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Home My WebLink About19981125 Ver 1_Stormwater Info_20070921Transmittal ~~' '` 1~ Stantec Consulting Services Inc. 2127 Ayrsley Town Boulevard Ste. 300 Charlotte NC 28273 Tel: (704) 329-0900 Fax: (704) 329-0905 Stantec To: Annette Lucas Company: NCDENR-401 Wetlands Unit Address: 2321 Crabtree Blvd. Ste 250 Raleigh, NC 27604 Phone: Date: September 17, 2007 File: 73200237 Delivery: Fedex From: Claudia Prado PE ^ For Your Information ^ For Your Approval ^ For Your Review ^ As Requested RCIeI el l{ie. ~IQlielle~% SLV111111VQLe1 IYIa11Ql~~. elllell~° ~IYIr ~ 1 Attachment: Copies Doc Date Pages Description 1 09.17.2007 CD-Tiff of Calculations & Exhibits Ms. Lucas, please find enclosed the supporting data for the proposed revisions to the previously submitted and approved Blakeney Stormwater BMP#1. We would like to request a letter be forwarded to us permitting the grading of the pond as shown on the exhibit map. If you have any questions or comments please contact our office. STANTEC CON LTING SERVICES INC. ~-~~ CI udia Prado PE Civil Designer Tel: (980) 297-7659 Fax: (704) 329-0905 claudia.prado@stantec.com C. One Team.lnfinite Solutions. cp v:\1732\active\73200237\design\doc1237-tm-ncdenr-lucas-20070917.doc PROJECT CALCULATIONS BLAKENEY STORMWATER CHARLOTTE, NO CAROLINA '`~, G~ ~~~' V ,''mss SS~Q•0 ~ 's ~ ~ ~• O ~ e w <a SEAL 028405 a o Q.~.v <v ° ~~ = ~ 9, •. F~/GIN Q~ °io~ C ••....•••' ,!G `ate` Stantec Consulting 2127 Ayrsley Town Blvd. Suite 300 Charlotte, North Carolina 28273 (704) 329-0900 Stantec PROJECT N0.73200237 DATE: September 17, 2007 MANAGEMENT Project No. DWQ (to be provided by DWQ) DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET DWQ Stormwater Management Plan Review: A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin, design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project. I. PROJECT INFORMATION (please complete the following information): Project Name : ~1(k K~AlGY C ~2t~E21_Y L A M [~c--ti.t -1"ow-a C' Er~"~-2. Contact Person: ~t~Gh~~~ ~C!-~~`r ~'c, Phone Number: (1c~~ ~ 32q OgOc:~ For projects with multiple basins, specify which basin this worksheet applies to: Basin Bottom Elevation Jam- ~~o , O7 ft. (average elevation of the floor of the basin) Permanent Pool Elevation 'S~1 t7 . o O ft. (elevation of the orifice invert out) Temporary Pool Elevation 5q 2.25 ft. (elevation of the outlet structure invert in) Permanent Pool Surface Area 5y ~ J8~ sq. ft. (water surface area at permanent pool elevation) Drainage Area ~ ~ , 11 I ac. (on-site and off-site drainage to the basin) Impervious Area 35 , I ac. (on-site and off-site drainage to the basin) Permanent Pool Volume 2. ~4~,-~2,1o cu. ft. (combined volume of main basin and forebay) Temporary Pool Volume ~ 32.x'1 ~ q cu. ft. (volume detained on top of the permanent pool) Forebay Volume ~ 2,21 cu. ft. SA/DA used o~ . ~ ~ (surface area to drainage area ratio) Diameter of Orifice ~ in. (draw down orifice diameter) II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the Stormwater Best Management Practices manual (N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of why. ,--~ The temporary pool controls runoff from the 1 inch storm event. The basin length to width ratio is greater than 3:1. / The basin side slopes are no steeper than 3:1. ~ A submerged and vegetated perimeter shelf at less than 6:1 is provided. Vegetation to the permanent pool elevation is specified. An emergency drain is provided to drain the basin. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). The temporary pool draws down in 2 to 5 days. The forebay volume is approximately equal to 20% of the total basin volume. pediment storage is provided in the permanent pool. Access is provided for maintenance. ~ A minimum 30-foot vegetative filter is provided at the outlet. A site specific operation and maintenance (O&M) plan is provided. A vegetation management/mowing schedule is provided in the O&M plan. Semi-annual inspections are specified in the O&M plan. i A debris check is specified in the O&M plan to be performed after every storm event. A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan. A responsible party is designated in the O&M plan. FORM SW~ 100 09/97 Page 1 of 1 bmp#1 WET POND BMP (Basin # 1) ProjectNo.: 73200238 PROJECT: Blakeney (Formerly Landen Town Center) -CHARLOTTE, NC Designed by: CIP Checked by: RSK Date: 3-Apr-07 Pond Draiange Area = as.a1 Acres Impervious Percentage= 71.0 Impervious Area= 35.1 Acres Normal Pool Depth= a.o feet Normal Pool Side Slopes= 3:1 Normal Pool Surface Area /Drainage Area (%)= 2.44 Surface Area Required= 52,516.11 sq. ft. Normal Pool Volume= 162,216.14 cu. ft. Runoff Coefficient for 1" Storm= Rv=o.o5+o.oos(I> Rv= o.ss in.iin. Volume Required to Detain 1" Storm= (Design Rainfall) *(Rv)*(Drainage Area) Volume Required to Detain 1" Storm= 2.s4 ac. ft. Volume Required to Detain 1"Storm= 123,577.87 cu. ft. Volume Provided to Detain 1" Storm= 132,719.70 cu. ft. OUTLET STRUCTURES: Principle Discharge Orifice: °e^yuir ~d 1° StDrm ..°.elea~e Rate: 1" Storn Detention raleasa over 48 to 120 hours. 1" Storm Volume: z.a4 ac. ft. 48 Hour Release Rate: 0.72 cfs 120 Hour Release Rate: o.2s cfs Q= Discharge,cfs 0.72 A= Cross-section area of smallest section,ft^2 A,ft"2= 0.0943 g= Acceleration due to gravity, 32.2 ftlsec^2 32.2 Diameter-, in. 4.1581 H= Head on pipe, ft 2.25 Diameter-, in. 3.0 C=Discharge coefficient (0.61-0.65) 0.63 Use Diameter PVC pipe, in.: 3.0 A,ft^2= 0.05 Q= Discharge,cfs 0.37 Release Time, Hrs. 92 OK Dewatering Discharge Orifice: Required Dewatering Release Rate: Normal Pool dewatered in less tnan 2a Hours. 24 Hour Release Rate: 1.ss cfs 0= Discharge,cfs 1.88 A= Cross-section area of smallest section,ft^2 A,ft^2= 0.1857 g=Acceleration due to gravity, 32.2 ft/sec^2 32.2 Diameter-, in. 5.8347 H= Head on pipe, ft 4.00 Diameter-, in. 6.0 C= Discharge coefficient (0.61-0.65) 0.63 Use Diameter PVC pipe, in.: 6.0 A,ft^2= 0.20 Q= Discharge,cfs 1.99 Release Time, Hrs. 23 OK Principle Discharge Structures: Number of Discharge Risers: 1 Bottom of Basin Elevation: 586.00 Diameter of Princilpe Discharge: 3 in. Principle Discharge Elevation: 590.00 Size of Discharge Risers: 48"X48" Concrtet Box Top of Discharge Risers Elevation: 592.25 Diameter of Discharge Barrels: 36 in. Emergency Spillway Elevation : 593.50 Diameter of Dewatering Orifice : 6 in. Top of Dam Elevation : 595.00 73200237-storage2-20070402.x1s Page 1 9/17/2007 9:15 AM STORAGE#1 STAGE STORAGE (BASIN #1) Project No.: 73200238 PROJECT: Blakeney (Formerly Landen Town Center) -CHARLOTTE, NC Designed by: CIP Checked by: RSK FOREBAY A Permanent Pool Date: 3-Apr-07 ELEVATION AREA # STORAGE STORAGE CUMULATIVE CUMULATIVE (FT) (SF) (AC) (AC-FT) (CU FT) (AC-FT) (CU FT) 587 7,585.00 0.17 0.00 3,792.50 ~ 0.00 ~ 3,792.50 588 9,558.96 0.22 0.20 8,571.98: 0.20- 12,364.48 589 11,623.20 0.27 0.24 10,591.08 0.4-~ 22,955.56 590 13,770.94 0.32 0.29 12,697.07: 0.73 35,652.63 FOREBAY B Permanent Pool ELEVATION AREA AREA STORAGE STORAGE CUMULATIVE CUMULATIVE 587 1,216.16 0.03 0.00 608.08' 0.00 608.08 588 1,688.27 0.04 0.03 1,452.22 O.U3 2,060.30 589 2?30.90 0,05 0,04 1,959.59 o n;3 4,019.$$ 590 2,844.03 0.07 0.06 2,537.47' ~~."4' 6,557.35 WET BMP Permanent Pool ELEVATION AREA AREA STORAGE STORAGE (FT) (SF) (AC) (AC-FT) (CU FT) CUMULATIVE ~ CUMULATIVE 586 20,272.35 0.47 0.00 10136.18. O.uO~' 10,136.18 587 23,050.58 0.53 0.50 21,661.47- 0.5~~ 31,797.64 588 25,897.64 0.59 0.56 24,474.11 10~~, 56,271.75 589 31,798.20 0.73 0.66 28,847.92: 1.72. 85,119.67 590 37,974.79 0.87 0.80 34,886.50 2 52 120,006.17 COMPOSITE Temporary Pool ELEVATION AREA AREA STORAGE STORAGE (FT) (SF) (AC) (AC-FT) (CU FT) 590 54,589.76 1.25 0.00 CUMULATIVE ~ CUMULATIVE 591 58,705.46 1.35 1.30 56,647.61 ' `~ .:~(i 56,647.61 592 61,774.30 1.42 1.38 60,239.88' 2.68`- 116,887.49 593 64,883.39 1.49 1.45 63,328.85 4.14- 180,216.34 594 68,030.44 1.56 1.53 66,456.92' 5.66'. 246,673.25 SUMMARY: Provided: Required: Normal Pool Surface Area (Surface Area @ Elev. 590.00) 54,589.76 52,516.11 sq. ft. TOTAL Normal Pool (Volume below Elev. 590.00) 162,216.14 cu. ft. FORBAY Normal Pool (Volume below Elev. 590.00) 42,209.98 cu. ft. Forebay Percentage of Normal Pool 26.02 20.00 TOTAL Temporary Pool (Volume between Elev. 590 & 592.25) 132,719.70 123,577.87 cu. ft. 73200237-storage2-20070402.x1s Page 2 9/17/2007 9:15 AM forebays FOREBAYS (BASIN # 1) ProjectNo.: 73200238 PROJECT: Blakeney (Formerly Landen Town Center) -CHARLOTTE, NC Designed by: CIP Checked by: RSK Date: 3-Apr-07 FOREBAY A Pond Draiange Area = 4x.41 Acres Forebay A Draiange Area = 40.73 Acres Forebay 6 Draiange Area = s.ss Acres 49.41 Forebay A % of Total= o.s2 Forebay B % of Total= o.1s Forebay Volume Requirements: Total Forebay Volume Provided = 42,210 cu. ft. Forebay AVolume = 34,765 cu. ft. Foreba B Volume = 7,415 cu. ft. 73200237-storage2-20070402.x1s Page 3 9/17/2007 9:15 AM Multi-Stage-1 Sta e-Dischar e S reedsheet Project No.: 73200237 Use with multi-stage outlet devices Designed by: CIP PROJECT: Blakeney Heath -CHARLOTTE, NC Checked by: RSK SWcture: Basin # 1 Date: 14-Oct-05 Orifice Equation: O = CA(2gh)°'S CMSWDM EQ. 7.8 Broad-Crested Weir Equation: O = CL(H~'S) CMSWDM E0.7.4 Blue indicates input values Sharp-Crested Weir Equation: O = [3.27 +0.4(H/Hc)]LH~'S CMSWDM EO.7.1 For Structures that are not used; make area and length zero Outlet Number of Type # Equation Size Invert CL Orif. Area Coefficient Length Outlets Orifice 1 Orifice (in) 3 590.00 590.13 0.0491 0.60 N/A 1 Orifice 2 Orifice (in) 0.00 0.00 0.0000 0.60 N/A RISER 3 Weir (ft) 2.25 X 3.25 592.25 592.25 11.0000 - 11.00 1 ES 4 Weir (ft) 10 X 1 593.00 593.00 10.0000 3.00 10.OD 1 BARREL 5 Orifice (in) 36 586.00 587.50 7.0686 0.60 NIA 1 Note: Area of Weir is the product of the L x H Area of Orifice is Area of Circle based on the size in column D SQ SE Head (1) Head (2) Head (3) Head (4) Q (1) O (2) Q (3) Q (4) O (total) Q (Barrel) CHECK Elevation (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (cfs) (cfs) Elevation (cfs) 585.00 0.00 585.00 0.00 0.00 0.00 0.00 #DIV/D! 0.00 #DIVIO! 585.00 0.00 #DIV/0! 585.50 0.00 585.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV(0! 585,50 0.00 #DIV/0! 586.00 0.00 586.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV/0! 586.00 0.00 #DIV/0i 586.50 0.00 586.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV/D! 586.50 0.00 #DIV/0! 587.00 0.00 587.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV10! 587.00 0.00 #DIV/O! 587.50 0.00 587.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV/0! 587.50 0.00 #DIV/0! 588.00 0.00 588.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV10i 588.00 0.00 #DIVlOi 586.50 0.00 568.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIVIO! 588.50 0.00 #DIVlO! 589.00 0.00 589.00 0.00 0.00 0.00 0.00 #DIV/O! 0.00 #DIV(0! 589.00 0.00 #DIV/0! 589.50 0.00 589.50 0.00 0.00 0.00 0.00 #DIV/O! 0.00 #DIV/0! 589.50 0.00 #DIV/0! 590.00 0.00 590.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIVlO! 590.00 0,00 #DIV/0! 590.50 0.38 590.50 0.00 0.00 0.14 0.00 0.00 0.00 0.14 590.50 20,84 OK 591.00 0.88 591.00 0.00 0.00 0.22 0.00 0.00 0.00 0.22 591.00 31.84 OK 591.50 1.38 591.50 0.00 0.00 0.28 0.00 0.00 0.00 0.28 591.50 39.91 OK 592.00 1.88 592.00 0.00 0.00 0.32 0.00 0.00 0.00 0.32 592.00 46.60 OK 592.50 2.38 592.50 0.25 0.00 0.36 0.00 4.55 0.00 4.92 592.50 52.45 OK 593.00 2.88 593.00 0.75 0.00 0.40 0.00 24.11 0.00 24.51 593.00 57.71 OK 593.50 3.38 593.50 1.25 0.50 0.43 0.00 52.55 10.61 63.59 593.5D 62.53 OK 594.00 3.88 594.00 1.75 1.00 0.47 0.00 87.87 30.00 118.34 594.00 67.00 TRY AGAIN 594.50 4.38 594.50 2.25 1.50 0.49 0.00 129.04 55.11 184.64 594.5D 71.19 TRY AGAIN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV(0! O.DD 0.00 #DIVlOi 0.50 0.00 0.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIVI01 0,50 0.00 #DIV/0! 1.00 0.00 1.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIVIO! 1,00 0.00 #DIV/O! 1.50 0.00 1.50 0.00 0.00 0.00 0.00 #DIV/O! 0.00 #DIVlO! 1.50 0.00 #DIV/O! 2.00 0.00 2.00 0.00 0.00 0.00 0.00 #DIV/01 0.00 #DIV(O! 2.00 0.00 #D1V/0! 2.50 0.00 2.50 0.00 0.00 0.00 0.00 #DIV/O! 0.00 #DIV/O! 2.50 0.00 #DIV/O! 3.00 0.00 3.00 0.00 0.00 0.00 0.00 #DIV/O! 0.00 #DIV(0! 3.00 0.00 #DIV/O! 3.50 0.00 3.50 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV(0! 3.50 0.00 #DIVIO! 4.00 0.00 4.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIVIO! 4.00 0.00 #DIVIO! 4.50 0.00 4.50 0.00 0.00 0.00 0.00 #DIV/01 0.00 #DIVIO! 4.50 0.00 #DIV/0! 5.00 0.00 5.00 0.00 0.00 0.00 0.00 #DIV/0! 0.00 #DIV/0! 5,00 0.00 #DIV/O! 73200237-DETENTION-20051011.x1s Page 1 9/17/2007 12:53 PM xxx,~xxxxxxx~xx,.,~,.x_x___,._r_______________ * * * FLOOD HYDROGRAPH PACKAGE (HEC-1) * JUN 1998 * VERSION 4.1 * * RUN DATE 17SEP07 TIME 13:26:20 * ***************************************** X X XXXXX XX XXX XX X X X X X X XX X X X X X XXX XXXX XXXX X XXX XX X X X X X X X X X X X X X X XXXXX XX XXX XX XXX * * * U.S. ARMY CORPS OF ENGINEERS * HYDROLOGIC ENGINEERING CENTER * 609 SECOND STREET * DAVIS, CALIFORNIA 95616 * (916) 756-1104 * *rr*************a~*********************** THIS PROGRAM REPLACES ALL PREVIOUS VERSIONS OF HEC-1 KNOWN AS HEC1 (JAN 73), HECIGS, HECIDB, AND HECIKW. THE DEFINITIONS OF VARIABLES -RTIMP- AND -RTIOR- HAVE CHANGED FROM THOSE USED WITH THE 1973-STYLE INPUT STRUCTURE. THE DEFINITION OF -AMSKK- ON RM-CARD WAS CHANGED WITH REVISIONS DATED 28 SEP 81. THIS IS THE FORTRAN77 VERSION NEW OPTIONS: DAMBREAK OUTFLOW SUBMERGENCE SINGLE EVENT DAMAGE CALCULATION, DSS:WRITE STAGE FREQUENCY, DSS:READ TIME SERIES AT DESIRED CALCULATION INTERVAL LOSS RATE:GREEN AND AMPT INFILTRATION KINEMATIC WAVE: NEW FINITE DIFFERENCE ALGORITHM LINE ID.......1.......2.......3.......4.......5.......6.......7.......8.......9......10 1 ID 73200238 Blakeney Storm Mgmt Plan 2 ID 3 ID *~~~**+x+ ~+*****+x ~****~+x• 4 ID 5 ID Charlotte North Carolina 6 ID WET POND (BASIN 1) 7 ID STANTEC 8 ID 09/17/2007 9 IT 1 0 0 1000 10 IO 5 11 KK lOYEAR EVENT 12 KM 10 YEAR 6 HOUR RAINFALL 13 KO 0 0 0 0 21 14 PB 3.72 15 IN 5 16 PI 0 .011 .Oll .Oll .012 .012 .012 .013 .013 .013 17 PI .014 .014 .015 .015 .016 .016 .017 .018 .018 .023 18 PI .024 .025 .026 .027 .029 .036 .039 .042 .045 .049 19 PI .054 .079 .089 .103 .161 .201 .395 .590 .275 .177 20 PI .112 .095 .084 .057 .051 .047 .043 .040 .038 .030 21 PI .028 .027 .025 .024 .023 .019 .018 .017 .017 .016 22 PI .016 .015 .015 .014 .014 .013 .013 .012 .012 .012 23 PI .011 .011 .011 0.0 24 KO 0 0 0 0 21 25 BA 0.0772 26 LS 0 73.52 27 UD .1000 28 KK l0YRB1ROUTED lO YR STORM EVENT BASIN #1 29 KM COMPUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED THROUGH DETENTION BASIN 30 KO 0 0 0 0 21 31 RS 1 ELEV 590.00 32 SV 0.0 0.89 1.97 3.18 4.51 33 SE 590.0 591.0 592.0 593.0 594.0 34 SQ 0 0.14 0.32 4.92 24.51 63.59 118.34 35 SE 590.0 591.0 592.0 592.50 593.0 593.5 594.0 36 KK 50 YEAR EVENT 37 KM 50 YEAR 6 HOUR RAINFALL 38 KO 0 0 0 0 21 39 PB 4.92 40 IN 5 41 PI 0 .016 .016 .016 .017 .018 .018 .019 .019 .019 42 PI .020 .020 .021 .022 .022 .023 .024 .025 .026 .031 43 PI .032 .034 .035 .037 .039 .050 .053 .056 .061 .066 44 PI .073 .103 .116 .134 .208 .259 .508 .750 .354 .229 45 PI .146 .124 .109 .077 .069 .063 .059 .055 .051 .040 46 PI .038 .036 .034 .033 .031 .026 .025 .024 .024 .023 47 PI .022 .021 .021 .020 .020 .019 .019 .016 .018 .017 48 PI .017 .016 .016 0.0 49 KO 0 0 0 0 21 50 BA 0.0772 51 LS 0 73.52 52 UD .1000 LINE ID .......1 .......2 .......3.......4 .......5.......6.......7.......8.......9......10 53 KK 50YRB1ROUTED S OYR STORM EVENT BASIN #1 54 KM COMPUTE HYDROGRAPH FOR POST-DEVELOPMENT ROUTED THROUGH DETENTION BASIN 55 KO 0 0 0 0 21 56 RS 1 ELEV 590.00 57 SV 0.0 0.89 1.97 3.18 4.51 58 SE 590.0 591.0 592.0 593.0 594.0 59 SQ 0 0.14 0.32 4.92 24.51 63.59 118.34 60 SE 590.0 591.0 592.0 592.50 593.0 593.5 594.0 61 ZZ * * FLOOD HYDROGRAPH PACKAGE (HEC-1) * JUN 1998 * VERSION 4.1 * * RUN DATE 17SEP07 TIME 13:26:20 * ***************************************** 73200238 Blakeney Storm Mgmt Plan *************************** Charlotte North Carolina WET POND (BASIN 1) STANTEC 09/17/2007 10 IO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IT HYDROGRAPH TIME DATA NMIN 1 MINUTES IN COMPUTATION INTERVAL IDATE 1 0 STARTING DATE ITIME 0000 STARTING TIME NQ 1000 NUMBER OF HYDROGRAPH ORDINATES NDDATE 1 0 ENDING DATE NDTIME 1639 ENDING TIME KENT 19 CENTURY MARK COMPUTATION INTERVAL .02 HOURS TOTAL TIME BASE 16.65 HOURS ENGLISH UNITS DRAINAGE AREA SQUARE MILES PRECIPITATION DEPTH INCHES LENGTH, ELEVATION FEET FLOW CUBIC FEET PER SECOND STORAGE VOLUME ACRE-FEET SURFACE AREA ACRES TEMPERATURE DEGREES FAHRENHEIT * * * U.S. ARMY CORPS OF ENGINEERS * HYDROLOGIC ENGINEERING CENTER * 609 SECOND STREET * DAVIS, CALIFORNIA 95616 * (916) 756-1104 * *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ************** * * 11 KK * lOYEAR * EVENT * * ************** 13 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED TIMINT .017 TIME INTERVAL IN HOURS *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** **x *** *** x** **: *** *** *** *** ************** * * 11 M 1~lntuc - rev ru~i ************** 24 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAVl 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED TIMINT .017 TIME INTERVAL IN HOURS * * 28 KK * l0YRB1 * ROUTED lOYR STORM EVENT BASIN #1 * * ************** 30 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED TIMINT .017 TIME INTERVAL IN HOURS *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** * 36 KK * 50 YEA * R EVENT * * ************** 38 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED TIMINT .017 TIME INTERVAL IN HOURS *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ************** * * 36 KK * 50 YEA * R EVENT * * ************** 49 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAVl 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED '1'1M1N"1" .V1/ 11CIE ttV1G1GVHL 11v nVVacJ *** **t *** +t t it *~F* *** *~F* *~k* *** **!~ t** **+t *** **~* *ir* *** *:k* *** *ir i~ *** **:t *** 'k*t *** *ir :t is** *** ie** **t *** *** *** **:t *****1~t***~F**1~ * * 53 KK * SOYRBl * * * ************** ROUTED 50YR STORM EVENT BASIN #1 55 KO OUTPUT CONTROL VARIABLES IPRNT 5 PRINT CONTROL IPLOT 0 PLOT CONTROL QSCAL 0. HYDROGRAPH PLOT SCALE IPNCH 0 PUNCH COMPUTED HYDROGRAPH IOUT 21 SAVE HYDROGRAPH ON THIS UNIT ISAV1 1 FIRST ORDINATE PUNCHED OR SAVED ISAV2 1000 LAST ORDINATE PUNCHED OR SAVED TIMINT .017 TIME INTERVAL IN HOURS PEAK OPERATION STATION FLOW HYDROGRAPH AT lOYEAR 118 ROUTED TO l0YRB1 25 HYDROGRAPH AT 50 YEA 193 ROUTED TO 50YRB1 83 RUNOFF SUMMARY FLOW IN CUBIC FEET PER SECOND TIME IN HOURS, AREA IN SQUARE MILES TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD PEAK 6-HOUR 24-HOUR 72-HOUR 3.25 11. 4. 4. 3.73 7. 3. 3. 3.23 19. 7. 7. 3.47 15. 5. 5. BASIN MAXIMUM TIME OF AREA STAGE MAX STAGE .OS .08 593.00 3.73 .OB .OB 593.68 3.47 *** NORMAL END OF HEC-1 *** m w x v, J z 0 V:\1732\active\73200237\_LD\dwg\73200237_grad-20D51011.dwg AucusT, 2007 2005-10-24 0 :18PM By: cprado 73200237 Notes Client/Project Stantec Consulting Services Inc. BLAKENEY HEATH ~,~~~`' ~ , 2127 Ayrsley Town Blvd. Ste 300 s ~~ ~~~ Charlotte NC U.S.A. C~'_ ~ k,.;'%? ` 28273 Tel. 704.329.0900 $'~71'1~C Fax, 704.329.0905 www,stantec.cam 0 400' 600' 800' 1 "=400' ~^ ^ ^ ^ LIMITED PARTNERSHIP Figure No. 1.0 Title BMP DRAINAGE AREA MAP N(ITFS BEST MANAGEMENT PRACTICES PLANTING DETAILS ARREL NO PLANTING MATERIAL WITHIN nrrF~~ ~ 1. WETLAND PLANT SPECIFICATIONS H.A.R.P. SELECTION AND PLANTING GUIDE FOR AQUATICAND WETLAND PLANTS IN THE PIEDMONT REGIONOF NORTH CAROLINA. 2. BENCHMARK AND CLEANOUT DEPTH REFERENCED ON PLAN FOR FOREBAY. POND #1 PLANTING SCHEDULE KEY SPECIES (SPACING)* SIZE LITTORAL SHELF 1 SOFT RUSH (1.0') 1 GAL 2 SWEETFLAG 2.0' 1 GAL 3 BLUE FLAG IRIS 1.0' 1 GAL 4 YELLOW IRIS 2.0' 1 GAL * SPACING REQUIREMENTS AND NUMBER OF PLANTS NEEDED FOR UNIFORM COVER IN 1 YEAR m Z x z 0 ABBREVIATIONS LIST: GAL=GALLON POT OT=QUART POT LG BR=LARGE, BARE-ROOT V:\1732\active\73200237\_LD\dwg\73200237_grad-20051011,dwg AUGUST 2007 2005-10-24 D ;18PM Bv: cprado 73200237 Notes Client/Project Stantec Consulting Services Inc. BLAKENEY HEATH ~L ' ,,~/ ~ 2127 Ayrsley Town Blvd, Ste 300 LIMITED PARTNERSHIP ~~~,a'~ Charlotte NC U.S.A. ~~ `'~ '~`3 28273 Tel. 704.329.0900 ~~ Fax, 704.329.0905 www.stantec.com a 400' soo' 800' 1 "=400' ~~~~~, Figure No. z.o Title BMP PLANTING DETAIL