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Home My WebLink About2004-02-05 Revised Stormwater Report 11/26/03 Transportation ,;:•��,� Land Development Environmental Services DES, 02 NO,") 1 101 Walnut Street VaYlCir,�,Se Hangen Rrurtlin, Tnc. �7i_A�viVs D 1"Art�i,,I�_r4 P.O. ox4151 Watertown,MA 02471-9151 617 924 1770 FAX 617 924 2286 Memorandum To: North Andover Planning Board pate: November 26,2003 Town of North Andover 27 Charles Street North Andover,MA 01845 Project No.: 08354.00 From: Jon Stephenson,P.E. Re: Eaglewood Shops Retail Development Stormwater Management System Revisions Vanasse Hangen Brustlin,Inc. (VHB)has prepared this memorandum to detail changes made to the stormwater management system at the proposed Eagiewood Shops Retail Development,in response to Site Plan Review comments prepared by MHF Design Consultants,Inc.and dated November 12, 2003.This memorandum is to supplement the Drainage and Stormwater Quality Report prepared by VHB and dated September 2003 and revised October 2003. The proposed building program has not changed since the last filing of Site Plans made on October 28,2003.Minor grading changes have been made,and catch basins and other drainage structures have been added to satisfy the comments of the peer reviewer.An updated Grading,Drainage and Erosion Control Plan Sheet C-3 is included as Attachment A. Hydrologic Analysis The hydrologic analysis has been modified to reflect changes in the proposed detention/infiltration basin described in the above-mentioned report.The design is no longer accounting for infiltration in the proposed basin.The infiltration requirement will be satisfied with the use of StormtechTM infiltrating chambers(see Attachment B).The proposed detention basin,however,accounts for a "worst-case"scenario in which soils are saturated and flow through the chambers does not infiltrate, but enters the detention basin. The proposed detention basin has been designed to treat the first-flush requirement of 0.5 inches over the impervious area contributing to the pond.However,the roofs of proposed Retail 2 and Retail 3,and the driveway in the back of these buildings,were not included in the water quality volume.The roof runoff is considered"clean"and the pavement is being treated in StormceptorT114 water quality units, therefore runoff from these areas do not require treatment.Runoff volume from the roof of Retail 1 was also excluded from water quality volume calculations.The detention basin outlet structure was designed so that the water quality volume would be held under the low-flow outlet.There will be a gravel trench with a flinch perforated pipe at the bottom of the detention basin to ensure that the basin will drain down effectively over time. The proposed system has been designed so that there is no increase in peak rates of runoff between pre-and post-development conditions for the 1-,2-, 10-,25-and 100-year storm events.Rainfall volumes used for this analysis were 2.9,3.1,4.5,5.4 and 6.3 inches respectively.Table 1 summarizes the existing and proposed conditions peak discharge rates.Overall drainage patterns and drainage areas have not changed since the prior submission.HydroCAD printouts for existing and proposed conditions are included as Attachment C. \\\08354\dots\memos\mem"8354-stormwater rev]12603 i I Transportation Land Development Environmental S e r v i c e s 1 DF G U 2 200 l 101 Wallnit Street ! Vanasse Fla)nQen Brustlin, Inc,. P.o.Box 9151 NO�i rl l AI\JD .V1.Wkerto�vll,MA 02471-9151 PLANNING DEEM I VMj .;:f 617 924 1770 FAX 617 924 2286 Transmittal To: Heidi Griffin Date: November 25, 2003 Town of North Andover Community Development&Services Director 27 Charles Street North Andover,MA 01845 Project No.: 08354.00 i From: jon D.Stephenson,P.E. nt: Eaglewood Shops Site Plan Review Resubmission Heidi, The attached arzforxnation is being re-submitted to you on behalf of Eaglewood Properties, LLC site plait submission application: 1) Response to MHF Peer Review Comments of November 12,2003 2) Response to email.from Heidi Griffin,dated October 27,2003 3) Response to memo from Heidi Griffin,dated November 13,2003 } 4) Revised Site Plans (dated 11/26/03) I 5) Zoning Decision j 6) Recorded Restrictive Covenants 7) Landscape Zoning Compliance Memo 8) Summary of Coordination with adjacent Pulte Site E 1 9) Revised Hydrologic Memo 10) Traffic Response Memo CC; Karl R. Dubay MHF Design Consultants, Inc. 103 Stiles Road Suite One Salem, NH 03079 Lisa D. Eggleston, P.E. Eggleston Environmental 55 Old Coach Road Sudbury, MA 01776 (Plus Drainage and Stormwater Quality Report dated October 2003) North Andover Conservation Commission \\\08354\dots\Transmittals\Tl_HGriflln_l1_26_03.doc i,, f f ii !I I Date: November 25,2003 2 Project No.: 08354,00 (Plus Drainage and Stormwater Quality Report dated October 2003) i I j \\\03354\does\Tr.-msmHtals\TR_HGrifEtn_l1_26_01doe i I I 'i I i a i Date: November 24,2003 2 Project No.: 08354,00 Table 1:Peak Discharge Rates(cfs) Design Point 1-Year 2-Year 10-Year 25-Year 100-Year Design Point 1:Wetlands Existing 34 64,2 10.9 16.0 21.5 Proposed 3.0 3.7 10.5 13.8 21.0 Hydraulic Analysis The closed drainage system was designed for a 25-year storm event.Minor revisions were made to the closed drainage system since the last submission,which include the addition of catch basin structures and adjustments to pipe runs.Revised hydraulic calculations are included as Attachment D. Stormwater Quality The proposed detention basin was designed to treat the first 0.5 inches of rainfall,as described above. A Stormceptor unit has also been proposed for the site to treat the pavement adjacent to the Retail 2 and Retail 3 buildings,prior to discharge into the detention basin.All other paved areas will be discharged into the sediment forebay for treatment,prior to entering the storage area of the basin. The sediment forebay was designed to treat 0.1 inches of runoff per Massachusetts Stormwater Management Policy.Total suspended solids(TSS) removal for the site is greater than 80%,which meets the requirements of the Massachusetts Stormwater Management Policy.TSS removal calculations and water quality volume calculations are included as Attachement E. i \\\083W\dots\memos\memo-06357-stormwater rev112603 Attachment A. Grading, Drainage and Erosion Control Plan \\\08353\dots\memos\memo-03353•stormwater rev112603 Attachment B. Infiltration Calculations \\\OM\docs\memos\memo-M54-stormwater rev112603 VHB Infiltration VolumeCalculations Project Name: Eaglewood Shops Retail Proj. No.: 8354.0 Project Location: North Andover, MA Date: 11/26/2003 Calculated by: CEC Proposed Impervious Surface Summary Net Proposed Impervious Areas by Hydrologic Soil Group(HSG) in acres Subcatchment HSG A HSG B MSG C HSG D Total Area 1 A 2.68 2.73 5.41 113 0.31 1.18 1.49 1 C 0.29 0.29 1 D L I I I 1 0.00 TOTAL, 0.00 2.99 4.20 0.00 7.19 Required Infiltration Volume (Cubic Feet) HSG Area Recharge Depth Volume (acres) (in.) c.f.) A 0.0 0.40 0 B 3.0 0.25 2,713 C 4.2 0.10 1,525 D 0.0 0.00 0 TOTAL 4,238 Assumptions: 1. Massachusetts DEP Infiltration requirement:HSG A=0.4 In;HSG B=0.25 in;HSG C=0.1 In;HSG D=0 In. Provided Infiltration Volume (Cubic Feet) Infiltration Volume Provided in Stormtech Infiltrating Chambers-See Attached Sheet 60 Chambers 4,494 0. VHBComputations Project Project# Location 0, Sheet I of � Calculated by Date Checked by Date ��Title � T � '� � r 4 dr �� Vanasse Hangen Brustlin,Inc. ® Printed on Recycled Paper Attachment C: HydroCAD Analysis \\\D3354\does\memos\memo-09354-stormwaier rev]]2603 i Existing Conditions 1-9 2-, 10-, 25-1 100-Year Storm Events \\\0835A\dots\memos\memo-08354-siorm%vater rev112603 EX-1 B EX- 1 A EX-2 EX-1 1 R Design Point 1 SubGat Roach Pon ICI�t Drainage Diagram for 8354-ex Prepared by{enter your company name here} 11/25/2003 WydroGADO 7.00 sin 001234 0 1886-2003 Applied Microcomputer Systems 8354-ex Type 11124-hr i YR Rainfall=2.90" Prepared by {enter your company name here} Page 2 N droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subeatchment EX-1A: EX-1 Runoff Area=10.320 ac Runoff Depth=0.58" Flow Length=1,459' Tc=32.5 min CN=68 Runoff=3.10 cfs 0.495 of Subcatchment EX-1 B: EX-2 Runoff Area=1.960 ac Runoff Depth=0.33" Flow Length=826' Tc=23.9 min CN=61 Runoff=0.28 cfs 0.054 of Reach 1 R: Design Point 1 Inflow=3.38 cfs 0.549 of Outflow=3.38 cfs 0.549 of Total Runoff Area= 12.280 ac Runoff Volume =0.549 of Average Runoff Depth =0.54" 8354-ex Type 11124-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here} Page 3 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-1A: EX-1 Runoff = 3.10 cfs @ 12.53 hrs, Volume= 0.495 af, Depth= 0.58" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type lil 24-hr 1YR Rainfall=2.90" Area (ac) CN Description _ 6.135 70 Good Woods Group C 3.020 55 Good Woods Group B 0.695 98 Impervious 0.470 74 Good Grass Group C 10.320 68 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 9.5 50 0.0400 0.1 Sheet Plow, Woods: Eight underbrush n=0.400 P2= 3.10" 1.8 82 0.0240 0.8 Shallow Concentrated Plow, Woodland Kv= 5.0 fps 12.5 767 0.0420 1.0 Shallow Concentrated Plow, Woodland Kv=5.0 fps 2.5 237 0.1000 1.6 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 323 0.0300 0.9 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 32.5 1,459 Total 8354-ex Type I1124-hr 1YR Rainfalf-2.90" Prepared by {enter your company name here) Page 4 HydroCA©@ 7.00 sh 001234 O 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-1 A: EX-1 Hydrograph 3.10 cfs a i —Runoff € I ir TYpe..11f 24=h- TYR Runoff Area-10.320 ac 1 S I I - N 2_ RUno f'Volume=;0:4$5'af I i Runoff Depth=0.58" I Flow Length=1 ,459' ZE 3 € i c jn ` I i 1 I I € 0 1 2 3 4 5 6 7 8 9 110 1{i i 2 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-ex Type I/124-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here) Page 5 H droCAD@ 7.00 s/n 001234 @ 1986-2003 Ap flied Microcomputer Systems 11/25/2003 Subcatchment EX-1 B: EX-2 Runoff = 0.28 cfs @ 12.51 hrs, Volume= 0,054 af, Depth= 0.33". Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30,00 hrs, dt=0.01 hrs Type 111 24-hr 1YR Rainfall=2,9011 Area (ac) CN Description - 1.300 55 Good Woods Group B 0.120 98 Impervious 0.280 74 Good Grass Group C 0.260 61 Good Grass Group B 1.960 61 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft) (ftlsec) (cfs 12.5 50 0.0200 0.1 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.10" 5.2 310 0.0390 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 466 0.0620 1.2 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 23.9 826 Total Subcatchment EX-1 B: EX-2 Hydrograph i t I I ! 0.26= ; -;- , Type III 24-hr-1 YR- t I I 1 E I I I I S 1 1 1 I I E I 0,24- -- _{_ _-l--*- - - - - -- ..Ra'�nfa;ll 2:9,0"--I . 0.22 --..Ruinoff Arew-1.9 VO—cIC 0.2 - { f O 0� ti 0.,0. --- --- IW W -,--. - ; Runoff olumo�, 4; f Runoff, p_ De th�0'.33 , y -_+_ 0.14 - -- _ _ Flow, L'.ehdtll-.;826'.... } in LL pp E I I I 1 3 t • a : ? i i 3 1 I '. VOM j , 0'04.. --- - - - --- - 0.02- 3 0-0.. '. ..2...3...4....�. .. ..7...g...9 10 .... 3l2 13 14 15 16 ;57 18 f9 0.. 1..22,.2 . '. .:........... . . ... 3 24 25 28 27 28 29 30 Time (hours) 8354-ex Type Ill 24-hr 1 YR Rainfall=2.90" Prepared by {enter your company name here) Page 6 H droCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 [401 Hint; Not Described (Outflow=Inflow) Inflow Area = 12.280 ac, Inflow Depth = 0.54" for 1 YR event Inflow = 3.38 cfs @ 12.53 hrs, Volume= 0.549 of Outflow - 3.38 cfs Q 12.53 hrs, Volume= 0.549 af, Atten=0%, I_ag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph 3.38 cfs —Inflow L - Outflow ' I Inflow Area="l 2280 ac I ! 3 ' 1' --. - I --I--I -- ---- I I - -' -- -- t t c M ,. . .. . .L o 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 26 27 28 29 30 Time (hours). 8354-ex Type 11124-hr 2YR Rainfa11=3.1O" Prepared by {enter your company name here} Page 7 H droCAD®7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment EX-1 A: EX-1 Runoff Area=10.320 ac Runoff Depth=0.68" Flow Length=1,459' Tc=32.5 min CN=68 Runoff=3.80 cfs 0.584 of Subcatchment EX-1 B: EX-2 Runoff Area=1.960 ac Runoff Depth=0.40" Flow Length=826' Tc=23.9 min CN=61 Runoff=0.37 cfs 0.066 of Reach 1R: Design Point 1 inflow-4.17 cfs 0.650 of Outflow=4.17 cfs 0.650 of Total Runoff Area= 12.280 ac Runoff Volume 0.650 of Average Runoff Depth = 0.64" i 8354-ex Type III 24-hr 2YR Rainfall=3.10" Prepared by {enter your company name here} Page 8 H droCAD®7.00 s/n 001234 @ 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-M EX-1 Runoff = 3.80 cfs @ 12.53 hrs, Volume= 0.584 af, Depth= 0.68" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area (ac) CN Description_ 6.135 70 Good Woods Group C 3.020 55 Good Woods Group B 0.695 98 Impervious 0.470 74 Good Grass Group C 10.320 68 Weighted Average _ Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9,5 50 0.0400 0.1 Sheet Flow, Woods: Light underbrush n=0.400 P2=3.10" 1.8 82 0.0240 0.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.5 767 0.0420 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.5 237 0.1000 1.6 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 323 0.0300 0.9 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 32.5 1,459 Total $354-ex Type I1I 24-hr 2YR Rainfall=3.10" Prepared by {enter your company name here} Page 9 H droCA©®7.00 sln 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-1 A: EX-1 Hydrograph CIS i ' Type 111 24-fir 12YR E Rainfall 3JO'? Runoff Area=1 0.320 ac , III } Runoff Volume=0.58tof Runoff-Depth4.68"- LL Flow Length=1 ,459' Tc=32'5;min 1- -- - _ - - --T --r-- CN=68- r 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 B 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-ex Type 11124-hr 2YR Rainfall=3.10" Prepared by (enter your company name here) Page 10 HydroCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-1 B: EX-2 Runoff -- 0.37 cfs Q 12.48 hrs, Volume= 0.066 af, Depth= 0.40" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area (ac) CN Description_ _ 1.300 55 Good Woods Group B 0.120 98 Impervious 0.280 74 Good Grass Group C 0.260 61 Good Grass Group B 1.960 61 Weighted Average Te Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) _ 12.5 50 0.0200 0.1 Sheet Flow, Woods: Light underbrush n=0.400 P2= 3.1011 5.2 310 0.0390 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 466 0.0620 1.2 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 23.9 826 Total Subcatchment EX-1 B: EX-2 Hydrograph 0.4 -- --'- --- -- _ } _ 3 0.37 cfs RunolF Type 111-24=hf_2YR_._ 0.34 # 0.28= Runoff, Arew=1 960--ac 0.26 0.24_ -£ :--} F _ - } Rulrlo f Volurjnl0=0:066'-a _. v _ -_ _-____t 0 0.2 Runoff Depth-1-0.40" 0.16_ --- . - -,-;- -- . - - - ,. FIow�Le>�gt1 �826' -r i T n 0.as- --- -- -- - - - - -- --€ . E_.... 0.04: 0.02 0- ,. . . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-ex Type 11124-hr 2YR Ralnfall-3.10" Prepared by (enter your company name here) Page 11 H droCADO 7.00 sln 001234 0 1986-2003 Applied microcomputer Systems 11/25/2003 Reach 1 R. Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area - 12.280 ac, Inflow Depth = 0.64" for 2YR event Inflow 4.17 cfs Q 12.53 hrs, Volume= 0.650 of Outflow = 4.17 cfs @ 12.53 hrs, Volume= 0.650 af, Atton=0%, Lag=0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph 4.17 cis —Inflow i 1 —Oulifaw 4 - Inflow Area-1 12 280 ac { E _ E I ILL 2- 1 v' ....f•...1....1. /•�� ....,. �.. , • • •••. .,.•.•I .. ,•..• .. .+. .:..;..• k.., 1 ...1• •.,.•..... ..•. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 16 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-ex Type 11124-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 12 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems11/25/2003 Time span=0.00-30,00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment EX-1 A: EX-1 Runoff Area=10.320 ac Runoff Depth=1,53" Flow Length=1,459' Tc=32.5 min CN=68 Runoff=9.64 cfs 1.318 of Subcatchment EX-1 B: EX-2 Runoff Area=1.960 ac Runoff Depth=1.08" Flow Length=826' Tc=23.9 min CN=61 Runoff=1.35 cfs 0.176 of Reach 1 R: Design Point 1 Inflow=10.91 cfs 1.494 of Outflow=10.91 cfs 1.494 of Total Runoff Area= 12.280 ac Runoff Volume= 1.494 of Average Runoff Depth = 1.46" 8354-ex Type 1//24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 13 H droCADO7.00 s/n 001234 O 1986-2003 Apelled Microcomputer Systems 11/25/2003 Subcatchment EX-1 A; EX-1 Runoff = 9.64 cfs Q 12.49 hrs, Volume= 1.318 af, Depth= 1.53" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area ac CN Description 6.135 70 Good Woods Group C 3.020 55 Good Woods Group B 0.695 98 Impervious 0.470 74 Good Grass Group C 10.320 68 Weighted Average To Length Slope Velocity Capacity Description rein feet ft/ft ft/sec cfs 9.5 50 0.0400 0.1 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.10" 1.8 82 0.0240 0.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.5 767 0.0420 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.5 237 0.1000 1.6 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 323 0.0300 0.9 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 32.5 1,459 Total 8354-ex Type 11124-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 14 ydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EXIA: EX-1 Hydrograph 10 9.64 cis —Runoff 9- _ --Type. 111 24-hr: 10YR E 6- -=-- - ----i- - R it fa11=4.50"- 7 -- - - --- - - -- -Runoff-Area-1 0.320-ac 1 , f'V o m --. - - -- Runof . 1'u e.-,1-.31.8-af_ . 0 5 --.- _ ' Runoff. Depth, lt.53' _ _iow Length^1459` 4- - Tc'=32.5 min 3- CN=68 .:.: ...I. .. ., ....i. -.:.. E.,..E....E... I. E.............wIwrw^7^f`.r-'S: ^.P�+......w^4:..� ..!....... .... ...E_ E.... 0 1 2 3 4 5 B 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i 8354-ex Type/1/24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 15 H droCADO7.00 s/n 001234 O 1986-2003 A plied Microcomputer Systems 11/25/2003 Subcatchment EX-1 B: EX-2 Runoff — 1.35 cfs @ 12.39 hrs, Volume= 0,176 af, Depth= 1.08" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 1.300 55 Good Woods Group B 0.120 98 Impervious 0.280 74 Good Grass Group C 0.260 61 Good Grass Group B 1.960 61 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft) (ft/sec) (cfs 12.5 50 0.0200 0.1 Sheet Flow, Woods: Light underbrush n=0.400 P2= 3,10" 5.2 310 0.0390 1.0 Shallow Concentrated Flow, Woodland Kv=5.0 fps 6.2 466 0.0620 1.2 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 23.9 826 Total Subcatchment EX-1 B: EX-2 Hydrograph f s —Runoff k TYpe 111,24-hr. 1 OYR , ! 1 E E Ra nfc11=4.5.0" Runoff Area=1 ,960 ac Runoff Volume^0.176 at I 1 t Runoff Depth=13.0811 1 l I E Flow Length=`826' 3 TC=23.9:mill CN=61 { I } : F 1 i ./-1....,. ..{............ ...............f ...i....,....f....�.!!!�,R!:,....�....irr.!�!'T ... .....i .,...., .. f �:.f....,2S.. 27{....,....f.. . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 29 30 Time (hours) 8354-ex Type ///24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here) Page 16 HydroCADO 7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 (40) Hint: Not Described (Outflow=Inflow) Inflow Area 12.280 ac, Inflow Depth = 1.46" for 10YR event Inflow = 10.91 cfs @ 12.46 hrs, Volume= 1.494 of Outflow - 10.91 cfs @ 12.46 hrs, Volume= 1.494 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph E 10.91 cfs —Inilow Outflow 10- lnflow 'Aroa-i 2,280 aC - E 1 F € S F 4- -1 - - - o- 0 1 2 3 4 5 6 7 6 9 10 11 12 1$ 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-ex Type 11124-hr 25YR Ralnfa11=5.40" Prepared by (enter your company name here) Page 17 !sydroCADO7 00 s/n 001234 ©1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Star-Ind method Subcatchment EX-1 A: EX-1 Runoff Area=10.320 ac Runoff Depth=2.17" Flow Length=1,459' Tc=32.5 min CN=68 Runoff=14.00 cfs 1,866 of Subcatchment EX-1 B: EX-2 Runoff Area=1.960 ac Runoff Depth=1.62" Flow Length=826' Tc=23.9 min CN=61 Runoff=2.15 cfs 0.264 of Reach 1 R: Design Point 1 Inflow=16.00 cfs 2.129 of Outflow=16.00 cfs 2.129 of Total Runoff Area 12.280 ac Runoff Volume 2.129 of Average Runoff Depth =2.08" 8354-ex Type ili 24-hr 25YR Rainfaf=5.40" Prepared by tenter your company name here} Page 18 H droCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/26/2003 Subcatchment EMA: EX-1 Runoff 14.00 cfs @ 12.46 hrs, Volume= 1.866 af, Depth= 2.17" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area(ac) CN Description 6.135 70 Good Woods Group C 3.020 55 Good Woods Group B 0.695. 98 Impervious 0.470 74 Good Grass Groue C 10.320 68 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.5 50 0.0400 0.1 Sheet Flow, ^ Woods: Light underbrush n=0.400 P2= 3.10" 1.8 82 0.0240 0.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.5 767 0.0420 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.5 237 0.1000 1.6 Shallow Concentrated Flow, Woodland Kv=5.0 fps 6.2 323 0.0300 0.9 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 32.5 1,459 Total I I 8354-ex Type 111 24-hr.25YR Rainfall=5.40" Prepared by (eater your company name Mere) Page 19 H droCAD®7.00 s/n 001234 O 1986-2003 Applied Microcom uter 5 stems 11/25/2003 Subcatchment EMA: EX-1 Hydrograph 15- 14,00 cfs { I -..,. - Type 111;24-hr 25YR- E 12- : Ralinfa11=5.4.0" 10, E W _Runoff Area ;10.32..0 ac. I E I Runoff VbWm., a=;1 ,866 of 6_ - - --- -- - Rurioff' Depth=2:17'.- j` 6- Flow Length=1459' - - =- Tc=32;5 min_ E f icyN-68 A 4 C - I : .f. ..,... ,....I -I ...I....;.... ..:. ....j....w. .�r.r�rrw'.'l^EMI...,i�'�'�•.�.•.�'�^11.1�'-�.:-.Z.. .I. ,. .::. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2B 29 30 Time (hours) 8354-ex Type III 24-hr 25YR Rainfaff=5.40" Prepared by {enter your company name here} Page 20 HydroCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 1_1_/25/2003 Subcatchment EX-1 B: EX-2 Runoff = 2.15 cfs @ 12.36 hrs, Volume= 0.264 af, Depth= 1.62" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 1.300 55 Good Woods Group B 0.120 98 Impervious 0.280 74 Good Grass Group C 0.260 61 Good Grass Group B 1.960 61 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 12.5 50 0.0200 0.1 Sheet Flow, Woods: Light underbrush n=0.400 P2=3.10" 5.2 310 0.0390 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 466 0.0620 1.2 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 23.9 826 Total Subcatchment EX-1 B: EX-2 Hydrograph F TYpe ..fll 24-hr.-25YR Rainfall ! 5,s4O" Runoff Area=1 .96O ac t l l 1 RunoffVolume- .264;af Runoff Depth=1.62'3' LL 'T -F1w Length-;826_' Tc=23.9�min 1 - 0 1 2 3 4 5 6 7 $ 9 10 11 12 177 ,5 7 17 18 19 20 21 22 23 24 25 26 27 26 29 30 Time (hours) 8354-ex Type 111 24-hr 25YR Rainfall=5.40° Prepared by (enter your company name here) Page 21 H droCAM 7.00 s/n 001234 01986-2003 A lied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 [401 Hint: Not Described (Outflow=Inflow) Inflow Area = 12.280 ac, Inflow Depth 2.08" for 25YR event Inflow _ 16.00 cfs @ 12.46 hrs, Volume= 2.129 of Outflow = 16.00 cfs @ 12.46 hrs, Volume= 2.129 af, Atten= 0%n, Lag= 0.0 ruin Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph 17- 16.00 cis i 1 inflow 1S' —outflow 15 - Inflow 'Area=12.280 ac- - 14- - -i 13----- - --- _ - -- - - -. 9. 77 } I - -- - - - 8� f F F r I I 3 --'F"-- - - .. -i-- - - - - - ----- - : , I 4- 2: `- r ----E 0 0 i 2' 3 4 5 6 7 8 9 1�0 11„112 13 14 15 16 117 18 19 20 21 22 23 24 25 26 27 2$ 29 30 Time (hours) 8354-ex Type 1/124-hr 100YR Ralnfa11=6.30" Prepared by {enter your company name here) Page 22 HydroCADO 7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment EX-1 A: EX-1 Runoff Area=10.320 ac Runoff Depth=2.85" Flow Length=1,459' Tc=32.5 min CN=68 Runoff=18.66 cfs 2.454 of Subcatchment EX-1 B: EX-2 Runoff Area=1.960 ac Runoff Depth=2.21" Flow Length=826' Tc=23.9 min CN=61 Runoff=3.04 cfs 0.361 of Reach 1 R: Design Point 1 Inflow=21.45 cfs 2.815 of Outflow=21.45 cfs 2.815 of Total Runoff Area = 12.280 ac Runoff Volume =2.815 of Average Runoff Depth =2.75" 8354-ex Type 11124-hr 1OOYR Rainfall=6.30." Prepared by (enter your company name here) Page 23 H droCAD®7.00 s/n 001234 © 1986-2003 Applied microcomputer Systems 11/25/2003 Subcatchment EX-1 A: EX-1 Runoff 18.66 cfs @ 12.46 hrs, Volume= 2.454 af, Depth= 2.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 10OYR Rainfall=6.30" Area ac CN Description 6.135 70 Good Woods Group C 3.020 55 Good Woods Group B 0.695 98 Impervious 0.470 74 Good Grass Group C 10.320 68 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft (it/sec) cfs 9.5 50 0.0400 0.1 Sheet Flow, Woods; tight underbrush n= 0.400 P2=3.10" 1.8 82 0.0240 0.8 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 12.5 767 0.0420 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 2.5 237 0.1000 1.6 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 323 0.0300 0.9 Shallow Concentrated Flow, Woodland Kv=5.0 fps 32.5 1,459 Total 8354-ex Type li124-hr IOOYR Rainfall=6.30" Prepared by {enter your company name here} Page 24 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems _ _ 11/25/2043 Subcatchment EX-1 A: EX-1 Hydrograph 20- 18.66 cfs —Runoff -- -_ -Type, fit 24.-hr 100YR_ . 17-' E -.-,. i 1-- i Rainf6ll=6.3.0" :--:--Runoff Alyea=14.320-ac-- 12= - ' Runoff Volume=2.454af 0 10: - : - Runoff Depth 2;85:- 9_ Flow Length 1 ,459,'- 8- -: Tc=32b[b_' 6 -t--. - -; --,---- --- - 5_ E - j - CN=68 4' 0 1 2 3 4 5 6 7 8 9 10 1i1 1F2 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) '8354-ex Type/1/24-hr 100YR Rainfall=6.30" Prepared by {enter your company name here) Page 25 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment EX-1 B: EX-2 Runoff — 3.04 cfs @ 12.35 hrs, Volume= 0,361 af, Depth= 2.21" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area ac CN Description 1.300 55 Good Woods Group B 0.120 98 Impervious 0.280 74 Good Grass Group C 0.260 61 Good Grass Group B 1 MO 61 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 12.5 50 0.0200 0.1 Sheet Flow, Woods: Light underbrush n=0.400 P2= 3.10" 5.2 310 0.0390 1.0 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 6.2 466 0.0620 1.2 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 23.9 826 Total Subcatchment EX-1 B: EX-2 Hydrograph 3.04 c15 -- Runoff -Type III 24-hr 100YR E ; Rainfall-6:.30" I , E ; Runoff Area=1 .964 ac 2- ._ ;----_ '-Runoff V0101 te=0.361- of , Runoff Depth=2.21 '` ` Flow Length=826' Tc=23,9�miry i i E VN=61 - ........ .. ... ........................ ....i....S.... .... .:.. ....,�,��,... �...... ... 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hour's) 8354-ex Type ]//24-hr 100YR Rainfall=6.30" Prepared by (enter your company name here) Page 26 HydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems -___ _, 11/25/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.280 ac, Inflow Depth = 2.75" for 100YR event Inflow = 21.45 cfs @ 12.46 hrs, Volume= 2.815 of Outflow — 21.45 cfs @ 12.46 hrs, Volume= 2.815 af, Atten=0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Reach 1 R: Design Point 1 Hydrograph 24- 23= 2L45 cfs _ I —Inllow - _ _ F _ —p�€Ilaw 22 21= < Inflow Area-12.280 ac 18= I I I t 14 : -- . _ --.-- -�--.- - N = F ? £ 12 T. 4= -- - -_-3- --i- ------j--I---- - - - 3 , 0 1 2 3 4 5 8 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) Proposed Conditions 1-, 2-, 10-, 25-1 100-Year Storm Events \\\08354\docs\memos\memo-W354-slormwaler rev112603 P_Ra. j B` d��y PR-1 B Proposed Retail Driveway/Landscaping PR-1E PR-1 E Proposed Retai PR-1 G 1 PR-1 C Overland to Pond PR-1 A Proposed Retail Pond 1 1 and Parking for Site Y PR-1 D PR-2 Overland to - , Wetland Design Point 1 Subca! Reach F'an 1_in}( Drainage Diagram for 8354-pr Prepared by(enter your company name here) 11/25/2003 HydroCAD6)7.00 s/n 0011234 4D1586-2003 Applied Microcomputer Systems 8354-pr Type /il 24-hr 1 YR Rainfall-2.90" Prepared by {enter your company name here) Page 2 HydroCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=1.98" Flow Length=1,430' Tc=8.8 min CN=91 Runoff=15.92 cfs 1.259 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=2.35" Tc=5.0 min CN=95 Runoff=4.47 cfs 0.322 of Subcatchment PR-1C: PR-1C Overland to Pond Runoff Area=1.290 ac Runoff Depth=0.80" Tc=5.0 min CN=73 Runoff=1.14 cfs 0.086 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=0.75" Tc=5.0 min CN=72 Runoff=0.95 cfs 0.073 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=2.67" Tc=5.0 min CN=98 Runoff=1.54 cfs 0.118 at Reach 1 R: Design Point 1 Inflow=2,95 cfs 1.811 at Outflow=2.95 cfs 1.811 of Pond 1• Pond 1 Peak Elev=125.49' Storage=47,930 cf Inflow=22.25 cfs 1.785 of Outflow=2.80 cfs 1.738 of Total Runoff Area 12.275 ac Runoff Volume= 1.858 of Average Runoff Depth = 1.82" 8354-pr Type ///24-hr 1 YR Rainfall=2,90" Prepared by (enter your company name here) Page 3 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff = 15.92 cfs @ 12.12 hrs, Volume= 1.259 af, Depth= 1.98" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area ac CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.3 50 0.0240 0,2 Sheet Flow, Grass; Short n=0.150 P2= 3,10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area=0.8 sf Perim= 3.1' r=0.25' n= 0.012 8.8 1,430 Total Subcatchment PR-1A: PRAA Proposed Retail 1 and Parking for Site Hydrograph 43 1 I k i I } 17= :- r- 1--r-r--I--r-r--!- 15.92efs -,--r_ _1-_;_ 1__1__T__I__F- 1 I 1 I 3 i i .E I I I 1 1 i f i I L � i ■ e � �y4-hr 1�Y ', <- F I 1 1 f-- -=--1--}--I- I--" f f : E I } Il,Ij 1 - 1 _1__ 1 I `Y A i4. - E _ - v -�- ,----ll i I I 1-__ " I F A! F 3 1 i E I 1 i I i i i k I i 1 1 ROif�#a.11-2.90 ! 12 F 31 1 E I I 1 1 - Runoff-Area-7:640-ac-- L_1__!__1_J__L_ t __I_... ` E _ _}_ _L_.l..._L.....€.__I_.._L_1--I__L-S 4__I__r_;_-E-_---i , IE___ + D I � 1 I I l -R■-no # - -�,-.�,-98i1-- O -u - — .. t 11.--k 1• 1 tL 7� I � E 6- i - 'j`1 -F-` k { I V 1 E v E i i ! 1 �- .. ,. .} .iRTR",^.S'7, ....,w..'.t1.wn..'y'I..w'7"�..::1 E�•.�'.-E ....1.:.: ;�,5-1-'.^�- �•.^T,....�i' '-j 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (Fours) 8354-pr Type 11124-hr 1 YR Rainfall=2.90" Prepared by (enter your company name here) Page 4 HydroCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems - 11/25/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff — 4.47 cfs @ 12.07 hrs, Volume= 0.322 af, Depth= 2.35" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area (ac) CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1.B: PR-1B Proposed Retail Driveway/Landscaping Hydrograph I 1 } I I F F 4.47 cfs I f I € I F l TaYpeR 11 246r € Y- R 4- 1-t -t ainfall ,gp-"�- I € I Runoff Area-1 645 air I Runoff;Volur'ne=�: �lat_- # 3i t I i € ' Runoff Depth-2 35" k I 1 I 1 i I } i £ € 1 I € I I I 1 U. - k i i I € i 3 I € { { i � ' 1 I [ 15 I E• } 2- i.: =.Tc�5:I0,min - ' C t1■■ IQ £ N= 5 1 O'0 1 2 3 4 5 B 7 8 9 10 11 12 13 1+4 15 18 17 18 19 20 21 22 23 24 25 28 27 28 29 30 Time (hours) i 8354-pr Type 1//24-hr I YR Rainfa0=2.90" Prepared by (enter your company name Mere) Page 5 H droCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 C. PR-1 C Overland to Pond Runoff = 1.14 cfs Q 12.08 hrs, Volume= 0.086 af, Depth= 0,80" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area (ac) CN Description 0.380 74 >75%Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C. PR-1 C Overland to Pond Hydrograph Type III 24-hr `I1 YR ' I ! I ! I 4 4 1 F Ra{infall=2;.90I " F '. I S Runoff Area=1 .290' aC I 1 1 ' RUnoff'VOlUme] -O.p$6;I at ' Runoff Depth=0.80"i 1 F I I I E E 1 CN=73 3 ! E I I I I I I ! 1 1 1 f 5 I I 1 • F € ! I 1 I 1 1 3 ! i j ' f i I i I I 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type ///24-hr 1 YR Rainfall-2.90" Prepared by (enter your company name here) Page 6 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff — 0.95 cfs @ 12.09 hrs, Volume= 0.073 af, Depth= 0,75" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 1YR Rainfall=2.9071 Area (ac) CN Description — 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) _ 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph i £ E 1 1 1- - 0.95 CIS -i- - - - - _ Runoff i Type 111' 24-hr l YR F 1 £ I E �£ Rainfall-2.001 3 E Runoff Area'=i A 730r ac Ruric�fif;Volure-;0.07.,3af Runoff Depth-0.75" = 6=150 n1i� -- ' CN=72 . { I F F I 1 1 I I F 1 1 F • i 1 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 B 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type H/24-hr 1 YR Rainfall=2.90" Prepared by (enter your company name here) Page 7 H droCAD®7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff - 1.54 cfs @ 12.07 hrs, Volume= 0.118 af, Depth= 2.67" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 1YR Rainfall=2.90" Area (ac) CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph —Runoff III - 1 Type ICI 24-hr 11 YR Runoff Area=0.530 ac I F { ! 1 1 I I 1 I I I I I 1 ! I E ! 1 ! I I I I 1 1 E €- ;Runoiffi;Vvlu�rle-�:118;a I I I I L I 1 I I 1 E ' ,' ll i I F E I I I I I 1 I Runoff Depth"-2.67 I I S - { I I I I 1 1 1 1 L I I LL I i I Imj I €U-40€ in ' 7 '. CN=98 - { 0 1 2 3 4 5 6 7 B 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type lii 24-hr I YR Rainfall'=2.90n Prepared by {enter your company name here} Page 8 HydroCADO 7.00 sln 001234 OO 1986-2003 Applied Microcomputer Systems -_ _ 11/25/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.275 ac, Inflow Depth = 1.77" for 1YR event Inflow — 2.95 cis @ 12.76 hrs, Volume= 1.811 of Outflow = 2.95 cis @ 12.76 hrs, Volume= 1.811 af, Atten=0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph F 2.96 Ofs i ; - f .Inflow 3- ; -3 I --1 —OuEfiow E Inflow 'Area-12,275 ac i i f � i � • 3 r ! I 1 1 LL } 1 i i I 3 � - � � • I I I I I I € i I I - - I r F E S 1 t £ I I I i i E t I I £ t I 1 1 1 1 1 ! I 3 ! i I I � _ � � ' ! ! I i E I 1 I 1 I 2 • - i 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 1 8354-pr Type It!24-hr 1 YR Rainfall-2.90" Prepared by {enter your company name here) Page 9 HydroCAD@ 7.00 s/n 001234 01986-2003 Applled Microcomputer Systems 11/25/2003 Pond 1. Pond 1 Inflow Area = 11,105 ac, Inflow Depth = 1.93" for 1YR event Inflow = 22.25 cfs Q 12.10 hrs, Volume= 1.785 of Outflow - 2.80 cfs @ 12.82 hrs, Volume= 1.738 af, Atten=87%, Lag=42.8 min Primary - 2.80 cfs @ 12.82 hrs, Volume= 1.738 of Routing by Stor-Ind method,Time Span=0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 14,477 sf Storage= 9,850 cf Peak E1ev= 125.49' @ 12.82 hrs Surf.Area= 18,759 sf Storage=47,930 cf (38,080 cf above start) Plug-Flow detention time=307.8 min calculated for 1.512 of (85%of inflow) Center-of-Mass det. time= 198.1 min ( 1,001,9 - 803.8) # Invert Avail.Stora e Storage Description 1 122.50' 101,040 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 122.50 13,270 0 0 123.00 14,120 6,848 6,848 124.00 15,903 15,012 21,859 125.00 17,800 16,852 38,711 126.00 19,753 18,777 57,487 127.00 21,758 20,756 78,243 128.00 23,836 22,797 101,040 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C=0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C= 0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0,40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=2.79 cfs @ 12.82 hrs HW=125,49' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.35 cfs Q 6.7 fps) 2=Orifice/Grate (Orifice Controls 0.44 cfs Q 1.8 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type 1/124-hr 1 YR Rainfall=2.90" Prepared by (enter your company name here) Page 10 HydroCADO 7.00 s/n 001234 ob 1986-2003 Applied Microcomputer Systems -_ _ 11/25/2003 Pond 'l; Pond 1 Hydrograph 24- 22.2b CEs r r I Inflow 23 - _Primary 21_ ,.. _ €. .,. , . ..E---'--�-=---;-- r'- �_- -"l ...I. - '. = In�fl©w Area- 11,A05-C,1-C-- 20 19- t- J L -1 1 -1 : . _.[ Peak_ Iev�15.49F17-: __ 16- : . - -,-- - - - - '_. € _ £ StQra � 47 030 3ef=- I 3 12? --,-- _�_ - --F-' E 9b- 4' - r -.-- 2.80cfs , r--- I' - - , 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type !fl 24-hr 2YR Rainfa#=3.10" Prepared by (enter your company name Mere) Page 11 H droCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Star-Ind method Subcatchment PR-1A: PR-1A Proposed Retail land Parking f Runoff Area=7.640 ac Runoff Depth=2.16" Plow Length=1,430' Tc=8.8 min CN=91 Runoff=17.37 cfs 1.378 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=2.55" Tc=5.0 min CN=95 Runoff=4.82 cfs 0.349 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=0.92" Tc=5.0 min CN=73 Runoff=1.34 cfs 0.099 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=0.87" Tc=5,0 min CN=72 Runoff=1.13 cfs 0.085 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=2.87" Tc=5.0 min CN=98 Runoff=1.65 cfs 0.127 of Reach 1 R: Design Point 1 Inflow=3.67 cis 1.989 of Outflow=3.67 cfs 1.989 of Pond 1: Pond 1 Peak Elev=125.65' Storage=50,964 ci Inflow=24.29 cfs 1.953 of Outflow=3.48 cfs 1.904 a# Total Runoff Area= 12.275 ac Runoff Volume =2.037 of Average Runoff Depth 1.99" 8354-pr Type/1/24-hr 2YR Rainfad1=3.1 n" Prepared by (enter your company name here} Page 12 H droCAD®7,00 s/n 001234 CO 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff = 17.37 cfs @ 12.12 hrs, Volume= 1.378 af, Depth= 2.16" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area (ac) CN Description__ 0.130 98 Existing Bank Roof 0.720 61 >75%Grass cover, Good, HSG B 0.650 74 >75%Grass cover, Good, HSG. C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks _ 7.640 91 Weighted Average To Length Slope Velocity Capacity Description (min) -(feet) (ft/ft) (fusec) (cfs) 5.3 50 0.0240 0.2 Sheet Flow, Grass; Short n= 0.150 P2= 3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv= 20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area=0.8 sf Perim= 3.1' r=0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1A: PR-1A Proposed Retail land Parking for Site Hydrograph 17.37 ols 1 —Runoff 1T`-_' -r - -•.. _ ,.- - --F-...,--T--'--r- --I--r--r--F--s--ti--I--*-'•__°__ __ _ -__ : ,_ £_ --;-Type '111..24�hr-2YR-- F- K --1-- - - E -- Rdi'O f611:=3_1 i ;]Runoff-Area=7.640-ac-- .1 12 I t 1 I i 3 1 1 ,Runoff;Volume=1 , 78;at-- i { 1 1 { 1 I 1 1 I i f ?r 1 -,-- - -- --';--. ulnof _ epth42. =6`,_ 9_' ; . - - Florni Length=1 ,'4U' - I r i I I 1 I 1 I 1 F �Tc=8:8miri-- C1 =9 0 1 2 3 4 5 6 7 $ 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) I 8354-pr Type i//24-hr 2YR Rainfai1=3.10" Prepared by {enter your company name here} Page 13 H droCADO 7,00 s/n 001234 © 1986-2003 A plied Microcomputer Systems 11/25/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff - 4.82 cfs @ 12.07 hrs, Volume= 0.349 af, Depth= 2.55" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0,01 hrs Type III 24-hr 2YR Rainfall=3.10" _ Area (ac) CN Description 0,270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ftlsec cfs 5,0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 4.82 cis 24-hr 2YR I I 1 ! e f 3 I 1 E ! I Qi 0 4- -'--1_ . -a__1,. .. _ ., ;- ; ; ..,--;-; ; ;;-R f nfali-3;.1 Runoff Area=1 .645 ac r i I �Runof. EVofurne0.349`a . Runoff Depth-2.5511 ',. LL { 3 1 [ 1 b 5:U min CN=95 , 3 1 1 1- t._ 'i_ ?_ �. [ E._ s— 1—-1_ 'r_1 ""f"" _T_—I__I__j,.,_E__1 _ 1 .. r I 1 3 I € I I 1 I t i I . ( o- ., .. .ti--T,-r,T3--4r, r 1. ... p 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 16 .17 18 19 20 21 22 23 2A 25 26 27 28 29 30 Time (hours) 8354-pr Type Ill 24-hr 2YR Rainfal1=3.10" Prepared by (enter your company name here) Page 14 H droCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff W 1.34 cfs @ 12.08 hrs, Volume= 0.099 af, Depth= 0.92" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 2YR Rainfall=3.10" Area (ac) CN Description 0,380 74 >75% Grass cover, Good, HSG C - 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 1.34 cis € Runoff 1 - t E € t Type ICI 24-hr 2YR i € S I Rair>Rf�11;3;.1{D,� R,uno I 1 ffA I I #reaE I-1.I 290F J �- 0 1- -3--,--; -;--;-- - ;- - - - -L- --- #�'I 1 1 1 I ' f 1 Rimoff;V010M'e'=F!0.009;I a 1 �' a ! R u noff Depth 0.92 i T# -4 I I ' 1 A [- 5J0#min V * 1 - I 0- ; 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i 8354-pr Type 1i124-hr2YR Rainfall=3.10" Prepared by (enter your company name here) Page 15 HydroCAM 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems - _- 11/25/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff - 1.13 cfs @ 12,08 hrs, Volume= 0.085 af, Depth= 0.87' Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2YR Rainfall=3.1011 Area ac CN Description 0,980 74 >75% Grass cover, Good, HSG C 0.190 61 >75%Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph E I 1 I E I 1 1 t I s I I —f�UrlOff 1.13 CfS Type III 24-hr 2YR I__L_A__:__ 1 Rainf011=3.1!0" 1 ! I 1 1 I I ! i F I 1 f I I I I I E S 1 1 1 E f E Runoff Alreal=1 .170 ac I I i I i I 1 E 1 I I I 3 I 1 I 3 1 I ! # , 1 E I '. .R n' off=VQlur00=0.0�51 at , 1 E 1 i ; i f 1 I I 1 I ! 1 ,. L - 3 �� } t I Runoff Depth=0.871 I ! I i 1 S I 1 1 U. i I I ! i I 1 i I. I 1 'Tc=S!01tYlll� 1 ! I S Y ! 1 I I 1 I 1 F f I CN_72 1 1 I 0_0 1 2 3 4 5 6 7 8 9 10 1`1 12 13 14 15 16 17 1$ 119 20 21 22 23 24 25 26 27 28 29 30 Time (hour's) �i 8354-pr Type f1124-hr 2YR Rainfa11=3.10" Prepared by (enter your company name here) Page 16 H droCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 11/26/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff 1.65 cfs @ 12.07 hrs, Volume= 0.127 af, Depth= 2.87" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2YR Rainfall=3.1011 Area (ac) CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ft/sec) (cfs) 5.0 Direct Entry, T Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph Runoff 1 I 1 3 1 1.65 cfs 1 I 1 } 3 f I Type III 24-hr 2YR E Rainfall 3.10" F I F 1 1 i 1 I 1 I I 1 1 1 i e E Runoff Area=0.530 ac i i f E i Runoff lu e-O.11LLJ71a fi k Runoff Depth=-2.87" LL I f' I 3 E ;Tc.�5.0EmIn CN=98 - I 0 F 1 I I i 1 ! { ! - 1 ! £ I �. {. i F 0 1 2 3 4 5 6 7 $ 9 10 11 12 13 14 1'5 16 17 18 19 20 1 22 23 24 25 26 27 28 29 30 Time (hours) I 8354-pr Type 11124-hr 2YR Rainfall=3.1 0" Prepared by (enter your company name here) Page 17 HydroCAD@ 7.00 sln 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 [401 Hint: Not Described (Outflow=inflow) Inflow Area = 12.275 ac, Inflow Depth = 1.94" for 2YR event Inflow — 3.67 cfs @ 12.67 hrs, Volume= 1.989 of Outflow - 3.67 cfs @ 12.67 hrs, Volume= 1.989 af, A#ten=0%, Crag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0,00-30.00 hrs, dt= 0,01 hrs Reach 1 R: Design Point 1 Hydrograph 4- r-�- € 3.67 cfs I Initow Inflow Area'12 275 ac ' I ' 3� 2- - - ___ - I 1 I 1 I l I i 1 I _ E _ ' I E f ! I _ j i T .. �.. 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type fit 24-hr 2YR Rainfal1=3.10" Prepared by (enter your company name here) Page 18 HydroCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems _ 11/25/2003 Pond 1: Pond 1 Inflow Area= 11.105 ac, Inflow Depth = 2.11" for 2YR event Inflow = 24.29 cfs @ 12.10 hrs, Volume= 1.953 of Outflow = 3.48 cfs @ 12.70 hrs, Volume= 1.904 af, Atten=86%, Lag= 35.6 min Primary = 3.48 cfs @ 12.70 hrs, Volume= 1.904 of Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 14,477 sf Storage= 9,850 cf Peak Elev= 125.65' @ 12.70 hrs Surf.Area= 19,075 sf Storage=50,964 cf (41,114 cf above start) Plug-Flow detention time=297.6 min calculated for 1.678 of (86% of inflow) Center-of-Mass det. time= 195.1 min ( 996.7 - 801.6 ) # Invert Avail.Stora e Storage Description 1 122.50' 101,040 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.S#ore Cum.Store (feet) (sg-ft) (cubic-feet) (cubic-feet) 122.50 13,270 0 0 123.00 14,120 6,848 6,848 124.00 15,903 15,012 21,859 125.00 17,800 16,852 38,711 126.00 19,753 18,777 57,487 127.00 21,758 20,756 78,243 128.00 23,836 22,797 101,040 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C=0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C=0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=3.48 cfs @ 12.70 hrs HW=125.65' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.45 cfs @ 7.0 fps) 2=Oriifice/Grate (Orifice Controls 1.03 cfs @ 2.3 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type /I/24-hr 2YR RarnfaN-3.10" Prepared by {enter your company name here) Page 19 HydroCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Pond 1: Pond 1 Hydrograph I r I E ~ I 1 26- I t —Inflow + 24.29 ciS 25 I I Nmary 24_ - __ i _ -t-- - t I- I i 'r I - - E i-i I f - 1 --, - Inflow-Area 1-14,05=ac: 21- - 20. Peak- 5.65, F E E i I I__' 1 I E I F 3 L E S i1 r/{M/�■ ;=. 0,964 . ` rf � 14- '--'- I i E - --~--`--L-'- -- --`-- - IA- 0 Lr : - -1- - , 5= -- --r-,- 3.48 C15 --r-- -f -I--r-'r ---r-:4. ----: _ ♦]�__ f __ __ _ _ _.. 1 E I 1 i 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 111 24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here) Page 20 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=3.50" Plow Length=1,430' Tc=8.8 min CN=91 Runoff=27.49 cfs 2.227 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=3.92" Tc=5.0 min CN=95 Runoff=7.25 cfs 0.538 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=1.90" Tc=5.0 min CN=73 Runoff=2.93 cfs 0.204 of Subcatchment PR-1 D. PR-2 Overland to Wetiand Runoff Area=1.170 ac Runoff Depth=1.82" Tc=5.0 min CN=72 Runoff=2.54 cfs 0.177 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=4.26" Tc=5.0 min CN=98 Runoff=2.41 cfs 0.188 of Reach 1 R: Design Point 1 Inflow=10.50 cfs 3.279 of Outflow=10.50 cfs 3.279 of Pond 1: Pond 1 Peak Elev=126.60' Storage=69,887 cf Inflow=38,69 cfs 3.157 of 0utflow=9.84 cfs 3.101 of Total Runoff Area= 12.275 ac Runoff Volume=3.335 of Average Runoff Depth=3.26" 8354-pr Type f1124-hr IOYR Rainfall=4.50" Prepared by (enter your company name here) Page 21 HydroCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff - 27.49 cfs @ 12.12 hrs, Volume= 2.227 af, Depth= 3.50" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area ac CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank,>75%Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 �50 0.0240 0.2 Sheet Flow, Grass; Short n= 0.150 P2=3.10" 0.4 40 0.0500 1,6 Shallow Concentrated Flow, Short Grass Pasture Kv= 7,0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area= 0.8 sf Perim=3.1' r=0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Hydrograph 30- T/ 27.49 CI$ 1 I E ! E I 1 ! E 3 1 I E _f_ i ...�.,,_i_.-f _..1.,.-.1_ Runoff 2$ - I �1 I f 26_ -;--I-- Type-111;24=hr IOYR-- I I I ! I I I E i I i E E E�_ Ra�f II_4.50 _E_. .`,_ 1 _'_ _ L .. _..__ E, Runoff-'Area=7i640-no-` 1 I I 1 E 4 I 1 I 3 1 It,} yo l ure i � 12 I _ _;______ Runoff; •2271a E i 3 E .... Ruln off De'pth,3.50"0 14- ` 1 I I I E } • E E l i l l E } I I f i ,-.- E 'Flow- L:e'gth.;1 ,[.430'-- 12 --, -- -; -- -E.. }.. 10---1" -I--3 -.,--�_1 _J--_. -�"-`E_-F - ---L-� -- -._ .. . _. _ _�1 _;_. .I__ TJ■A-^I- V.8'&n!i1■ 1 e ! I I ! 1 - E - I 1_L_,%... 1 . I 1 f i I f 1 -E I � ' I 1 E I i 1 0- ,, ...:,,:-...[5...,..-.. �._ �...�t...sti--ASS-,ram r-,. •, •: 1. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type Hi 24-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 22 W droCAD®7.00 s/n 001234 OO 1986_2003 Applied Microcomputer S stems 11/25/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff = 7.25 cfs @ 12.07 hrs, Volume= 0.538 af, Depth= 3.92" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0,00-30.00 hrs, dt=0.01 hrs Type Ili 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0,702 98 Retail 3 Roof 1.645 95 Weighted Average To Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) &0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph ' L_ 7.25 --r31-_LIi ___ _. --- ' 6 11��I�I£ -hII _rI1 �O1 Y1i �T I1 011 ' 4 50 ccRa,1 of ; , , - _I ; Runoff Area"-1.645 ac _,----L_�__1__L_: : Runo`.ff'Volur»e-0.58;a Depth I V 9 { 3 4- u n off ; ;� ! I k T' 5 Oirriin /ice I I I u l`�/r E J-- _ L _i - I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 119 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type ///24-hr 10YR Rainfall=4.50" Prepared by (enter your company name here) Page 23 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff — 2.93 cfs Q 12.08 hrs, Volume= 0.204 af, Depth= 1.90" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ae) CN Description _ 0.380 74 >76% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (Rift) (ft/sec) cfs) _ 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph _ fiunoff --- --`-- - 2.93cfs F E Type 111,24-hrE 10YR i4. I I Ra1nfa11-4.50" Runoff Area=1 .290 ac;! �R' off Volume=0.2! i�041a ' ! '1 3 1 I £ Runoff Depth=1i.90I 3 1 € I I ! 1 ! I �Tc-50,m1n CN=73-- , I I I 1 • I i I j f i : I � � ; I I I i /� I E I I I I 0- I 1' I I Ing 1 1 1 0 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 16 19 20 21 22 23 24 25 26 27 20 29 30 Time (hours) 8354-pr Type I//24-hr 10YR Rainfall=4.50" Prepared by (enter your company name here) Page 24 H droCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff — 2.54 cfs @ 12.08 hrs, Volume= 0.177 af, Depth= 1.82" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Te Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs 5.0 Direct Eritry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 2.54 efs Runoff E F 3 Type 111 24-hr 1 UYR E Ra;infa11=4,50" Runoff Area=1 .170 a ' }ff} I I 1 ' w Rulno ;Volume1 =;0.''17,71af Runoff Depth ; 1!.82" 'Tc=5:Omin CN=72 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 10YR Rainfall=4.50" Prepared by {enter your company name here} Page 25 HydroCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff = 2.41 cfs 0 12.07 hrs, Volume= 0.188 af, Depth= 4.26" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type Ill 24-hr 10YR Rainfall=4.50" Area (ac) CN Description 0,530 98 Retail 1 Roof —..__.,.. Tc Length Slope Velocity Capacity Description min feet ftlft ftlsec cfs 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 2.41 cis —Runoff I I E t ; Type 11124-hr 1OYR i 1 I F I i I I E , 2_ _J__!__t_ R41hfall.=4.5,0" f Runoff Area=0.530 ac Ru6o1f:V©1u*-0.108'of .:w II ! 1 ! 1 1 ! E 1 1 Runoff Depth_4.26 I Li i E iLL 1 i 1 1CN=98 I i I 1t 1 i1 i i# 1 1i i ii I i# 1 ii I iI I ii Q "I �IrI�S 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (fours) 8354-pr Type 11124-hr 10YR Rainfall-4.50" Prepared by {enter your company name here) Page 26 H droCAD@ 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 f401 Hint: Not Described (Outflow=Inflow) Inflow Area= 12.275 ac, Inflow Depth = 3.21 for 10YR event Inflow = 10.50 cfs @ 12.45 hrs, Volumes' 3.279 of Outflow - 10.50 cfs @ 12.45 hrs, Volume= 3.279 af, Atten=0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph ow 10.50 fl t � � � I � 4no , wOum cls _ ; Inflow 'Afrea'12' 275 ac 1 f 1 1 -1- 4 -_#__!'--Z_.....I_ t 1 ! L i # 1 l S l i - ! 2- L } - - - ----I .i.. I � { F } # i 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tlme (hours) 8354-pr Type IN 24-hr 10YR Rainfafl=4.50" Prepared by (enter your company name here) Page 27 H droCADO 7.00 s/n 001234 © 1986-2003 Applied microcomputer Systems 11/25/2003 Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 3.41" for 10YR event Inflow - 38.69 cis @ 12.10 hrs, Volume= 3.157 of Outflow - 9.84 cfs @ 12.51 hrs, Volume= 3.101 af, Men=75%, Lag=24.4 min Primary = 9.84 cfs @ 12.51 hrs, Volume= 3.101 of Routing by Stor-Ind method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 14,477 sf Storage= 9,850 cf Peak Elev= 126.60' @ 12.51 hrs Surf.Area=20,951 sf Storage=69,887 cf (60,038 cf above start) Plug-Flow detention time= 235.3 min calculated for 2.875 of (91%of inflow) Center-of-Mass dot. time= 164.1 min ( 953.8 - 789.8 } # Invert Avail.Storage Storage Description _ 1 122.50' 101,040 cf Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store feet s -ft cubic-feet cubic-feet 122.50 13,270 0 0 123.00 14,120 6,848 6,848 124.00 15,903 15,012 21,859 125.00 17,800 16,852 38,711 126.00 19,753 18,777 57,487 127.00 21,758 20,756 78,243 128.00 23,836 22,797 101,040 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C=0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=9.84 cfs @ 12.51 hrs HW=126.60' (Free Discharge) 1=Orifice/Grate (Orifice Controls 2.94 cfs @ 8.4 fps) 2:Orifice/Grate (Orifice Controls 6.90 cfs @ 4.0 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type/1/24-hr IOYR Rainfatf=4.50" Prepared by {enter your company name here} Page 28 H droCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Pond 1: Pond 1 Hydrograph 42- i inflow 4Q= ' - - --1--r 'S- --r-? 38.6sCIS -i ._r- ,--Y- t - - ;--i--r- --i--[ - --1 - Prima 'r i -T36 _-1 I € n#!ow-Airea.$1-1 1 5-ec-- i F I 1 Imf 1 ■ 34 - - - --�---- - i Peak r ev=,l2&. 01-- F 1 F i I I 1 F S 1 1 f . ..i-._:.. .. •-'E!--I - i--II--i i-_F1.,. - i1_-II--Ir r8c 28 t ' r' -8-- 7 --- - 26: 22' I f I { I 12: - 1 i 2 o- .. ; . 0 1 2 3 4 5 6 7 8 9 1 Q 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 26 27 28 29 30 Time (hours) 8354-pr Type 1i124-hr25YR Rainfall=5.40" Prepared by {enter your company name here} Page 29 H droCAD®7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1A: PR-1A Proposed Retail land Parking f Runoff Area=7.640 ac Runoff Depth=4.37" Flow Length=1,430' Tc=8.8 min CN=91 Runoff=33.95 cfs 2.783 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=4.82" Tc=5,0 min CN=95 Runoff=8.79 cfs 0.660 of Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff Area=1.290 ac Runoff Depth=2.60" Tc=5.0 min CN=73 Runoff=4.06 cfs 0.279 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=2.51" Tc=5.0 min CN=72 Runoff=3.55 cfs 0.245 of Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=5.16" Tc=5.0 min CN=98 Runoff=2.90 cfs 0.228 of Reach 1 R: Design Point 1 Inflow=13.75 cfs 4.135 of Outflow=13.75 cfs 4.135 of Pond 1: Pond 1 Peak Elev=127.20' Storage=82,891 cf lnflow=47.99 cfs 3.950 of Outflow=12.75 cfs 3.890 of Total Runoff Area = 12.275 ac Runoff Volume=4.195 of Average Runoff Depth =4.10" 8354-pr Type 11124-hr 25YR Rainfall=5.40" Prepared by {enter your company name here} Page 30 HydroCADO 7.00 s/n 001234 O 1986-2003 Applied Microcomputer Systems _11/25/2003 Subcatchment PR-1 A: PR-1 A Proposed Retail 1 and Parking for Site Runoff = 33.95 Oft @ 12.12 hrs, Volume= 2.783 af, Depth= 4.37" Runoff by SCS.TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank>75%Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 50 0.0240 0.2 Sheet Flow, Grass: Short n= 0.150 P2=3.10" 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv=7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area=0.8 sf Perim=3.1' r=0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking for Site Hydrograph $8- 36 . ,.. , $3.95cis I 1 ! ! I 3 1 E -TYp e-111,-24-hr25YR-- 28= ;-Rainfa11=5,4,0"-- r , I ! 26 --,--; --i-oI'Alrea= 1 . N 22= -;- -- - - - :- ---, - ;-- -,--;Runoff;Vol;ume=2.783 af- w _ : _1__,-. --=-Runoff- Depth=4.37'!! - £ 16- �.._I_ �- - ! 3 € 1 1 � � -_ _ _�--! > _�-Flow Length='�,43---- ! 12' -------- --.- - - -- =- 1--=- - E 5--1 _ - _ Tc=8:S Iriilr - _ _I - F 1 F ! I 4_ Q"' . .,.:..j.ST�,-!o'.-....,.... ..., ..:. � �f.�.`i' •..•3'•.•. . 1.. .F.. . :...F....I.-..1:...1.... .... 0 1 2 3 4 5 6 7 "8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type Ill 24-hr 25YR Rainfall=5.40" Prepared by {enter your company name here} Page 31 H droCAD®7.00 s/n 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff _ 8.79 cfs Q 12.07 hrs, Volume= 0.660 af, Depth= 4.82" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0,01 hrs Type Ill 24-hr 25YR Rainfall=5.40i1 Area (ac) CN Description - 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0,523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) _ 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 1 I 1 { { ! I ! 8,79 cis /� G I 1 2{ Yp. _ 1 r 25YR. i It Rainfa11 ,.5.40" - Ruhoff Area--1 .645 ac I 1 y ;Rulnoff;Volume=0,6G0 of Runoff- ■ Depth=4 82" ! 1 3 I ? 3 i 3 1 F I I S F 1 1 { I - I : 1 !� ! - 1 1 1 , 1 3Tc 5 0-min I I F �'ww��ww i C: N=95 _. . I 1 1 I 1 1 1 0 0 I 1 2 3 4 1 5 6 7 s 9 10 11 12 1$ 14 15 16 17 18 19 20 21 22 23 24 25 2-6 27 28 29 30 Time (hours) 8354-pr Type 11124-hr 25YR Rainfall=5.40" Prepared by {enter your company name here} Page 32 H droCADO 7.00 sin 001234 @ 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 C. PR-1 C Overland to Pond Runoff = 4.06 cfs @ 12.08 hrs, Volume= 0.279 af, Depth= 2.60" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0.380 74 >75% Grass cover, Good, HSG C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area _ 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 4.06 cFs I € 1 1 i ! Runoli E 'ype 111:24-hr; 25YR Rainfall=.5.4:011 - - -;- ;- ,-Runoff Arezc=1.290-aC 1 1 , y q } ;Runoff€Volume-0.! ! I a 1 i € } 3 Runoff Depfh:�:2.60" t F FTc=5:0!mirl £ I t F € 1 1 [ 1 1 } € { I I I I 1 1 1 ! [ I i i § T- I E 7 1 1 l 1 5 F € 1 £ i € i k € F I £ CN=73 - t 0 1 2 3 4 5 6 7 $ 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time {hours} 8354-pr Type III 24-hr 25YR Rainfall-5.40" Prepared by ;enter your company name here} Page 33 HydroCAD®7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff = 3.55 cis @ 12.08 hrs, Volume= 0.245 af, Depth= 2.51" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0,01 hrs Type III 24-hr 25YR Rainfall=5.40" Area (ac) CN Description 0.980 74 >75% Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/fi ft/sec cfs 5,0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 1 I 1 ! E 3.55 cfs —Runnff i Type 111,24-hr, 25YR 1 f i I I 1 iI I AWL { F I - 1 Runoff Area-1 .170 ac I I { f 3 I i `RunofflVQlume='0.2451af 1 1 F I I I 1 2 } 1 Runoff-Devt1y^2.51 2Tc4 N-3111Ii 11^_�_73EIi - - _ { _ I I I 1 E ( 1 I I I I I 3 f 1 I I I i i I 3 1 I I 1 1 I 1 1 1 1 I 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 1i124-hr25YR Rainfall=5.40" Prepared by {enter your company name here} Page 34 HydroCADO 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff — 2.90 cfs @ 12.07 hrs, Volume= 0228 af, Depth= 5,16" Runoff by SCS TR-20 method, UH=SCS, Time Span=0,00-30,00 hrs, dt=0.01 hrs Type Ili 24-hr 25YR Rainfall=5.40" Area ac CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph 3 - :- - - --;-- - ,- 2.90cfs E ] Type III 1724-hr, 2.5YR ! f Rafirifali-$Ao" E I ! F ! [ I 1 1 } } i } I f Runoff Area'=0.530 aC 1R�1■yE�� jf I 1 i ul ioff, f Olual�Y=l0.�12V,at F 1 : Runoff Depth i=5.16 £ Tc� �F 5 O,t>�tin Cn`11 ooQQ 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 U 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 111 24-hr 25YR Rainfall-5.40" Prepared by {enter your company name here) Page 35 H droCADO 7.00 sln 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Reach 1 R: Design Point 1 [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.275 ac, Inflow Depth 4.04" for 25YR event Inflow = 13.75 cfs @ 12.40 hrs, Volume= 4.135 of Outflow - 13.75 cfs @ 12.40 hrs, Volume- 4.135 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Reach 1 R. Design Point 1 Hydrograph 13,75 c(s —Inflow 14 , I I , —Outflow I : I ! 1jx 43 l-nif ow. Area l 2�.275 ac 1__L_-_!_ - -- -I-_i -- - F , F F I I ! 1 I I , I I t 1 i I -- -- �- - I I I E I I 5- 4`._�- - 1 ! 1 L I I I i I i Ii ! I ! E 1 1 I I I . I I _ _ _ F_.1 :.....,..__I- -i- `-.y_-.1__#'_T_-I_ 2- 1 1 t ! ! I I 1 1 S I 4 I f E € E I! I ? 1 1 S ! 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type 11124-hr25YR Rainfall=5.40" Prepared by (enter your company name here) Page 36 HydroCAD@ 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Pond 1: Pond 1 Inflow Area = 11.105 ac, Inflow Depth = 4.27" for 25YR event Inflow = 47.99 cfs @ 12.10 hrs, Volume= 3.950 of Outflow = 12.75 cfs @ 12.50 hrs, Volume=. 3.890 af, Atten= 73%, Lag=23.6 min Primary - 12.75 cfs @ 12.50 hrs, Volume= 3.890 of Routing by Stor-Ind method, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 14,477 sf Storage=9,850 of Peak Elev= 127.20' @ 12.50 hrs Surf.Area=22,182 sf Storage= 82,891 of (73,041 of above start) Plug-Flow detention time=212.3 min calculated for 3.663 of (93% of inflow) Center-of-Mass det. time 151.8 min ( 936.2 - 784.4) # Invert Avail.Storage Storage Description 1 122.50' 101,040 of Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet 122.50 13,270 0 0 123.00 14,120 6,848 6,848 124.00 15,903 15,012 21,859 125.00 17,800 16,852 38,711 126.00 19,753 18,777 57,487 127.00 21,758 20,756 78,243 128.00 23,836 22,797 101,040 # Routing Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C=0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C=0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=12,75 cfs @ 12.50 hrs -HW=127.20' (Free Discharge) 1=Orifice/Grate (Orifice Controls 3.22 cfs @ 9.2 fps) 2=Orifice/Grate (Orifice Controls 9.53 cfs @ 5.4 fps) 3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) 8354-pr Type /it 24-hr 25YR Rainfall=5.40" Prepared by (enter your company name here) Page 37 001234 0 1986-2003 Applied Microcomputer Systems 11/25/2003 Pond l: Pond l Hy dro gra ph F—tn I I o—w- --- -- - - 47.99 efs PHMafy I 46.. 105-AC 44-' 4 0- I 4 eak-E ev=-1 27.2O' J- 6- o ade= 34,-- 2,89 32- 30- --4- J�- 2 26� 4- E 24�: I 22- - 204..., 12.75 cis I 14= T- a 1 2-� I 8 -I- J 4 --------L -i---i-- 0 26 27 28 29 30 0 1 2 3 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Time (hours) 8354-pr Type II124-hr 100YR Rainfall=6.30° Prepared by {enter your company name here} Page 38 HydroCADO 7.00 sln 001234 © 1986-2003 Applied Microcomputer Systems 11/25/2003 Time span=0.00-30.00 hrs, dt=0.01 hrs, 3001 points Runoff by SCS TR-20,method, UH=SCS Reach routing by Stor-Ind�+Trans method - Pond routing by Stor-Ind method Subcatchment PR-1A: PR-1A Proposed Retail 1 and Parking f Runoff Area=7.640 ac Runoff Depth=5.25" Flow l-ength=1,430' Tc=8.8 min CN=91 Runoff=40.37 cfs 3.343 of Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Lands Runoff Area=1.645 ac Runoff Depth=5.71" Tc=5.0 min CN=95 Runoff=10.33 cfs 0.783 of Subcatchment PR-1 C: PRA C Overland to Pond Runoff Area=1.290 ac Runoff Depth=3.34" Tc=5.0 min CN=73 Runoff=5,24 cfs 0.359 of Subcatchment PR-1 D: PR-2 Overland to Wetland Runoff Area=1.170 ac Runoff Depth=3.24" Tc=5.0 min CN=72 Runoff=4.61 cfs 0.316 at Subcatchment PR-1 E: PR-1 B Proposed Retail 1 Runoff Area=0.530 ac Runoff Depth=6.06" Tc=5.0 min CN=98 Runoff=3.39 cfs 0.268 of Reach 113: Design Point 1 Inflow=20.96 cfs 5.003 of Outflow=20.96 cfs 5.003 at Pond 1: Pond 1 Peak Elev=127.71' Storage=94,392 of Inflow=57.28 cfs 4.753 of 0utflow=19.57 cfs 4.687 of Total Runoff Area= 12.275 ac Runoff Volume= 5.069 of Average Runoff Depth = 4.95" 8354-pr Type 1/124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here] Page 39 H droCADO 7.00 s/n 001234 a 1986-2003 ApRiled Microcomputer Systems 11/25/2003 Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Runoff - 40.37 cfs @ 12,12 hrs, Volume= 3,343 af, Depth= 5.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area (ac) CN Description _ 0.130 98 Existing Bank Roof 0.720 61 >75% Grass cover, Good, HSG B 0.650 74 >75% Grass cover, Good, HSG C 0.590 74 Bank:>75% Grass cover, Good, HSG C 5.550 98 Parking, sidewalks 7.640 91 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) _ 5.3 50 0,0240 0.2 Sheet Flow, Grass: Short n=0.150 P2= 3.1011 0.4 40 0.0500 1.6 Shallow Concentrated Flow, Short Grass Pasture Kv=7.0 fps 1.8 450 0.0400 4.1 Shallow Concentrated Flow, Paved Kv=20.3 fps 1.3 890 0.0500 11.0 8.63 Circular Channel (pipe), Diam= 12.0" Area=0.8 sf Perim= 3.1' r=0.25' n=0.012 8.8 1,430 Total Subcatchment PR-1 A: PR-1A Proposed Retail 1 and Parking for Site Hydrograph 44_ t -R yry f: uncfI 42= 40.37 cfs -- - - { 40- ;Type; III 24;-hr 10OYR .. fw I ' 34; -�- ,--� - ---_--3- - -- --I--r-,- -�-,-Rainfall=6;.30"-- I 30: Runoff-Area=7.640 ac- ! -I--l- A--j__i--1__I.._t, - 1 3 I , ', - E 1 E E I I 1 I 1 7 ! I 1 h 26- --,--,--__ _, . .. _�- ,__ �__r_�- 'Runoffi-VOW 6 ''3-.343;af-- : Runoff Depth=5 25" 0 2 ' ly 0- low L I E i I th=1 4 I30` F eng 1--1--t------------I - r-- -- 14_ -, -,-- -,--i-- ,--:. ... . -c;8.8 min-- f 1 4- - - -- - W -r- --r-- I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354- r Type 11124-hr 100YR Rainfall=6.30" Prepared by {enter your company name here} Page 40 HydroCAM 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems _ 11/25/2003 Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Runoff — 10.33 cfs @ 12.07 hrs, Volume= 0.783 af, Depth= 5.71" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area (ac) CN Description 0.270 98 Driveway 0.150 61 >75% Grass cover, Good, HSG B 0.523 98 Retail 2 Roof 0.702 98 Retail 3 Roof 1.645 95 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5.0 Direct Entry, Subcatchment PR-1 B: PR-1 B Proposed Retail Driveway/Landscaping Hydrograph 14.33cfS I 14-.-1_ _ _J_J__.._ .t - -, _ _J_._[ _J-J_ t._, , i__L_J_ 1 _- hype I �24- r 10.6*0. i F ! I F E - Rainfa11�6.30 Runoff Area=_ !. t _ 1 .645 ac [ - t--F--� . ; ....1 - --IRu,--Iff�V'...jl ; N ; no ; o ,ume=0.1 ;of -i--- - i - ! Runoff Depth :.:5 71 ,E y 4 CN=95 3 i t i--.--r- _ _I -r-1--1- r --I r -1 " I ---1-- ----I -r - [ 2 _1..._t,_�L_�__i_..i--.t_... '_ -r__L_J__I__L_.J__I__F._J-._I_-,S.-J__i_. _t____ I 1 i S I 1 f [ 1 t I 3 _C 1 _ I-.-�--1- "1 1--1--r-J----T--t__i_ -1..... _ i i i i 1 £ 1 I f 3 ! ! - i 0- „ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 34 Time (hours) 8354-pr Type 11124-hr 100YR Rainfall=6.30" prepared by {enter your company name here} Page 41 HydroCAD®7.00 s/n 001234 O 1986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 C: PR-1 C Overland to Pond Runoff — 5.24 cfs @ 12.08 hrs, Volume= 0.359 af, Depth= 3.34" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 100YR Rainfall=6.30" Area ac CN Description 0,380 74 >75% Grass cover, Good, HSG'C 0.620 61 >75% Grass cover, Good, HSG B 0.290 98 Reserve Parking Area 1.290 73 Weighted Average Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 5,0 Direct Entry, Subcatchment PR-1 C: PR-1 C Overland to Pond Hydrograph 5.24 cfs ! I 1 I I I I 1 ! 1 E } } I 1 I I -I-- I j-1,,,i I 1 _ 5- - - , l ypel 11 4�h■ 0, YR r I 9 i i I I ! t I I 1 I i E I. I I �t ; Ra nfali;6.3,011 - ' I ] I 4- ----`- ;-f---- - , ; -RL(hbff Area'=1 290 ad I i I I 1 I I I t I I I r I f I k ! 1 ! ' II R06 01 f I o lulme 3 91 af �_ 1 I { } E 3 I I ¢ i t I I 1 I } I -3 �-D--�- 3 ITT- ! � -- I I I 1 1 ! 3 1 + I i V .'__'`�' U ff6f eOW .34'! r W I I I I 1 E I f 1 i 1 E I 1 I 1 I■/�� I 1 S I 1 iTc-�5:01rr in IL.- . L 1 I } I I I I } E I t r ! I I k I 1 I I 3 1 I ! I I I 1 I t I I I i 1 i F I I I t I I I 1 1 i I f I I I 1 1 I I � i ! } I i 1 1 I i I 1 I F 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type Ill 24-hr 100YR Rainfall=6.30" Prepared by (enter your company name here} page 42 HydroCADO 7.00 s/n 001234 01986-2003 Applied Microcomputer Systems 11/25/2003 Subcatchment PR-1 D: PR-2 overland to Wetland Runoff — 4.61 cfs @ 12.08 hrs, Volume= 0.316 aft Depth= 3,24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt=0.01 hrs Type III 24-hr 100YR Rainfall=6.301i Area (acl CN Description 0.980 74 >75%Grass cover, Good, HSG C 0.190 61 >75% Grass cover, Good, HSG B 1.170 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ftlft) (ftlsec) (cfs) 5,0 Direct Entry, Subcatchment PR-1 D: PR-2 Overland to Wetland Hydrograph 4.61 cfs E t 3 ; 3 i FlUn011 i Type:11124 E hr 100YR 1 ; Runoff Area-1i 17o ac 1 I 3-"-�--i- R un V©lu off + =F0.3'�6;a - 1 ! i l l Runoff O Depth-3i }24" 1 t 3 r I I k 1 1 1 - -, 0;min- , -;--; I E J I i I 1 i 3 i I i I I I F I 1 CN=72 0 4 1 2 3 4 6 6 7 8 9 10 11 12 113 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) i 3 8354-pr Type ll124-hr 100YR Rainfall=6,30" Prepared by {enter your company name here} Page 43 HydroCADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 11125/2003 Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Runoff — 3.39 cfs Q 12.07 hrs, Volume= 0.268 af, Depth= 6.06" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type Ill 24-hr 100YR Rain#all=6.30" Area ac CN Description 0.530 98 Retail 1 Roof Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) cfs) 5.0 Direct Entry, Subcatchment PR-1 E: PR-1 E Proposed Retail 1 Hydrograph k : 3.39 c€s Type)III 24=hr 100YR - 3- Rainfall E 6.3,09 f f E 1 i Runoff Area;-0.530 ac y Runoff.Void_ rye=0.2$8;of 0 2- Runoff Depth�-6 06" 4 " i 1 ! 1 E E ! E I E ! E E I I I LL 1 E 1 1 1 1 E f I I I { : I ! 1 151 I O 1 €. 1 i l E I I I I f ! ITc Imir ' } CN=98 it 00:. j....2 3 4 $. ..6 .7 8 9 1 0 11 12 13 1 A 15 16 17 18 19 24 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354-pr Type III 24-hr 100YR Rainfall=6.30" Prepared by f enter your company name here} Page 44 HydroCADV 7.00 s/n 001234 © 1986-2003 Applied Microcomputer Systems _ 11/25/2003 Reach 1 R: Design Point 1 (40] Hint: Not Described (Outflow=Inflow) Inflow Area = 12.275 ac, Inflow Depth = 4.89" for 100YR event Inflow = 20.96 cfs @ 12.41 hrs, Volume= 5.003 of Outflow = 20.96 cfs @ 12.41 hrs, Volume= 5.003 af, Atten= 0%, Lag=0.0 min Routing by Stor-Ind+'Trans method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Reach 1 R: Design Point 1 Hydrograph 23' 1 } i , 22' 20.96 cfs E -i -i- - - - ; -Inflow Outflow ni I 1 e n:p �" y �Lnfl�Rif_'!AI'.ea-1.2�.275_- ac _ - -I— iL -. 17 -._I_-i-i-__1__ _ _ L_-_ _._ .- - 1 A. j-— _I— 11- IL 10 - -7. 1 i i Q' .. .; ,.,I.. . .., .,. ...I.. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1B 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) 8354_pr Type 111 24-hr 100YR Rainfall=6.30" Prepared by (enter your company name here) Page 45 Hydro ADO 7.00 s/n 001234 OO 1986-2003 Applied Microcomputer Systems 11/25/2003 Pond 1: Pond 1 Inflow Area = 11,105 ac, lnflow Depth = 5.14" for 100YR event Inflow = 57.28 cfs @ 12.10 hrs, Volume= 4.753 of Outflow - 19.57 cfs @ 12.42 hrs, Volume= 4.687 af, Atten= 66%, Lag= 19.2 min Primary _ 19.57 cfs @ 12.42 hrs, Volume= 4.687 of Routing by Stor-Ind method, Time Span=0.00-30.00 hrs, dt=0.01 hrs Starting Elev= 123.20' Surf.Area= 14,477 sf Storage= 9,850 cf Peak Elev= 127.71' @ 12.42 hrs Surf.Area=23,230 sf Storage= 94,392 cf (84,542 cf above start) Plug-Flow detention time= 195.4 min calculated for 4.460 of (94% of inflow) Center-of-Mass det. time.= 142.4 min ( 922.5 - 780.0 ) # Invert Avail.Stora e Storage Description 1 122.50' 101,040 cf Custom Stage Data(Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 122.50 13,270 0 0 123.00 14,120 6,848 6,848 124.00 15,903 15,012 21,859 125.00 17,800 16,852 38,711 126.00 19,753 18,777 57,487 127.00 21,758 20,756 78,243 128,00 23,836 22,797 101,040 # Routinq Invert Outlet Devices 1 Primary 123.20' 8.0" Vert. Orifice/Grate C= 0.600 2 Primary 125.20' 18.0" Vert. Orifice/Grate C=0.600 3 Primary 127.50' 20.0' long x 11.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1,40 1.60 Coof. (English) 2.53 2.59 2.70 2.68 2.67 2.68 2.66 2.64 Primary OutFlow Max=19.53 cfs @ 12.42 hrs HW=127.71' (Free Discharge) 11=Orifice/Grate (Orifice Controls 3.43 cfs @ 9.8 fps) 2=Orifice/G rate (Orifice Controls 11,28 cfs @ 6.4 fps) 3=Broad-Crested Rectangular Weir (Weir Controls 4.82 cfs @ 1.2 fps) 8354-pr Type ///24-hr lOOYR Rainfall=6.30" Prepared by [enter your company name here) Page 46 HydroCAD@ 7.00 s/n 001234 0 19W2003 Applied Microcomputer Systems 11/25/2003 Pond l: Pond l Hydrograph in so- - j - 67.. 8 CIS Primary In#tvw-Airea=11�1'05- c. _i T 50- T_-I--F : P _ lev V.71 , �t ralql el=_44,392 ict 35 - 0 30- 25-- - 20--- I t t 10--- 0 1 11 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14'16 16 17 18 19 20 21 22 23 24 25 26 2*1 28 29 30 Time (hours) Attachment D: Hydraulic Analysis \\\083541dots\memos\memo-63354-slormwater rev1.12603 Attachment E: TSS Removal Worksheets Water Quality Volume Calculations \\\D8354\docs\memos\memu-OS354-StOfnlwatcT revI12603 VHB Vanasse Hangen Brustfin, Inc. ITSS Removal • Consulting Engineers and Planners 101 Walnut St., Watertown, MA 02471 Name: Eaglewood Shops Proj. No.: 08354 (617) 924-1770 Date: 11/26/2003 Location: N. Andover, MA Computed by: CEC Checked by: To Pond Inlet 1: A B C D E BMP TSS Removal Starting TSS Amount Remaining Rate Load* Removed (BxC) Load (C-D) Parking Lot 10 1.00 0.1 0.90 Sweeping Deep Sump and Hooded Catch 25 0.90 0.23 0.68 Basin Extended Detention Basin 70 0.68 0.47 0.20 with Forebay Total TSS Removal= 80% Notes; *Starting TSS Load for first BMP=1.00. TSS load for subsequent BMP's is equal to the Remaining Load (E)from the previous BMP. ... .... VHB Vanasse Hangen Brustlin, Inc. �TS.S Removal Calculation Consulting Engineers and Planners 101 Walnut St_, Watertown, MA 02471 Name: Eaglewood Shops Proj. No.: 08354 (617) 924-1770 Date: 11/26/2003 Location: N. Andover, MA Computed by: CEC Checked by: To Pond Inlet 2: A B C D E BMP TSS Removal Starting TSS Amount Remaining Rate Load* Removed (BxC) Load (C-D) Parking Lot 10 1.00 0.1 0.90 Sweeping Stormceptor 80 0.90 0.72 0.18 Total TSS Removal= 82% Notes: *Starting TSS Load for first BMP= 1.00. TSS load for subsequent BMP's is equal to the Remaining Load (E)from the previous BMP. _...... - . . ... VHB Water Quality Volume Calculations Project Name: Eaglewood Shops Proj. No.: 08354 Project Location: N. Andover, MA Date: 11/25/2003 Calculated by: CEC Water Quality Basin 1 Proposed Impervious Area To Forebay= 5.68 Acres Net Proposed Impervious Area for Site= 7.19 Acres Proposed Impervious to be Treated= 5.17 Acres Required: Runoff Depth to Required be Treated (in) Volume (c.f.) Forebay Volume 0.1 2,062 Water Quality Volume 0.5 9,384 Provided: Cumulative Forebay Elevation Area(s.f.) Volume (c.f.) 124.5 218 0 125.0 316 134 126.0 581 582 127.0 927 1,336 128.0 1,325 2 462 Cumulative Basin Elevation Area(s.f.) Volume(c.f.) 122.5 13,270 0 123.0 14,120 6,848 123.2 14,464 9,706 Page 1 of 1 i I i