 = (1"/12")(Rv)(0RAINAGE AREA) VOLUME PROVIDED = 7429 CF FCEIVED DEC 1 6 2005 DA-1 DA-2 PIPE1 (DA-1) PIPE2 (DA-1+2) PROJECT NAME; EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER Z of .6-- CALCULATED BY: B. MCMANNEN 111111o111ft"� APPROVED BY:� iJ'CA%��i��i STORMDRAIN PIPE SIZING DRAINAGE AREA (SF) L)RAINA(3F- AREA (AC) C I Q10 20123 0.46 0.80 7.23 2.67 92418 2.12 0.38 7.23 5.83 Q (CFS) PIPE PROPOSED % SLOPE Q PROPOSED PIPE FLOWING FULL (CFS) 2.67 15" RCP 0.3% 3.54 8.50 24" RCP 0.3% 12.39 DISCHARGE PIPE (DA-1+2)1 8.50 1 24" RCP 1 5.3% 52.23 PERMANENT POOL VOLUME method per DWQ PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 3 of CALCULATED BY: B. MCMANNEN s�III too APPROVED BY:A -1 �..•OFESSj-O�i2'. Q. O . ". SEAL t3 �= Elevation Section SA SF Avg. SA Ht FT Vol. CF 13.00 Permanent pool 6375 4619 2.00 9237 11.00 Shelf 2862 1558 4.00 6232 7.00 Bottom 254 1 Total Val. 15469 FOREBAY VOLUME Elevation Section SA SF Avg. SA Ht F Vol. CF 13.00 Permanent pool 1531 1002 3.00 3005 10.00 Bottom 472 Total Vol. 3006 Forebay % of Permanent Pool Volume = 19.42% MAIN BASIN VOLUME Elevation Section SA SF Avg. SA Ht (FTj Vol. CF 13.00 Permanent pool 4663 3279 2.00 6557 11.00 Shelf 1894 1018 4.00 4070 7.00 Bottom 141 Total Vol. 10627 Storage volume required 7169 CIF Elevation Section SA SF Avg. SA Ht FT Vol. CF 13.00 Permanent pool 6375 7429 1.00 7429 14.00 Storage pool 8482 Total Vol. 7429 OVERFLOW DEVICE L=Q l o1C,,H312 Qio = 8.50 Cw = 3.0 (BROAD CRESTED WEIR) H = 1.00 L = 2.83 4 FT MINIMUM WEIR LENGTH 0 fell fois000" PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 4 of S CALCULATED BY: �4mmm NF4. APPROVED BY: �S�_ra'CWnCYAO, O.Pi 1 LI►zI �S SEDIMENT BASIN (PROPOSED POND DURING CONSTRUCTION) SED. DRAINAGE DRAINAGE SED, STORAGE BASIN AREA (SF) AREA (AC) STORAGE PROVIDED REO'D (CF) IN POND CF 1 112541 2.58 4650 10101 RIPRAP OUTLET PROTECTION ESs�o.�i,L�,: 70. SEAL A '3343 .ONE @'• t�Q. (FOREBAY + MAIN BASIN) 24" PIPE INTO POND 8.50 0.72 5.92 CLASS B 6'x6xl.5' 24" DISCHARGE INTO DITCH 8.50 0.30 12.24 CLASS 1 8'x6x1.5' PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER S of �iI-..„ CALCULATEfl BY: b, MU �4�� APPROVED BY: ( ,•e• 9C)_{2 ORIFICE SIZING orifice dia.= 1.25 in. 2 a2d��i orifice area= 0.0085 sf orifice eqn. ��'fCU; 9 time increment 120 minutes storage volume= 8486 ft"3 (required 1 ") overflow el.= 14 perm. pool el.= 13 Time Cumulative Cumulative Volume Height Flow Volume Volume Increment Time Time Initial Out Out Remaining (minutes) (minutes) (hours) (ft-3) (feet) (cfs) (cf) (ft-3) 0 0 8486.00 1.00 0.0410 0.00 8486.00 120 120 2 8486,00 1.00 0.0410 295.29 8190.71 120 240 4 8190.71 0.97 0.0403 290.11 7900.60 120 360 6 7900.60 0.93 0.0396 284.93 7615.67 120 480 8 7615.67 0.90 0.0389 279.74 7335.93 120 600 10 7335.93 0.86 0,0381 274.56 7061.37 120 720 12 7061.37 0.83 0.0374 269.37 6792.01 120 840 14 6792.01 0.80 0.0367 264.18 6527.82 120 960 16 6527.B2 0.77 DM60 258.99 6268.83 120 1080 18 6268.83 0.74 0.0353 253.80 6015.03 120 1200 20 6015.03 0.71 0.0345 248.61 5766.42 120 1320 22 5766.42 0.68 0.0338 243.42 5523.00 120 1440 24 5523.00 0.65 0.0331 238.23 5284.77 120 1560 26 5284.77 0.62 0.0324 233.03 5051.74 120 1680 28 5051.74 0.60 0.0316 227.84 4823.90 120 1800 30 4823.90 0.57 0.0309 222.64 4601,26 120 1920 32 4601.26 0.54 0.0302 217.44 4383.82 120 2040 34 4383,82 0.52 0.0295 212.24 4171.58 120 2160 36 4171.58 0.49 0,0288 207.04 3964.54 120 2280 38 3964.54 0.47 0.0280 201.84 3762.71 120 2400 40 3762.71 0.44 0.0273 196.63 3566.08 120 2520 42 3566.08 0.42 0.0266 191.42 3374.65 120 2640 44 3374.65 0.40 0.0259 186.22 3188,44 120 2760 46 3188.44 0.38 0.0251 181.01 3007.43 120 2880 48 3007.43 0.35 0.0244 175.79 2831.54 120 3000 50 2831.64 0.33 0.0237 170.58 2661.06 120 3120 52 2661.06 0.31 0.0230 185.36 2495.70 120 3240 54 2495.70 0.29 0.0222 160.14 2335.56 120 3360 56 2335,56 0.28 0.0215 154.92 218D.65 120 3480 58 2180.65 0.26 0.0208 149.69 2030,95 120 3600 60 2030.95 0.24 0.0201 144.46 1886.49 120 3720 62 1886.49 0.22 0.0193 139.23 1747.26 120 3840 64 1747.26 0.21 0.0186 133.99 1613.27 120 3960 66 1613.27 0.19 0.0179 128.75 1484.52 120 4080 68 1484.52 0.17 0.0172 123.51 1361.01 120 4200 70 1361,01 0,16 0.0164 118.26 1242.75 120 4320 72 1242.75 0.15 0.0157 113.00 1129.75 120 4440 74 1129.75 0.13 0 0150 107.74 1022.00 120 4560 76 1022.00 0.12 0.0142 102.48 919.53 120 4680 78 919.53 0.11 0.0135 97.20 822.32 120 4800 80 822.32 0.10 D.0128 91.92 730.40 120 4920 82 730.40 0.09 0.0120 86.63 643.77 120 5040 84 643.77 0.08 0.0113 81.33 562.43 120 5160 86 562.43 0.07 0.0106 76.02 486.41 120 5280 88 486.41 0.06 0.0098 70.70 415.71 120 5400 90 415.71 0.05 0.0091 65.36 350.36 120 5520 92 350.36 0.04 0.0083 60.00 290.36 120 5640 94 290.36 0.03 0.0076 54.62 235.73 120 5760 96 235.73 0.03 0.0068 49.22 186.52 120 5880 98 186.52 0.02 0.0061 43.78 142.74 120 6000 100 142.74 0.02 0.0053 38.30 104.44 120 6120 102 104.44 0.01 0.0045 32.76 71.68 120 6240 104 71.68 0.01 0.0038 27.14 44.54 120 6360 106 44.54 0.01 0.0030 21.39 23.15 120 6480 108 23.15 0.00 0.0021 15.42 7.73 120 6600 110 7.73 0.00 0.0012 8.91 -1.18 4.58 DAYS PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER J of CALCULATED B. � I tc l05' APPROVED BY:: ,` �� POND # 3 SEAL r 13343 STORMWATER DETENTION POND DESIGN ,p'1CUt �L��y��, DRAINAGE AREA = 76,387 SF DRAINAGE TO SC WATERS = 1.0 INCH (NEWPORT RIVER - THE NARROWS) IMPERVIOUS AREA FUTURE LOT 3 18,912 SF ROADS = 19,702 SF ADDITIONAL DRIVEWAYS 1,120 SF SIDEWALKS 3,493 SF TOTAL = 43,227 SF % IMPERVIOUS = 56.59% 57.00% (USE FOR DESIGN) USE A 4.0' DEEP POND WITH 90% TSS REMOVAL (SEE SAIDA CHART) SAIDA = 5.00% MIN. REQ'D SA @ PERMANENT POOL = 3819 SF SAREQU = (SAIDA)(DRAINAGE AREA) SA PROVIDED = 3850 SF MIN. REQ'D VOLUME Rv = 0.05 + 0.009(%IMP)= 0.56 VOLUME REQ'D = 3584 CF VOLREDYD = (1"112")(Rv)(DRAINAGE AREA) VOLUME PROVIDED = 4645 CF RECEIVED DEC 1 6 2005 BY: PROJECT NAME: EDEN BRIDGE SUBDIVISION DA-1 DA-2 DA-3 DA-4 PIPE1 (DA 4) PIPE2 (DA-4+3) PIPE3 (DA-4+3+2) PIPE4 (DA-4+3+2+1) PROJECT NUMBER: SHEET NUMBER CALCULATED BY: B APPROVED BY: Q. STORMDRAIN PIPE SIZING PM 858-22 Z of 5- MCMANNEN J ``� �•i O��SS•• •• !2 �I % r 10. SEAL r DRAINAGE AREA (SF) DRAINAGE AREA (AC) C I Q10 6655 0.15 0.85 7.23 0.94 9060 0.21 0.84 7.23 1.26 25281 0.58 0.63 7.23 2.64 36174 0.83 0.68 7.23 4.08 Q (CFS) PIPE PROPOSED % SLOPE Q PROPOSED PIPE FLOWING FULL (CFS) 4.08 18" RCP 0.30% 5.75 6.73 24" RCP 0.30% 12.39 7.99 24" RCP 0.30% 12.39 8.93 24" RCP 0.30% 12.39 PIPES (OVERFLOW OF POND)l 8.93 24" RCP 0.63% 17.95 13343 ' O : Q- �'• •''�•41GIN EE¢•°'��i .�. •••.....••' Q PERMANENT POOL VOLUME (method oer DWOI PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 3 of S CALCULATED BY: B. NICK rrrrrf��, !� [ o� APPROVED BY: • �" i1 I /0 y a SEAL 13343 - i Elevation Section SA SF Avg. SA I Ht. j FTJ Vol. , 13.20 Permanent pool 3850 b 2528 2.00 5057 11.20 Shelf 1207 731 2.00 1462 9.20 Bottom 255 Total Vol. 6519 FOREBAY VOLUME Elevation Section SA SF Avg. $A Ht FT Vol. CF 13.20 Permanent pool 787 434 3.00 1301 10.20 Bottom 81 Total Vol. 1301 Forebay % of Permanent Pool Volume = 19.96% MAIN BASIN VOLUME Elevation Section SA SF Avg. SA Ht. FT Vol. CF 13.20 Permanent pool 2875 1838 2.00 3675 11.20 Shelf 800 476 2.00 951 9.20 Bottom 151 Total Vol. 1 4626 Storage volume required 3584 CIF Elevation Section SA SF Avg. SA Ht F Vol. CF 13.20 Permanent pool 3850 4645 1.00 4645 14.20 Storage pool 5440 Total Vol. 4645 OVERFLOW DEVICE L_Q14'CwH112 Clio = 8.93 C„, = 3.0 (BROAD CRESTED WEIR) H = 1.00 L = 2.98 4 FT MINIMUM WEIR LENGTH •�;�'GIN�;.� •. e'e � \7 � �. •� „ '^"' �. 4,�• r. :t7 . r„ w - n v P � Jr DLO` �� ` � r_ { • �y PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER 4 of �— CALCULATED BY: B. MCCbAANNEN APPROVE SEDIMENT BASIN (PROPOSED POND DURING CONSTRUCTION) RIPRAP OUTLET PROTECTION (FOREBAY D Q10 % SLOPE I V FT1S 24" PIPE INTO POND 1 8.93 0.30 1 4.29 1 CLASS A 6'x6x1.5' orifice dia.= orifice area= Cd= time increment storage volume= overflow el.= perm. pool el.= ORIFICE SIZING 1 in. 0,0056 sf 0.6 120 minutes 3748 ft^3 14.2 13:2 PROJECT NAME: EDEN BRIDGE SUBDIVISION PROJECT NUMBER: PM 858-22 SHEET NUMBER ;;-Of Ns��u�ti CALCULATED BY: B. Q APPROVED BY: \� ..••... ��},¢� , _ , ,._ ,_ orifice eqn. = Q= (required 1 ") o: Fy ••+NEEQ' ••,t,Q Time Cumulative Cumulative Volume Height Flow Volume Volume Increment Time Time Initial Out Out Remaining (minutes) (minutes) (hours) (ft"3) (feet) (cfs) (cf) (ft"3) 0 0 3748.00 1.00 0.0262 0.00 3748.00 120 120 2 3748,00 1.00 0.0262 188.99 3559.01 120 240 4 35%01 0.95 0.0256 184.16 3374.85 120 360 6 3374,85 0.90 0.0249 179.33 3195.52 120 480 8 3195.52 0.85 0.0242 174.50 3021.01 120 600 10 3021,01 0.81 0.0236 169.67 2851.34 120 720 12 2851,34 0.76 0.0229 164.84 2686.50 120 840 14 2686.50 0.72 0.0222 160.00 2526.50 120 960 16 2526.50 0.67 0.0216 155.16 2371.34 120 1080 18 2371.34 0.63 0.0209 150.32 2221.01 120 1200 20 2221.01 0.59 0.0202 145.48 2075.53 120 1320 22 2075.53 0.55 0.0195 140.64 1934.09 120 1440 24 1934.89 0.52 0.0189 135.79 1799.10 120 1560 26 1799.10 0.48 0.0182 130,94 1668.17 120 1680 28 1668.17 0.45 0.0175 126,08 1542.08 120 1800 30 1542.08 0.41 0.0168 121.22 1420.86 120 1920 32 1420.86 0.38 0.0162 116.36 1304.50 120 2040 34 1304.50 0.35 0.0155 111.50 1193.00 120 2160 36 1193.00 0.32 0.0148 106.62 1086.38 120 2280 38 1086.38 0.29 0.0141 101.75 984.63 120 2400 40 984.63 0.26 0.0135 96.87 887.77 120 2520 42 887.77 0.24 0.0128 91.98 795.79 120 2640 44 795,79 0.21 0.0121 87.08 708.71 120 2760 46 708.71 0.19 0.0114 82.18 626.53 120 2880 48 626.53 0.17 0.0107 77.27 549.26 120 3000 50 549.26 0.15 0.0100 72.35 476.91 120 3120 52 476.91 0.13 0.0094 67.41 409.50 120 3240 54 409.50 0.11 0.0087 62.47 347.03 120 3360 56 347.03 0.09 0.0080 57.51 289,52 120 3480 58 289.52 0.08 0.0073 52.53 236.99 120 3600 60 236.99 0.06 0.0066 47.52 189.47 120 3720 62 189.47 0.05 0.0059 42.49 146.98 120 3840 64 146.98 0.04 0.0052 37.43 109.55 120 3960 66 109.55 0.03 0.0045 32.31 77.24 120 4080 68 77.24 0.02 0.0038 27.13 50.11 120 4200 70 50.11 0.01 0.0030 21.85 28.26 120 4320 72 28.26 0.01 0.0023 16.41 11.85 120 4440 74 11.85 0.00 0.0015 10.63 1.22 120 4560 76 1.22 0.00 0.0005 3.41 -2.19 11.16 DAYS