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HomeMy WebLinkAboutWPO201900066 Calculations 2020-11-18BEAVER CREEK MEDICAL OFFICE BUILDING COUNTY OF ALBEMARLE, VIRGINIA DESIGN CALCULATIONS & NARRATIVE NOVEMBER 25, 2019 REVISED: FEBRUARY 4, 2020 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Craig Kotarski, PE Timmons Group 608 Preston Ave, Suite 200 Charlottesville, VA 22903 434.327.1688 MAIG W. I KOTARSKI Lic. No. 0402048507 2/4/20 � Table of Contents Section Title Project Narrative 2 LD 229 — Storm Sewer Design Computations LD 204 — Storm Inlet Design Computations 4 LD 347 — Hydraulic Grade Line Computations Virginia Runoff Reduction Method Worksheet Summary 6 Pre -Developed HyrdoCAD Calculations 7 Post -Developed HydroCAD Calculations Project Narrative: This project includes the demolition of two existing buildings, followed by the construction of a new medical office building with underground parking, a surface parking lot, and associated utility and site work. The limits of clearing and grading totals 1.51 acres. Stormwater Management: Water Quality In the pre -developed condition, there exists 1.03 acres of impervious cover and 0.48 acres of managed turf. In the proposed condition, there will be 1.24 acres of impervious cover and 0.27 acres of managed turf. Per the Virginia Runoff Reduction Spreadsheet, this will require that 0.85 lbs. of phosphorus be removed per year. Nutrient credits will be purchased to meet stormwater quality requirements. Water Quantity In existing condition, about half of the site drains towards existing inlets/storm pipes adjacent to the southern property line, while the other half drains to Ivy Road. In the proposed condition, these drainage patterns will be maintained to the largest extent practical. 600 LF of 36" CMP detention pipe is being installed to meet water quantity requirements. The pipe reduces the 1-year, 24-hour storm to meet the requirements of the energy balance equation. Additionally, the 10-year, 24-hour storm is being detained to less than the pre -developed 10-year, 24 hour storm to meet flood protection requirements. LD-229 STORM SEWER DESIGN COMPUTATIONS STORM FREQUENCY 10 PROJECT: BEAVERCREEK LOCATION: CHARLOTTESVILLE, ALBEMARLE COUNTY COUNTY: Chad011e Ale Designed by: KAM Chetl d by: UNITS ENGLISH PIPE NO. FROM PORT TOM DRARJ. AREA 'A" Acre (3) RUNOFF COEFF. C. @1 CA INLET TIME M.W M RAIN FALL IM (S) RUNOFF RWERT ELEVATIONS LENGTH of Pipe Ft (12) SLOPE Flh[ (13) SIZE (1 i.Q SpN14tt) a (IC) SHAPE N-1— of Pigs CaWi, CFS (15) F,.- Slope Ft/Ft NORMAL FLOW FLOW TIME REMARKS (IS) MCRE-ACCUM- MENT (5) MATED (6) LaNN CPS To Q CFS (9) UPPER END (10) LOWER END (11) D'Oa Fho ,dn Ft A —of Fho ,An SgFI H. Ft Vn FU (16) En FL MCRE-ACCUMU MENT Mu s (17) -LAZED MVMes (17) REFERENCE (1) STA. REFERENCE (2) STA. 101 102 100 001 040 ON 000 sm 646 000 348 574 00 57389 12Q 000872 12 C-c I 3W 000850 079 067 ON 523 122 004 528 103 UG DET OU 102 000 000 000 500 000 000 348 571.50 574.00 6121 0WS17 12 C-¢ 1 349 000850 0.82 069 ON 507 122 020 520 201 202 UG DETM O38 087 033 033 500 654 000 2.17 514.91 574 W 82W 000500 12 C-¢ 1 2]) 0003N 067 056 029 3M 0% 036 536 "1 302 UG DETM 003 080 002 002 500 649 000 0.16 514 66 574 W 3099 000516 12 C-¢ 1 271 000000 0.16 009 0.10 192 022 027 527 A01 002 UG DETM 005 084 OR 003 500 654 000 028 571.80 574 W 5.93 005059 12 C-¢ 1 868 OOWN 0.12 006 008 503 052 002 502 501A EX 500 SOOB 019 064 0.12 012 500 654 000 0S0 564.70 5W.61 18% 000<76 15 C-¢ 1 4 46 OOOON 036 029 021 275 049 0.12 5.12 SOUR TRENCH SOOB 020 082 0.16 016 500 654 000 107 56704 56623 <0 a5 002002 12 CirtWnr I SC6 OOOOW 030 020 O.q 541 075 0.13 5.13 601 602 UG DETM 020 082 0.16 016 SW 65C OW 10] SW.BI 5]AW 620] 000C99 12 CirtWnr I 2D OOOOW OCa 033 023 2 W 0J2 532 70 70 000 000 043 Sal 64I OW 2W 564.06 56393 25R OWSM 95]01 011 112 SOB . . . 98 C_ I A9 000 12 0 069 033 415 % 0 4]03 1 008 0% 6 C- 00 061 0 509DI 501 0160%O . M 014 W5CWD2 0W W85 1 56500 3693 005009 1 8 CirtWnr I 29) OpOSW 026 0.13 0.1a ]d8 LI3 008 508 FORM LO 2O1 STORMWATER INLET COMPUTATIONS SHEET I OF ROU PROJECT BEAVER CREEK DESIGNER: NWA OATS C21120M CHECKED: UNITS UGLIER mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmm®mm®mmmmmmmm®mmmmmmmm®mom �mm�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmo®om�mmmm�mm®mmmmmmmmmmm��m� mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmm®�mmmmmmmmmmmamm®m®mm�mtm® mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmm®mmmmmmmm®mmmmmmm�mm mmm�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmm®mmmmmmmm®mmmmmmm�mm® �m®�mmm0000mmmmmmmmmmmmmmmmmmmmm��m mmm�®m�mmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmm®mmmmmmm�mtm® ®mm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m� mmm�mm�mmmmmmmmmmmmmmmmmmmmmmmmm��m� mmm�mmmmomommmmm®mmm®mmmmmmmmmmm��m� �mm�mm®mmmmmmmmmmmmmmmmmmmmmmmmm��m� mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m� mmm�mmmmomommm®m�mmm®mmmmmmmm®mm��m� mm®�mmm0000mmmmmmmmmmmmmmmmmmmmm��m� mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmmmmmmmmmmmmmmmmmmm��m mmm�mmmmomommmmmmmmmmmmmmmmmmmmm��m mmm�mmmmmmmmmmm®mmmmmmmm®mmmmmmmm®mom INLETSOFT BY ENSOFTEC DATE: 0/21=0 113 47 PROJECT: BEAVER CREEK DESIGNED BY: KAM HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 10 Year INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA PIPE Do (IrvYnn) DESIGN DISCH. (CFSICMSy LENGTH PIPE Lo (FNA) FRICTION SLOPE, Sb (FTIFT) (MM) FRICTION LOSS Hi (F11M) JUNCTION LOSS 05 HI FINAL H IF11M) InW WaW Sula¢ Ekvatian Top of NH TOP d INO El-. APPROX. Vo Cmtr. Ho (F11M) Vi Yi'Z2g Hi(Egn) 035-MA (Yitl3g) SKEW A,6 K SeN H (FUN) Sun HL (FNA)YIN(F-) 1 2 3 4 5 8 8 9 10 11 12 13 1/ 1 i J0.05YES 16 1 18 19 dOK. UG DET IN 576.000 602 574.500 1.00 576.000 12 1.073 62.07 0.00081 0.050 3.266 0.041 0.000 0.000 0.000 0.0 0.00 0.000 0.041 0.02] 0.0]] 5]6.0T 5T100 302 574.500 1.00 576.000 12 0.157 30.98 0.00002 0.001 1.917 0.014 0.000 0.000 0.000 0.0 0.00 0.000 0.014 0.156 0.019 YES 0.009 0.010 576.010 579.784 O.K. 202 574.500 1.00 576.000 12 2.165 82.06 0.00329 0.270 3.856 0.058 0.000 0.000 0.000 0.0 0.00 0.000 0.058 2.185 0.075 YES 0.038 0.30] 5]6.3W 5T190 O.K. 402 574.500 1.00 576.000 12 0.275 5.93 0.00005 0.000 5.034 0.098 0.000 1 0.000 0.000 0.0 0.00 0.000 0.098 0.275 1 0.128 VES 0.084 0.080 5]6.084 581.990 O.K. LD-347 PROJECT: BEAVER CREEK DESIGNED BY: KAM HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 10 Year INLET OR JUNCTON STA INVERT EL OUTFLOW PIPE DEPTH OF FLOW OUTFLOW PIPE WTIET WATER SURFACE ELF/ OW PIPE Do (IWmm) DESIGN DISCH. Do (CFMMS) LENGTH PIPE Ln (EMI) FRICTON SLOPE, SIo IFLFIj ("I FRIC➢ON LOSS M (PoM) JUNCTION LOSS SURFACE FLOW Odj.M 13 M (W InM Shaping] YIN 05 Ht (FUND FINAL H (PM) INH Water Su - Elevation Top oI MH Tpotl. Ekv. SPERM Adµsl-e V. C. Ho (PRIM) Yi Y'22g Hi(ExM) OS.mA%. (V'1 M SKEW A,6 K BaM H (FUND Sum HL IFLM) 1 2 3 4) 5) (6) (]) (8 9 10 (11) 12 (13 (14 15 (18 (18 17 18 19 100 574.250 102 573.750 1.00 574.550 12 3.480 12.62 0.00850 0.107 6.450 0.162 5.165 0.414 0.145 0.0 0.00 0.000 0.306 0.026 0.306 YES 0.153 0.260 574.810 5]8]50 O.K. UG DET OUT 513.980 1.00 574.810 12 3.480 61.21 0.00850 0.520 5.165 0.104 0.000 0.000 0.000 0.0 0.00 0.000 0.104 0.000 0.104 YES 0.052 0.572 575.382 579.500 O.K. 113 47 PROJECT: BEAVER CREEK DESIGNED BY: KAM HYDRAULIC GRADE LINE ANALYSIS Checked: INCIDENCE PROBABILITY 10 Year INLET OR JUNCTION STA. INVERT EL. OUTFLOW PIPE DEPTH OFFLOW OUTFLOW PIPE OUTLET WATER SURFACE ELEV. DIA PIPE Do (I.) DESIGN DISCH. Co (CFSICMS) LENGTH PIPE LO (FAR FRICTION SLOPE, Sb (FTIFT) (") FRICTION LOSS H1 (FVIA) JUNCTION LOSS 'j. Hl 13 Hl (FVM) InM Slhpingi YIN 05 Hl (FM) FINAL H (PWA) InM Wait Suia¢ Elevation Tcp o1 MIN TOP d INO El-. PPPRO%. Add nli Vo C. No (Ft" Yi Mi U, Hi(Egn) 035'NA(. (V=g) SKEW A,6 K Send! H (FUN) 1 2 3 4 5 8 8 9 10 11 12 13 1/ 18 18 1 18 19T00 4(FM)(FVM) 564.860 T02 563.930 1.25 564.930 15 2.803 25.52 0.0019T 0.050 3.938 0.060 4.152 0.268 0.094 0.0 0.00 (LORD 0.154 YES 0.0TT 0.12T 565.057 58T.620 O.K. 500B 564.160 1.25 565.160 15 2.803 70.32 0.00168 0.118 4.152 0.06T 5.405 0.454 0.159 0.0 0.00 (LORD 0.226 YES 0.113 0.231 565.391 5T0.790 O.K. EX500 564.610 1.25 565.610 15 0.798 18.90 0.00016 0.003 2.750 0.029 0.000 0.000 0.000 0.0 000 0000 0.038 YES 0.019 0.022 585.832 568.310 O.K. TRENCH 586.230 1.00 567.030 12 1 1.073 1 40.45 0.00081 0.033 5.405 0.113 0.000 0.000 0.000 0.0 0.00 0.000 0.113 1 1.073 1 0.147 YES 0.074 1 0.106 587.340 5n.740 O.K. Virginia Runoff Reduction Method Worksheet DEC, Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0 BMP Design Specifications List: 2013 Draft Stds & Specs Site Summary Project Title: Beaver Creek MOB Date: 43691 Total Rainfall (in): 43 Total Disturbed Acreage: 1.51 Site Land Cover Summary Pre-ReDevelopment Land Cover (acres) Asoils BSolls CSOIIS DSoils Totals %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf(acres) 0.00 0.00 0.00 0.48 0.48 32 Impervious Cover (acres) 0.00 0.00 0.00 1.03 1.03 68 1.51 100 Post-ReDevelopment Land Cover (acres) Asoils BSoils CSOIIs DSoils Totals %of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres)1 0.00 0.00 0.00 0.27 0.27 18 Impervious Cover (acres) 1 0.00 0.00 0.00 1.24 1.24 82 1.51 100 Site Tv and Land Cover Nutrient Loads Final Port -Development post- poll Adjusted Pre- (Post-ReDevelopment ReDevelopmem Developmentrvlous ReDevelopment &New Impervious) ) (New Impervious) Site Rv 0.82 0.80 0.95 0.80 Treatment Volume (fts) 4,521 3,797 724 3,797 TP Load(lb/yr) 2.84 2.39 0.46 2.39 Total TP Load Reduction Required (lb/yr) OAS 0.48 0.37 Final Post-Developmem Load (Post-ReDevelopment & New Impervious) Pre- ReDevelopment TN Load (Ib/yr) 20.32 17.92 Pre- ReDevelopment Final Post -Development Post-ReDevelopment TP TP Load per acre TP Load per acre Load per acre (lb/acre/yr) (lb/acre/yr) (lb/acre/yr) 1.84 1.88 1.84 Summary Print Virginia Runoff Reduction Method] Woftheet Site Compliance Summary Maximum% Reduction Required Below 20% Pre-ReDevelopment Load] Total Runoff Volume Reduction (k') 0 Total TP Load Reduction Achieved (lb/yr) 0.00 Total TN Load Reduction Achieved (lb/yr) 0.00 Remaining Post Development TP Load 2.84 (lb/yr) Remaining TP Load Reduction (lb/yr) 0.85 Required Summary Print VRRM_Ral Compliance_ Spreadsheet_0 OU017 Version 2.8 - June 2014 - 2011 BMP Sttls 8 Specs 1 Fixed summary shut - totals/percentage column fixed 2 Connected nitrogen etficieney percentages 3 Correctetl the RV value in column J for managed tuff 4 Checked am revised mom reduction credit values assigned Version 3.0 - 2011 and tlrsh 2013 BMP Still & Specs General 1 Amm err checks and user prompts to Site tab, DA tabs, ant Runoff Volume am CN tab for data input errs. 2 Various format changes thoughout the sprendsheet 3 Combined 2011 am 2013 BMP spreadsheets into one spreadsheet wMs a user selection option induced in Site tab. 4 Cast input cell color changed from cyan blue to green calculation cells changed her mid -grey to light grey; am added final result cell in indigo. Sol tab 5 Locked annual rainfall of 43 inches for use throughout Virginia since regulatory site basetl TP Intl limit is based on this value. 6 Counsel enor in formula for total phosponos load markets requirement. Previous formula was inconsistent xtlth 9VAC25-87063 A2 and under certain circumstances provide! consumers TP bard reduction requirement for development on prior developed lands. Addetl button am sism" (Ctd+Shift+R) to dear user inputs from all worksheets. 8 Added! shmcut (CtrI+Shl to Gear land cover data form Site tab. 9 Added! TP Baseline Load for adjusted pre-retlevelopement portion (cell C58). 10 Addetl note(tnggerel to appear when applicable) belay"Land Cover Summary for Radevelopeor- indicating that reduction below baseline TP Iuwtl(<0.41 larval not required as per 9VAC25-870-63. 11 Addetl enor meadoil when data input areas incomplete or not entered correcly. 12 Conditional formal (Summary sections gra lout)vmen input information incomplete or incorrect. 13 Added Pre -re levelopment and Post -development load in Ibs/assai (row 57) for additional comparison purposes 14 Connected err in excel formula for new impervious cover Rv. 15 Connected errors in excel formula for total site area and RVs in retlevelopment portion: enor appeared y4sen sal types change between pre-retlevelopment and postdvirgin entvirginnomp s net increases in iewn io increase 16 Added section for Final Post -Development to (and Cover Summaries to sbOw combination of redevelopment portion am new net impervious cover portion. 17 Added informal section in blue (columns B to F, rows 12-14) am imuVerror guide columns H to K, rows 12-14) to indicate to users upfront when new net impervious cover is bang triggered, sues 10 or 20%reductions are being utilized, am when data entry is completed correctly. 18 Added data entry instruction when user inputs Monk (row 8), 19 Added option for linear nevelopment projects (rov 6 and will D64G64) 20 Removed'protectnd" from pre-reduselopmeM land cover type foreoth tan space since this is only required! in post-development.(UBI222017) 21 Addetl enor neficationto side error miss if tom disturbed acreageenteretl is greater than postdevelopment area criossed.(08rz2201]) D.A tabs 22 Added Mi Hydrodynamic, Fifterpng, Senate. 23 Added Total BMP Treatment Volume(ft")'column. 24 Rearranged previous Turf and Impervious input rays to adjacent cells in same may n cards practice now local on 1 row only. 25 Consolidated BMP Probes heading and added (RR or no RR label) to each practice to deal those wOh am w9ndut Runt Reduction. 26 Added " Total Phosphoms Available for Removal in DA._(Ibs)'. 27 Added button to dear BMP cretltt areas entered for each p2Gice. 28 Addetl user prompts to assist wtth user -input Rainwater Harvesting moors mothers cretl0, and kill 29 Renamed Credit and PMsphorus/Mtrogen EMGency column headers to Runoff Removal Crndi[ and PhnphonoalNptrogen Removal Eficiency for dartty. 30 Removed -RW from Column headings referring to none volume and TP load from upstream practices (which may be RR or no rl tombless). 31 Renamed -10. Wet Swale (Costal Plain)" to'10. WG SsaW in BMP heading in order o improve clarity. The p2Gice is well suited for but not limited to the Coastal Plain, 39 Renamed'14. Manufactured BMW section M1eatling to-14. Manufactured Treatment Device's for consistency xfith Virginia BMP Clearinghouse. 33 Added! "Micro-Bporetemon #1- and "Micro-Bionetemon # -to Bioretemion headings (Bus and b.b on tab, respectively) from Since 9. 34 Replaced zem values her all data entry cells with blank cells, blocked out calculation and data entry cells where input or calculation are not applicable. Wall Quality Comp(pnee tab 35 Optimized and reorganized! for improved information output 36 Added! "Runoff Reduchon Volume and TP By Drainage Area". 37 Addetl section for linear development projects (rows 21-26) Rano#Vdume addCR tab 38 Reorganizetl and renamed Channel and Flood Protection tab to Runoff Voume am CN to more accurately reflect inhumation providetl. 39 Added user notes regarding limitations of Runoff Volume and CN tab for water quantity calculations. 40 Renamed CN.yyws to CNrow xs for the CNs based on soils and land over types for ach drainage area Summaryfab 41 Added "Print Preview' button. 42 Fixed nomme err in Summary tab update macro. 43 Added "BMP Treatment Volume", '7P Ford her Upstream p2Gil7P Removetl" and "FP remaining' columns to Summary tab. 44 Optimized macro efficiency am eliminated screen updatingMashing during macros. 45 Corrected Summary tab macro -Turf missing mmine missing"<>•, 46 Added additional pre and post site data onto Summary tab. 47 Added Error Summary Table to Summary tab (appears only eerss on Site tab or Drainage Area tabs are present) 48 Expanded and improved Runoff Coefficient am CN calculation section. 49 Added summary imomsation for linear projects, only populates if applicable. 50 Macro glitch vdth MS Excel 2016 corrected (OB/Y1J2017) 51 Added Project Title and Date from Site tab. (8Q22017) 1S j 3S > Pre -1 to POA1 Pre -2 to POA2 Pre -3 to POA3 Subcat Reach On Link Routing Diagram for Pre Prepared by Timmons Group, Printed 2/4/2020 FHydrOCAD@ 10.00-20 S/n 06538 02017 HydroCAD Software Solutions LLC Pre Prepared by Timmons Group Printed 2/4/2020 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.480 80 >75% Grass cover, Good, HSG D (1S, 2S, 3S) 1.030 98 Paved parking, HSG D (1S, 2S, 3S) iPi11131�1101Cd We1N=Fe1 Pre Prepared by Timmons Group Printed 2/4/2020 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 1.510 HSG D 1S, 2S, 3S 0.000 Other 1.510 TOTAL AREA Pre Prepared by Timmons Group Printed 2/4/2020 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.480 0.000 0.480 >75% Grass cover, Good 1S, 2S, 3S 0.000 0.000 0.000 1.030 0.000 1.030 Paved parking 1S, 2S, 3S 0.000 0.000 0.000 1.510 0.000 1.510 TOTAL AREA Pre Timmons Type 11 24-hr 1 YR Rainfall=3.04" Printed 2/4/2020 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre -1 to POA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>2.20" Tc=6.0 min CN=92 Runoff=2.10 cfs 0.106 of Subcatchment2S: Pre -2 to POA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>1.62" Flow Length=157' Slope=0.0600'/' Tc=7.5 min CN=85 Runoff=0.89 cfs 0.045 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% Impervious Runoff Depth>2.70" Tc=6.0 min CN=97 Runoff=2.47 cfs 0.135 of Total Runoff Area = 1.510 ac Runoff Volume = 0.285 of Average Runoff Depth = 2.27" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 1S: Pre -1 to POM Runoff = 2.10 cfs @ 11.97 hrs, Volume= 0.106 af, Depth> 2.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG D 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Pre -1 to POM Hydrograph ❑ Runoff 2 Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.580 ac Runoff Volume=0.106 of I� Runoff Depth>2.20" LL Tc=6.0 min I I H I CN=92 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 Time (hours) Pre Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 1S: Pre -1 to POA1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.01 0.00 6.25 0.26 0.01 0.01 6.50 0.27 0.01 0.01 6.75 0.29 0.01 0.01 7.00 0.30 0.02 0.01 7.25 0.32 0.02 0.01 7.50 0.33 0.02 0.01 7.75 0.35 0.03 0.01 8.00 0.36 0.03 0.01 8.25 0.38 0.04 0.01 8.50 0.40 0.05 0.02 8.75 0.42 0.06 0.02 9.00 0.45 0.07 0.02 9.25 0.47 0.08 0.02 9.50 0.50 0.09 0.03 9.75 0.52 0.10 0.03 10.00 0.55 0.11 0.03 10.25 0.58 0.13 0.04 10.50 0.62 0.15 0.05 10.75 0.66 0.18 0.06 11.00 0.71 0.21 0.07 11.25 0.78 0.25 0.10 11.50 0.86 0.30 0.13 11.75 1.18 0.54 0.65 12.00 2.02 1.25 1.97 12.25 2.15 1.37 0.27 12.50 2.23 1.45 0.17 12.75 2.30 1.50 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 1.55 0.11 13.25 2.39 1.59 0.09 13.50 2.43 1.63 0.08 13.75 2.46 1.66 0.07 14.00 2.49 1.69 0.06 14.25 2.52 1.71 0.06 14.50 2.55 1.74 0.06 14.75 2.57 1.76 0.05 15.00 2.59 1.78 0.05 15.25 2.62 1.80 0.05 15.50 2.64 1.82 0.04 15.75 2.66 1.84 0.04 16.00 2.68 1.86 0.04 16.25 2.69 1.87 0.04 16.50 2.71 1.89 0.04 16.75 2.73 1.90 0.04 17.00 2.74 1.92 0.03 17.25 2.76 1.93 0.03 17.50 2.77 1.95 0.03 17.75 2.79 1.96 0.03 18.00 2.80 1.97 0.03 18.25 2.81 1.99 0.03 18.50 2.83 2.00 0.03 18.75 2.84 2.01 0.03 19.00 2.85 2.02 0.03 19.25 2.86 2.03 0.03 19.50 2.87 2.04 0.02 19.75 2.88 2.05 0.02 20.00 2.89 2.06 0.02 20.25 2.90 2.07 0.02 20.50 2.91 2.08 0.02 20.75 2.92 2.09 0.02 21.00 2.93 2.10 0.02 21.25 2.94 2.11 0.02 21.50 2.95 2.12 0.02 21.75 2.96 2.12 0.02 22.00 2.97 2.13 0.02 22.25 2.98 2.14 0.02 22.50 2.99 2.15 0.02 22.75 3.00 2.16 0.02 23.00 3.01 2.17 0.02 23.25 3.01 2.17 0.02 23.50 3.02 2.18 0.02 23.75 3.03 2.19 0.02 24.00 3.04 2.20 0.02 Printed 2/4/2020 Pre Timmons Type 11 24-hr 1 YR Rainfall=3.04" Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 0.89 cfs @ 11.99 hrs, Volume= 0.045 af, Depth> 1.62" Printed 2/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG D 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph --- O F Cs 6 H 0.8 L J 1 YRLRainf 1[g3.04�,'- - RunoffAtea=(L33Gai,- 0.65- 0.6 Rgngff;VQly_mp=O:04$-0f tanoff ©eptFr>1:w'r2�' LL 0.45 a ------ Flow Length=15T- 0.4 - - - -, - -r -r ' Slonne.0 Q 0.3 0.25 ' 0.2 yp C N#8& 0.15 -r---� ----- 'r--i--- 'r-� ______ - T- 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Time (hours) ■ Runoff Pre Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.01 0.00 9.50 0.50 0.01 0.00 9.75 0.52 0.01 0.01 10.00 0.55 0.02 0.01 10.25 0.58 0.03 0.01 10.50 0.62 0.04 0.01 10.75 0.66 0.05 0.02 11.00 0.71 0.06 0.02 11.25 0.78 0.08 0.03 11.50 0.86 0.11 0.04 11.75 1.18 0.26 0.21 12.00 2.02 0.81 0.88 12.25 2.15 0.90 0.14 12.50 2.23 0.97 0.09 12.75 2.30 1.02 0.06 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 1.06 0.05 13.25 2.39 1.09 0.05 13.50 2.43 1.12 0.04 13.75 2.46 1.15 0.04 14.00 2.49 1.17 0.03 14.25 2.52 1.19 0.03 14.50 2.55 1.22 0.03 14.75 2.57 1.24 0.03 15.00 2.59 1.25 0.03 15.25 2.62 1.27 0.02 15.50 2.64 1.29 0.02 15.75 2.66 1.30 0.02 16.00 2.68 1.32 0.02 16.25 2.69 1.33 0.02 16.50 2.71 1.35 0.02 16.75 2.73 1.36 0.02 17.00 2.74 1.37 0.02 17.25 2.76 1.39 0.02 17.50 2.77 1.40 0.02 17.75 2.79 1.41 0.02 18.00 2.80 1.42 0.02 18.25 2.81 1.43 0.01 18.50 2.83 1.44 0.01 18.75 2.84 1.45 0.01 19.00 2.85 1.46 0.01 19.25 2.86 1.47 0.01 19.50 2.87 1.48 0.01 19.75 2.88 1.49 0.01 20.00 2.89 1.50 0.01 20.25 2.90 1.51 0.01 20.50 2.91 1.52 0.01 20.75 2.92 1.52 0.01 21.00 2.93 1.53 0.01 21.25 2.94 1.54 0.01 21.50 2.95 1.55 0.01 21.75 2.96 1.56 0.01 22.00 2.97 1.56 0.01 22.25 2.98 1.57 0.01 22.50 2.99 1.58 0.01 22.75 3.00 1.59 0.01 23.00 3.01 1.59 0.01 23.25 3.01 1.60 0.01 23.50 3.02 1.61 0.01 23.75 3.03 1.61 0.01 24.00 3.04 1.62 0.01 Printed 2/4/2020 Pre Type/1 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 3S: Pre -3 to POA3 Runoff = 2.47 cfs @ 11.96 hrs, Volume= 0.135 af, Depth> 2.70" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG D 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 i i i i i i i i i i i i i i i i i i i i i i i ■Runoff 2. :Type II', 24-Mr :1 YR Rainfall:;3.O411 2 : Runbff A00=0.600 ab ROngff', V910me=10.13$ elf kunoff bepih>2.70i' LL Tc=6.0 fnih N=97 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 Time (hours) Pre Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.01 0.01 3.25 0.11 0.01 0.01 3.50 0.13 0.01 0.01 3.75 0.14 0.01 0.01 4.00 0.15 0.02 0.01 4.25 0.16 0.02 0.01 4.50 0.17 0.03 0.01 4.75 0.18 0.03 0.01 5.00 0.19 0.04 0.01 5.25 0.20 0.04 0.02 5.50 0.22 0.05 0.02 5.75 0.23 0.06 0.02 6.00 0.24 0.07 0.02 6.25 0.26 0.08 0.02 6.50 0.27 0.08 0.02 6.75 0.29 0.09 0.02 7.00 0.30 0.10 0.02 7.25 0.32 0.11 0.03 7.50 0.33 0.13 0.03 7.75 0.35 0.14 0.03 8.00 0.36 0.15 0.03 8.25 0.38 0.16 0.03 8.50 0.40 0.18 0.04 8.75 0.42 0.19 0.04 9.00 0.45 0.21 0.05 9.25 0.47 0.23 0.05 9.50 0.50 0.25 0.05 9.75 0.52 0.27 0.05 10.00 0.55 0.30 0.06 10.25 0.58 0.33 0.07 10.50 0.62 0.36 0.08 10.75 0.66 0.40 0.09 11.00 0.71 0.44 0.11 11.25 0.78 0.50 0.14 11.50 0.86 0.58 0.19 11.75 1.18 0.87 0.85 12.00 2.02 1.69 2.28 12.25 2.15 1.82 0.30 12.50 2.23 1.90 0.20 12.75 2.30 1.96 0.14 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 2.01 0.12 13.25 2.39 2.06 0.10 13.50 2.43 2.09 0.09 13.75 2.46 2.13 0.08 14.00 2.49 2.16 0.07 14.25 2.52 2.18 0.07 14.50 2.55 2.21 0.06 14.75 2.57 2.23 0.06 15.00 2.59 2.26 0.06 15.25 2.62 2.28 0.05 15.50 2.64 2.30 0.05 15.75 2.66 2.32 0.05 16.00 2.68 2.34 0.04 16.25 2.69 2.35 0.04 16.50 2.71 2.37 0.04 16.75 2.73 2.39 0.04 17.00 2.74 2.40 0.04 17.25 2.76 2.42 0.04 17.50 2.77 2.43 0.04 17.75 2.79 2.45 0.03 18.00 2.80 2.46 0.03 18.25 2.81 2.47 0.03 18.50 2.83 2.49 0.03 18.75 2.84 2.50 0.03 19.00 2.85 2.51 0.03 19.25 2.86 2.52 0.03 19.50 2.87 2.53 0.03 19.75 2.88 2.54 0.03 20.00 2.89 2.55 0.02 20.25 2.90 2.56 0.02 20.50 2.91 2.57 0.02 20.75 2.92 2.58 0.02 21.00 2.93 2.59 0.02 21.25 2.94 2.60 0.02 21.50 2.95 2.61 0.02 21.75 2.96 2.62 0.02 22.00 2.97 2.63 0.02 22.25 2.98 2.64 0.02 22.50 2.99 2.65 0.02 22.75 3.00 2.66 0.02 23.00 3.01 2.66 0.02 23.25 3.01 2.67 0.02 23.50 3.02 2.68 0.02 23.75 3.03 2.69 0.02 24.00 3.04 2.70 0.02 Printed 2/4/2020 Pre Timmons Type 11 24-hr 2 YR Rainfall=3.68" Printed 2/4/2020 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre -1 to POA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth >2.81" Tc=6.0 min CN=92 Runoff=2.64 cfs 0.136 of Subcatchment2S: Pre -2 to POA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>2.17" Flow Length=157' Slope=0.06007 Tc=7.5 min CN=85 Runoff=1.18 cfs 0.060 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% Impervious Runoff Depth>3.33" Tc=6.0 min CN=97 Runoff=3.01 cfs 0.167 of Total Runoff Area = 1.510 ac Runoff Volume = 0.362 of Average Runoff Depth = 2.88" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 1S: Pre -1 to POM Runoff = 2.64 cfs @ 11.96 hrs, Volume= 0.136 af, Depth> 2.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG D 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Pre -1 to POM Hydrograph ❑ Runoff Type II 24-hr 2 YR Rainfall=3.68" 2 Runoff Area=0.580 ac Runoff Volume=0.136 of Runoff Depth>2.81" LL Tc=6.0 min CN=92 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 Time (hours) Pre Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 1S: Pre -1 to POA1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.01 0.00 5.50 0.26 0.01 0.01 5.75 0.28 0.01 0.01 6.00 0.29 0.01 0.01 6.25 0.31 0.02 0.01 6.50 0.33 0.02 0.01 6.75 0.35 0.03 0.01 7.00 0.36 0.03 0.01 7.25 0.38 0.04 0.01 7.50 0.40 0.05 0.02 7.75 0.42 0.05 0.02 8.00 0.44 0.06 0.02 8.25 0.46 0.07 0.02 8.50 0.49 0.08 0.03 8.75 0.51 0.09 0.03 9.00 0.54 0.11 0.03 9.25 0.57 0.12 0.04 9.50 0.60 0.14 0.04 9.75 0.63 0.16 0.04 10.00 0.67 0.18 0.05 10.25 0.71 0.20 0.06 10.50 0.75 0.23 0.07 10.75 0.80 0.26 0.08 11.00 0.86 0.31 0.10 11.25 0.94 0.36 0.13 11.50 1.04 0.43 0.18 11.75 1.42 0.74 0.85 12.00 2.44 1.64 2.47 12.25 2.60 1.78 0.34 12.50 2.70 1.88 0.22 12.75 2.78 1.95 0.16 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 2.01 0.13 13.25 2.89 2.06 0.11 13.50 2.94 2.10 0.10 13.75 2.98 2.14 0.09 14.00 3.02 2.18 0.08 14.25 3.05 2.21 0.07 14.50 3.08 2.24 0.07 14.75 3.11 2.27 0.07 15.00 3.14 2.29 0.06 15.25 3.17 2.32 0.06 15.50 3.19 2.34 0.06 15.75 3.22 2.37 0.05 16.00 3.24 2.39 0.05 16.25 3.26 2.41 0.05 16.50 3.28 2.43 0.05 16.75 3.30 2.45 0.04 17.00 3.32 2.46 0.04 17.25 3.34 2.48 0.04 17.50 3.36 2.50 0.04 17.75 3.37 2.51 0.04 18.00 3.39 2.53 0.04 18.25 3.41 2.55 0.04 18.50 3.42 2.56 0.03 18.75 3.44 2.58 0.03 19.00 3.45 2.59 0.03 19.25 3.46 2.60 0.03 19.50 3.48 2.62 0.03 19.75 3.49 2.63 0.03 20.00 3.50 2.64 0.03 20.25 3.52 2.65 0.03 20.50 3.53 2.66 0.03 20.75 3.54 2.67 0.03 21.00 3.55 2.68 0.03 21.25 3.56 2.70 0.03 21.50 3.57 2.71 0.03 21.75 3.58 2.72 0.03 22.00 3.60 2.73 0.02 22.25 3.61 2.74 0.02 22.50 3.62 2.75 0.02 22.75 3.63 2.76 0.02 23.00 3.64 2.77 0.02 23.25 3.65 2.78 0.02 23.50 3.66 2.79 0.02 23.75 3.67 2.80 0.02 24.00 3.68 2.81 0.02 Printed 2/4/2020 Pre Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 1.18 cfs @ 11.99 hrs, Volume= 0.060 af, Depth> 2.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG D 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total i Subcatchment 2S: Pre -2 to POA2 Hydrograph Type II 24-hr - --2 YR Rainfall=3.68" Runoff Area=0.330 ac Runoff Volume=0.060 of Runoff Depth>2.17" Flow Length=157' Slope=0.0600 T Tc=7.5 min CN=85 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Pre Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.01 0.00 8.50 0.49 0.01 0.00 8.75 0.51 0.01 0.01 9.00 0.54 0.02 0.01 9.25 0.57 0.02 0.01 9.50 0.60 0.03 0.01 9.75 0.63 0.04 0.01 10.00 0.67 0.05 0.01 10.25 0.71 0.06 0.02 10.50 0.75 0.07 0.02 10.75 0.80 0.09 0.02 11.00 0.86 0.12 0.03 11.25 0.94 0.15 0.04 11.50 1.04 0.19 0.06 11.75 1.42 0.40 0.30 12.00 2.44 1.13 1.17 12.25 2.60 1.26 0.18 12.50 2.70 1.34 0.11 12.75 2.78 1.40 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 1.46 0.07 13.25 2.89 1.50 0.06 13.50 2.94 1.54 0.05 13.75 2.98 1.57 0.05 14.00 3.02 1.60 0.04 14.25 3.05 1.63 0.04 14.50 3.08 1.66 0.04 14.75 3.11 1.68 0.03 15.00 3.14 1.71 0.03 15.25 3.17 1.73 0.03 15.50 3.19 1.75 0.03 15.75 3.22 1.77 0.03 16.00 3.24 1.79 0.02 16.25 3.26 1.81 0.02 16.50 3.28 1.83 0.02 16.75 3.30 1.84 0.02 17.00 3.32 1.86 0.02 17.25 3.34 1.88 0.02 17.50 3.36 1.89 0.02 17.75 3.37 1.91 0.02 18.00 3.39 1.92 0.02 18.25 3.41 1.93 0.02 18.50 3.42 1.95 0.02 18.75 3.44 1.96 0.02 19.00 3.45 1.97 0.02 19.25 3.46 1.99 0.02 19.50 3.48 2.00 0.02 19.75 3.49 2.01 0.01 20.00 3.50 2.02 0.01 20.25 3.52 2.03 0.01 20.50 3.53 2.04 0.01 20.75 3.54 2.05 0.01 21.00 3.55 2.06 0.01 21.25 3.56 2.07 0.01 21.50 3.57 2.08 0.01 21.75 3.58 2.09 0.01 22.00 3.60 2.10 0.01 22.25 3.61 2.11 0.01 22.50 3.62 2.12 0.01 22.75 3.63 2.13 0.01 23.00 3.64 2.14 0.01 23.25 3.65 2.15 0.01 23.50 3.66 2.16 0.01 23.75 3.67 2.17 0.01 24.00 3.68 2.17 0.01 Printed 2/4/2020 Pre Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 3S: Pre -3 to POA3 Runoff = 3.01 cfs @ 11.96 hrs, Volume= 0.167 af, Depth> 3.33" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG D 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 I I I I I I I I I I I I I I I I I I I I I I I ■ RunoH 3 :Type II'124-Mr I I I I I I I I I I I 2 YR Rainfall:;3.681' I I I I I I I I I I Runbff Ater&0.6OO alp I I I I I I I I I 2 �nff'I�h#m�O�f kunoff Depth>3.33� 3 I I I I I I I I I I I LL Tc=6.0 linih I I I I I I I I I I I I I I I I I I I I I I N=gl 1 I I I 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 Time (hours) Pre Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.01 2.75 0.12 0.01 0.01 3.00 0.13 0.01 0.01 3.25 0.14 0.02 0.01 3.50 0.15 0.02 0.01 3.75 0.16 0.03 0.01 4.00 0.18 0.03 0.01 4.25 0.19 0.04 0.02 4.50 0.20 0.04 0.02 4.75 0.22 0.05 0.02 5.00 0.23 0.06 0.02 5.25 0.25 0.07 0.02 5.50 0.26 0.08 0.02 5.75 0.28 0.09 0.02 6.00 0.29 0.10 0.03 6.25 0.31 0.11 0.03 6.50 0.33 0.12 0.03 6.75 0.35 0.14 0.03 7.00 0.36 0.15 0.03 7.25 0.38 0.16 0.03 7.50 0.40 0.18 0.04 7.75 0.42 0.19 0.04 8.00 0.44 0.21 0.04 8.25 0.46 0.23 0.04 8.50 0.49 0.25 0.05 8.75 0.51 0.27 0.05 9.00 0.54 0.29 0.06 9.25 0.57 0.32 0.06 9.50 0.60 0.34 0.06 9.75 0.63 0.37 0.07 10.00 0.67 0.40 0.08 10.25 0.71 0.43 0.09 10.50 0.75 0.48 0.10 10.75 0.80 0.52 0.12 11.00 0.86 0.58 0.14 11.25 0.94 0.65 0.18 11.50 1.04 0.74 0.23 11.75 1.42 1.11 1.05 12.00 2.44 2.10 2.78 12.25 2.60 2.26 0.37 12.50 2.70 2.37 0.24 12.75 2.78 2.44 0.17 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 2.50 0.15 13.25 2.89 2.55 0.12 13.50 2.94 2.60 0.11 13.75 2.98 2.64 0.10 14.00 3.02 2.68 0.09 14.25 3.05 2.71 0.08 14.50 3.08 2.74 0.08 14.75 3.11 2.77 0.07 15.00 3.14 2.80 0.07 15.25 3.17 2.82 0.06 15.50 3.19 2.85 0.06 15.75 3.22 2.87 0.06 16.00 3.24 2.89 0.05 16.25 3.26 2.92 0.05 16.50 3.28 2.94 0.05 16.75 3.30 2.96 0.05 17.00 3.32 2.97 0.05 17.25 3.34 2.99 0.04 17.50 3.36 3.01 0.04 17.75 3.37 3.03 0.04 18.00 3.39 3.04 0.04 18.25 3.41 3.06 0.04 18.50 3.42 3.08 0.04 18.75 3.44 3.09 0.04 19.00 3.45 3.11 0.03 19.25 3.46 3.12 0.03 19.50 3.48 3.13 0.03 19.75 3.49 3.15 0.03 20.00 3.50 3.16 0.03 20.25 3.52 3.17 0.03 20.50 3.53 3.18 0.03 20.75 3.54 3.19 0.03 21.00 3.55 3.20 0.03 21.25 3.56 3.22 0.03 21.50 3.57 3.23 0.03 21.75 3.58 3.24 0.03 22.00 3.60 3.25 0.03 22.25 3.61 3.26 0.03 22.50 3.62 3.27 0.03 22.75 3.63 3.28 0.03 23.00 3.64 3.29 0.03 23.25 3.65 3.30 0.03 23.50 3.66 3.31 0.02 23.75 3.67 3.32 0.02 24.00 3.68 3.33 0.02 Printed 2/4/2020 Pre Timmons Type II 24-hr 10 YR Rainfall=5.57" Printed 2/4/2020 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre -1 to POA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>4.64" Tc=6.0 min CN=92 Runoff=4.23 cfs 0.224 of Subcatchment2S: Pre -2 to POA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth>3.89" Flow Length=157' Slope=0.0600 7 Tc=7.5 min CN=85 Runoff=2.06 cfs 0.107 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% Impervious Runoff Depth >5.21" Tc=6.0 min CN=97 Runoff=4.61 cfs 0.261 of Total Runoff Area = 1.510 ac Runoff Volume = 0.592 of Average Runoff Depth = 4.70" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type 11 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 1 S: Pre -1 to POA7 Runoff = 4.23 cfs @ 11.96 hrs, Volume= 0.224 af, Depth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG D 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft)(ft/sec)(cfs) 6.0 Direct Entry, Subcatchment 1S: Pre -1 to POA1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ■ RunoR I I I I I I I I I 42'j Cra I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I �r- 4 1O YR Rainfall:;5.57"' I I I I I I I I I I Rwnbff Are&0.58O ad 3 ROnpff'I V910me='1O.224 elf Runoff bipih>4.641' I I I I I I I I _ J--�- c1 LL 2 - •I I I I I N=9 I I I 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 Time (hours) Pre Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 1S: Pre -1 to POA1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.01 0.01 4.00 0.27 0.01 0.01 4.25 0.29 0.01 0.01 4.50 0.31 0.02 0.01 4.75 0.33 0.02 0.01 5.00 0.35 0.03 0.02 5.25 0.37 0.04 0.02 5.50 0.40 0.05 0.02 5.75 0.42 0.05 0.02 6.00 0.45 0.06 0.02 6.25 0.47 0.08 0.03 6.50 0.50 0.09 0.03 6.75 0.52 0.10 0.03 7.00 0.55 0.11 0.03 7.25 0.58 0.13 0.03 7.50 0.61 0.14 0.04 7.75 0.64 0.16 0.04 8.00 0.67 0.18 0.04 8.25 0.70 0.20 0.05 8.50 0.74 0.22 0.05 8.75 0.78 0.25 0.06 9.00 0.82 0.27 0.07 9.25 0.86 0.30 0.07 9.50 0.91 0.34 0.07 9.75 0.96 0.37 0.08 10.00 1.01 0.41 0.09 10.25 1.07 0.45 0.11 10.50 1.14 0.51 0.12 10.75 1.22 0.57 0.15 11.00 1.31 0.64 0.18 11.25 1.43 0.74 0.23 11.50 1.58 0.87 0.31 11.75 2.16 1.38 1.42 12.00 3.69 2.82 3.93 12.25 3.93 3.05 0.53 12.50 4.09 3.21 0.34 12.75 4.21 3.32 0.25 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 3.41 0.21 13.25 4.38 3.49 0.18 13.50 4.45 3.55 0.16 13.75 4.51 3.61 0.14 14.00 4.57 3.67 0.12 14.25 4.62 3.72 0.11 14.50 4.67 3.76 0.11 14.75 4.71 3.81 0.10 15.00 4.75 3.85 0.10 15.25 4.79 3.89 0.09 15.50 4.83 3.93 0.09 15.75 4.87 3.96 0.08 16.00 4.90 3.99 0.08 16.25 4.93 4.02 0.07 16.50 4.96 4.05 0.07 16.75 4.99 4.08 0.07 17.00 5.02 4.11 0.07 17.25 5.05 4.14 0.06 17.50 5.08 4.17 0.06 17.75 5.10 4.19 0.06 18.00 5.13 4.22 0.06 18.25 5.15 4.24 0.06 18.50 5.18 4.26 0.05 18.75 5.20 4.29 0.05 19.00 5.22 4.31 0.05 19.25 5.24 4.33 0.05 19.50 5.26 4.35 0.05 19.75 5.28 4.37 0.04 20.00 5.30 4.39 0.04 20.25 5.32 4.40 0.04 20.50 5.34 4.42 0.04 20.75 5.36 4.44 0.04 21.00 5.37 4.45 0.04 21.25 5.39 4.47 0.04 21.50 5.41 4.49 0.04 21.75 5.43 4.51 0.04 22.00 5.44 4.52 0.04 22.25 5.46 4.54 0.04 22.50 5.47 4.55 0.04 22.75 5.49 4.57 0.04 23.00 5.51 4.59 0.04 23.25 5.52 4.60 0.04 23.50 5.54 4.62 0.04 23.75 5.55 4.63 0.04 24.00 5.57 4.65 0.04 Printed 2/4/2020 Pre Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 2.06 cfs @ 11.99 hrs, Volume= 0.107 af, Depth> 3.89" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG D 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 2 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.330 ac Runoff Volume=0.107 of Runoff Depth>3.89" Flow Length=157' Slope=0.0600 T Tc=7.5 min CN=85 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 21 Time (hours) ❑ Runoff Pre Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.01 0.00 6.50 0.50 0.01 0.00 6.75 0.52 0.02 0.01 7.00 0.55 0.02 0.01 7.25 0.58 0.03 0.01 7.50 0.61 0.03 0.01 7.75 0.64 0.04 0.01 8.00 0.67 0.05 0.01 8.25 0.70 0.06 0.01 8.50 0.74 0.07 0.02 8.75 0.78 0.08 0.02 9.00 0.82 0.10 0.02 9.25 0.86 0.11 0.02 9.50 0.91 0.13 0.02 9.75 0.96 0.15 0.03 10.00 1.01 0.18 0.03 10.25 1.07 0.21 0.04 10.50 1.14 0.24 0.05 10.75 1.22 0.28 0.06 11.00 1.31 0.34 0.07 11.25 1.43 0.41 0.09 11.50 1.58 0.50 0.13 11.75 2.16 0.91 0.58 12.00 3.69 2.19 2.04 12.25 3.93 2.40 0.31 12.50 4.09 2.54 0.19 12.75 4.21 2.64 0.13 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 2.73 0.11 13.25 4.38 2.80 0.10 13.50 4.45 2.86 0.08 13.75 4.51 2.92 0.07 14.00 4.57 2.97 0.07 14.25 4.62 3.02 0.06 14.50 4.67 3.06 0.06 14.75 4.71 3.10 0.06 15.00 4.75 3.14 0.05 15.25 4.79 3.18 0.05 15.50 4.83 3.21 0.05 15.75 4.87 3.25 0.04 16.00 4.90 3.28 0.04 16.25 4.93 3.31 0.04 16.50 4.96 3.33 0.04 16.75 4.99 3.36 0.04 17.00 5.02 3.39 0.04 17.25 5.05 3.42 0.03 17.50 5.08 3.44 0.03 17.75 5.10 3.46 0.03 18.00 5.13 3.49 0.03 18.25 5.15 3.51 0.03 18.50 5.18 3.53 0.03 18.75 5.20 3.55 0.03 19.00 5.22 3.57 0.03 19.25 5.24 3.59 0.03 19.50 5.26 3.61 0.03 19.75 5.28 3.63 0.02 20.00 5.30 3.65 0.02 20.25 5.32 3.67 0.02 20.50 5.34 3.68 0.02 20.75 5.36 3.70 0.02 21.00 5.37 3.71 0.02 21.25 5.39 3.73 0.02 21.50 5.41 3.75 0.02 21.75 5.43 3.76 0.02 22.00 5.44 3.78 0.02 22.25 5.46 3.79 0.02 22.50 5.47 3.81 0.02 22.75 5.49 3.82 0.02 23.00 5.51 3.84 0.02 23.25 5.52 3.85 0.02 23.50 5.54 3.87 0.02 23.75 5.55 3.88 0.02 24.00 5.57 3.90 0.02 Printed 2/4/2020 Pre Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 3S: Pre -3 to POA3 Runoff = 4.61 cfs @ 11.96 hrs, Volume= 0.261 af, Depth> 5.21" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG D 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 Hydrograph ❑ Runoff Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.600 ac Runoff Volume=0.261 of Runoff Depth>5.21" Tc=6.0 min CN=97 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 Time (hours) Pre Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.01 0.01 2.00 0.12 0.01 0.01 2.25 0.14 0.02 0.01 2.50 0.16 0.02 0.02 2.75 0.17 0.03 0.02 3.00 0.19 0.04 0.02 3.25 0.21 0.05 0.02 3.50 0.23 0.06 0.03 3.75 0.25 0.07 0.03 4.00 0.27 0.08 0.03 4.25 0.29 0.09 0.03 4.50 0.31 0.11 0.03 4.75 0.33 0.12 0.04 5.00 0.35 0.14 0.04 5.25 0.37 0.16 0.04 5.50 0.40 0.17 0.04 5.75 0.42 0.19 0.05 6.00 0.45 0.21 0.05 6.25 0.47 0.23 0.05 6.50 0.50 0.25 0.05 6.75 0.52 0.28 0.05 7.00 0.55 0.30 0.06 7.25 0.58 0.32 0.06 7.50 0.61 0.35 0.06 7.75 0.64 0.37 0.06 8.00 0.67 0.40 0.06 8.25 0.70 0.43 0.07 8.50 0.74 0.46 0.08 8.75 0.78 0.50 0.09 9.00 0.82 0.54 0.10 9.25 0.86 0.58 0.10 9.50 0.91 0.62 0.10 9.75 0.96 0.66 0.11 10.00 1.01 0.71 0.12 10.25 1.07 0.77 0.14 10.50 1.14 0.83 0.16 10.75 1.22 0.91 0.19 11.00 1.31 1.00 0.22 11.25 1.43 1.11 0.28 11.50 1.58 1.26 0.36 11.75 2.16 1.82 1.63 12.00 3.69 3.35 4.25 12.25 3.93 3.58 0.57 12.50 4.09 3.74 0.36 12.75 4.21 3.86 0.26 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 3.95 0.22 13.25 4.38 4.03 0.19 13.50 4.45 4.10 0.17 13.75 4.51 4.16 0.15 14.00 4.57 4.22 0.13 14.25 4.62 4.27 0.12 14.50 4.67 4.31 0.11 14.75 4.71 4.36 0.11 15.00 4.75 4.40 0.10 15.25 4.79 4.44 0.10 15.50 4.83 4.48 0.09 15.75 4.87 4.52 0.09 16.00 4.90 4.55 0.08 16.25 4.93 4.58 0.08 16.50 4.96 4.61 0.07 16.75 4.99 4.64 0.07 17.00 5.02 4.67 0.07 17.25 5.05 4.70 0.07 17.50 5.08 4.72 0.07 17.75 5.10 4.75 0.06 18.00 5.13 4.78 0.06 18.25 5.15 4.80 0.06 18.50 5.18 4.82 0.06 18.75 5.20 4.85 0.05 19.00 5.22 4.87 0.05 19.25 5.24 4.89 0.05 19.50 5.26 4.91 0.05 19.75 5.28 4.93 0.05 20.00 5.30 4.95 0.04 20.25 5.32 4.97 0.04 20.50 5.34 4.98 0.04 20.75 5.36 5.00 0.04 21.00 5.37 5.02 0.04 21.25 5.39 5.04 0.04 21.50 5.41 5.05 0.04 21.75 5.43 5.07 0.04 22.00 5.44 5.09 0.04 22.25 5.46 5.10 0.04 22.50 5.47 5.12 0.04 22.75 5.49 5.14 0.04 23.00 5.51 5.15 0.04 23.25 5.52 5.17 0.04 23.50 5.54 5.18 0.04 23.75 5.55 5.20 0.04 24.00 5.57 5.22 0.04 Printed 2/4/2020 Pre Timmons Type 11 24-hr 100 YR Rainfall=9.14" Printed 2/4/2020 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre -1 to POA1 Runoff Area=0.580 ac 67.24% Impervious Runoff Depth>8.17" Tc=6.0 min CN=92 Runoff=7.19 cfs 0.395 of Subcatchment2S: Pre -2 to POA2 Runoff Area=0.330 ac 27.27% Impervious Runoff Depth >7.31" Flow Length=157' Slope=0.0600'/' Tc=7.5 min CN=85 Runoff=3.73 cfs 0.201 of Subcatchment3S: Pre -3 to POA3 Runoff Area=0.600 ac 91.67% Impervious Runoff Depth>8.77" Tc=6.0 min CN=97 Runoff=7.60 cfs 0.439 of Total Runoff Area = 1.510 ac Runoff Volume = 1.034 of Average Runoff Depth = 8.22" 31.79% Pervious = 0.480 ac 68.21% Impervious = 1.030 ac Pre Type/1 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 1 S: Pre -1 to POA7 Runoff = 7.19 cfs @ 11.96 hrs, Volume= 0.395 af, Depth> 8.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.390 98 Paved parking, HSG D 0.580 92 Weighted Average 0.190 32.76% Pervious Area 0.390 67.24% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Pre -1 to POA1 I I I I I I I I I I I I I I I I I I I 6 I I I I I I I I I I I I I I I I I I I I ■ Ruooff I I I I I I I I I I I I ]19 Ch I I I I I I I I I I I ,I ;Type II', 2-Mr 7 I I I I I I I I I I I I 7--r--I1-00---YR-RainfallT9a14" 6 I Runbff Areti=0.580 ad 5 ROngff',Vg10me=0.$9$ of I I I I I I I --Aunoff Npfh>8.1T1' 4/ I I I I I I I I I I I I I I I I I Tc-6.0 fnih I I I I I I I I I I I I I I 3 N=9 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 2 - I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I 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 Time (hours) Pre Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 1S: Pre -1 to POA1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.01 2.50 0.26 0.01 0.01 2.75 0.29 0.01 0.01 3.00 0.32 0.02 0.02 3.25 0.35 0.03 0.02 3.50 0.38 0.04 0.02 3.75 0.41 0.05 0.03 4.00 0.44 0.06 0.03 4.25 0.47 0.08 0.03 4.50 0.50 0.09 0.04 4.75 0.54 0.11 0.04 5.00 0.58 0.13 0.04 5.25 0.61 0.15 0.05 5.50 0.65 0.17 0.05 5.75 0.69 0.19 0.06 6.00 0.73 0.22 0.06 6.25 0.77 0.24 0.06 6.50 0.82 0.27 0.07 6.75 0.86 0.30 0.07 7.00 0.90 0.33 0.07 7.25 0.95 0.37 0.08 7.50 1.00 0.40 0.08 7.75 1.05 0.44 0.08 8.00 1.10 0.48 0.09 8.25 1.15 0.52 0.10 8.50 1.21 0.56 0.11 8.75 1.27 0.61 0.12 9.00 1.34 0.67 0.14 9.25 1.42 0.73 0.14 9.50 1.49 0.79 0.14 9.75 1.57 0.86 0.16 10.00 1.65 0.93 0.18 10.25 1.75 1.02 0.20 10.50 1.86 1.12 0.23 10.75 1.99 1.23 0.28 11.00 2.15 1.37 0.33 11.25 2.34 1.55 0.43 11.50 2.59 1.77 0.55 11.75 3.54 2.67 2.50 12.00 6.06 5.13 6.65 12.25 6.45 5.52 0.89 12.50 6.72 5.78 0.57 12.75 6.90 5.96 0.42 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 6.11 0.35 13.25 7.19 6.24 0.30 13.50 7.30 6.35 0.26 13.75 7.40 6.45 0.23 14.00 7.49 6.54 0.21 14.25 7.58 6.63 0.19 14.50 7.66 6.70 0.18 14.75 7.73 6.78 0.17 15.00 7.80 6.85 0.16 15.25 7.87 6.91 0.15 15.50 7.93 6.97 0.14 15.75 7.99 7.03 0.13 16.00 8.04 7.09 0.13 16.25 8.10 7.14 0.12 16.50 8.15 7.19 0.12 16.75 8.19 7.24 0.11 17.00 8.24 7.28 0.11 17.25 8.29 7.33 0.11 17.50 8.33 7.37 0.10 17.75 8.38 7.42 0.10 18.00 8.42 7.46 0.10 18.25 8.46 7.50 0.09 18.50 8.50 7.54 0.09 18.75 8.53 7.57 0.09 19.00 8.57 7.61 0.08 19.25 8.61 7.64 0.08 19.50 8.64 7.68 0.08 19.75 8.67 7.71 0.07 20.00 8.70 7.74 0.07 20.25 8.73 7.77 0.07 20.50 8.76 7.80 0.07 20.75 8.79 7.83 0.07 21.00 8.82 7.85 0.07 21.25 8.85 7.88 0.07 21.50 8.87 7.91 0.07 21.75 8.90 7.94 0.06 22.00 8.93 7.96 0.06 22.25 8.96 7.99 0.06 22.50 8.98 8.02 0.06 22.75 9.01 8.05 0.06 23.00 9.04 8.07 0.06 23.25 9.06 8.10 0.06 23.50 9.09 8.12 0.06 23.75 9.11 8.15 0.06 24.00 9.14 8.17 0.06 Printed 2/4/2020 Pre Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 2S: Pre -2 to POA2 Runoff = 3.73 cfs @ 11.98 hrs, Volume= 0.201 af, Depth> 7.31" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.240 80 >75% Grass cover, Good, HSG D 0.090 98 Paved parking, HSG D 0.330 85 Weighted Average 0.240 72.73% Pervious Area 0.090 27.27% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.3 132 0.0600 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.70" 0.2 25 0.0600 1.74 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.70" 7.5 157 Total Subcatchment 2S: Pre -2 to POA2 Hydrograph 4 373 h Type II 24-hr 100 YR Rainfall=9.14" 3 Runoff Area=0.330 ac Runoff Volume=0.201 of Runoff Depth>7.31" 0 2 Flow Length=157' Slope=0.0600 T Tc=7.5 min CN=85 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 Time (hours) ❑ Runoff Pre Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 2S: Pre -2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.01 0.00 4.50 0.50 0.01 0.01 4.75 0.54 0.02 0.01 5.00 0.58 0.02 0.01 5.25 0.61 0.03 0.01 5.50 0.65 0.04 0.01 5.75 0.69 0.05 0.01 6.00 0.73 0.07 0.02 6.25 0.77 0.08 0.02 6.50 0.82 0.10 0.02 6.75 0.86 0.11 0.02 7.00 0.90 0.13 0.02 7.25 0.95 0.15 0.03 7.50 1.00 0.17 0.03 7.75 1.05 0.20 0.03 8.00 1.10 0.22 0.03 8.25 1.15 0.25 0.04 8.50 1.21 0.28 0.04 8.75 1.27 0.32 0.05 9.00 1.34 0.36 0.05 9.25 1.42 0.40 0.06 9.50 1.49 0.45 0.06 9.75 1.57 0.50 0.07 10.00 1.65 0.55 0.08 10.25 1.75 0.62 0.09 10.50 1.86 0.70 0.10 10.75 1.99 0.79 0.13 11.00 2.15 0.91 0.15 11.25 2.34 1.05 0.20 11.50 2.59 1.25 0.26 11.75 3.54 2.05 1.13 12.00 6.06 4.36 3.67 12.25 6.45 4.73 0.54 12.50 6.72 4.98 0.33 12.75 6.90 5.16 0.23 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 5.31 0.19 13.25 7.19 5.43 0.17 13.50 7.30 5.54 0.15 13.75 7.40 5.64 0.13 14.00 7.49 5.73 0.11 14.25 7.58 5.81 0.11 14.50 7.66 5.88 0.10 14.75 7.73 5.95 0.10 15.00 7.80 6.02 0.09 15.25 7.87 6.09 0.09 15.50 7.93 6.15 0.08 15.75 7.99 6.20 0.07 16.00 8.04 6.25 0.07 16.25 8.10 6.30 0.07 16.50 8.15 6.35 0.06 16.75 8.19 6.40 0.06 17.00 8.24 6.45 0.06 17.25 8.29 6.49 0.06 17.50 8.33 6.53 0.06 17.75 8.38 6.58 0.06 18.00 8.42 6.62 0.05 18.25 8.46 6.66 0.05 18.50 8.50 6.69 0.05 18.75 8.53 6.73 0.05 19.00 8.57 6.77 0.05 19.25 8.61 6.80 0.04 19.50 8.64 6.83 0.04 19.75 8.67 6.86 0.04 20.00 8.70 6.89 0.04 20.25 8.73 6.92 0.04 20.50 8.76 6.95 0.04 20.75 8.79 6.98 0.04 21.00 8.82 7.00 0.04 21.25 8.85 7.03 0.04 21.50 8.87 7.06 0.04 21.75 8.90 7.09 0.04 22.00 8.93 7.11 0.04 22.25 8.96 7.14 0.04 22.50 8.98 7.17 0.03 22.75 9.01 7.19 0.03 23.00 9.04 7.22 0.03 23.25 9.06 7.24 0.03 23.50 9.09 7.27 0.03 23.75 9.11 7.29 0.03 24.00 9.14 7.32 0.03 Printed 2/4/2020 Pre Timmons Type/1 24-hr 100 YR Rainfall=9.14" Summary for Subcatchment 3S: Pre -3 to POA3 Runoff = 7.60 cfs @ 11.96 hrs, Volume= 0.439 af, Depth> 8.77" Printed 2/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.550 98 Paved parking, HSG D 0.600 97 Weighted Average 0.050 8.33% Pervious Area 0.550 91.67% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: Pre -3 to POA3 - __'__`__`__�___�___�__ ■Runoff 8 7mc I I ' Type M 24-1hr_ 7 :100 YR Rainfall:;9.141 6 Rwnbff Are&0.600 at; ----'-- R4n1pff:V014m;D=03$-4f- 5 -- ktuno-ff-;Depih>8J7i'_ �- ,� Tc76.0 fnih 4 3 I\= 2. 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 Time (hours) Pre Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 3S: Pre -3 to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.01 1.25 0.12 0.01 0.02 1.50 0.15 0.02 0.02 1.75 0.17 0.03 0.03 2.00 0.20 0.04 0.03 2.25 0.23 0.06 0.04 2.50 0.26 0.08 0.04 2.75 0.29 0.09 0.05 3.00 0.32 0.11 0.05 3.25 0.35 0.14 0.05 3.50 0.38 0.16 0.06 3.75 0.41 0.18 0.06 4.00 0.44 0.21 0.06 4.25 0.47 0.23 0.06 4.50 0.50 0.26 0.07 4.75 0.54 0.29 0.07 5.00 0.58 0.32 0.07 5.25 0.61 0.35 0.08 5.50 0.65 0.39 0.08 5.75 0.69 0.42 0.09 6.00 0.73 0.46 0.09 6.25 0.77 0.50 0.09 6.50 0.82 0.53 0.09 6.75 0.86 0.57 0.10 7.00 0.90 0.62 0.10 7.25 0.95 0.66 0.10 7.50 1.00 0.70 0.11 7.75 1.05 0.75 0.11 8.00 1.10 0.80 0.11 8.25 1.15 0.85 0.12 8.50 1.21 0.90 0.14 8.75 1.27 0.97 0.15 9.00 1.34 1.03 0.17 9.25 1.42 1.10 0.17 9.50 1.49 1.17 0.17 9.75 1.57 1.25 0.19 10.00 1.65 1.33 0.21 10.25 1.75 1.43 0.24 10.50 1.86 1.54 0.27 10.75 1.99 1.67 0.32 11.00 2.15 1.82 0.37 11.25 2.34 2.01 0.47 11.50 2.59 2.25 0.61 11.75 3.54 3.19 2.70 12.00 6.06 5.70 7.01 12.25 6.45 6.10 0.93 12.50 6.72 6.36 0.60 12.75 6.90 6.54 0.44 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 6.70 0.36 13.25 7.19 6.83 0.31 13.50 7.30 6.94 0.27 13.75 7.40 7.05 0.24 14.00 7.49 7.14 0.21 14.25 7.58 7.22 0.20 14.50 7.66 7.30 0.19 14.75 7.73 7.37 0.18 15.00 7.80 7.44 0.17 15.25 7.87 7.51 0.16 15.50 7.93 7.57 0.15 15.75 7.99 7.63 0.14 16.00 8.04 7.68 0.13 16.25 8.10 7.74 0.12 16.50 8.15 7.79 0.12 16.75 8.19 7.83 0.12 17.00 8.24 7.88 0.11 17.25 8.29 7.93 0.11 17.50 8.33 7.97 0.11 17.75 8.38 8.02 0.10 18.00 8.42 8.06 0.10 18.25 8.46 8.10 0.10 18.50 8.50 8.14 0.09 18.75 8.53 8.17 0.09 19.00 8.57 8.21 0.09 19.25 8.61 8.25 0.08 19.50 8.64 8.28 0.08 19.75 8.67 8.31 0.08 20.00 8.70 8.34 0.07 20.25 8.73 8.37 0.07 20.50 8.76 8.40 0.07 20.75 8.79 8.43 0.07 21.00 8.82 8.46 0.07 21.25 8.85 8.49 0.07 21.50 8.87 8.51 0.07 21.75 8.90 8.54 0.07 22.00 8.93 8.57 0.07 22.25 8.96 8.60 0.07 22.50 8.98 8.62 0.07 22.75 9.01 8.65 0.06 23.00 9.04 8.68 0.06 23.25 9.06 8.70 0.06 23.50 9.09 8.73 0.06 23.75 9.11 8.75 0.06 24.00 9.14 8.78 0.06 Printed 2/4/2020 6S 5S 2S 7S O O Post-1 to POA1 Post-2 to POA2 Post-3A o POA3 Post-3 to POA3 4P Pipe Storage 8L POA3 Subcat Reach Aon Llnk Post Prepared by Timmons Group Printed 2/4/2020 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.270 80 >75% Grass cover, Good, HSG D (2S, 5S, 6S, 7S) 1.240 98 Paved parking, HSG D (2S, 5S, 6S) iP"1111�1101CdWe1N=Fe1 Post Prepared by Timmons Group Printed 2/4/2020 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 1.510 HSG D 2S, 5S, 6S, 7S 0.000 Other 1.510 TOTAL AREA Post Prepared by Timmons Group Printed 2/4/2020 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.270 0.000 0.270 >75% Grass cover, Good 2S, 5S, 6S, 7S 0.000 0.000 0.000 1.240 0.000 1.240 Paved parking 2S, 5S, 6S 0.000 0.000 0.000 1.510 0.000 1.510 TOTAL AREA Post Prepared by Timmons Group Printed 2/4/2020 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 4P 574.50 573.75 75.0 0.0100 0.018 12.0 0.0 0.0 Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 s/n 06538 ©2017 HydroCAD Software Solutions LLC Page 6 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>2.59" Tc=6.0 min CN=96 Runoff=3.31 cfs 0.177 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>2.29" Tc=6.0 min CN=93 Runoff=0.71 cfs 0.036 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>2.29" Tc=6.0 min CN=93 Runoff=1.83 cfs 0.094 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>1.28" Tc=6.0 min CN=80 Runoff=0.02 cfs 0.001 of Pond 4P: Pipe Storage Peak Elev=575.88' Storage=1,898 cf Inflow=3.31 cfs 0.177 of Outflow=1.34 cfs 0.176 of Link 8L: POA3 Inflow=1.35 cfs 0.177 of Primary=1.35 cfs 0.177 of Total Runoff Area = 1.510 ac Runoff Volume = 0.308 of Average Runoff Depth = 2.45" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type/1 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Grow Printed 2/4/2020 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 3.31 cfs @ 11.96 hrs, Volume= 0.177 af, Depth> 2.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.750 98 Paved parking, HSG D 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I rI I I I 14 I 1 L i I I I S 2 LL � I I I I I I I I I I I I I I I I I I I I I I I 1 ■ Runoff I I I I I I I I I I I I I I I I I I I I I I ;Type 1111, 2-M� I I I I I I I I I I 11 YR Rainfall:;3.041' I I I I I I I I I Runbffl Abe&0.820 at: I I I I I I I I I �tunpfflll Vp10me=1--10.'� 77 elf ------------------ kunoff Depth>2.;69i' I I I I I I I I I I I Tc=6:10 fnih 1 1 1 I I I I I I I N=9 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 Time (hours) Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.01 3.75 0.14 0.01 0.01 4.00 0.15 0.01 0.01 4.25 0.16 0.01 0.01 4.50 0.17 0.01 0.01 4.75 0.18 0.02 0.01 5.00 0.19 0.02 0.01 5.25 0.20 0.03 0.02 5.50 0.22 0.03 0.02 5.75 0.23 0.04 0.02 6.00 0.24 0.04 0.02 6.25 0.26 0.05 0.02 6.50 0.27 0.06 0.02 6.75 0.29 0.07 0.03 7.00 0.30 0.07 0.03 7.25 0.32 0.08 0.03 7.50 0.33 0.09 0.03 7.75 0.35 0.10 0.03 8.00 0.36 0.11 0.03 8.25 0.38 0.13 0.04 8.50 0.40 0.14 0.04 8.75 0.42 0.15 0.05 9.00 0.45 0.17 0.06 9.25 0.47 0.19 0.06 9.50 0.50 0.20 0.06 9.75 0.52 0.22 0.07 10.00 0.55 0.25 0.07 10.25 0.58 0.27 0.09 10.50 0.62 0.30 0.10 10.75 0.66 0.34 0.12 11.00 0.71 0.38 0.14 11.25 0.78 0.43 0.19 11.50 0.86 0.51 0.24 11.75 1.18 0.79 1.12 12.00 2.02 1.59 3.07 12.25 2.15 1.72 0.41 12.50 2.23 1.80 0.26 12.75 2.30 1.86 0.19 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 1.91 0.16 13.25 2.39 1.95 0.14 13.50 2.43 1.99 0.12 13.75 2.46 2.02 0.11 14.00 2.49 2.05 0.10 14.25 2.52 2.08 0.09 14.50 2.55 2.11 0.08 14.75 2.57 2.13 0.08 15.00 2.59 2.15 0.08 15.25 2.62 2.18 0.07 15.50 2.64 2.20 0.07 15.75 2.66 2.22 0.06 16.00 2.68 2.23 0.06 16.25 2.69 2.25 0.06 16.50 2.71 2.27 0.05 16.75 2.73 2.28 0.05 17.00 2.74 2.30 0.05 17.25 2.76 2.31 0.05 17.50 2.77 2.33 0.05 17.75 2.79 2.34 0.05 18.00 2.80 2.36 0.05 18.25 2.81 2.37 0.04 18.50 2.83 2.38 0.04 18.75 2.84 2.39 0.04 19.00 2.85 2.41 0.04 19.25 2.86 2.42 0.04 19.50 2.87 2.43 0.04 19.75 2.88 2.44 0.03 20.00 2.89 2.45 0.03 20.25 2.90 2.46 0.03 20.50 2.91 2.47 0.03 20.75 2.92 2.48 0.03 21.00 2.93 2.49 0.03 21.25 2.94 2.50 0.03 21.50 2.95 2.50 0.03 21.75 2.96 2.51 0.03 22.00 2.97 2.52 0.03 22.25 2.98 2.53 0.03 22.50 2.99 2.54 0.03 22.75 3.00 2.55 0.03 23.00 3.01 2.56 0.03 23.25 3.01 2.57 0.03 23.50 3.02 2.57 0.03 23.75 3.03 2.58 0.03 24.00 3.04 2.59 0.03 Printed 2/4/2020 Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 0.71 cfs @ 11.96 hrs, Volume= 0.036 af, Depth> 2.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG D 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to POA2 Hydrograph I __y__y__T_ 0.75 --1--1--J--1--L--L----L-_I--1-I°- I 0.7 .I I I I I I I I I I I 0.65 I 0.6 I I I I I I I I I I I I I I I I I I I I I I 0.55 I 1 0.5 I I I I I I I I I I I in 0.45 �.. 0.4 6: 0.35 I 1 0.3 I I I I I I I I I I 0.25 I I I I I I I I I 1 0 2 0.15 I I I i I I I I 0 1I 1 I I I I I I I__J__J__1__ I I I I I I I I I I I I I I I I I I I I r r : YI uT24-b, 1 YR`Ra1nfaiH=;3.04"r- Run6ff Afe6=UJ9U alp - -R" nOff IlrVAP1gniO 0-03$-cjf tallOff IIIDepth>3 290 Tc=6.0 min C#+N=93— ��II I I I _ __l__T__r__r__r__I__7__T__r__r_ I I I I I I I I I I I I I I I I I I I I I I I I I I I I I'--r--I--I--I--T--T--I I I I I I I 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 Time (horns) ■ Runoff Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment SS: Post-2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.01 0.00 5.75 0.23 0.01 0.00 6.00 0.24 0.01 0.00 6.25 0.26 0.01 0.00 6.50 0.27 0.02 0.00 6.75 0.29 0.02 0.00 7.00 0.30 0.03 0.00 7.25 0.32 0.03 0.00 7.50 0.33 0.04 0.00 7.75 0.35 0.04 0.00 8.00 0.36 0.05 0.00 8.25 0.38 0.05 0.01 8.50 0.40 0.06 0.01 8.75 0.42 0.07 0.01 9.00 0.45 0.08 0.01 9.25 0.47 0.10 0.01 9.50 0.50 0.11 0.01 9.75 0.52 0.12 0.01 10.00 0.55 0.14 0.01 10.25 0.58 0.16 0.01 10.50 0.62 0.18 0.02 10.75 0.66 0.21 0.02 11.00 0.71 0.24 0.03 11.25 0.78 0.29 0.04 11.50 0.86 0.34 0.05 11.75 1.18 0.59 0.23 12.00 2.02 1.33 0.66 12.25 2.15 1.45 0.09 12.50 2.23 1.53 0.06 12.75 2.30 1.59 0.04 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 1.64 0.04 13.25 2.39 1.68 0.03 13.50 2.43 1.71 0.03 13.75 2.46 1.74 0.02 14.00 2.49 1.77 0.02 14.25 2.52 1.80 0.02 14.50 2.55 1.82 0.02 14.75 2.57 1.85 0.02 15.00 2.59 1.87 0.02 15.25 2.62 1.89 0.02 15.50 2.64 1.91 0.01 15.75 2.66 1.93 0.01 16.00 2.68 1.94 0.01 16.25 2.69 1.96 0.01 16.50 2.71 1.98 0.01 16.75 2.73 1.99 0.01 17.00 2.74 2.01 0.01 17.25 2.76 2.02 0.01 17.50 2.77 2.04 0.01 17.75 2.79 2.05 0.01 18.00 2.80 2.06 0.01 18.25 2.81 2.08 0.01 18.50 2.83 2.09 0.01 18.75 2.84 2.10 0.01 19.00 2.85 2.11 0.01 19.25 2.86 2.12 0.01 19.50 2.87 2.13 0.01 19.75 2.88 2.14 0.01 20.00 2.89 2.15 0.01 20.25 2.90 2.16 0.01 20.50 2.91 2.17 0.01 20.75 2.92 2.18 0.01 21.00 2.93 2.19 0.01 21.25 2.94 2.20 0.01 21.50 2.95 2.21 0.01 21.75 2.96 2.22 0.01 22.00 2.97 2.23 0.01 22.25 2.98 2.23 0.01 22.50 2.99 2.24 0.01 22.75 3.00 2.25 0.01 23.00 3.01 2.26 0.01 23.25 3.01 2.27 0.01 23.50 3.02 2.28 0.01 23.75 3.03 2.28 0.01 24.00 3.04 2.29 0.01 Printed 2/4/2020 Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 6S: Post-1 to POM Runoff = 1.83 cfs @ 11.96 hrs, Volume= 0.094 af, Depth> 2.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG D 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 6S: Post-1 to POM Hydrograph ❑ Runoff Type II 24-hr 1 YR Rainfall=3.04" Runoff Area=0.490 ac Runoff Volume=0.094 of 3 I IJ� Runoff Depth>2.29" LL f I Tc=6.0 min CN=93 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 Time (hours) Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 6S: Post-1 to POM Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.01 0.00 5.75 0.23 0.01 0.00 6.00 0.24 0.01 0.01 6.25 0.26 0.01 0.01 6.50 0.27 0.02 0.01 6.75 0.29 0.02 0.01 7.00 0.30 0.03 0.01 7.25 0.32 0.03 0.01 7.50 0.33 0.04 0.01 7.75 0.35 0.04 0.01 8.00 0.36 0.05 0.01 8.25 0.38 0.05 0.01 8.50 0.40 0.06 0.02 8.75 0.42 0.07 0.02 9.00 0.45 0.08 0.02 9.25 0.47 0.10 0.02 9.50 0.50 0.11 0.03 9.75 0.52 0.12 0.03 10.00 0.55 0.14 0.03 10.25 0.58 0.16 0.04 10.50 0.62 0.18 0.05 10.75 0.66 0.21 0.06 11.00 0.71 0.24 0.07 11.25 0.78 0.29 0.09 11.50 0.86 0.34 0.12 11.75 1.18 0.59 0.58 12.00 2.02 1.33 1.71 12.25 2.15 1.45 0.23 12.50 2.23 1.53 0.15 12.75 2.30 1.59 0.11 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 1.64 0.09 13.25 2.39 1.68 0.08 13.50 2.43 1.71 0.07 13.75 2.46 1.74 0.06 14.00 2.49 1.77 0.05 14.25 2.52 1.80 0.05 14.50 2.55 1.82 0.05 14.75 2.57 1.85 0.05 15.00 2.59 1.87 0.04 15.25 2.62 1.89 0.04 15.50 2.64 1.91 0.04 15.75 2.66 1.93 0.04 16.00 2.68 1.94 0.03 16.25 2.69 1.96 0.03 16.50 2.71 1.98 0.03 16.75 2.73 1.99 0.03 17.00 2.74 2.01 0.03 17.25 2.76 2.02 0.03 17.50 2.77 2.04 0.03 17.75 2.79 2.05 0.03 18.00 2.80 2.06 0.03 18.25 2.81 2.08 0.03 18.50 2.83 2.09 0.02 18.75 2.84 2.10 0.02 19.00 2.85 2.11 0.02 19.25 2.86 2.12 0.02 19.50 2.87 2.13 0.02 19.75 2.88 2.14 0.02 20.00 2.89 2.15 0.02 20.25 2.90 2.16 0.02 20.50 2.91 2.17 0.02 20.75 2.92 2.18 0.02 21.00 2.93 2.19 0.02 21.25 2.94 2.20 0.02 21.50 2.95 2.21 0.02 21.75 2.96 2.22 0.02 22.00 2.97 2.23 0.02 22.25 2.98 2.23 0.02 22.50 2.99 2.24 0.02 22.75 3.00 2.25 0.02 23.00 3.01 2.26 0.02 23.25 3.01 2.27 0.02 23.50 3.02 2.28 0.02 23.75 3.03 2.28 0.02 24.00 3.04 2.29 0.02 Printed 2/4/2020 Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.02 cfs @ 11.98 hrs, Volume= 0.001 af, Depth> 1.28" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=3.04" Area (ac) CN Description 0.010 80 >75% Grass cover, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: Post-3B to POA3 Hydrograph ---------------------------- 0.023 -----' ---------' - --'- 0.022 0.021 0.02 -------'--}--------'--`--�--- 0.01 s I I I I I I I I 0.017 --I--,--,--r--r--I--,--r--r 0.016 ---J--1--i--`---J--i--L- I I I I I I I I I w 0.014 . ----------1--L--- 3 0.012 - _ r 0.011 0.01 --r-----T--Ii -------'r--r 0.008 --I--,--�--r--r--I--,--r--r--� 0.007 - '--J--1--L--L- '--L--1--L--'- 0.006 --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 Time (hours) Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Subcatchment 7S: Post-3B to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.25 0.04 0.00 0.00 1.50 0.05 0.00 0.00 1.75 0.06 0.00 0.00 2.00 0.07 0.00 0.00 2.25 0.08 0.00 0.00 2.50 0.09 0.00 0.00 2.75 0.10 0.00 0.00 3.00 0.10 0.00 0.00 3.25 0.11 0.00 0.00 3.50 0.13 0.00 0.00 3.75 0.14 0.00 0.00 4.00 0.15 0.00 0.00 4.25 0.16 0.00 0.00 4.50 0.17 0.00 0.00 4.75 0.18 0.00 0.00 5.00 0.19 0.00 0.00 5.25 0.20 0.00 0.00 5.50 0.22 0.00 0.00 5.75 0.23 0.00 0.00 6.00 0.24 0.00 0.00 6.25 0.26 0.00 0.00 6.50 0.27 0.00 0.00 6.75 0.29 0.00 0.00 7.00 0.30 0.00 0.00 7.25 0.32 0.00 0.00 7.50 0.33 0.00 0.00 7.75 0.35 0.00 0.00 8.00 0.36 0.00 0.00 8.25 0.38 0.00 0.00 8.50 0.40 0.00 0.00 8.75 0.42 0.00 0.00 9.00 0.45 0.00 0.00 9.25 0.47 0.00 0.00 9.50 0.50 0.00 0.00 9.75 0.52 0.00 0.00 10.00 0.55 0.00 0.00 10.25 0.58 0.00 0.00 10.50 0.62 0.01 0.00 10.75 0.66 0.01 0.00 11.00 0.71 0.02 0.00 11.25 0.78 0.03 0.00 11.50 0.86 0.05 0.00 11.75 1.18 0.14 0.00 12.00 2.02 0.57 0.02 12.25 2.15 0.65 0.00 12.50 2.23 0.71 0.00 12.75 2.30 0.75 0.00 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.35 0.78 0.00 13.25 2.39 0.81 0.00 13.50 2.43 0.84 0.00 13.75 2.46 0.86 0.00 14.00 2.49 0.88 0.00 14.25 2.52 0.90 0.00 14.50 2.55 0.92 0.00 14.75 2.57 0.94 0.00 15.00 2.59 0.95 0.00 15.25 2.62 0.97 0.00 15.50 2.64 0.99 0.00 15.75 2.66 1.00 0.00 16.00 2.68 1.01 0.00 16.25 2.69 1.02 0.00 16.50 2.71 1.04 0.00 16.75 2.73 1.05 0.00 17.00 2.74 1.06 0.00 17.25 2.76 1.07 0.00 17.50 2.77 1.08 0.00 17.75 2.79 1.09 0.00 18.00 2.80 1.10 0.00 18.25 2.81 1.11 0.00 18.50 2.83 1.12 0.00 18.75 2.84 1.13 0.00 19.00 2.85 1.14 0.00 19.25 2.86 1.15 0.00 19.50 2.87 1.16 0.00 19.75 2.88 1.16 0.00 20.00 2.89 1.17 0.00 20.25 2.90 1.18 0.00 20.50 2.91 1.19 0.00 20.75 2.92 1.19 0.00 21.00 2.93 1.20 0.00 21.25 2.94 1.21 0.00 21.50 2.95 1.21 0.00 21.75 2.96 1.22 0.00 22.00 2.97 1.23 0.00 22.25 2.98 1.23 0.00 22.50 2.99 1.24 0.00 22.75 3.00 1.25 0.00 23.00 3.01 1.25 0.00 23.25 3.01 1.26 0.00 23.50 3.02 1.27 0.00 23.75 3.03 1.27 0.00 24.00 3.04 1.28 0.00 Printed 2/4/2020 Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Summary for Pond 4P: Pipe Storage Printed 2/4/2020 Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 2.59" for 1 YR event Inflow = 3.31 cfs @ 11.96 hrs, Volume= 0.177 of Outflow = 1.34 cfs @ 12.08 hrs, Volume= 0.176 af, Atten= 59%, Lag= 7.2 min Primary = 1.34 cfs @ 12.08 hrs, Volume= 0.176 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 575.88' @ 12.08 hrs Surf.Area= 1,794 sf Storage= 1,898 cf Plug -Flow detention time=18.9 min calculated for 0.176 of (99% of inflow) Center -of -Mass det. time= 15.4 min ( 786.9 - 771.5 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 574.50' / 573.75' S= 0.0100 '/' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=1.34 cfs @ 12.08 hrs HW=575.87' (Free Discharge) t1=Culvert (Passes 1.34 cfs of 2.63 cfs potential flow) �2=Orifice/Grate (Orifice Controls 1.34 cfs @ 5.00 fps) 3=S harp-C rested Rectangular Weir( Controls 0.00 cfs) Post I Timmons Pond 412: Pipe Storage Hydrograph 4 5 6 7 8 9 10 11 12 13 Time (hours) Type // 24-hr 1 YR Rainfall=3.04" Printed 2/4/2020 POAk F-10=¢75.08,1 Storage=1',888, cf Pond 413: Pipe Storage Stage -Discharge Discharge Ids) ■ Inflow ■ Pdmary ■ Pdmary Post Type // 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Grow Printed 2/4/2020 Pond 412: Pipe Storage Stage -Area -Storage ■ Srorage Storage (cubic -feet) Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0.00 0 574.50 0.00 1.50 0.00 0 574.50 0.00 2.00 0.00 0 574.50 0.00 2.50 0.00 0 574.50 0.00 3.00 0.00 2 574.51 0.00 3.50 0.01 7 574.53 0.00 4.00 0.01 12 574.54 0.01 4.50 0.01 17 574.55 0.01 5.00 0.01 23 574.56 0.01 5.50 0.02 27 574.57 0.02 6.00 0.02 31 574.58 0.02 6.50 0.02 36 574.59 0.02 7.00 0.03 40 574.59 0.03 7.50 0.03 43 574.60 0.03 8.00 0.03 47 574.61 0.03 8.50 0.04 53 574.61 0.04 9.00 0.06 63 574.63 0.05 9.50 0.06 70 574.64 0.06 10.00 0.07 79 574.65 0.07 10.50 0.10 96 574.67 0.09 11.00 0.14 123 574.70 0.13 11.50 0.24 179 574.76 0.20 12.00 3.07 1,659 575.74 1.25 12.50 0.26 871 575.28 0.90 13.00 0.16 234 574.81 0.28 13.50 0.12 138 574.72 0.15 14.00 0.10 110 574.69 0.11 14.50 0.08 96 574.67 0.09 15.00 0.08 89 574.66 0.08 15.50 0.07 82 574.65 0.07 16.00 0.06 75 574.64 0.06 16.50 0.05 69 574.64 0.06 17.00 0.05 66 574.63 0.05 17.50 0.05 63 574.63 0.05 18.00 0.05 60 574.62 0.05 18.50 0.04 58 574.62 0.04 19.00 0.04 55 574.62 0.04 19.50 0.04 52 574.61 0.04 20.00 0.03 49 574.61 0.03 20.50 0.03 46 574.60 0.03 21.00 0.03 45 574.60 0.03 21.50 0.03 45 574.60 0.03 22.00 0.03 44 574.60 0.03 22.50 0.03 44 574.60 0.03 23.00 0.03 43 574.60 0.03 23.50 0.03 42 574.60 0.03 24.00 0.03 42 574.60 0.03 Post Timmons Elevation Primary (feet) (cfs) 574.50 0.00 574.52 0.00 574.54 0.00 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Type 11 24-hr 1 YR Rainfall=3.04" Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) (cfs) 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.96 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576.06 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576.40 3.20 576.42 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Printed 2/4/2020 Post Timmons Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Type 11 24-hr 1 YR Rainfall=3.04" Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Printed 2/4/2020 Post Type 11 24-hr 1 YR Rainfall=3.04" Prepared by Timmons Group Printed 2/4/2020 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 2.56" for 1 YR event Inflow = 1.35 cfs @ 12.07 hrs, Volume= 0.177 of Primary = 1.35 cfs @ 12.07 hrs, Volume= 0.177 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ❑ Inflow ❑ Primary Time (hours) Post Timmons Type 11 24-hr 1 YR Rainfall=3.04" Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.75 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.25 0.00 0.00 0.00 2.50 0.00 0.00 0.00 2.75 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.25 0.00 0.00 0.00 3.50 0.00 0.00 0.00 3.75 0.00 0.00 0.00 4.00 0.01 0.00 0.01 4.25 0.01 0.00 0.01 4.50 0.01 0.00 0.01 4.75 0.01 0.00 0.01 5.00 0.01 0.00 0.01 5.25 0.01 0.00 0.01 5.50 0.02 0.00 0.02 5.75 0.02 0.00 0.02 6.00 0.02 0.00 0.02 6.25 0.02 0.00 0.02 6.50 0.02 0.00 0.02 6.75 0.02 0.00 0.02 7.00 0.03 0.00 0.03 7.25 0.03 0.00 0.03 7.50 0.03 0.00 0.03 7.75 0.03 0.00 0.03 8.00 0.03 0.00 0.03 8.25 0.04 0.00 0.04 8.50 0.04 0.00 0.04 8.75 0.04 0.00 0.04 9.00 0.05 0.00 0.05 9.25 0.05 0.00 0.05 9.50 0.06 0.00 0.06 9.75 0.06 0.00 0.06 10.00 0.07 0.00 0.07 10.25 0.08 0.00 0.08 10.50 0.09 0.00 0.09 10.75 0.10 0.00 0.10 11.00 0.13 0.00 0.13 11.25 0.15 0.00 0.15 11.50 0.20 0.00 0.20 11.75 0.52 0.00 0.52 12.00 1.28 0.00 1.28 12.25 1.20 0.00 1.20 12.50 0.90 0.00 0.90 12.75 0.53 0.00 0.53 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.28 0.00 0.28 13.25 0.18 0.00 0.18 13.50 0.15 0.00 0.15 13.75 0.12 0.00 0.12 14.00 0.11 0.00 0.11 14.25 0.10 0.00 0.10 14.50 0.09 0.00 0.09 14.75 0.08 0.00 0.08 15.00 0.08 0.00 0.08 15.25 0.08 0.00 0.08 15.50 0.07 0.00 0.07 15.75 0.07 0.00 0.07 16.00 0.06 0.00 0.06 16.25 0.06 0.00 0.06 16.50 0.06 0.00 0.06 16.75 0.05 0.00 0.05 17.00 0.05 0.00 0.05 17.25 0.05 0.00 0.05 17.50 0.05 0.00 0.05 17.75 0.05 0.00 0.05 18.00 0.05 0.00 0.05 18.25 0.05 0.00 0.05 18.50 0.04 0.00 0.04 18.75 0.04 0.00 0.04 19.00 0.04 0.00 0.04 19.25 0.04 0.00 0.04 19.50 0.04 0.00 0.04 19.75 0.04 0.00 0.04 20.00 0.03 0.00 0.03 20.25 0.03 0.00 0.03 20.50 0.03 0.00 0.03 20.75 0.03 0.00 0.03 21.00 0.03 0.00 0.03 21.25 0.03 0.00 0.03 21.50 0.03 0.00 0.03 21.75 0.03 0.00 0.03 22.00 0.03 0.00 0.03 22.25 0.03 0.00 0.03 22.50 0.03 0.00 0.03 22.75 0.03 0.00 0.03 23.00 0.03 0.00 0.03 23.25 0.03 0.00 0.03 23.50 0.03 0.00 0.03 23.75 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Printed 2/4/2020 Post Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 s/n 06538 ©2017 HydroCAD Software Solutions LLC Page 23 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>3.22" Tc=6.0 min CN=96 Runoff=4.06 cfs 0.220 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth >2.91" Tc=6.0 min CN=93 Runoff=0.89 cfs 0.046 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth >2.91" Tc=6.0 min CN=93 Runoff=2.29 cfs 0.119 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>1.78" Tc=6.0 min CN=80 Runoff=0.03 cfs 0.001 of Pond 4P: Pipe Storage Peak Elev=576.10' Storage=2,294 cf Inflow=4.06 cfs 0.220 of Outflow=2.31 cfs 0.219 of Link 8L: POA3 Inflow=2.32 cfs 0.220 of Primary=2.32 cfs 0.220 of Total Runoff Area = 1.510 ac Runoff Volume = 0.386 of Average Runoff Depth = 3.07" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Grow Printed 2/4/2020 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 4.06 cfs @ 11.96 hrs, Volume= 0.220 af, Depth> 3.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.750 98 Paved parking, HSG D 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 i i I I I I i i I I I I i i I I I i i I I I I ■ RunoR 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 Time (hours) Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.01 3.25 0.14 0.01 0.01 3.50 0.15 0.01 0.01 3.75 0.16 0.01 0.01 4.00 0.18 0.02 0.01 4.25 0.19 0.02 0.02 4.50 0.20 0.03 0.02 4.75 0.22 0.03 0.02 5.00 0.23 0.04 0.02 5.25 0.25 0.05 0.02 5.50 0.26 0.05 0.03 5.75 0.28 0.06 0.03 6.00 0.29 0.07 0.03 6.25 0.31 0.08 0.03 6.50 0.33 0.09 0.03 6.75 0.35 0.10 0.04 7.00 0.36 0.11 0.04 7.25 0.38 0.13 0.04 7.50 0.40 0.14 0.04 7.75 0.42 0.15 0.04 8.00 0.44 0.17 0.05 8.25 0.46 0.18 0.05 8.50 0.49 0.20 0.06 8.75 0.51 0.22 0.07 9.00 0.54 0.24 0.07 9.25 0.57 0.26 0.08 9.50 0.60 0.29 0.08 9.75 0.63 0.31 0.08 10.00 0.67 0.34 0.10 10.25 0.71 0.37 0.11 10.50 0.75 0.41 0.13 10.75 0.80 0.46 0.15 11.00 0.86 0.51 0.18 11.25 0.94 0.58 0.24 11.50 1.04 0.67 0.31 11.75 1.42 1.02 1.39 12.00 2.44 2.00 3.76 12.25 2.60 2.16 0.50 12.50 2.70 2.26 0.32 12.75 2.78 2.33 0.24 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 2.40 0.20 13.25 2.89 2.45 0.17 13.50 2.94 2.49 0.15 13.75 2.98 2.53 0.13 14.00 3.02 2.57 0.12 14.25 3.05 2.60 0.11 14.50 3.08 2.63 0.10 14.75 3.11 2.66 0.10 15.00 3.14 2.69 0.09 15.25 3.17 2.72 0.09 15.50 3.19 2.74 0.08 15.75 3.22 2.77 0.08 16.00 3.24 2.79 0.07 16.25 3.26 2.81 0.07 16.50 3.28 2.83 0.07 16.75 3.30 2.85 0.06 17.00 3.32 2.87 0.06 17.25 3.34 2.88 0.06 17.50 3.36 2.90 0.06 17.75 3.37 2.92 0.06 18.00 3.39 2.94 0.05 18.25 3.41 2.95 0.05 18.50 3.42 2.97 0.05 18.75 3.44 2.98 0.05 19.00 3.45 3.00 0.05 19.25 3.46 3.01 0.05 19.50 3.48 3.02 0.04 19.75 3.49 3.04 0.04 20.00 3.50 3.05 0.04 20.25 3.52 3.06 0.04 20.50 3.53 3.07 0.04 20.75 3.54 3.08 0.04 21.00 3.55 3.09 0.04 21.25 3.56 3.11 0.04 21.50 3.57 3.12 0.04 21.75 3.58 3.13 0.04 22.00 3.60 3.14 0.04 22.25 3.61 3.15 0.04 22.50 3.62 3.16 0.04 22.75 3.63 3.17 0.04 23.00 3.64 3.18 0.03 23.25 3.65 3.19 0.03 23.50 3.66 3.20 0.03 23.75 3.67 3.21 0.03 24.00 3.68 3.22 0.03 Printed 2/4/2020 Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 0.89 cfs @ 11.96 hrs, Volume= 0.046 af, Depth> 2.91" Printed 2/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG D 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to POA2 0.95 ----------r----------- - --------r-----------r--i --�-- 0.9 --'-- 1--J--1--L--L--'--J--�--1-- --1--J--1--1--L--r�%!�n-p�-�t1 -p'-- ypeJ!i 0.85 ------J--i--`--'�----J-- --i--'� ----J--i--i--'�--'�2 0.8 J------- 2 YR-Rainf 1[=;3.6$N- AIIII 0170a i,- 0.7 ------J--i--`--�`----J--'--i--� ----ftn W1 1 0.55 ------ka I I I - 0.5 045 "i '''+_ ''_ �ClTV.V .b.'i. IL 0.3 --r--i--r--�--r--r--ire--1- i i i --�--r-r-r--r-r--i--4--r--r--r_ 0.25 --r----r----r--r--r-r-- r -T- i ------r--r--r------r--r--r- 02 � --r----r--7--r--r--r-r----1---T--7--r--r--r------r--r--r- 1 1 0.15 i 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 Time (horns) ■ Runoff Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 5S: Post-2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.01 0.00 5.00 0.23 0.01 0.00 5.25 0.25 0.01 0.00 5.50 0.26 0.01 0.00 5.75 0.28 0.02 0.00 6.00 0.29 0.02 0.00 6.25 0.31 0.03 0.00 6.50 0.33 0.03 0.00 6.75 0.35 0.04 0.00 7.00 0.36 0.05 0.01 7.25 0.38 0.05 0.01 7.50 0.40 0.06 0.01 7.75 0.42 0.07 0.01 8.00 0.44 0.08 0.01 8.25 0.46 0.09 0.01 8.50 0.49 0.10 0.01 8.75 0.51 0.12 0.01 9.00 0.54 0.13 0.01 9.25 0.57 0.15 0.01 9.50 0.60 0.17 0.01 9.75 0.63 0.19 0.02 10.00 0.67 0.21 0.02 10.25 0.71 0.24 0.02 10.50 0.75 0.27 0.02 10.75 0.80 0.30 0.03 11.00 0.86 0.35 0.04 11.25 0.94 0.41 0.05 11.50 1.04 0.48 0.06 11.75 1.42 0.80 0.29 12.00 2.44 1.72 0.83 12.25 2.60 1.87 0.11 12.50 2.70 1.97 0.07 12.75 2.78 2.04 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 2.10 0.04 13.25 2.89 2.15 0.04 13.50 2.94 2.20 0.03 13.75 2.98 2.24 0.03 14.00 3.02 2.27 0.03 14.25 3.05 2.30 0.02 14.50 3.08 2.33 0.02 14.75 3.11 2.36 0.02 15.00 3.14 2.39 0.02 15.25 3.17 2.41 0.02 15.50 3.19 2.44 0.02 15.75 3.22 2.46 0.02 16.00 3.24 2.48 0.02 16.25 3.26 2.50 0.02 16.50 3.28 2.52 0.01 16.75 3.30 2.54 0.01 17.00 3.32 2.56 0.01 17.25 3.34 2.58 0.01 17.50 3.36 2.59 0.01 17.75 3.37 2.61 0.01 18.00 3.39 2.63 0.01 18.25 3.41 2.64 0.01 18.50 3.42 2.66 0.01 18.75 3.44 2.67 0.01 19.00 3.45 2.69 0.01 19.25 3.46 2.70 0.01 19.50 3.48 2.71 0.01 19.75 3.49 2.73 0.01 20.00 3.50 2.74 0.01 20.25 3.52 2.75 0.01 20.50 3.53 2.76 0.01 20.75 3.54 2.77 0.01 21.00 3.55 2.78 0.01 21.25 3.56 2.79 0.01 21.50 3.57 2.81 0.01 21.75 3.58 2.82 0.01 22.00 3.60 2.83 0.01 22.25 3.61 2.84 0.01 22.50 3.62 2.85 0.01 22.75 3.63 2.86 0.01 23.00 3.64 2.87 0.01 23.25 3.65 2.88 0.01 23.50 3.66 2.89 0.01 23.75 3.67 2.90 0.01 24.00 3.68 2.91 0.01 Printed 2/4/2020 Post Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 6S: Post-1 to POA1 Runoff = 2.29 cfs @ 11.96 hrs, Volume= 0.119 af, Depth> 2.91" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG D 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 6S: Post-1 to POA1 I I I I I I I I I I I I i I I I I I I I I I I ■ RunoH 2 29 C(8 I I I I I I I I I I :Type II', 24-h�r ---L_ I I J 1 L L 2 �12 YR RainfaIN3.98"'I I I I I I I I I Runbff Abe&0.49O at: I I I I I I I I I ROnpff'I V910me=10.11$ elf kunoffbip6>2.91" 3 I I I I I I I I I I I LL = = c-6I I I Q1�_ I I I I I I 1 I I I I CAN=93 I I I 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 Time (hours) Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 6S: Post-1 to POM Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.01 0.00 5.00 0.23 0.01 0.01 5.25 0.25 0.01 0.01 5.50 0.26 0.01 0.01 5.75 0.28 0.02 0.01 6.00 0.29 0.02 0.01 6.25 0.31 0.03 0.01 6.50 0.33 0.03 0.01 6.75 0.35 0.04 0.01 7.00 0.36 0.05 0.01 7.25 0.38 0.05 0.02 7.50 0.40 0.06 0.02 7.75 0.42 0.07 0.02 8.00 0.44 0.08 0.02 8.25 0.46 0.09 0.02 8.50 0.49 0.10 0.02 8.75 0.51 0.12 0.03 9.00 0.54 0.13 0.03 9.25 0.57 0.15 0.03 9.50 0.60 0.17 0.03 9.75 0.63 0.19 0.04 10.00 0.67 0.21 0.04 10.25 0.71 0.24 0.05 10.50 0.75 0.27 0.06 10.75 0.80 0.30 0.07 11.00 0.86 0.35 0.09 11.25 0.94 0.41 0.12 11.50 1.04 0.48 0.16 11.75 1.42 0.80 0.75 12.00 2.44 1.72 2.13 12.25 2.60 1.87 0.29 12.50 2.70 1.97 0.19 12.75 2.78 2.04 0.14 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 2.10 0.11 13.25 2.89 2.15 0.10 13.50 2.94 2.20 0.09 13.75 2.98 2.24 0.08 14.00 3.02 2.27 0.07 14.25 3.05 2.30 0.06 14.50 3.08 2.33 0.06 14.75 3.11 2.36 0.06 15.00 3.14 2.39 0.05 15.25 3.17 2.41 0.05 15.50 3.19 2.44 0.05 15.75 3.22 2.46 0.04 16.00 3.24 2.48 0.04 16.25 3.26 2.50 0.04 16.50 3.28 2.52 0.04 16.75 3.30 2.54 0.04 17.00 3.32 2.56 0.04 17.25 3.34 2.58 0.04 17.50 3.36 2.59 0.03 17.75 3.37 2.61 0.03 18.00 3.39 2.63 0.03 18.25 3.41 2.64 0.03 18.50 3.42 2.66 0.03 18.75 3.44 2.67 0.03 19.00 3.45 2.69 0.03 19.25 3.46 2.70 0.03 19.50 3.48 2.71 0.03 19.75 3.49 2.73 0.02 20.00 3.50 2.74 0.02 20.25 3.52 2.75 0.02 20.50 3.53 2.76 0.02 20.75 3.54 2.77 0.02 21.00 3.55 2.78 0.02 21.25 3.56 2.79 0.02 21.50 3.57 2.81 0.02 21.75 3.58 2.82 0.02 22.00 3.60 2.83 0.02 22.25 3.61 2.84 0.02 22.50 3.62 2.85 0.02 22.75 3.63 2.86 0.02 23.00 3.64 2.87 0.02 23.25 3.65 2.88 0.02 23.50 3.66 2.89 0.02 23.75 3.67 2.90 0.02 24.00 3.68 2.91 0.02 Printed 2/4/2020 Post Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.03 cfs @ 11.97 hrs, Volume= 0.001 af, Depth> 1.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 0.010 80 >75% Grass cover, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: Post-3B to POA3 Hydrograph 0.034 ---------_------ 0.032 0.03 1 1 I I I 1 I I I 1 0.028 0.026 0.024 1_ 1 � � � I 1 ' ' ' _1__7__r__r__I__,__ 7__ r__r. - 0.022 0.0 2 N a 0 9.91 s " 0.012 1 1 0.01 1 1 1 1 --1---1--T--T--r--1--T--T--r--i O.00a 1 1 I I I 1 I I I 1 0.006 0.004 Type II 24-hr 2 Y-R Ralnfallr3.68" - Runoff Ate9=0.010 ai _ Runoff VQI0MP=0.001 of Runoff Depthy 1 -- 1.78'' r - - - -- - --- -; T-Tc=G.-0 rlh 1 1 CN=80 I III 11 1 1 1 r— r--r--r-,--T--r--r-T - -T- -T 1 I y I I 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 Time (hours) ❑ Runoff Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Subcatchment 7S: Post-3B to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.00 9.75 0.63 0.01 0.00 10.00 0.67 0.01 0.00 10.25 0.71 0.02 0.00 10.50 0.75 0.02 0.00 10.75 0.80 0.03 0.00 11.00 0.86 0.05 0.00 11.25 0.94 0.07 0.00 11.50 1.04 0.10 0.00 11.75 1.42 0.25 0.01 12.00 2.44 0.85 0.03 12.25 2.60 0.96 0.00 12.50 2.70 1.03 0.00 12.75 2.78 1.09 0.00 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 2.84 1.13 0.00 13.25 2.89 1.17 0.00 13.50 2.94 1.21 0.00 13.75 2.98 1.24 0.00 14.00 3.02 1.26 0.00 14.25 3.05 1.29 0.00 14.50 3.08 1.31 0.00 14.75 3.11 1.33 0.00 15.00 3.14 1.36 0.00 15.25 3.17 1.38 0.00 15.50 3.19 1.40 0.00 15.75 3.22 1.41 0.00 16.00 3.24 1.43 0.00 16.25 3.26 1.45 0.00 16.50 3.28 1.46 0.00 16.75 3.30 1.48 0.00 17.00 3.32 1.49 0.00 17.25 3.34 1.51 0.00 17.50 3.36 1.52 0.00 17.75 3.37 1.54 0.00 18.00 3.39 1.55 0.00 18.25 3.41 1.56 0.00 18.50 3.42 1.57 0.00 18.75 3.44 1.59 0.00 19.00 3.45 1.60 0.00 19.25 3.46 1.61 0.00 19.50 3.48 1.62 0.00 19.75 3.49 1.63 0.00 20.00 3.50 1.64 0.00 20.25 3.52 1.65 0.00 20.50 3.53 1.66 0.00 20.75 3.54 1.67 0.00 21.00 3.55 1.68 0.00 21.25 3.56 1.69 0.00 21.50 3.57 1.69 0.00 21.75 3.58 1.70 0.00 22.00 3.60 1.71 0.00 22.25 3.61 1.72 0.00 22.50 3.62 1.73 0.00 22.75 3.63 1.74 0.00 23.00 3.64 1.75 0.00 23.25 3.65 1.76 0.00 23.50 3.66 1.76 0.00 23.75 3.67 1.77 0.00 24.00 3.68 1.78 0.00 Printed 2/4/2020 Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Summary for Pond 4P: Pipe Storage Printed 2/4/2020 Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 3.22" for 2 YR event Inflow = 4.06 cfs @ 11.96 hrs, Volume= 0.220 of Outflow = 2.31 cfs @ 12.06 hrs, Volume= 0.219 af, Atten= 43%, Lag= 5.9 min Primary = 2.31 cfs @ 12.06 hrs, Volume= 0.219 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 576.10' @ 12.06 hrs Surf.Area= 1,796 sf Storage= 2,294 cf Plug -Flow detention time=18.5 min calculated for 0.219 of (99% of inflow) Center -of -Mass det. time= 15.2 min ( 781.2 - 766.0 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 574.50' / 573.75' S= 0.0100 '/' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=2.23 cfs @ 12.06 hrs HW=576.08' (Free Discharge) t1=Culvert (Passes 2.23 cfs of 2.87 cfs potential flow) �2=Orifice/Grate (Orifice Controls 1.46 cfs @ 5.47 fps) 3=S harp-C rested Rectangular Weir(Weir Controls 0.77 cfs @ 1.40 fps) Post I Timmons Pond 412: Pipe Storage Hydrograph 4 5 6 7 8 9 10 11 12 13 Time (hours) Type // 24-hr 2 YR Rainfall=3.68" Printed 2/4/2020 I I I I I I I I I I I I I I I',nflow',Are64.,,820 lac POAk F-IeV=¢7j6.'10' Storage=2L 941 cf - I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I __________ _-I- _______ __ __ ____ I I I I I I I I I I I I I I I I I I Pond 413: Pipe Storage Stage -Discharge Discharge Ids) ■ Inflow ■ Pdmary ■ Pdmary Post Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Grow Printed 2/4/2020 Pond 412: Pipe Storage Stage -Area -Storage ■ Srorage Storage (cubic -feet) Post Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0.00 0 574.50 0.00 1.50 0.00 0 574.50 0.00 2.00 0.00 0 574.50 0.00 2.50 0.00 2 574.51 0.00 3.00 0.01 7 574.53 0.00 3.50 0.01 14 574.55 0.01 4.00 0.01 21 574.56 0.01 4.50 0.02 26 574.57 0.01 5.00 0.02 31 574.58 0.02 5.50 0.03 36 574.59 0.02 6.00 0.03 41 574.60 0.03 6.50 0.03 46 574.60 0.03 7.00 0.04 50 574.61 0.04 7.50 0.04 54 574.62 0.04 8.00 0.05 59 574.62 0.04 8.50 0.06 66 574.63 0.05 9.00 0.07 77 574.65 0.07 9.50 0.08 85 574.66 0.08 10.00 0.10 95 574.67 0.09 10.50 0.13 116 574.69 0.11 11.00 0.18 149 574.73 0.16 11.50 0.31 217 574.80 0.25 12.00 3.76 2,093 575.98 1.65 12.50 0.32 1,098 575.42 1.02 13.00 0.20 299 574.87 0.37 13.50 0.15 163 574.74 0.18 14.00 0.12 127 574.71 0.13 14.50 0.10 ill 574.69 0.11 15.00 0.09 102 574.68 0.10 15.50 0.08 94 574.67 0.09 16.00 0.07 86 574.66 0.08 16.50 0.07 80 574.65 0.07 17.00 0.06 76 574.65 0.06 17.50 0.06 73 574.64 0.06 18.00 0.05 69 574.64 0.06 18.50 0.05 66 574.63 0.05 19.00 0.05 63 574.63 0.05 19.50 0.04 59 574.62 0.05 20.00 0.04 56 574.62 0.04 20.50 0.04 54 574.61 0.04 21.00 0.04 52 574.61 0.04 21.50 0.04 52 574.61 0.04 22.00 0.04 51 574.61 0.04 22.50 0.04 50 574.61 0.04 23.00 0.03 49 574.61 0.04 23.50 0.03 49 574.61 0.03 24.00 0.03 48 574.61 0.03 Post Timmons Elevation Primary (feet) (cfs) 574.50 0.00 574.52 0.00 574.54 0.00 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Type 11 24-hr 2 YR Rainfall=3.68" Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) (cfs) 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.96 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576.06 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576.40 3.20 576.42 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Printed 2/4/2020 Post Timmons Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Type 11 24-hr 2 YR Rainfall=3.68" Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Printed 2/4/2020 Post Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 2/4/2020 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 3.19" for 2 YR event Inflow = 2.32 cfs @ 12.06 hrs, Volume= 0.220 of Primary = 2.32 cfs @ 12.06 hrs, Volume= 0.220 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ❑ Inflow ❑ Primary Time (hours) Post Timmons Type 11 24-hr 2 YR Rainfall=3.68" Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.75 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.25 0.00 0.00 0.00 2.50 0.00 0.00 0.00 2.75 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.25 0.00 0.00 0.00 3.50 0.01 0.00 0.01 3.75 0.01 0.00 0.01 4.00 0.01 0.00 0.01 4.25 0.01 0.00 0.01 4.50 0.01 0.00 0.01 4.75 0.02 0.00 0.02 5.00 0.02 0.00 0.02 5.25 0.02 0.00 0.02 5.50 0.02 0.00 0.02 5.75 0.03 0.00 0.03 6.00 0.03 0.00 0.03 6.25 0.03 0.00 0.03 6.50 0.03 0.00 0.03 6.75 0.03 0.00 0.03 7.00 0.04 0.00 0.04 7.25 0.04 0.00 0.04 7.50 0.04 0.00 0.04 7.75 0.04 0.00 0.04 8.00 0.04 0.00 0.04 8.25 0.05 0.00 0.05 8.50 0.05 0.00 0.05 8.75 0.06 0.00 0.06 9.00 0.07 0.00 0.07 9.25 0.07 0.00 0.07 9.50 0.08 0.00 0.08 9.75 0.08 0.00 0.08 10.00 0.09 0.00 0.09 10.25 0.10 0.00 0.10 10.50 0.12 0.00 0.12 10.75 0.13 0.00 0.13 11.00 0.16 0.00 0.16 11.25 0.20 0.00 0.20 11.50 0.25 0.00 0.25 11.75 0.64 0.00 0.64 12.00 1.68 0.00 1.68 12.25 1.30 0.00 1.30 12.50 1.02 0.00 1.02 12.75 0.69 0.00 0.69 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.37 0.00 0.37 13.25 0.23 0.00 0.23 13.50 0.18 0.00 0.18 13.75 0.15 0.00 0.15 14.00 0.13 0.00 0.13 14.25 0.12 0.00 0.12 14.50 0.11 0.00 0.11 14.75 0.10 0.00 0.10 15.00 0.10 0.00 0.10 15.25 0.09 0.00 0.09 15.50 0.09 0.00 0.09 15.75 0.08 0.00 0.08 16.00 0.08 0.00 0.08 16.25 0.07 0.00 0.07 16.50 0.07 0.00 0.07 16.75 0.07 0.00 0.07 17.00 0.06 0.00 0.06 17.25 0.06 0.00 0.06 17.50 0.06 0.00 0.06 17.75 0.06 0.00 0.06 18.00 0.06 0.00 0.06 18.25 0.06 0.00 0.06 18.50 0.05 0.00 0.05 18.75 0.05 0.00 0.05 19.00 0.05 0.00 0.05 19.25 0.05 0.00 0.05 19.50 0.05 0.00 0.05 19.75 0.04 0.00 0.04 20.00 0.04 0.00 0.04 20.25 0.04 0.00 0.04 20.50 0.04 0.00 0.04 20.75 0.04 0.00 0.04 21.00 0.04 0.00 0.04 21.25 0.04 0.00 0.04 21.50 0.04 0.00 0.04 21.75 0.04 0.00 0.04 22.00 0.04 0.00 0.04 22.25 0.04 0.00 0.04 22.50 0.04 0.00 0.04 22.75 0.04 0.00 0.04 23.00 0.04 0.00 0.04 23.25 0.04 0.00 0.04 23.50 0.03 0.00 0.03 23.75 0.03 0.00 0.03 24.00 0.03 0.00 0.03 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 s/n 06538 ©2017 HydroCAD Software Solutions LLC Page 40 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth >5.10" Tc=6.0 min CN=96 Runoff=6.25 cfs 0.348 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>4.75" Tc=6.0 min CN=93 Runoff=1.41 cfs 0.075 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>4.75" Tc=6.0 min CN=93 Runoff=3.62 cfs 0.194 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>3.39" Tc=6.0 min CN=80 Runoff=0.06 cfs 0.003 of Pond 4P: Pipe Storage Peak Elev=576.70' Storage=3,339 cf Inflow=6.25 cfs 0.348 of Outflow=3.48 cfs 0.347 of Link 8L: POA3 Inflow=3.51 cfs 0.350 of Primary=3.51 cfs 0.350 of Total Runoff Area = 1.510 ac Runoff Volume = 0.620 of Average Runoff Depth = 4.93" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type // 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Grow Printed 2/4/2020 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 6.25 cfs @ 11.96 hrs, Volume= 0.348 af, Depth> 5.10" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.750 98 Paved parking, HSG D 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 I I I I I I I I I I I I I I I I I ■ RunoH I I I I I I I I I I I I I I I I I I I I I I JI Type11'12_]hr I I I I I I I I I I I 110 YR Rainfall:;5.570' RunbffI I I I I I IA06=0.820 alp I I I I --R4n4ff:VpkjrP.e=O $4$-4f kunoff,Npih>5.'110i' I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 9 I I I I I I I I ---------------------N ----=----- I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 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 Time (hours) Post Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.01 2.25 0.14 0.01 0.01 2.50 0.16 0.01 0.01 2.75 0.17 0.02 0.02 3.00 0.19 0.02 0.02 3.25 0.21 0.03 0.02 3.50 0.23 0.04 0.03 3.75 0.25 0.05 0.03 4.00 0.27 0.06 0.03 4.25 0.29 0.07 0.04 4.50 0.31 0.08 0.04 4.75 0.33 0.09 0.04 5.00 0.35 0.10 0.05 5.25 0.37 0.12 0.05 5.50 0.40 0.13 0.05 5.75 0.42 0.15 0.05 6.00 0.45 0.17 0.06 6.25 0.47 0.19 0.06 6.50 0.50 0.21 0.06 6.75 0.52 0.23 0.07 7.00 0.55 0.25 0.07 7.25 0.58 0.27 0.07 7.50 0.61 0.29 0.08 7.75 0.64 0.32 0.08 8.00 0.67 0.34 0.08 8.25 0.70 0.37 0.09 8.50 0.74 0.40 0.10 8.75 0.78 0.43 0.11 9.00 0.82 0.47 0.12 9.25 0.86 0.51 0.13 9.50 0.91 0.55 0.13 9.75 0.96 0.59 0.14 10.00 1.01 0.64 0.16 10.25 1.07 0.69 0.18 10.50 1.14 0.75 0.21 10.75 1.22 0.83 0.25 11.00 1.31 0.91 0.29 11.25 1.43 1.02 0.38 11.50 1.58 1.17 0.49 11.75 2.16 1.73 2.19 12.00 3.69 3.24 5.78 12.25 3.93 3.47 0.77 12.50 4.09 3.63 0.49 12.75 4.21 3.74 0.36 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 3.84 0.30 13.25 4.38 3.92 0.26 13.50 4.45 3.99 0.23 13.75 4.51 4.05 0.20 14.00 4.57 4.10 0.18 14.25 4.62 4.15 0.16 14.50 4.67 4.20 0.16 14.75 4.71 4.25 0.15 15.00 4.75 4.29 0.14 15.25 4.79 4.33 0.13 15.50 4.83 4.37 0.12 15.75 4.87 4.40 0.12 16.00 4.90 4.43 0.11 16.25 4.93 4.47 0.10 16.50 4.96 4.50 0.10 16.75 4.99 4.53 0.10 17.00 5.02 4.56 0.09 17.25 5.05 4.58 0.09 17.50 5.08 4.61 0.09 17.75 5.10 4.64 0.09 18.00 5.13 4.66 0.08 18.25 5.15 4.69 0.08 18.50 5.18 4.71 0.08 18.75 5.20 4.73 0.07 19.00 5.22 4.75 0.07 19.25 5.24 4.78 0.07 19.50 5.26 4.80 0.07 19.75 5.28 4.82 0.06 20.00 5.30 4.83 0.06 20.25 5.32 4.85 0.06 20.50 5.34 4.87 0.06 20.75 5.36 4.89 0.06 21.00 5.37 4.90 0.06 21.25 5.39 4.92 0.06 21.50 5.41 4.94 0.06 21.75 5.43 4.96 0.06 22.00 5.44 4.97 0.06 22.25 5.46 4.99 0.05 22.50 5.47 5.00 0.05 22.75 5.49 5.02 0.05 23.00 5.51 5.04 0.05 23.25 5.52 5.05 0.05 23.50 5.54 5.07 0.05 23.75 5.55 5.08 0.05 24.00 5.57 5.10 0.05 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 1.41 cfs @ 11.96 hrs, Volume= 0.075 af, Depth> 4.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG D 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to POA2 Hydrograph ❑ Runoff Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.190 ac Runoff Volume=0.075 of Runoff Depth>4.75" LL Tc=6.0 min CN=93 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 Time (hours) Post Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 5S: Post-2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.01 0.00 3.75 0.25 0.01 0.00 4.00 0.27 0.02 0.00 4.25 0.29 0.02 0.00 4.50 0.31 0.03 0.00 4.75 0.33 0.03 0.01 5.00 0.35 0.04 0.01 5.25 0.37 0.05 0.01 5.50 0.40 0.06 0.01 5.75 0.42 0.07 0.01 6.00 0.45 0.08 0.01 6.25 0.47 0.10 0.01 6.50 0.50 0.11 0.01 6.75 0.52 0.12 0.01 7.00 0.55 0.14 0.01 7.25 0.58 0.16 0.01 7.50 0.61 0.17 0.01 7.75 0.64 0.19 0.01 8.00 0.67 0.21 0.01 8.25 0.70 0.23 0.02 8.50 0.74 0.26 0.02 8.75 0.78 0.28 0.02 9.00 0.82 0.31 0.02 9.25 0.86 0.35 0.02 9.50 0.91 0.38 0.03 9.75 0.96 0.42 0.03 10.00 1.01 0.46 0.03 10.25 1.07 0.50 0.04 10.50 1.14 0.56 0.04 10.75 1.22 0.62 0.05 11.00 1.31 0.70 0.06 11.25 1.43 0.80 0.08 11.50 1.58 0.93 0.10 11.75 2.16 1.46 0.48 12.00 3.69 2.92 1.30 12.25 3.93 3.15 0.17 12.50 4.09 3.31 0.11 12.75 4.21 3.42 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 3.51 0.07 13.25 4.38 3.59 0.06 13.50 4.45 3.66 0.05 13.75 4.51 3.72 0.05 14.00 4.57 3.77 0.04 14.25 4.62 3.82 0.04 14.50 4.67 3.87 0.04 14.75 4.71 3.91 0.03 15.00 4.75 3.96 0.03 15.25 4.79 4.00 0.03 15.50 4.83 4.03 0.03 15.75 4.87 4.07 0.03 16.00 4.90 4.10 0.02 16.25 4.93 4.13 0.02 16.50 4.96 4.16 0.02 16.75 4.99 4.19 0.02 17.00 5.02 4.22 0.02 17.25 5.05 4.25 0.02 17.50 5.08 4.27 0.02 17.75 5.10 4.30 0.02 18.00 5.13 4.33 0.02 18.25 5.15 4.35 0.02 18.50 5.18 4.37 0.02 18.75 5.20 4.40 0.02 19.00 5.22 4.42 0.02 19.25 5.24 4.44 0.02 19.50 5.26 4.46 0.02 19.75 5.28 4.48 0.01 20.00 5.30 4.50 0.01 20.25 5.32 4.51 0.01 20.50 5.34 4.53 0.01 20.75 5.36 4.55 0.01 21.00 5.37 4.57 0.01 21.25 5.39 4.58 0.01 21.50 5.41 4.60 0.01 21.75 5.43 4.62 0.01 22.00 5.44 4.63 0.01 22.25 5.46 4.65 0.01 22.50 5.47 4.66 0.01 22.75 5.49 4.68 0.01 23.00 5.51 4.70 0.01 23.25 5.52 4.71 0.01 23.50 5.54 4.73 0.01 23.75 5.55 4.74 0.01 24.00 5.57 4.76 0.01 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 6S: Post-1 to POM Runoff = 3.62 cfs @ 11.96 hrs, Volume= 0.194 af, Depth> 4.75" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG D 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 4 3 r Subcatchment 6S: Post-1 to POM Hydrograph Type II 24-hr 10 YR Rainfall=5.57" Runoff Area=0.490 ac Runoff Volume=0.194 of Runoff Depth>4.75" Tc=6.0 min CN=93 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 Time (hours) ❑ Runoff Post Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 6S: Post-1 to POM Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.01 0.01 3.75 0.25 0.01 0.01 4.00 0.27 0.02 0.01 4.25 0.29 0.02 0.01 4.50 0.31 0.03 0.01 4.75 0.33 0.03 0.01 5.00 0.35 0.04 0.02 5.25 0.37 0.05 0.02 5.50 0.40 0.06 0.02 5.75 0.42 0.07 0.02 6.00 0.45 0.08 0.02 6.25 0.47 0.10 0.03 6.50 0.50 0.11 0.03 6.75 0.52 0.12 0.03 7.00 0.55 0.14 0.03 7.25 0.58 0.16 0.03 7.50 0.61 0.17 0.03 7.75 0.64 0.19 0.04 8.00 0.67 0.21 0.04 8.25 0.70 0.23 0.04 8.50 0.74 0.26 0.05 8.75 0.78 0.28 0.05 9.00 0.82 0.31 0.06 9.25 0.86 0.35 0.06 9.50 0.91 0.38 0.07 9.75 0.96 0.42 0.07 10.00 1.01 0.46 0.08 10.25 1.07 0.50 0.10 10.50 1.14 0.56 0.11 10.75 1.22 0.62 0.13 11.00 1.31 0.70 0.16 11.25 1.43 0.80 0.21 11.50 1.58 0.93 0.27 11.75 2.16 1.46 1.23 12.00 3.69 2.92 3.36 12.25 3.93 3.15 0.45 12.50 4.09 3.31 0.29 12.75 4.21 3.42 0.21 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 3.51 0.18 13.25 4.38 3.59 0.15 13.50 4.45 3.66 0.13 13.75 4.51 3.72 0.12 14.00 4.57 3.77 0.10 14.25 4.62 3.82 0.10 14.50 4.67 3.87 0.09 14.75 4.71 3.91 0.09 15.00 4.75 3.96 0.08 15.25 4.79 4.00 0.08 15.50 4.83 4.03 0.07 15.75 4.87 4.07 0.07 16.00 4.90 4.10 0.06 16.25 4.93 4.13 0.06 16.50 4.96 4.16 0.06 16.75 4.99 4.19 0.06 17.00 5.02 4.22 0.06 17.25 5.05 4.25 0.05 17.50 5.08 4.27 0.05 17.75 5.10 4.30 0.05 18.00 5.13 4.33 0.05 18.25 5.15 4.35 0.05 18.50 5.18 4.37 0.05 18.75 5.20 4.40 0.04 19.00 5.22 4.42 0.04 19.25 5.24 4.44 0.04 19.50 5.26 4.46 0.04 19.75 5.28 4.48 0.04 20.00 5.30 4.50 0.04 20.25 5.32 4.51 0.03 20.50 5.34 4.53 0.03 20.75 5.36 4.55 0.03 21.00 5.37 4.57 0.03 21.25 5.39 4.58 0.03 21.50 5.41 4.60 0.03 21.75 5.43 4.62 0.03 22.00 5.44 4.63 0.03 22.25 5.46 4.65 0.03 22.50 5.47 4.66 0.03 22.75 5.49 4.68 0.03 23.00 5.51 4.70 0.03 23.25 5.52 4.71 0.03 23.50 5.54 4.73 0.03 23.75 5.55 4.74 0.03 24.00 5.57 4.76 0.03 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Timmons Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.06 cfs @ 11.97 hrs, Volume= 0.003 af, Depth> 3.39" Printed 2/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 0.010 80 >75% Grass cover, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 7S: Post-3B to POA3 Hydrograph ❑ Runoff -- - - -- I Type II 24-hr 10 YR Rainfall=5.57" Runoff'Atea=0.010 at Runoff V OMP 0.a Q0� f Runoff Depthy3.39" Tc=6.0.Min - I I I I I I i I I I I CN=80 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 Time (hours) Post Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Subcatchment 7S: Post-3B to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.00 7.50 0.61 0.00 0.00 7.75 0.64 0.01 0.00 8.00 0.67 0.01 0.00 8.25 0.70 0.01 0.00 8.50 0.74 0.02 0.00 8.75 0.78 0.03 0.00 9.00 0.82 0.04 0.00 9.25 0.86 0.05 0.00 9.50 0.91 0.06 0.00 9.75 0.96 0.07 0.00 10.00 1.01 0.09 0.00 10.25 1.07 0.11 0.00 10.50 1.14 0.13 0.00 10.75 1.22 0.16 0.00 11.00 1.31 0.20 0.00 11.25 1.43 0.25 0.00 11.50 1.58 0.32 0.00 11.75 2.16 0.66 0.02 12.00 3.69 1.79 0.05 12.25 3.93 1.99 0.01 12.50 4.09 2.12 0.01 12.75 4.21 2.21 0.00 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 4.30 2.29 0.00 13.25 4.38 2.36 0.00 13.50 4.45 2.42 0.00 13.75 4.51 2.47 0.00 14.00 4.57 2.52 0.00 14.25 4.62 2.56 0.00 14.50 4.67 2.60 0.00 14.75 4.71 2.64 0.00 15.00 4.75 2.68 0.00 15.25 4.79 2.71 0.00 15.50 4.83 2.75 0.00 15.75 4.87 2.78 0.00 16.00 4.90 2.81 0.00 16.25 4.93 2.83 0.00 16.50 4.96 2.86 0.00 16.75 4.99 2.89 0.00 17.00 5.02 2.91 0.00 17.25 5.05 2.94 0.00 17.50 5.08 2.96 0.00 17.75 5.10 2.98 0.00 18.00 5.13 3.01 0.00 18.25 5.15 3.03 0.00 18.50 5.18 3.05 0.00 18.75 5.20 3.07 0.00 19.00 5.22 3.09 0.00 19.25 5.24 3.11 0.00 19.50 5.26 3.13 0.00 19.75 5.28 3.14 0.00 20.00 5.30 3.16 0.00 20.25 5.32 3.17 0.00 20.50 5.34 3.19 0.00 20.75 5.36 3.21 0.00 21.00 5.37 3.22 0.00 21.25 5.39 3.24 0.00 21.50 5.41 3.25 0.00 21.75 5.43 3.27 0.00 22.00 5.44 3.28 0.00 22.25 5.46 3.30 0.00 22.50 5.47 3.31 0.00 22.75 5.49 3.33 0.00 23.00 5.51 3.34 0.00 23.25 5.52 3.35 0.00 23.50 5.54 3.37 0.00 23.75 5.55 3.38 0.00 24.00 5.57 3.40 0.00 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Pond 4P: Pipe Storage Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 5.10" for 10 YR event Inflow = 6.25 cfs @ 11.96 hrs, Volume= 0.348 of Outflow = 3.48 cfs @ 12.06 hrs, Volume= 0.347 af, Atten= 44%, Lag= 5.7 min Primary = 3.48 cfs @ 12.06 hrs, Volume= 0.347 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 576.70' @ 12.06 hrs Surf.Area= 1,590 sf Storage= 3,339 cf Plug -Flow detention time=17.0 min calculated for 0.347 of (100% of inflow) Center -of -Mass det. time= 14.1 min ( 769.6 - 755.5 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 574.50' / 573.75' S= 0.0100 '/' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=3.47 cfs @ 12.06 hrs HW=576.69' (Free Discharge) t1=Culvert (Barrel Controls 3.47 cfs @ 4.41 fps) �2=Orifice/Grate (Passes < 1.77 cfs potential flow) 3=S harp-C rested Rectangular Weir(Passes < 6.54 cfs potential flow) Post I Timmons Pond 412: Pipe Storage Hydrograph E 4 5 6 7 8 9 10 11 12 13 Time (hours) Type // 24-hr 10 YR Rainfall=5.57" Printed 2/4/2020 ni 16W AreaOO:,`820 ac :POt ttbra6e=3'�339 cf „ „ „ „ „ „ „ „ Pond 413: Pipe Storage Stage -Discharge Discharge Ids) ■ Inflow ■ Pdmary ■ Pdmary Post Type // 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Grow Printed 2/4/2020 Pond 412: Pipe Storage Stage -Area -Storage ■ Srorage Storage (cubic -feet) Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0.00 0 574.50 0.00 1.50 0.00 0 574.50 0.00 2.00 0.01 6 574.53 0.00 2.50 0.01 18 574.55 0.01 3.00 0.02 28 574.57 0.02 3.50 0.03 36 574.59 0.02 4.00 0.03 43 574.60 0.03 4.50 0.04 49 574.61 0.04 5.00 0.05 56 574.62 0.04 5.50 0.05 62 574.63 0.05 6.00 0.06 68 574.63 0.05 6.50 0.06 73 574.64 0.06 7.00 0.07 79 574.65 0.07 7.50 0.08 84 574.66 0.07 8.00 0.08 89 574.66 0.08 8.50 0.10 99 574.67 0.09 9.00 0.12 116 574.69 0.11 9.50 0.13 125 574.70 0.13 10.00 0.16 139 574.72 0.15 10.50 0.21 171 574.75 0.19 11.00 0.29 222 574.80 0.26 11.50 0.49 326 574.89 0.41 12.00 5.78 3,109 576.56 3.35 12.50 0.49 1,510 575.66 1.20 13.00 0.30 514 575.04 0.64 13.50 0.23 237 574.81 0.28 14.00 0.18 178 574.76 0.20 14.50 0.16 153 574.73 0.16 15.00 0.14 140 574.72 0.15 15.50 0.12 127 574.71 0.13 16.00 0.11 116 574.69 0.11 16.50 0.10 107 574.68 0.10 17.00 0.09 103 574.68 0.10 17.50 0.09 98 574.67 0.09 18.00 0.08 94 574.67 0.09 18.50 0.08 89 574.66 0.08 19.00 0.07 85 574.66 0.07 19.50 0.07 80 574.65 0.07 20.00 0.06 75 574.64 0.06 20.50 0.06 72 574.64 0.06 21.00 0.06 71 574.64 0.06 21.50 0.06 70 574.64 0.06 22.00 0.06 69 574.64 0.06 22.50 0.05 68 574.63 0.05 23.00 0.05 67 574.63 0.05 23.50 0.05 66 574.63 0.05 24.00 0.05 65 574.63 0.05 Post Timmons Elevation Primary (feet) (cfs) 574.50 0.00 574.52 0.00 574.54 0.00 574.56 0.01 574.58 0.02 574.60 0.03 574.62 0.04 574.64 0.06 574.66 0.08 574.68 0.10 574.70 0.12 574.72 0.15 574.74 0.17 574.76 0.20 574.78 0.23 574.80 0.26 574.82 0.29 574.84 0.32 574.86 0.35 574.88 0.39 574.90 0.42 574.92 0.45 574.94 0.49 574.96 0.52 574.98 0.56 575.00 0.59 575.02 0.62 575.04 0.65 575.06 0.67 575.08 0.69 575.10 0.71 575.12 0.74 575.14 0.76 575.16 0.78 575.18 0.80 575.20 0.82 575.22 0.84 575.24 0.86 575.26 0.88 575.28 0.90 575.30 0.92 575.32 0.94 575.34 0.95 575.36 0.97 575.38 0.99 575.40 1.00 575.42 1.02 575.44 1.04 575.46 1.05 575.48 1.07 575.50 1.08 575.52 1.10 Type II 24-hr 10 YR Rainfall=5.57" Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) (cfs) 575.54 1.11 575.56 1.13 575.58 1.14 575.60 1.16 575.62 1.17 575.64 1.19 575.66 1.20 575.68 1.21 575.70 1.23 575.72 1.24 575.74 1.25 575.76 1.27 575.78 1.28 575.80 1.29 575.82 1.30 575.84 1.32 575.86 1.33 575.88 1.34 575.90 1.35 575.92 1.39 575.94 1.46 575.96 1.53 575.98 1.62 576.00 1.72 576.02 1.83 576.04 1.95 576.06 2.07 576.08 2.20 576.10 2.34 576.12 2.48 576.14 2.63 576.16 2.78 576.18 2.94 576.20 3.00 576.22 3.02 576.24 3.04 576.26 3.06 576.28 3.08 576.30 3.10 576.32 3.12 576.34 3.14 576.36 3.16 576.38 3.18 576.40 3.20 576.42 3.22 576.44 3.24 576.46 3.25 576.48 3.27 576.50 3.29 576.52 3.31 576.54 3.33 576.56 3.35 Elevation Primary (feet) (cfs) 576.58 3.37 576.60 3.38 576.62 3.40 576.64 3.42 576.66 3.44 576.68 3.46 576.70 3.48 576.72 3.49 576.74 3.51 576.76 3.53 576.78 3.55 576.80 3.56 576.82 3.58 576.84 3.60 576.86 3.61 576.88 3.63 576.90 3.65 576.92 3.67 576.94 3.68 576.96 3.70 576.98 3.72 577.00 3.73 577.02 3.75 577.04 3.77 577.06 3.78 577.08 3.80 577.10 3.81 577.12 3.83 577.14 3.85 577.16 3.86 577.18 3.88 577.20 3.90 577.22 3.91 577.24 3.93 577.26 3.94 577.28 3.96 577.30 3.97 577.32 3.99 577.34 4.00 577.36 4.02 577.38 4.04 577.40 4.05 577.42 4.07 577.44 4.08 577.46 4.10 577.48 4.11 577.50 4.13 Printed 2/4/2020 Post Timmons Elevation Storage (feet) (cubic -feet) 574.50 0 574.52 4 574.54 11 574.56 20 574.58 31 574.60 43 574.62 57 574.64 72 574.66 87 574.68 104 574.70 121 574.72 140 574.74 159 574.76 179 574.78 199 574.80 221 574.82 243 574.84 265 574.86 288 574.88 312 574.90 336 574.92 361 574.94 386 574.96 412 574.98 438 575.00 465 575.02 492 575.04 519 575.06 547 575.08 575 575.10 604 575.12 633 575.14 662 575.16 692 575.18 722 575.20 752 575.22 783 575.24 814 575.26 845 575.28 876 575.30 908 575.32 940 575.34 972 575.36 1,005 575.38 1,037 575.40 1,070 575.42 1,103 575.44 1,137 575.46 1,170 575.48 1,204 575.50 1,238 575.52 1,272 Type II 24-hr 10 YR Rainfall=5.57" Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 575.54 1,306 575.56 1,340 575.58 1,375 575.60 1,409 575.62 1,444 575.64 1,479 575.66 1,514 575.68 1,549 575.70 1,584 575.72 1,620 575.74 1,655 575.76 1,690 575.78 1,726 575.80 1,762 575.82 1,797 575.84 1,833 575.86 1,869 575.88 1,905 575.90 1,941 575.92 1,977 575.94 2,013 575.96 2,049 575.98 2,085 576.00 2,121 576.02 2,157 576.04 2,193 576.06 2,229 576.08 2,265 576.10 2,300 576.12 2,336 576.14 2,372 576.16 2,408 576.18 2,444 576.20 2,480 576.22 2,515 576.24 2,551 576.26 2,586 576.28 2,622 576.30 2,657 576.32 2,692 576.34 2,727 576.36 2,762 576.38 2,797 576.40 2,832 576.42 2,867 576.44 2,901 576.46 2,935 576.48 2,970 576.50 3,004 576.52 3,037 576.54 3,071 576.56 3,105 Elevation Storage (feet) (cubic -feet) 576.58 3,138 576.60 3,171 576.62 3,204 576.64 3,237 576.66 3,269 576.68 3,301 576.70 3,333 576.72 3,365 576.74 3,396 576.76 3,428 576.78 3,458 576.80 3,489 576.82 3,519 576.84 3,549 576.86 3,579 576.88 3,608 576.90 3,637 576.92 3,666 576.94 3,694 576.96 3,722 576.98 3,749 577.00 3,777 577.02 3,803 577.04 3,829 577.06 3,855 577.08 3,880 577.10 3,905 577.12 3,929 577.14 3,953 577.16 3,976 577.18 3,999 577.20 4,020 577.22 4,042 577.24 4,062 577.26 4,082 577.28 4,101 577.30 4,120 577.32 4,137 577.34 4,154 577.36 4,170 577.38 4,184 577.40 4,198 577.42 4,210 577.44 4,221 577.46 4,230 577.48 4,237 577.50 4,241 Printed 2/4/2020 Post Type II 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 2/4/2020 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 5.05" for 10 YR event Inflow = 3.51 cfs @ 12.05 hrs, Volume= 0.350 of Primary = 3.51 cfs @ 12.05 hrs, Volume= 0.350 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph ❑ Inflow ❑ Primary Time (hours) Post Timmons Type II 24-hr 10 YR Rainfall=5.57" Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.75 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.00 0.00 0.00 1.75 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.25 0.00 0.00 0.00 2.50 0.01 0.00 0.01 2.75 0.01 0.00 0.01 3.00 0.02 0.00 0.02 3.25 0.02 0.00 0.02 3.50 0.02 0.00 0.02 3.75 0.03 0.00 0.03 4.00 0.03 0.00 0.03 4.25 0.03 0.00 0.03 4.50 0.04 0.00 0.04 4.75 0.04 0.00 0.04 5.00 0.04 0.00 0.04 5.25 0.04 0.00 0.04 5.50 0.05 0.00 0.05 5.75 0.05 0.00 0.05 6.00 0.05 0.00 0.05 6.25 0.06 0.00 0.06 6.50 0.06 0.00 0.06 6.75 0.06 0.00 0.06 7.00 0.07 0.00 0.07 7.25 0.07 0.00 0.07 7.50 0.07 0.00 0.07 7.75 0.08 0.00 0.08 8.00 0.08 0.00 0.08 8.25 0.08 0.00 0.08 8.50 0.09 0.00 0.09 8.75 0.10 0.00 0.10 9.00 0.12 0.00 0.12 9.25 0.12 0.00 0.12 9.50 0.13 0.00 0.13 9.75 0.13 0.00 0.13 10.00 0.15 0.00 0.15 10.25 0.17 0.00 0.17 10.50 0.19 0.00 0.19 10.75 0.22 0.00 0.22 11.00 0.26 0.00 0.26 11.25 0.32 0.00 0.32 11.50 0.41 0.00 0.41 11.75 0.87 0.00 0.87 12.00 3.40 0.00 3.40 12.25 1.95 0.00 1.95 12.50 1.20 0.00 1.20 12.75 0.93 0.00 0.93 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.64 0.00 0.64 13.25 0.39 0.00 0.39 13.50 0.28 0.00 0.28 13.75 0.23 0.00 0.23 14.00 0.20 0.00 0.20 14.25 0.18 0.00 0.18 14.50 0.17 0.00 0.17 14.75 0.16 0.00 0.16 15.00 0.15 0.00 0.15 15.25 0.14 0.00 0.14 15.50 0.13 0.00 0.13 15.75 0.12 0.00 0.12 16.00 0.12 0.00 0.12 16.25 0.11 0.00 0.11 16.50 0.10 0.00 0.10 16.75 0.10 0.00 0.10 17.00 0.10 0.00 0.10 17.25 0.10 0.00 0.10 17.50 0.09 0.00 0.09 17.75 0.09 0.00 0.09 18.00 0.09 0.00 0.09 18.25 0.08 0.00 0.08 18.50 0.08 0.00 0.08 18.75 0.08 0.00 0.08 19.00 0.08 0.00 0.08 19.25 0.07 0.00 0.07 19.50 0.07 0.00 0.07 19.75 0.07 0.00 0.07 20.00 0.06 0.00 0.06 20.25 0.06 0.00 0.06 20.50 0.06 0.00 0.06 20.75 0.06 0.00 0.06 21.00 0.06 0.00 0.06 21.25 0.06 0.00 0.06 21.50 0.06 0.00 0.06 21.75 0.06 0.00 0.06 22.00 0.06 0.00 0.06 22.25 0.06 0.00 0.06 22.50 0.06 0.00 0.06 22.75 0.05 0.00 0.05 23.00 0.05 0.00 0.05 23.25 0.05 0.00 0.05 23.50 0.05 0.00 0.05 23.75 0.05 0.00 0.05 24.00 0.05 0.00 0.05 Printed 2/4/2020 Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 HydroCAD® 10.00-20 s/n 06538 ©2017 HydroCAD Software Solutions LLC Page 57 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment2S: Post-3Ato POA3 Runoff Area=0.820 ac 91.46% Impervious Runoff Depth>8.65" Tc=6.0 min CN=96 Runoff=10.36 cfs 0.591 of Subcatchment5S: Post-2 to POA2 Runoff Area=0.190 ac 73.68% Impervious Runoff Depth>8.29" Tc=6.0 min CN=93 Runoff=2.37 cfs 0.131 of Subcatchment6S: Post-1 to POA1 Runoff Area=0.490 ac 71.43% Impervious Runoff Depth>8.29" Tc=6.0 min CN=93 Runoff=6.11 cfs 0.338 of Subcatchment7S: Post-313 to POA3 Runoff Area=0.010 ac 0.00% Impervious Runoff Depth>6.69" Tc=6.0 min CN=80 Runoff=0.l l cfs 0.006 of Pond 4P: Pipe Storage Peak Elev=614.00' Storage=4,241 cf Inflow=10.36 cfs 0.591 of Outflow=15.59 cfs 0.589 of Link 8L: POA3 Inflow=15.69 cfs 0.595 of Primary=15.69 cfs 0.595 of Total Runoff Area = 1.510 ac Runoff Volume = 1.066 of Average Runoff Depth = 8.47" 17.88% Pervious = 0.270 ac 82.12% Impervious = 1.240 ac Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 2S: Post-3A to POA3 Runoff = 10.36 cfs @ 11.96 hrs, Volume= 0.591 af, Depth> 8.65" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.750 98 Paved parking, HSG D 0.070 80 >75% Grass cover, Good, HSG D 0.820 96 Weighted Average 0.070 8.54% Pervious Area 0.750 91.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: Post-3A to POA3 11Eic 10 T 9 - r-r-r--r--Y--r--r--r--r--r _. 8 .... 6 - r_-I--r--Y--Y--r--r--r-_I_. 3 2 --�--r-r--r--r-- ❑Runoff Type II 24-hr i100-M RZainf811:;9.14"' TR(indfFAFet=II8M a1- - ----kunofFNpih>&.0U __1--1--L--L--L-J--J--1- L - ------------------------- - Post Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 2S: Post-3A to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.01 1.50 0.15 0.01 0.02 1.75 0.17 0.02 0.03 2.00 0.20 0.03 0.03 2.25 0.23 0.04 0.04 2.50 0.26 0.05 0.05 2.75 0.29 0.07 0.05 3.00 0.32 0.08 0.06 3.25 0.35 0.10 0.06 3.50 0.38 0.12 0.07 3.75 0.41 0.14 0.07 4.00 0.44 0.16 0.07 4.25 0.47 0.19 0.08 4.50 0.50 0.21 0.08 4.75 0.54 0.24 0.09 5.00 0.58 0.27 0.09 5.25 0.61 0.30 0.10 5.50 0.65 0.33 0.10 5.75 0.69 0.36 0.11 6.00 0.73 0.39 0.11 6.25 0.77 0.43 0.12 6.50 0.82 0.47 0.12 6.75 0.86 0.51 0.13 7.00 0.90 0.55 0.13 7.25 0.95 0.59 0.14 7.50 1.00 0.63 0.14 7.75 1.05 0.67 0.15 8.00 1.10 0.72 0.15 8.25 1.15 0.77 0.16 8.50 1.21 0.82 0.18 8.75 1.27 0.88 0.20 9.00 1.34 0.95 0.22 9.25 1.42 1.02 0.23 9.50 1.49 1.09 0.23 9.75 1.57 1.16 0.25 10.00 1.65 1.24 0.28 10.25 1.75 1.34 0.32 10.50 1.86 1.44 0.36 10.75 1.99 1.57 0.43 11.00 2.15 1.72 0.50 11.25 2.34 1.90 0.64 11.50 2.59 2.15 0.82 11.75 3.54 3.08 3.67 12.00 6.06 5.59 9.56 12.25 6.45 5.98 1.27 12.50 6.72 6.24 0.81 12.75 6.90 6.43 0.59 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 6.58 0.50 13.25 7.19 6.71 0.43 13.50 7.30 6.83 0.37 13.75 7.40 6.93 0.33 14.00 7.49 7.02 0.29 14.25 7.58 7.10 0.27 14.50 7.66 7.18 0.26 14.75 7.73 7.25 0.24 15.00 7.80 7.32 0.23 15.25 7.87 7.39 0.22 15.50 7.93 7.45 0.20 15.75 7.99 7.51 0.19 16.00 8.04 7.56 0.18 16.25 8.10 7.62 0.17 16.50 8.15 7.67 0.17 16.75 8.19 7.71 0.16 17.00 8.24 7.76 0.16 17.25 8.29 7.81 0.15 17.50 8.33 7.85 0.15 17.75 8.38 7.90 0.14 18.00 8.42 7.94 0.14 18.25 8.46 7.98 0.13 18.50 8.50 8.02 0.13 18.75 8.53 8.05 0.12 19.00 8.57 8.09 0.12 19.25 8.61 8.13 0.11 19.50 8.64 8.16 0.11 19.75 8.67 8.19 0.10 20.00 8.70 8.22 0.10 20.25 8.73 8.25 0.10 20.50 8.76 8.28 0.10 20.75 8.79 8.31 0.10 21.00 8.82 8.34 0.09 21.25 8.85 8.37 0.09 21.50 8.87 8.39 0.09 21.75 8.90 8.42 0.09 22.00 8.93 8.45 0.09 22.25 8.96 8.48 0.09 22.50 8.98 8.50 0.09 22.75 9.01 8.53 0.09 23.00 9.04 8.56 0.09 23.25 9.06 8.58 0.09 23.50 9.09 8.61 0.09 23.75 9.11 8.63 0.08 24.00 9.14 8.66 0.08 Printed 2/4/2020 Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 5S: Post-2 to POA2 Runoff = 2.37 cfs @ 11.96 hrs, Volume= 0.131 af, Depth> 8.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.050 80 >75% Grass cover, Good, HSG D 0.140 98 Paved parking, HSG D 0.190 93 Weighted Average 0.050 26.32% Pervious Area 0.140 73.68% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: Post-2 to POA2 Hydrograph ❑ Runoff Type II 24-hr 100 YR Rainfall=9.14" 2 Runoff Area=0.190 ac Runoff Volume=0.131 of Runoff Depth>8.29" LL Tc=6.0 min 'I 1 11 1 CN=93 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 Time (hours) Post Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment SS: Post-2 to POA2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.01 0.00 2.50 0.26 0.01 0.00 2.75 0.29 0.02 0.01 3.00 0.32 0.03 0.01 3.25 0.35 0.04 0.01 3.50 0.38 0.05 0.01 3.75 0.41 0.07 0.01 4.00 0.44 0.08 0.01 4.25 0.47 0.10 0.01 4.50 0.50 0.11 0.01 4.75 0.54 0.13 0.01 5.00 0.58 0.15 0.02 5.25 0.61 0.18 0.02 5.50 0.65 0.20 0.02 5.75 0.69 0.23 0.02 6.00 0.73 0.25 0.02 6.25 0.77 0.28 0.02 6.50 0.82 0.31 0.02 6.75 0.86 0.34 0.02 7.00 0.90 0.38 0.03 7.25 0.95 0.41 0.03 7.50 1.00 0.45 0.03 7.75 1.05 0.49 0.03 8.00 1.10 0.53 0.03 8.25 1.15 0.57 0.03 8.50 1.21 0.62 0.04 8.75 1.27 0.67 0.04 9.00 1.34 0.73 0.05 9.25 1.42 0.79 0.05 9.50 1.49 0.86 0.05 9.75 1.57 0.93 0.05 10.00 1.65 1.00 0.06 10.25 1.75 1.09 0.07 10.50 1.86 1.19 0.08 10.75 1.99 1.31 0.09 11.00 2.15 1.45 0.11 11.25 2.34 1.63 0.14 11.50 2.59 1.86 0.18 11.75 3.54 2.77 0.83 12.00 6.06 5.24 2.19 12.25 6.45 5.63 0.29 12.50 6.72 5.89 0.19 12.75 6.90 6.07 0.14 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 6.23 0.11 13.25 7.19 6.36 0.10 13.50 7.30 6.47 0.09 13.75 7.40 6.57 0.08 14.00 7.49 6.66 0.07 14.25 7.58 6.74 0.06 14.50 7.66 6.82 0.06 14.75 7.73 6.90 0.06 15.00 7.80 6.97 0.05 15.25 7.87 7.03 0.05 15.50 7.93 7.09 0.05 15.75 7.99 7.15 0.04 16.00 8.04 7.21 0.04 16.25 8.10 7.26 0.04 16.50 8.15 7.31 0.04 16.75 8.19 7.36 0.04 17.00 8.24 7.40 0.04 17.25 8.29 7.45 0.03 17.50 8.33 7.49 0.03 17.75 8.38 7.54 0.03 18.00 8.42 7.58 0.03 18.25 8.46 7.62 0.03 18.50 8.50 7.66 0.03 18.75 8.53 7.69 0.03 19.00 8.57 7.73 0.03 19.25 8.61 7.76 0.03 19.50 8.64 7.80 0.03 19.75 8.67 7.83 0.02 20.00 8.70 7.86 0.02 20.25 8.73 7.89 0.02 20.50 8.76 7.92 0.02 20.75 8.79 7.95 0.02 21.00 8.82 7.97 0.02 21.25 8.85 8.00 0.02 21.50 8.87 8.03 0.02 21.75 8.90 8.06 0.02 22.00 8.93 8.09 0.02 22.25 8.96 8.11 0.02 22.50 8.98 8.14 0.02 22.75 9.01 8.17 0.02 23.00 9.04 8.19 0.02 23.25 9.06 8.22 0.02 23.50 9.09 8.24 0.02 23.75 9.11 8.27 0.02 24.00 9.14 8.29 0.02 Printed 2/4/2020 Post Type/1 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Subcatchment 6S: Post-1 to POA1 Runoff = 6.11 cfs @ 11.96 hrs, Volume= 0.338 af, Depth> 8.29" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.140 80 >75% Grass cover, Good, HSG D 0.350 98 Paved parking, HSG D 0.490 93 Weighted Average 0.140 28.57% Pervious Area 0.350 71.43% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 6S: Post-1 to POA1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 6- 4 M TO- I I I I I I I I I I I I I I I I I I I I I I E 3 I I I I I I I I I I I I I I I I I I 2 I I I I I I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I ■ Runoff I I I I I I I I I I I I I I I I I I I I I I T 'pe II'124-Mr I I I I I I I I I I I 110(t YR-Rainfa11:;9.114"_ I I I I I i I I I I Rwnbff Areb=0.490 ad I I I I I I I I I - kunoff bipih>8.29i' I I I I I I I I I I ------------- T- -- 1I I I I c-,.II Trutt I I I I I I I I I I I I I I I I I I I I I I I I I N=9 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 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 Time (hours) Post Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 6S: Post-1 to POM Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.01 2.25 0.23 0.01 0.01 2.50 0.26 0.01 0.01 2.75 0.29 0.02 0.02 3.00 0.32 0.03 0.02 3.25 0.35 0.04 0.02 3.50 0.38 0.05 0.02 3.75 0.41 0.07 0.03 4.00 0.44 0.08 0.03 4.25 0.47 0.10 0.03 4.50 0.50 0.11 0.04 4.75 0.54 0.13 0.04 5.00 0.58 0.15 0.04 5.25 0.61 0.18 0.04 5.50 0.65 0.20 0.05 5.75 0.69 0.23 0.05 6.00 0.73 0.25 0.05 6.25 0.77 0.28 0.06 6.50 0.82 0.31 0.06 6.75 0.86 0.34 0.06 7.00 0.90 0.38 0.07 7.25 0.95 0.41 0.07 7.50 1.00 0.45 0.07 7.75 1.05 0.49 0.08 8.00 1.10 0.53 0.08 8.25 1.15 0.57 0.09 8.50 1.21 0.62 0.10 8.75 1.27 0.67 0.11 9.00 1.34 0.73 0.12 9.25 1.42 0.79 0.12 9.50 1.49 0.86 0.13 9.75 1.57 0.93 0.14 10.00 1.65 1.00 0.15 10.25 1.75 1.09 0.18 10.50 1.86 1.19 0.20 10.75 1.99 1.31 0.24 11.00 2.15 1.45 0.28 11.25 2.34 1.63 0.37 11.50 2.59 1.86 0.47 11.75 3.54 2.77 2.13 12.00 6.06 5.24 5.65 12.25 6.45 5.63 0.75 12.50 6.72 5.89 0.48 12.75 6.90 6.07 0.35 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 6.23 0.29 13.25 7.19 6.36 0.25 13.50 7.30 6.47 0.22 13.75 7.40 6.57 0.20 14.00 7.49 6.66 0.17 14.25 7.58 6.74 0.16 14.50 7.66 6.82 0.15 14.75 7.73 6.90 0.15 15.00 7.80 6.97 0.14 15.25 7.87 7.03 0.13 15.50 7.93 7.09 0.12 15.75 7.99 7.15 0.11 16.00 8.04 7.21 0.11 16.25 8.10 7.26 0.10 16.50 8.15 7.31 0.10 16.75 8.19 7.36 0.10 17.00 8.24 7.40 0.09 17.25 8.29 7.45 0.09 17.50 8.33 7.49 0.09 17.75 8.38 7.54 0.08 18.00 8.42 7.58 0.08 18.25 8.46 7.62 0.08 18.50 8.50 7.66 0.08 18.75 8.53 7.69 0.07 19.00 8.57 7.73 0.07 19.25 8.61 7.76 0.07 19.50 8.64 7.80 0.06 19.75 8.67 7.83 0.06 20.00 8.70 7.86 0.06 20.25 8.73 7.89 0.06 20.50 8.76 7.92 0.06 20.75 8.79 7.95 0.06 21.00 8.82 7.97 0.06 21.25 8.85 8.00 0.06 21.50 8.87 8.03 0.06 21.75 8.90 8.06 0.05 22.00 8.93 8.09 0.05 22.25 8.96 8.11 0.05 22.50 8.98 8.14 0.05 22.75 9.01 8.17 0.05 23.00 9.04 8.19 0.05 23.25 9.06 8.22 0.05 23.50 9.09 8.24 0.05 23.75 9.11 8.27 0.05 24.00 9.14 8.29 0.05 Printed 2/4/2020 Post Type 11 24-hr 100 YR Rainfall=9.14" Timmons Summary for Subcatchment 7S: Post-3B to POA3 Runoff = 0.11 cfs @ 11.97 hrs, Volume= 0.006 af, Depth> 6.69" Printed 2/4/2020 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 0.010 80 >75% Grass cover, Good, HSG D 0.010 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, 0. 0.1 0. 0.11 Subcatchment 7S: Post-3B to POA3 Hydrograph --r-1--,----r--r-T-1—r _Ji__ I I I I I ----J--JI--J- j --II --II-JI--J--L-_. I I I I I -----J--1--L--L----J--J--1--� ----------------- y y y Y F 7 y ± I I I I I I I I I I _l _T _ I _T _7 _+ _Y _r _I _7 _i _T_ I I I I I I I I I I --- I I I I I- I I I I I I I I i I I I I iI I i- L-- L-- Ii -J- -- ----Ty.pe 11.24-hr I I I I -==10$1MRI�iti 'IMIJ_4"- I I I I I I I I I I --'�-- ]�iinb�f"LAke�=QIIi II alp= I I I n91��/`yA�r� -I-m- Unof#'IDepth; 669�r _�Jr/�_J ._yI_�_ Tc�e.-o-M1#1 I l l l l l i C1:N�8� I I I ------------- ------------ ---- IIIIIIIII III II _ _I--�--r-r--r-r--I--�--T--T--r _ 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 Time (hours) ❑ Runoff Post Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Subcatchment 7S: Post-3B to POA3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.00 4.50 0.50 0.00 0.00 4.75 0.54 0.00 0.00 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.00 5.50 0.65 0.01 0.00 5.75 0.69 0.01 0.00 6.00 0.73 0.02 0.00 6.25 0.77 0.03 0.00 6.50 0.82 0.04 0.00 6.75 0.86 0.05 0.00 7.00 0.90 0.06 0.00 7.25 0.95 0.07 0.00 7.50 1.00 0.08 0.00 7.75 1.05 0.10 0.00 8.00 1.10 0.12 0.00 8.25 1.15 0.13 0.00 8.50 1.21 0.16 0.00 8.75 1.27 0.18 0.00 9.00 1.34 0.21 0.00 9.25 1.42 0.25 0.00 9.50 1.49 0.28 0.00 9.75 1.57 0.32 0.00 10.00 1.65 0.36 0.00 10.25 1.75 0.42 0.00 10.50 1.86 0.48 0.00 10.75 1.99 0.56 0.00 11.00 2.15 0.65 0.00 11.25 2.34 0.78 0.01 11.50 2.59 0.95 0.01 11.75 3.54 1.67 0.03 12.00 6.06 3.84 0.10 12.25 6.45 4.19 0.01 12.50 6.72 4.43 0.01 12.75 6.90 4.60 0.01 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 13.00 7.06 4.75 0.01 13.25 7.19 4.87 0.00 13.50 7.30 4.97 0.00 13.75 7.40 5.07 0.00 14.00 7.49 5.15 0.00 14.25 7.58 5.23 0.00 14.50 7.66 5.30 0.00 14.75 7.73 5.37 0.00 15.00 7.80 5.44 0.00 15.25 7.87 5.50 0.00 15.50 7.93 5.56 0.00 15.75 7.99 5.61 0.00 16.00 8.04 5.67 0.00 16.25 8.10 5.71 0.00 16.50 8.15 5.76 0.00 16.75 8.19 5.81 0.00 17.00 8.24 5.85 0.00 17.25 8.29 5.90 0.00 17.50 8.33 5.94 0.00 17.75 8.38 5.98 0.00 18.00 8.42 6.02 0.00 18.25 8.46 6.06 0.00 18.50 8.50 6.09 0.00 18.75 8.53 6.13 0.00 19.00 8.57 6.16 0.00 19.25 8.61 6.20 0.00 19.50 8.64 6.23 0.00 19.75 8.67 6.26 0.00 20.00 8.70 6.29 0.00 20.25 8.73 6.31 0.00 20.50 8.76 6.34 0.00 20.75 8.79 6.37 0.00 21.00 8.82 6.40 0.00 21.25 8.85 6.42 0.00 21.50 8.87 6.45 0.00 21.75 8.90 6.48 0.00 22.00 8.93 6.50 0.00 22.25 8.96 6.53 0.00 22.50 8.98 6.55 0.00 22.75 9.01 6.58 0.00 23.00 9.04 6.60 0.00 23.25 9.06 6.63 0.00 23.50 9.09 6.65 0.00 23.75 9.11 6.68 0.00 24.00 9.14 6.70 0.00 Printed 2/4/2020 Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Pond 4P: Pipe Storage [931 Warning: Storage range exceeded by 36.50' [881 Warning: Qout>Qin may require smaller dt or Finer Routing Inflow Area = 0.820 ac, 91.46% Impervious, Inflow Depth > 8.65" for 100 YR event Inflow = 10.36 cfs @ 11.96 hrs, Volume= 0.591 of Outflow = 15.59 cfs @ 12.00 hrs, Volume= 0.589 af, Atten= 0%, Lag= 2.3 min Primary = 15.59 cfs @ 12.00 hrs, Volume= 0.589 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 614.00' @ 12.00 hrs Surf.Area= 0 sf Storage= 4,241 cf Plug -Flow detention time=14.7 min calculated for 0.588 of (99% of inflow) Center -of -Mass det. time= 12.6 min ( 757.9 - 745.3 ) Volume Invert Avail.Storage Storage Description #1 574.50' 4,241 cf 36.0" Round Pipe Storage L= 600.0' Device Routing Invert Outlet Devices #1 Primary 574.50' 12.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 574.50' / 573.75' S= 0.0100 '/' Cc= 0.900 n= 0.018 Corrugated PE, corrugated interior, Flow Area= 0.79 sf #2 Device 1 574.50' 7.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 575.90' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=15.52 cfs @ 12.00 hrs HW=613.64' (Free Discharge) t1=Culvert (Barrel Controls 15.52 cfs @ 19.76 fps) �2=Orifice/Grate (Passes < 8.02 cfs potential flow) 3=S harp-C rested Rectangular Weir(Passes < 1,137.27 cfs potential flow) Post a c 0 w W1 Timmons Pond 4P: Pipe Storage Hydrograph Type // 24-hr 100 YR Rainfall=9.14" Printed 2/4/2020 ----,--T--r--r----,--r--r----,--r--r--r-,--T--r----,--T--r--r--I I I II ____-__r__r__,___,__r__r__,___,__r____r__,__r__r__r__,__�__r__r__r__,__ -- - ' 1559cfs - nfil nr A � �� IL k 11EieV= '4 ` -,- I I I I I I I I , I I I I I --Storage= 11�241'1,ef- ,� ,— ---,--T --r --i----,--r — — — —- --r--i ———T—— r----,——T--r--r ——I-- 1 1 1 I--y--t--r--I---I--Y--r--I--—- --r--I--y--T--r--I--J--t--r--r--I-- I 1 1 1 1 1 1 1 1 1 1 1 _I _J _A _4 1 1 __L__I__J__1__L_ I__J__1__L__L_J__ 1 1 1 1 , _L _I _J _1 _L_J _J _1 _L _L_J I I I I I ' I i —T —r —i —I — i —r —I , ' I —I —, —T —r 4 5 6 7 18 19 20 21 22 23 24 Time (hours) Pond 4P: Pipe Storage Stage -Discharge I ___T---,----r___T----r---r___r_--T----r---T---,I ---- r ---r---,-- r- I I I I I I I I I I I I I I I ___T---,---'r___T----r---r---r-'-T----r---T---,----r---r r- I I ---T--- r- --r- - -T I r___r___r____r___r___, I --r-- , - - - - r- I --- _--- _---- _--- _-------- _--- _--- _---- _--- ___ I I I I I ____________________________ I I I I I I --- _--- _---- _--- _-------- _--- _--- _---- _--- _--- _--- --- _--- _______ I I I I I I I I I I I I I _ ____I_ ________ _____________I____I_________I_ __I_________I____I __ I I I I I I I I I I I I I I I I I I I I I I I I I I I I ___ J____ L___ I___.I ___ L___ J____I____1 I I I I I I I I I I I I I I I I I I I I I I I ___J___-I___L___J____I____L___J____I__ I _L _L _L _J _I _I _J I _J _I I I I _1 _J _L _1 .I _L _J _L _L _J _I _L _J _I__ I I L _J _L _L _J _I _L _J _I I I I I I I L{f— Sharp -Crested Rectangular Weir Discharge (cls) ■ Inflow ■ Pdmary ■ Pdmary Post Timmons Type // 24-hr 100 YR Rainfall=9.14" Pond 412: Pipe Stage -Area -Storage Storage 614 --------------- --------------------- ---------- --------- 612 , 610 608 r I I I I r--- ----I r 606 I I _______' ______J I I ______ I I I 604 -------L---------------'________I_______J I I I I ______- r I--- -__J ______- r I 602 _______L_______L_______'________I_______ I I I I J_______JJ_______- I I I I 600 _______L_______'________'________I_______ J_______-_------J_______- p a , m I 578 2,000 2,500 Storage (cubic -feet) Printed 2/4/2020 ❑ Storage Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Hydrograph for Pond 4P: Pipe Storage Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 574.50 0.00 0.50 0.00 0 574.50 0.00 1.00 0.00 0 574.50 0.00 1.50 0.02 10 574.52 0.01 2.00 0.03 24 574.54 0.03 2.50 0.05 36 574.55 0.04 3.00 0.06 46 574.57 0.05 3.50 0.07 56 574.58 0.06 4.00 0.07 64 574.60 0.07 4.50 0.08 72 574.61 0.08 5.00 0.09 81 574.62 0.09 5.50 0.10 91 574.64 0.10 6.00 0.11 100 574.65 0.11 6.50 0.12 109 574.66 0.12 7.00 0.13 117 574.68 0.13 7.50 0.14 126 574.69 0.14 8.00 0.15 134 574.70 0.15 8.50 0.18 153 574.73 0.17 9.00 0.22 182 574.76 0.20 9.50 0.23 198 574.77 0.23 10.00 0.28 220 574.79 0.26 10.50 0.36 272 574.84 0.33 11.00 0.50 357 574.91 0.44 11.50 0.82 551 575.06 0.65 12.00 9.56 4,241 614.00 15.59 12.50 0.81 1,908 575.88 1.34 13.00 0.50 945 575.32 0.93 13.50 0.37 423 574.97 0.53 14.00 0.29 277 574.84 0.33 14.50 0.26 231 574.80 0.27 15.00 0.23 209 574.78 0.24 15.50 0.20 190 574.77 0.22 16.00 0.18 171 574.75 0.19 16.50 0.17 157 574.74 0.17 17.00 0.16 148 574.72 0.16 17.50 0.15 139 574.71 0.15 18.00 0.14 131 574.70 0.14 18.50 0.13 122 574.68 0.13 19.00 0.12 113 574.67 0.12 19.50 0.11 105 574.66 0.11 20.00 0.10 96 574.65 0.10 20.50 0.10 90 574.64 0.10 21.00 0.09 88 574.63 0.10 21.50 0.09 86 574.63 0.09 22.00 0.09 84 574.63 0.09 22.50 0.09 83 574.62 0.09 23.00 0.09 81 574.62 0.09 23.50 0.09 79 574.62 0.09 24.00 0.08 77 574.62 0.08 Post Timmons Elevation Primary (feet) (cfs) 574.50 0.00 574.90 0.42 575.30 0.92 575.70 1.23 576.10 2.34 576.50 3.29 576.90 3.65 577.30 3.97 577.70 4.27 578.10 4.55 578.50 4.82 578.90 5.07 579.30 5.31 579.70 5.54 580.10 5.76 580.50 5.97 580.90 6.17 581.30 6.37 581.70 6.56 582.10 6.75 582.50 6.93 582.90 7.10 583.30 7.28 583.70 7.44 584.10 7.61 584.50 7.77 584.90 7.93 585.30 8.08 585.70 8.23 586.10 8.38 586.50 8.53 586.90 8.67 587.30 8.82 587.70 8.96 588.10 9.09 588.50 9.23 588.90 9.36 589.30 9.49 589.70 9.62 590.10 9.75 590.50 9.88 590.90 10.00 591.30 10.12 591.70 10.25 592.10 10.37 592.50 10.48 592.90 10.60 593.30 10.72 593.70 10.83 594.10 10.95 594.50 11.06 594.90 11.17 Type 11 24-hr 100 YR Rainfall=9.14" Stage -Discharge for Pond 4P: Pipe Storage Elevation Primary (feet) (cfs) 595.30 11.28 595.70 11.39 596.10 11.50 596.50 11.61 596.90 11.71 597.30 11.82 597.70 11.92 598.10 12.03 598.50 12.13 598.90 12.23 599.30 12.33 599.70 12.43 600.10 12.53 600.50 12.63 600.90 12.73 601.30 12.82 601.70 12.92 602.10 13.01 602.50 13.11 602.90 13.20 603.30 13.30 603.70 13.39 604.10 13.48 604.50 13.57 604.90 13.66 605.30 13.75 605.70 13.84 606.10 13.93 606.50 14.02 606.90 14.11 607.30 14.20 607.70 14.28 608.10 14.37 608.50 14.46 608.90 14.54 609.30 14.63 609.70 14.71 610.10 14.80 610.50 14.88 610.90 14.96 611.30 15.05 611.70 15.13 612.10 15.21 612.50 15.29 612.90 15.37 613.30 15.45 613.70 15.53 614.10 15.61 Printed 2/4/2020 Post Timmons Elevation Storage (feet) (cubic -feet) 574.50 0 574.90 336 575.30 908 575.70 1,584 576.10 2,300 576.50 3,004 576.90 3,637 577.30 4,120 577.70 4,241 578.10 4,241 578.50 4,241 578.90 4,241 579.30 4,241 579.70 4,241 580.10 4,241 580.50 4,241 580.90 4,241 581.30 4,241 581.70 4,241 582.10 4,241 582.50 4,241 582.90 4,241 583.30 4,241 583.70 4,241 584.10 4,241 584.50 4,241 584.90 4,241 585.30 4,241 585.70 4,241 586.10 4,241 586.50 4,241 586.90 4,241 587.30 4,241 587.70 4,241 588.10 4,241 588.50 4,241 588.90 4,241 589.30 4,241 589.70 4,241 590.10 4,241 590.50 4,241 590.90 4,241 591.30 4,241 591.70 4,241 592.10 4,241 592.50 4,241 592.90 4,241 593.30 4,241 593.70 4,241 594.10 4,241 594.50 4,241 594.90 4,241 Type 11 24-hr 100 YR Rainfall=9.14" Stage -Area -Storage for Pond 4P: Pipe Storage Elevation Storage (feet) (cubic -feet) 595.30 4,241 595.70 4,241 596.10 4,241 596.50 4,241 596.90 4,241 597.30 4,241 597.70 4,241 598.10 4,241 598.50 4,241 598.90 4,241 599.30 4,241 599.70 4,241 600.10 4,241 600.50 4,241 600.90 4,241 601.30 4,241 601.70 4,241 602.10 4,241 602.50 4,241 602.90 4,241 603.30 4,241 603.70 4,241 604.10 4,241 604.50 4,241 604.90 4,241 605.30 4,241 605.70 4,241 606.10 4,241 606.50 4,241 606.90 4,241 607.30 4,241 607.70 4,241 608.10 4,241 608.50 4,241 608.90 4,241 609.30 4,241 609.70 4,241 610.10 4,241 610.50 4,241 610.90 4,241 611.30 4,241 611.70 4,241 612.10 4,241 612.50 4,241 612.90 4,241 613.30 4,241 613.70 4,241 614.10 4,241 Printed 2/4/2020 Post Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 2/4/2020 Summary for Link 8L: POA3 Inflow Area = 0.830 ac, 90.36% Impervious, Inflow Depth > 8.60" for 100 YR event Inflow = 15.69 cfs @ 12.00 hrs, Volume= 0.595 of Primary = 15.69 cfs @ 12.00 hrs, Volume= 0.595 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link 8L: POA3 Hydrograph � � � ❑ Inflow [I Primary 17 16 ,' 15 es 1 1 +s ss crs i 1 I I 1 i i I 1 cfs Inflow Area=0.830 ac 5 ' _J__!__1_ 1 I 1 14 1 1 1 1 1 13 ' I I I I I 1 1 I I I I I I 1 1 1 1 1 1 12 1 1 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1 1 1 g i 1 1 1 1 1 i 1 1 1 1 1 1 1 3 ,' - '--'--L--L--'-- '--L--L--'-_�- --L--'--L--L--L- '--�--L--L--L- o g 1 1 1 1 1 1 1 1 1 1 1 1 8 1 1 1 1 1 1 1 1 1 1 1 1 i 1 1 -r T r 1 r__i___i_ 1 r 1 1 1 1 1 1 1 , -r-r--r--r__i __r-r--r-_i -_ - _r--�-r--r-- 4 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 2 Time (hours) Post Timmons Type 11 24-hr 100 YR Rainfall=9.14" Hydrograph for Link 8L: POA3 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.25 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.75 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.25 0.00 0.00 0.00 1.50 0.01 0.00 0.01 1.75 0.02 0.00 0.02 2.00 0.03 0.00 0.03 2.25 0.03 0.00 0.03 2.50 0.04 0.00 0.04 2.75 0.04 0.00 0.04 3.00 0.05 0.00 0.05 3.25 0.06 0.00 0.06 3.50 0.06 0.00 0.06 3.75 0.06 0.00 0.06 4.00 0.07 0.00 0.07 4.25 0.07 0.00 0.07 4.50 0.08 0.00 0.08 4.75 0.08 0.00 0.08 5.00 0.09 0.00 0.09 5.25 0.09 0.00 0.09 5.50 0.10 0.00 0.10 5.75 0.10 0.00 0.10 6.00 0.11 0.00 0.11 6.25 0.11 0.00 0.11 6.50 0.12 0.00 0.12 6.75 0.12 0.00 0.12 7.00 0.13 0.00 0.13 7.25 0.13 0.00 0.13 7.50 0.14 0.00 0.14 7.75 0.14 0.00 0.14 8.00 0.15 0.00 0.15 8.25 0.15 0.00 0.15 8.50 0.17 0.00 0.17 8.75 0.19 0.00 0.19 9.00 0.21 0.00 0.21 9.25 0.22 0.00 0.22 9.50 0.23 0.00 0.23 9.75 0.24 0.00 0.24 10.00 0.26 0.00 0.26 10.25 0.29 0.00 0.29 10.50 0.33 0.00 0.33 10.75 0.38 0.00 0.38 11.00 0.45 0.00 0.45 11.25 0.54 0.00 0.54 11.50 0.66 0.00 0.66 11.75 1.21 0.00 1.21 12.00 15.69 0.00 15.69 12.25 3.32 0.00 3.32 12.50 1.35 0.00 1.35 12.75 1.15 0.00 1.15 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 13.00 0.94 0.00 0.94 13.25 0.71 0.00 0.71 13.50 0.54 0.00 0.54 13.75 0.40 0.00 0.40 14.00 0.34 0.00 0.34 14.25 0.30 0.00 0.30 14.50 0.27 0.00 0.27 14.75 0.26 0.00 0.26 15.00 0.24 0.00 0.24 15.25 0.23 0.00 0.23 15.50 0.22 0.00 0.22 15.75 0.20 0.00 0.20 16.00 0.19 0.00 0.19 16.25 0.18 0.00 0.18 16.50 0.17 0.00 0.17 16.75 0.17 0.00 0.17 17.00 0.16 0.00 0.16 17.25 0.16 0.00 0.16 17.50 0.15 0.00 0.15 17.75 0.15 0.00 0.15 18.00 0.14 0.00 0.14 18.25 0.14 0.00 0.14 18.50 0.13 0.00 0.13 18.75 0.13 0.00 0.13 19.00 0.12 0.00 0.12 19.25 0.12 0.00 0.12 19.50 0.12 0.00 0.12 19.75 0.11 0.00 0.11 20.00 0.11 0.00 0.11 20.25 0.10 0.00 0.10 20.50 0.10 0.00 0.10 20.75 0.10 0.00 0.10 21.00 0.10 0.00 0.10 21.25 0.10 0.00 0.10 21.50 0.09 0.00 0.09 21.75 0.09 0.00 0.09 22.00 0.09 0.00 0.09 22.25 0.09 0.00 0.09 22.50 0.09 0.00 0.09 22.75 0.09 0.00 0.09 23.00 0.09 0.00 0.09 23.25 0.09 0.00 0.09 23.50 0.09 0.00 0.09 23.75 0.09 0.00 0.09 24.00 0.09 0.00 0.09 Printed 2/4/2020