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HomeMy WebLinkAboutWPO201500038 Calculations 2015-12-22DUNLORA V COUNTY OF ALBEMARLE, VIRGINIA WPO PLAN DESIGN CALCULATIONS & NARRATIVE JUNE 229 2015 REVISED SEPTEMBER 9, 2015 REVISED NOVEMBER 11, 2015 REVISED DECEMBER 17, 2015 • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS Prepared by: Craig Kotarski, PE Timmons Group 919 2nd Street S.E. Charlottesville, VA 22901 434.327.1688 1� :J CRA -M Vel J.O rARSKT Lac. -ro. 0402049507 r� 121 17115 �`''C�7�x�,L �,�'► 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 5 Virginia Runoff Reduction Method Worksheet Summary 6 Pre -Developed HydroCAD Calculations 7 Post -Developed HydroCAD Calculations Project Narrative: This project is a residential development that includes the addition of 20 single family lots with associated roads, sidewalks, and utilities. Limits of clearing and grading is 4.05 acres. WaterQuality: In the proposed condition there will be 2.54 acres of managed turf, 1.83 acres of impervious cover, and 0.53 acres of forest. Per the Virginia Runoff Reduction Redevelopment Spreadsheet, this will require that 3.15 lbs of phosphorus be removed per year. Phosphorus credits will be purchased. Water Quantity The site consists of two drainage areas. Drainage area 1 drains to the North where it ultimately outfalls into the Dunlora Pond. An underground pipe storage system is being provided to reduce flow back to pre -developed rates. From the storage pipes, the storm sewer system connects to an existing drop inlet on Shepherds Ridge Road. The existing pond drains to Town Branch, eventually making its way eastward to the Rivanna River. Drainage area 2 drains to the south. An underground pipe storage system is being provided to reduce flow back to pre -developed rates. From the storage system the storm sewer system connects to an existing drop inlet located within the Rio Road Right of Way. This structure drains across the road through CATEC, eventually out falling and discharging into Meadow Creek. 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R # § a ° § k / k \ / \ k ` $ 7 § } } Z \ ( ` $ j ` ) ) 2 \ / a / ! { ° e = ! \ ( ® % ! \ ( § § § g 2 § § f { f \ k . ) _ $ § ¥ z _ ° q ` ) A © , § _ Virginia Runoff Reduction Method Worksheet Virginia Runoff Reduction Method New Development Worksheet -- v2.7 Revised April 2013 Site Data Summary Total Rainfall = 43 inches Site Land Cover Summary Site Rv A Soils B Soils I C Soils D Soils Total % of Total Forest (acres) 0.00 0.53 0.00 0.00 0.53 10.82 Turf (acres) 0.00 2.S41 0.00 0.00 2.54 51.84 Impervious (acres) 0.001 1.831 0.00 0.00 1.83 37.35 4.90 100.00 Site Rv 0.46 Post Development Treatment Volume (ft3) 8213 Post Development TP Load (Ib/yr) 5.16 post Development TN Load (Ib yr) 36.91 Total TP Load Reduction Required (Ib/yr) 3.15 Total Runoff Volume Reduction (ft) U Total TP Load Reduction Achieved (Ib yr) Total TN Load Reduction Achieved (lh/V r) 0.00 Adjusted Post Development TP Load (Ib/yr) 5.16 Remaining Phosphorous load Reduction (Lb/Vr) Required 3.15 Summary Print 0s 2s PreDev #1 PreDev #2 Subcat� Reach Link nn Link Drainage Diagram for Pre _ Prepared byTIMMONS GROUP, Printed 11/11/2015 HydroCAD® 9.10 s/n 06538 0 2010 HydroCAD Software Solutions LLC Pre Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 4.290 70 Woods, Good, HSG C (1 S, 2S) 0.110 74 >75% Grass cover, Good, HSG C (1S) 0.260 74 Pasture/grassland/range, Good, HSG C (2S) 0.160 98 Impervious (2S) 0.120 98 Paved parking, HSG C (1 S) 4.940 TOTAL AREA Pre Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD(D 9.10 sin 06538 Q 2010 H droCAD Software Solutions LLC Pa e 3 Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 4.780 HSG C 1 S, 2S 0.000 HSG D 0.160 Other 2S 4.940 TOTAL AREA Pre Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 4 Time span=0.00-24.00 hrs, dt=0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: PreDev #1 Runoff Area=1.610 ac 7.45% Impervious Runoff Depth>1.23" Flow Length=201' Tc=13.2 min CN=72 Runoff=2.67 cfs 0.166 of Subcatchment 2S: PreDev 02 Runoff Area=3.330 ac 4.80% Impervious Runoff Depth>1.23" Flow Length=351' Tc=19.7 min CN=72 Runoff=4.43 cfs 0.342 of Total Runoff Area = 4.940 ac Runoff Volume = 0.508 of Average Runoff Depth =1.23" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD@ 9.10 s/n 06538 © 2010 FI droCAa Software Solutions LLC; Pa c. 5 Summary for Subcatchment IS: PreDev #1 Runoff = 2.67 cfs @ 12.06 hrs, Volume= 0.166 af, Depth> 1.23" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall=3.68" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover. Good. HSG C 1.610 72 Weighted Average 1.490 92.55% Pervious Area 0.120 7.45% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft)(ft/sec) cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 201 Total Subcatchment IS: PreDev #1 Hydrograph 2.67 cfs Type II 24 -hr 2 -Year Rainfall=3.68" Runoff Area=1.610 ac 2 Runoff Volume=0.166 of Runoff Depth>1.23" Flow Length=201' ° Tc=13.2 min u_ 1 CN=72 6 8 10 12 14 16 18 20 22 24 ■ Runoff Pre Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 6 Hydrograph for Subcatchment IS: PreDev #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.02 11.60 1.13 0.03 0.07 12.00 2.44 0.50 2.25 12.40 2.67 0.62 0.58 12.80 2.79 0.69 0.28 13.20 2.88 0.74 0.21 13.60 2.96 0.78 0.17 14.00 3.02 0.82 0.15 14.40 3.07 0.85 0.13 14.80 3.12 0.88 0.12 15.20 3.16 0.91 0.11 15.60 3.20 0.93 0.10 16.00 3.24 0.95 0.09 16.40 3.27 0.97 0.08 16.80 3.30 0.99 0.08 17.20 3.33 1.01 0.08 17.60 3.36 1.03 0.07 18.00 3.39 1.05 0.07 18.40 3.42 1.07 0.07 18.80 3.44 1.08 0.06 19.20 3.46 1.10 0.06 19.60 3.48 1.11 0.06 20.00 3.50 1.12 0.05 20.40 3.52 1.14 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.15 0.05 21.20 3.56 1.16 0.05 21.60 3.58 1.17 0.05 22.00 3.60 1.18 0.05 22.40 3.61 1.20 0.05 22.80 3.63 1.21 0.05 23.20 3.65 1.22 0.05 23.60 3.66 1.23 0.05 24.00 3.68 1.24 0.04 Pre Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 O 2010 H droCAO Software Solutions LLC Pace 7 Summary for Subcatchment 2S: PreDev #2 Runoff = 4.43 cfs @ 12.14 hrs, Volume= 0.342 af, Depth> 1.23" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall=3.68" Area (ac) CN Description 0.160 98 Impervious 0.260 74 Pasture/grassland/range, Good, HSG C 2.910 70 Woods. Good. HSG C 3.330 72 Weighted Average 3.170 95.20% Pervious Area 0.160 4.1 4.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet (ft/ft) (ft/sec) (cfs)_ 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, __ Woodland Kv= 5.0 fps 19.7 351 Total n 3 3 0 z 2 il Subcatchment 2S: PreDev #2 Hydrograph 4.43 cfs Type II 24 -hr 2 -Year Rainfall=3.68" Runoff Area=3.330 ac Runoff Volume=0.342 of Runoff Depth>1.23" Flow Length=351' Tc=19.7 min CN=72 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Pre Type 11 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 2S: PreDev 92 Time Precip. Excess Runoff hours inches inches (Cf S) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.03 11.60 1.13 0.03 0.12 12.00 2.44 0.50 2.65 12.40 2.67 0.62 1.83 12.80 2.79 0.69 0.70 13.20 2.88 0.74 0.47 13.60 2.96 0.78 0.38 14.00 3.02 0.82 0.32 14.40 3.07 0.85 0.27 14.80 3.12 0.88 0.25 15.20 3.16 0.91 0.23 15.60 3.20 0.93 0.21 16.00 3.24 0.95 0.19 16.40 3.27 0.97 0.18 16.80 3.30 0.99 0.17 17.20 3.33 1.01 0.16 17.60 3.36 1.03 0.16 18.00 3.39 1.05 0.15 18.40 3.42 1.07 0.14 18.80 3.44 1.08 0.13 19.20 3.46 1.10 0.13 19.60 3.48 1.11 0.12 20.00 3.50 1.12 0.11 20.40 3.52 1.14 0.11 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.15 0.10 21.20 3.56 1.16 0.10 21.60 3.58 1.17 0.10 22.00 3.60 1.18 0.10 22.40 3.61 1.20 0.10 22.80 3.63 1.21 0.10 23.20 3.65 1.22 0.10 23.60 3.66 1.23 0.09 24.00 3.68 1.24 0.09 Pre Type// 24-hr 10-Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 @2010 HvdroCAD Software Solutions LLC Page 9 Time span=0.00-24.00 hrs, dt=0.02 hrs, 1201 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: PreDev 01 Runoff Area=1.610 ac 7.45% Impervious Runoff Depth>2.63" Flow Length=201' Tc=13.2 min CN=72 Runoff=5.84 cfs 0.353 of Subcatchment 2S: PreDev 92 Runoff Area=3.330 ac 4.80% Impervious Runoff Depth>2.62" Flow Length=351' Tc=19.7 min CN=72 Runoff=9.80 cfs 0.728 of Total Runoff Area = 4.940 ac Runoff Volume = 1.080 of Average Runoff Depth = 2.62" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD « 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC _ - Pa -e 10 Summary for Subcatchment IS: PreDev #1 Runoff = 5.84 cfs @ 12.05 hrs, Volume= 0.353 af, Depth> 2.63" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall=5.56" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover. Good. HSG C 1.610 72 Weighted Average 1.490 0.13 92.55% Pervious Area 0.120 7.45% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ft/sec) cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 201 Total Subcatchment IS: PreDev #1 Hydrograph 15.84 CfS 6 Type II 24 -hr 10 -Year 5 Rainfall=5.56" Runoff Area=1.610 ac N 4 Runoff Volume=0.353 of Runoff Depth>2.63" c 3 Flow Length=201' Tc=13.2 min 2 CN=72 1 1►r!/!!//!//f//f/f/!//�S///!f/ff/f/f/f/fes " .••�rFrrrrririrr6ri� 0 2 4 6 8 10 12 14 16 18 20 22 34� Runoff Pre Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 droCADO 9.10 s/n 06538 0 2010 H droCAD Software Solutions LLC Pae 11 Hydrograph for Subcatchment IS: PreDev #1 Time Precip. Excess Runoff hours inches inches cfs 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.02 10.00 1.01 0.01 0.03 10.40 1.11 0.03 0.05 10.80 1.23 0.05 0.09 11.20 1.40 0.09 0.15 11.60 1.71 0.18 0.31 12.00 3.69 1.24 5.13 12.40 4.03 1.48 1.15 12.80 4.22 1.62 0.54 13.20 4.36 1.72 0.41 13.60 4.47 1.80 0.33 14.00 4.56 1.86 0.27 14.40 4.64 1.92 0.24 14.80 4.71 1.98 0.22 15.20 4.78 2.03 0.20 15.60 4.84 2.07 0.19 16.00 4.89 2.12 0.17 16.40 4.94 2.15 0.16 16.80 4.99 2.19 0.15 17.20 5.04 2.23 0.14 17.60 5.08 2.26 0.14 18.00 5.12 2.29 0.13 18.40 5.16 2.32 0.12 18.80 5.20 2.35 0.12 19.20 5.23 2.38 0.11 19.60 5.26 2.40 0.10 20.00 5.29 2.43 0.10 20.40 5.32 2.45 0.09 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.47 0.09 21.20 5.38 2.49 0.09 21.60 5.41 2.51 0.09 22.00 5.43 2.54 0.09 22.40 5.46 2.56 0.09 22.80 5.48 2.58 0.08 23.20 5.51 2.60 0.08 23.60 5.54 2.62 0.08 24.00 5.56 2.64 0.08 Pre Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD® 9.10 s/n 06538 @2010 Hi droCAD Software Solutions LLC Pagr_ j2 Summary for Subcatchment 2S: PreDev #2 Runoff = 9.80 cfs @ 12.13 hrs, Volume= 0.728 af, Depth> 2.62" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall=5.56" Area (ac) CN Description ` 0.160 98 Impervious 0.260 74 Pasture/grassland/range, Good, HSG C 2.910 70 Woods, Good, HSG C 3.330 72 Weighted Average 3.170 95.20% Pervious Area 0.160 4.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet) (ftlft) (ft/sec) (cfs) 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fr)s 19.7 351 Total 10 9 8 7 6 5 4 3 2 1 0 Subcatchment 2S: PreDev #2 Hydrograph 9.80 CfS Type II 24 -hr 10 -Year Rainfall=5.56" Runoff Area=3.330 ac Runoff Volume=0.728 of Runoff Depth>2.62" Flow Length=351' Tc=19.7 min CN=72 0 2 4 6 8 10 12 14 Time (hours) 16 18 20 22 24 ■ Runoff Pre Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HVdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Pae 13 Hydrograph for Subcatchment 2S: PreDev 02 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.03 10.00 1.01 0.01 0.05 10.40 1.11 0.03 0.09 10.80 1.23 0.05 0.16 11.20 1.40 0.09 0.27 11.60 1.71 0.18 0.53 12.00 3.69 1.24 6.48 12.40 4.03 1.48 3.79 12.80 4.22 1.62 1.36 13.20 4.36 1.72 0.90 13.60 4.47 1.80 0.72 14.00 4.56 1.86 0.59 14.40 4.64 1.92 0.51 14.80 4.71 1.98 0.47 15.20 4.78 2.03 0.43 15.60 4.84 2.07 0.40 16.00 4.89 2.12 0.36 16.40 4.94 2.15 0.33 16.80 4.99 2.19 0.31 17.20 5.04 2.23 0.30 17.60 5.08 2.26 0.28 18.00 5.12 2.29 0.27 18.40 5.16 2.32 0.26 18.80 5.20 2.35 0.24 19.20 5.23 2.38 0.23 19.60 5.26 2.40 0.22 20.00 5.29 2.43 0.20 20.40 5.32 2.45 0.19 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.47 0.19 21.20 5.38 2.49 0.18 21.60 5.41 2.51 0.18 22.00 5.43 2.54 0.18 22.40 5.46 2.56 0.18 22.80 5.48 2.58 0.17 23.20 5.51 2.60 0.17 23.60 5.54 2.62 0.17 24.00 5.56 2.64 0.17 (4S) 2P PostDev #1 to Storage Storage ►ystem #1 System #1 5L -- 3S Outfall PostDev #1 Unrouted ' SubCat� (Reach Link Drainage Diagram for Post Area #1 Prepared by TIMMONS GROUP, Printed 11/11/2015 "� HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Post Area #1 Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.220 70 Woods, Good, HSG C (3S) 0.980 74 >75% Grass cover, Good, HSG C (3S, 4S) 0.530 98 Paved parking, HSG C (3S, 4S) 1.730 TOTAL AREA Post Area #1 Prepared by TIMMONS GROUP H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 1.730 HSG C 3S, 4S 0.000 HSG D 0.000 Other 1.730 TOTAL AREA Post Area #1 Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 4 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 451.50 450.70 30.3 0.0264 0.013 15.0 0.0 0.0 Post Area #1 Type 11 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADQ 9.10 sln 06538 © 2010 N droCAD Software Solutions LLC Pacie 5 Time span=0.00-24.00 hrs, dt=0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 3S: PostDev 91 Unrouted Runoff Area=1.040 ac 21.15% Impervious Runoff Depth>1.63" Flow Length=200' Tc=13.4 min CN=78 Runoff=2.31 cfs 0.141 of Subcatchment 4S: PostDev #1 to Storage Runoff Area=0.690 ac 44.93% Impervious Runoff Depth>2.17" Flow Length=200' Tc=9.4 min CN=85 Runoff=2.34 cfs 0.125 of Pond 213: Storage System #1 Peak Elev=456.02' Storage=0.042 of Inflow=2.34 cfs 0.125 of Outflow=0.63 cfs 0.125 of Link 5L: Outfall Inflow=2.67 cfs 0.266 of Primary=2.67 cfs 0.266 of Total Runoff Area =1.730 ac Runoff Volume = 0.266 of Average Runoff Depth = 1.84" 69.36% Pervious =1.200 ac 30.640/6 Impervious = 0.530 ac Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Paae 6 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 2.31 cfs @ 12.06 hrs, Volume= 0.141 af, Depth> 1.63" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall=3.68" Area (ac) CN Description 0.220 98 Paved parking, HSG C 0.600 74 >75% Grass cover, Good, HSG C 0.220 70 Woods, Good. HSG C 1.040 78 Weighted Average 0.820 78.85% Pervious Area 0.220 Woods: Light underbrush n= 0.400 P2= 3.68" 21.15% Impervious Area Tc Length Slope Velocity Capacity Description _(min) (feet) (ft/ft) (ft/sec)_ cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.4 200 Total Subcatchment 3S: PostDev #1 Unrouted Hydrograph 2.31 ds Type II 24 -hr 2 -Year 2 Rainfall=3.68" Runoff Area=1.040 ac Runoff Volume=0.141 of Runoff Depth>1.63" Flow Length=200' 1 Tc=13.4 min CN=78 ■ til/r//I//////f/J/r/I//I//////J/If///!i r � 6 8 10 12 14 16 18 20 22 24 Runoff Post Area #1 Type ll 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADCD 9.10 s/n 06538 Q 2010 H droCAD Software Solutions LLC _ Page 7 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.01 10.40 0.73 0.01 0.02 10.80 0.81 0.02 0.03 11.20 0.92 0.04 0.05 11.60 1.13 0.09 0.11 12.00 2.44 0.75 2.01 12.40 2.67 0.90 0.48 12.80 2.79 0.98 0.22 13.20 2.88 1.05 0.17 13.60 2.96 1.10 0.14 14.00 3.02 1.14 0.11 14.40 3.07 1.18 0.10 14.80 3.12 1.21 0.09 15.20 3.16 1.25 0.08 15.60 3.20 1.28 0.08 16.00 3.24 1.30 0.07 16.40 3.27 1.33 0.06 16.80 3.30 1.35 0.06 17.20 3.33 1.37 0.06 17.60 3.36 1.39 0.06 18.00 3.39 1.41 0.05 18.40 3.42 1.43 0.05 18.80 3.44 1.45 0.05 19.20 3.46 1.47 0.05 19.60 3.48 1.48 0.04 20.00 3.50 1.50 0.04 20.40 3.52 1.51 0.04 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.53 0.04 21.20 3.56 1.54 0.04 21.60 3.58 1.56 0.04 22.00 3.60 1.57 0.04 22.40 3.61 1.58 0.04 22.80 3.63 1.60 0.03 23.20 3.65 1.61 0.03 23.60 3.66 1.62 0.03 24.00 3.68 1.64 0.03 Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD@ 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 8 Summary for Subcatchment 4S: PostDev #1 to Storage System #1 Runoff = 2.34 cfs @ 12.01 hrs, Volume= 0.125 af, Depth> 2.17" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall=3.68" Area (ac) CN Description 0.310 98 Paved parking, HSG C 0.380 74 >75% Grass cover, Good, HSG C 0.690 85 Weighted Average 0.380 55.07% Pervious Area 0.310 44.93% Impervious Area Tc _ (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity Description (cfs) 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n=0.150 P2=3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4 200 Total Subcatchment 4S: PostDev #1 to Storage System #1 Hydrograph 1 2.34 Cfs Runoff Type II 24 -hr 2 -Year 2 Rainfall=3.68" Runoff Area=0.690 ac .. Runoff Volume=0.125 of Runoff Depth>2.17" Flow Length=200' ° Tc=9.4 min u_ CN=85 ►. //%s%/r/'%%rim/�i�i%fes%����!//r'' -- _..rr.r_.-r-rtf:.�•.�.�r-� . 6 8 10 12 14 16 18 20 22 24 Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Pa e 9 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.01 0.01 8.80 0.52 0.01 0.01 9.20 0.56 0.02 0.02 9.60 0.61 0.03 0.02 10.00 0.67 0.05 0.03 10.40 0.73 0.07 0.04 10.80 0.81 0.10 0.05 11.20 0.92 0.14 0.08 11.60 1.13 0.24 0.16 12.00 2.44 1.13 2.33 12.40 2.67 1.31 0.30 12.80 2.79 1.42 0.17 13.20 2.88 1.49 0.13 13.60 2.96 1.55 0.10 14.00 3.02 1.60 0.09 14.40 3.07 1.65 0.08 14.80 3.12 1.69 0.07 15.20 3.16 1.73 0.06 15.60 3.20 1.76 0.06 16.00 3.24 1.79 0.05 16.40 3.27 1.82 0.05 16.80 3.30 1.85 0.05 17.20 3.33 1.87 0.04 17.60 3.36 1.90 0.04 18.00 3.39 1.92 0.04 18.40 3.42 1.94 0.04 18.80 3.44 1.96 0.04 19.20 3.46 1.98 0.03 19.60 3.48 2.00 0.03 20.00 3.50 2.02 0.03 20.40 3.52 2.04 0.03 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 2.05 0.03 21.20 3.56 2.07 0.03 21.60 3.58 2.08 0.03 22.00 3.60 2.10 0.03 22.40 3.61 2.12 0.03 22.80 3.63 2.13 0.03 23.20 3.65 2.14 0.03 23.60 3.66 2.16 0.03 24.00 3.68 2.17 0.02 Post Area #1 Type// 24-hr 2-Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADe 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Pa a 10 Summary for Pond 2P: Storage System #1 Inflow Area = 0.690 ac, 44.93% Impervious, Inflow Depth > 2.17" for 2 -Year event Inflow = 2.34 cfs @ 12.01 hrs, Volume= 0.125 of Outflow = 0.63 cfs @ 12.19 hrs, Volume= 0.125 af, Atten= 73%, Lag= 11.1 min Primary = 0.63 cfs @ 12.19 hrs, Volume= 0.125 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Peak Elev= 456.02' @ 12.19 hrs Surf.Area= 0.012 ac Storage= 0.042 of Plug -Flow detention time= 38.6 min calculated for 0.125 of (100% of inflow) Center -of -Mass det. time= 38.4 min ( 857.0 - 818.7 ) Volume Invert Avail.Stora a Storage Description #1 451.50' 0.076 of 96.0" D x 66.0'L Pipe Storage S= 0.0050'/' Device Routing Invert Outlet Devices #1 Primary 451.50' 15.0" Round Culvert L= 30.3' Ke= 0.500 Inlet / Outlet Invert= 451.50'/ 450.70' S= 0.02647' Cc= 0.900 n= 0.013 #2 Device 1 451.50' 2.5" Vert. Orifice/Grate C= 0.600 #3 Device 1 455.46' 4.2" Vert. Orifice/Grate C= 0.600 #4 Device 1 458.90' 4.2' long Sharp -Crested Rectangular Weir 2 End Contractions) Primary OutFlow Max=0.63 cfs @ 12.19 hrs HW=456.02' (Free Discharge) Ll =Culvert (Passes 0.63 cfs of 11.66 cfs potential flow) 2=0rificelGrate (Orifice Controls 0.34 cfs @ 10.12 fps) 3=06fice/Grate (Orifice Controls 0.29 cfs @ 2.99 fps) Sharp -Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 I i�droCAD@ 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Pane 11 Pond 2P: Storage System #1 Hydrograph 2 v 3 0 U. 1 e, 459 458 457 w c 456 0 a� 455 w 454 453 452 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #1 Stage -Discharge Sharp -Crested Rectangular Weir Orifice/G rate Culvert + Orifice/Grate 0 2 4 6 8 10 12 Discharge (cfs) Inflow Primary ■ Primary Post Area 01 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Paae 12 459 458 a 457 c 456 0 as 455 u' 454 453 452 Pond 2P: Storage System #1 Stage -Area -Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Storage (acre-feet) Storage Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Page 13 Hydrograph for Pond 2P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre-feet) (feet) (cfs) 0.00 0.00 0.000 451.50 0.00 1.00 0.00 0.000 451.50 0.00 2.00 0.00 0.000 451.50 0.00 3.00 0.00 0.000 451.50 0.00 4.00 0.00 0.000 451.50 0.00 5.00 0.00 0.000 451.50 0.00 6.00 0.00 0.000 451.50 0.00 7.00 0.00 0.000 451.50 0.00 8.00 0.00 0.000 451.53 0.00 9.00 0.01 0.000 451.58 0.01 10.00 0.03 0.000 451.62 0.02 11.00 0.06 0.000 451.74 0.06 12.00 2.33 0.026 454.63 0.29 13.00 0.14 0.032 455.14 0.31 14.00 0.09 0.018 453.92 0.25 15.00 0.07 0.006 452.75 0.18 16.00 0.05 0.000 451.83 0.08 17.00 0.05 0.000 451.69 0.05 18.00 0.04 0.000 451.67 0.04 19.00 0.04 0.000 451.65 0.04 20.00 0.03 0.000 451.63 0.03 21.00 0.03 0.000 451.63 0.03 22.00 0.03 0.000 451.63 0.03 23.00 0.03 0.000 451.62 0.03 24.00 0.02 0.000 451.62 0.02 Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 14 Elevation Primary (feet) WS) 451.50 0.00 451.60 0.02 451.70 0.05 451.80 0.07 451.90 0.09 452.00 0.10 452.10 0.12 452.20 0.13 452.30 0.14 452.40 0.15 452.50 0.16 452.60 0.16 452.70 0.17 452.80 0.18 452.90 0.19 453.00 0.19 453.10 0.20 453.20 0.21 453.30 0.21 453.40 0.22 453.50 0.23 453.60 0.23 453.70 0.24 453.80 0.24 453.90 0.25 454.00 0.25 454.10 0.26 454.20 0.26 454.30 0.27 454.40 0.27 454.50 0.28 454.60 0.28 454.70 0.29 454.80 0.29 454.90 0.30 455.00 0.30 455.10 0.31 455.20 0.31 455.30 0.32 455.40 0.32 455.50 0.33 455.60 0.37 455.70 0.45 455.80 0.53 455.90 0.58 456.00 0.62 456.10 0.66 456.20 0.70 456.30 0.73 456.40 0.76 456.50 0.79 456.60 0.82 Stage -Discharge for Pond 2P: Storage System #1 Elevation Primary (feet) cfs) 456.70 0.85 456.80 0.87 456.90 0.90 457.00 0.92 457.10 0.95 457.20 0.97 457.30 0.99 457.40 1.01 457.50 1.03 457.60 1.05 457.70 1.07 457.80 1.09 457.90 1.11 458.00 1.13 458.10 1.15 458.20 1.16 458.30 1.18 458.40 1.20 458.50 1.22 458.60 1.23 458.70 1.25 458.80 1.26 458.90 1.28 459.00 1.73 459.10 2.53 459.20 3.55 459.30 4.75 459.40 6.10 459.50 7.57 459.60 9.16 459.70 10.85 459.80 12.64 Post Area #1 Type 11 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HydroCAD@79.10 s/n 06538 © 2010 HydroCA❑ Software Solutions LLC Page 15 Elevation Storage (feet) _(acre-feet) 451.50 0.000 451.60 0.000 451.70 0.000 451.80 0.000 451.90 0.001 452.00 0.001 452.10 0.002 452.20 0.002 452.30 0.003 452.40 0.004 452.50 0.004 452.60 0.005 452.70 0.006 452.80 0.007 452.90 0.007 453.00 0.008 453.10 0.009 453.20 0.010 453.30 0.011 453.40 0.012 453.50 0.013 453.60 0.014 453.70 0.015 453.80 0.016 453.90 0.017 454.00 0.019 454.10 0.020 454.20 0.021 454.30 0.022 454.40 0.023 454.50 0.024 454.60 0.025 454.70 0.027 454.80 0.028 454.90 0.029 455.00 0.030 455.10 0.031 455.20 0.032 455.30 0.034 455.40 0.035 455.50 0.036 455.60 0.037 455.70 0.039 455.80 0.040 455.90 0.041 456.00 0.042 456.10 0.043 456.20 0.045 456.30 0.046 456.40 0.047 456.50 0.048 456.60 0.049 Stage -Area -Storage for Pond 2P: Storage System 01 Elevation Storage (feet) (acre-feet) 456.70 0.050 456.80 0.052 456.90 0.053 457.00 0.054 457.10 0.055 457.20 0.056 457.30 0.057 457.40 0.058 457.50 0.060 457.60 0.061 457.70 0.062 457.80 0.063 457.90 0.064 458.00 0.065 458.10 0.066 458.20 0.067 458.30 0.068 458.40 0.068 458.50 0.069 458.60 0.070 458.70 0.071 458.80 0.072 458.90 0.072 459.00 0.073 459.10 0.074 459.20 0.074 459.30 0.075 459.40 0.075 459.50 0.076 459.60 0.076 459.70 0.076 459.80 0.076 Post Area 01 Type 1124 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HydroCAD@ 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 16 Summary for Link 5L: Outfall Inflow Area = 1.730 ac, 30.64% Impervious, Inflow Depth > 1.84" for 2 -Year event Inflow = 2.67 cfs @ 12.09 hrs, Volume= 0.266 of Primary = 2.67 cfs @ 12.09 hrs, Volume= 0.266 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs i!, 3 0 1 W Link 5L: Outfall Hydrograph 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Inflow ■ Primary Post Area #1 Type// 24 -hr 2 -Year Rainfall=3.68" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Pae 17 Hydrograph for Link 5L: Outfall Time Inflow Elevation Primary hours cfs feet cfs) 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.00 0.00 0.00 6.80 0.00 0.00 0.00 7.20 0.00 0.00 0.00 7.60 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.40 0.01 0.00 0.01 8.80 0.01 0.00 0.01 9.20 0.02 0.00 0.02 9.60 0.02 0.00 0.02 10.00 0.03 0.00 0.03 10.40 0.05 0.00 0.05 10.80 0.08 0.00 0.08 11.20 0.12 0.00 0.12 11.60 0.22 0.00 0.22 12.00 2.29 0.00 2.29 12.40 0.99 0.00 0.99 12.80 0.54 0.00 0.54 13.20 0.46 0.00 0.46 13.60 0.41 0.00 0.41 14.00 0.36 0.00 0.36 14.40 0.32 0.00 0.32 14.80 0.28 0.00 0.28 15.20 0.24 0.00 0.24 15.60 0.20 0.00 0.20 16.00 0.15 0.00 0.15 16.40 0.11 0.00 0.11 16.80 0.11 0.00 0.11 17.20 0.10 0.00 0.10 17.60 0.10 0.00 0.10 18.00 0.09 0.00 0.09 18.40 0.09 0.00 0.09 18.80 0.08 0.00 0.08 19.20 0.08 0.00 0.08 19.60 0.07 0.00 0.07 20.00 0.07 0.00 0.07 20.40 0.07 0.00 0.07 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 20.80 0.07 0.00 0.07 21.20 0.06 0.00 0.06 21.60 0.06 0.00 0.06 22.00 0.06 0.00 0.06 22.40 0.06 0.00 0.06 22.80 0.06 0.00 0.06 23.20 0.06 0.00 0.06 23.60 0.06 0.00 0.06 24.00 0.06 0.00 0.06 Post Area #1 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 1$ Time span=0.00-24.00 hrs, dt=0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area=1.040 ac 21.15% Impervious Runoff Depth>3.18" Flow Length=200' Tc=13.4 min CN=78 Runoff=4.52 cfs 0.276 of Subcatchment 4S: PostDev #1 to Storage Runoff Area=0.690 ac 44.93% Impervious Runoff Depth>3.88" Flow Length=200' Tc=9.4 min CN=85 Runoff=4.09 cfs 0.223 of Pond 2P: Storage System #1 Peak Elev=459.01' Storage=0.073 of Inflow=4.09 cfs 0.223 of Outflow=1.82 cfs 0.223 of Link 5L: Outfall Inflow=5.66 cfs 0.499 of Primary=5.66 cfs 0.499 of Total Runoff Area =1.730 ac Runoff Volume = 0.499 of Average Runoff Depth = 3.46" 69.36% Pervious = 1.200 ac 30.64% Impervious = 0.530 ac Post Area 91 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 19 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 4.52 cfs @ 12.05 hrs, Volume= 0.276 af, Depth> 3.18" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall=5.56" Area (ac) CN Description 0.220 98 Paved parking, HSG C 0.600 74 >75% Grass cover, Good, HSG C 0.220 70 Woods, Good, HSG C 1.040 78 Weighted Average 0.820 78.85% Pervious Area 0.220 21.15% Impervious Area Tc Length Slope Velocity Capacity Description _(min) feet ft/ft ft/sec) (cfs) 12.5 100 0.0650 0.13 Sheet Flow, f Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 f2s 13.4 200 Total Subcatchment 3S: PostDev #1 Unrouted Hydrograph s 4.52 Cfs Runoff Type 1124 -hr 10 -Year 4 Rainfall=5.56" Runoff Area=1.040 ac ., Runoff Volume=0.276 of 3 Runoff Depth>3.18" Flow Length=200' ii 2 Tc=13.4 min CN=78 1 r •. �rrrrrr�rrrrrrrrrirrirrirrErrr �r�r � - ---- �irrr� 6 8 10 12 14 16 18 20 22 24 Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADC) 9.10 sln 06538 0 2010 HydroCAD Software Solutions LLC Pa a 2D Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.01 8.40 0.72 0.01 0.01 8.80 0.78 0.02 0.02 9.20 0.85 0.03 0.03 9.60 0.92 0.04 0.04 10.00 1.01 0.06 0.05 10.40 1.11 0.09 0.07 10.80 1.23 0.13 0.10 11.20 1.40 0.19 0.16 11.60 1.71 0.33 0.30 12.00 3.69 1.64 4.03 12.40 4.03 1.91 0.87 12.80 4.22 2.06 0.40 13.20 4.36 2.18 0.30 13.60 4.47 2.27 0.24 14.00 4.56 2.34 0.20 14.40 4.64 2.41 0.17 14.80 4.71 2.47 0.16 15.20 4.78 2.52 0.15 15.60 4.84 2.58 0.13 16.00 4.89 2.62 0.12 16.40 4.94 2.66 0.11 16.80 4.99 2.70 0.11 17.20 5.04 2.74 0.10 17.60 5.08 2.78 0.10 18.00 5.12 2.81 0.09 18.40 5.16 2.85 0.09 18.80 5.20 2.88 0.08 19.20 5.23 2.91 0.08 19.60 5.26 2.94 0.07 20.00 5.29 2.96 0.07 20.40 5.32 2.99 0.06 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 3.01 0.06 21.20 5.38 3.04 0.06 21.60 5.41 3.06 0.06 22.00 5.43 3.08 0.06 22.40 5.46 3.11 0.06 22.80 5.48 3.13 0.06 23.20 5.51 3.15 0.06 23.60 5.54 3.17 0.06 24.00 5.56 3.19 0.06 Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Paae 21 Summary for Subcatchment 4S: PostDev #1 to Storage System #1 Runoff = 4.09 cfs @ 12.01 hrs, Volume= 0.223 af, Depth> 3.88" Runoff by SCS TR -20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall=5.56" Area (ac) CN Descriotion 0.310 98 Paved parking, HSG C 0.380 74 >75% Grass cover, Good, HSG C 0.690 85 Weighted Average 0.380 55.07% Pervious Area 0.310 44.93% Impervious Area Tc Length Slope Velocity (min) (feet) (ft/ft)_ (ft/sec) 9.1 100 0.0200 0.18 0.3 100 0.0750 5.56 9.4 4 3 w 0 2 U. 1 0 0 200 Total Capacity Description (cfs) Sheet Flow, Grass: Short n=0.150 P2=3.68" Shallow Concentrated Flow, Paved Kv= 20.3 fos Subcatchment 4S: PostDev #1 to Storage System #1 Hydrograph � 4.09 cfs Type II 24 -hr 10 -Year Rainfall=5.56" Runoff Area=0.690 ac Runoff Volume=0.223 of Runoff Depth>3.88" Flow Length=200' Tc=9.4 min CN=85 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Post Area #1 Type 1124 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 22 Hydrograph for Subcatchment 4S: PostDev 91 to Storage System 91 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.01 6.40 0.49 0.01 0.01 6.80 0.53 0.02 0.01 7.20 0.57 0.02 0.02 7.60 0.62 0.03 0.02 8.00 0.67 0.05 0.02 8.40 0.72 0.06 0.03 8.80 0.78 0.08 0.04 9.20 0.85 0.11 0.05 9.60 0.92 0.14 0.05 10.00 1.01 0.18 0.07 10.40 1.11 0.23 0.09 10.80 1.23 0.29 0.12 11.20 1.40 0.39 0.18 11.60 1.71 0.59 0.33 12.00 3.69 2.18 4.08 12.40 4.03 2.49 0.51 12.80 4.22 2.65 0.28 13.20 4.36 2.78 0.21 13.60 4.47 2.88 0.17 14.00 4.56 2.96 0.14 14.40 4.64 3.04 0.12 14.80 4.71 3.10 0.11 15.20 4.78 3.16 0.11 15.60 4.84 3.22 0.10 16.00 4.89 3.27 0.09 16.40 4.94 3.32 0.08 16.80 4.99 3.36 0.08 17.20 5.04 3.40 0.07 17.60 5.08 3.44 0.07 18.00 5.12 3.48 0.07 18.40 5.16 3.52 0.06 18.80 5.20 3.55 0.06 19.20 5.23 3.58 0.06 19.60 5.26 3.61 0.05 20.00 5.29 3.64 0.05 20.40 5.32 3.67 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 3.69 0.05 21.20 5.38 3.72 0.04 21.60 5.41 3.74 0.04 22.00 5.43 3.77 0.04 22.40 5.46 3.79 0.04 22.80 5.48 3.82 0.04 23.20 5.51 3.84 0.04 23.60 5.54 3.87 0.04 24.00 5.56 3.89 0.04 Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 © 2010 li droCAD Software Solutions LLC Page 23 Summary for Pond 2P: Storage System #1 Inflow Area = 0.690 ac, 44.93% Impervious, Inflow Depth > 3.88" for 10 -Year event Inflow = 4.09 cfs @ 12.01 hrs, Volume= 0.223 of Outflow = 1.82 cfs @ 12.14 hrs, Volume= 0.223 af, Atten= 56%, Lag= 8.0 min Primary = 1.82 cfs @ 12.14 hrs, Volume= 0.223 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs Peak Elev= 459.01' @ 12.14 hrs Surf.Area= 0.007 ac Storage= 0.073 of Plug -Flow detention time= 36.9 min calculated for 0.223 of (100% of inflow) Center -of -Mass det. time= 36.6 min ( 838.9 - 802.2 ) Volume Invert Avail.Stora a Storage Description #1 451.50' 0.076 of 96.0" D x 66.01 Pipe Storage S= 0.00507' Device Routing Invert Outlet Devices #1 Primary 451.50' 15.0" Round Culvert L= 30.3' Ke= 0.500 Inlet / Outlet Invert= 451.50'/ 450.70' S= 0.0264'/' Cc= 0.900 n= 0.013 #2 Device 1 451.50' 2.5" Vert. Orifice/Grate C= 0.600 #3 Device 1 455.46' 4.2" Vert. Orifice/Grate C= 0.600 #4 Device 1 458.90' 4.2' long Sharp -Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=1.80 cfs @ 12.14 hrs HW=459.01' (Free Discharge) t--1 =Culvert (Passes 1.80 cfs of 15.50 cfs potential flow) 1:3-=Sharp-Crested Orifice/Grate (Orifice Controls 0.45 cfs @ 13.10 fps) Orifice/Grate (Orifice Controls 0.85 cfs @ 8.85 fps) Rectangular Weir (Weir Controls 0.50 cfs @ 1.09 fps) Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCAD® 9.10 s/n 06538 02010 H droCAD Software Solutions LLC Pa 2 24 Pond 2P: Storage System #1 Hydrograph 4 3 v 0 2 LL 1 we EMS 458 a 457 w v c 456 0 as 455 "' 454 453 452 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #1 Stage -Discharge Sharp -Crested Rectangular Weir Orifice/Grate Culvert + Orifice/Grate 0 2 4 6 8 10 12 Discharge (cfs) Inflow Primary Primary Post Area 01 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 H droCADO 9.10 s/n 06538 a 2010 H droCAD Software Solutions LLC Page 25 459 458 d 457 w c 456 0 as 455 w 454 453 EW Pond 2P: Storage System #1 Stage -Area -Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Storage (acre-feet) ■ Storage Post Area #1 Type 11 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HydroCADO 9.10 s!n 06538 © 2010 HydroCAD Software Solutions LLC Page 26 Hydrograph for Pond 2P: Storage System #1 Time Inflow Storage Elevation Primary hours) (Cfs) (acre-feet feet cfs 0.00 0.00 0.000 451.50 0.00 1.00 0.00 0.000 451.50 0.00 2.00 0.00 0.000 451.50 0.00 3.00 0.00 0.000 451.50 0.00 4.00 0.00 0.000 451.50 0.00 5.00 0.00 0.000 451.50 0.00 6.00 0.01 0.000 451.54 0.01 7.00 0.01 0.000 451.59 0.01 8.00 0.02 0.000 451.61 0.02 9.00 0.04 0.000 451.67 0.04 10.00 0.07 0.000 451.75 0.06 11.00 0.14 0.001 452.06 0.11 12.00 4.08 0.052 456.80 0.67 13.00 0.24 0.039 455.77 0.50 14.00 0.14 0.027 454.77 0.29 15.00 0.11 0.015 453.72 0.24 16.00 0.09 0.006 452.76 0.18 17.00 0.07 0.001 452.02 0.11 18.00 0.07 0.000 451.78 0.07 19.00 0.06 0.000 451.73 0.06 20.00 0.05 0.000 451.70 0.05 21.00 0.05 0.000 451.68 0.05 22.00 0.04 0.000 451.68 0.04 23.00 0.04 0.000 451.67 0.04 24.00 0.04 0.000 451.67 0.04 Post Area #1 Type // 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 27 Elevation Primary (feet) (cfs) 451.50 0.00 451.60 0.02 451.70 0.05 451.80 0.07 451.90 0.09 452.00 0.10 452.10 0.12 452.20 0.13 452.30 0.14 452.40 0.15 452.50 0.16 452.60 0.16 452.70 0.17 452.80 0.18 452.90 0.19 453.00 0.19 453.10 0.20 453.20 0.21 453.30 0.21 453.40 0.22 453.50 0.23 453.60 0.23 453.70 0.24 453.80 0.24 453.90 0.25 454.00 0.25 454.10 0.26 454.20 0.26 454.30 0.27 454.40 0.27 454.50 0.28 454.60 0.28 454.70 0.29 454.80 0.29 454.90 0.30 455.00 0.30 455.10 0.31 455.20 0.31 455.30 0.32 455.40 0.32 455.50 0.33 455.60 0.37 455.70 0.45 455.80 0.53 455.90 0.58 456.00 0.62 456.10 0.66 456.20 0.70 456.30 0.73 456.40 0.76 456.50 0.79 456.60 0.82 Stage -Discharge for Pond 2P: Storage System #1 Elevation Primary (feet) (cfs) 456.70 0.85 456.80 0.87 456.90 0.90 457.00 0.92 457.10 0.95 457.20 0.97 457.30 0.99 457.40 1.01 457.50 1.03 457.60 1.05 457.70 1.07 457.80 1.09 457.90 1.11 458.00 1.13 458.10 1.15 458.20 1.16 458.30 1.18 458.40 1.20 458.50 1.22 458.60 1.23 458.70 1.25 458.80 1.26 458.90 1.28 459.00 1.73 459.10 2.53 459.20 3.55 459.30 4.75 459.40 6.10 459.50 7.57 459.60 9.16 459.70 10.85 459.80 12.64 Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC PMft 28 Stage -Area -Storage for Pond 2P: Storage System #1 Elevation Storage (feet) (acre-feet) 451.50 0.000 451.60 0.000 451.70 0.000 451.80 0.000 451.90 0.001 452.00 0.001 452.10 0.002 452.20 0.002 452.30 0.003 452.40 0.004 452.50 0.004 452.60 0.005 452.70 0.006 452.80 0.007 452.90 0.007 453.00 0.008 453.10 0.009 453.20 0.010 453.30 0.011 453.40 0.012 453.50 0.013 453.60 0.014 453.70 0.015 453.80 0.016 453.90 0.017 454.00 0.019 454.10 0.020 454.20 0.021 454.30 0.022 454.40 0.023 454.50 0.024 454.60 0.025 454.70 0.027 454.80 0.028 454.90 0.029 455.00 0.030 455.10 0.031 455.20 0.032 455.30 0.034 455.40 0.035 455.50 0.036 455.60 0.037 455.70 0.039 455.80 0.040 455.90 0.041 456.00 0.042 456.10 0.043 456.20 0.045 456.30 0.046 456.40 0.047 456.50 0.048 456.60 0.049 Elevation Storage feet acre-feet 456.70 0.050 456.80 0.052 456.90 0.053 457.00 0.054 457.10 0.055 457.20 0.056 457.30 0.057 457.40 0.058 457.50 0.060 457.60 0.061 457.70 0.062 457.80 0.063 457.90 0.064 458.00 0.065 458.10 0.066 458.20 0.067 458.30 0.068 458.40 0.068 458.50 0.069 458.60 0.070 458.70 0.071 458.80 0.072 458.90 0.072 459.00 0.073 459.10 0.074 459.20 0.074 459.30 0.075 459.40 0.075 459.50 0.076 459.60 0.076 459.70 0.076 459.80 0.076 Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC _ Page 29 Summary for Link 5L: Outfall Inflow Area = 1.730 ac, 30.64% Impervious, Inflow Depth > 3.46" for 10 -Year event Inflow = 5.66 cfs @ 12.06 hrs, Volume= 0.499 of Primary = 5.66 cfs @ 12.06 hrs, Volume= 0.499 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.02 hrs 6 5 4 v 0 3 2 1 0 0 Link 5L: Outfall Hydrograph 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Inflow ■ Primary Post Area #1 Type// 24 -hr 10 -Year Rainfall=5.56" Prepared by TIMMONS GROUP Printed 11/11/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 30 Hydrograph for Link 5L: Outfall Time Inflow Elevation Primary (hours) (Cfs) (feet) (Cfs) 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.01 0.00 0.01 6.40 0.01 0.00 0.01 6.80 0.01 0.00 0.01 7.20 0.02 0.00 0.02 7.60 0.02 0.00 0.02 8.00 0.03 0.00 0.03 8.40 0.04 0.00 0.04 8.80 0.06 0.00 0.06 9.20 0.07 0.00 0.07 9.60 0.09 0.00 0.09 10.00 0.11 0.00 0.11 10.40 0.15 0.00 0.15 10.80 0.20 0.00 0.20 11.20 0.28 0.00 0.28 11.60 0.46 0.00 0.46 12.00 4.90 0.00 4.90 12.40 1.98 0.00 1.98 12.80 1.12 0.00 1.12 13.20 0.63 0.00 0.63 13.60 0.55 0.00 0.55 14.00 0.49 0.00 0.49 14.40 0.44 0.00 0.44 14.80 0.41 0.00 0.41 15.20 0.37 0.00 0.37 15.60 0.34 0.00 0.34 16.00 0.30 0.00 0.30 16.40 0.26 0.00 0.26 16.80 0.23 0.00 0.23 17.20 0.19 0.00 0.19 17.60 0.17 0.00 0.17 18.00 0.16 0.00 0.16 18.40 0.15 0.00 0.15 18.80 0.14 0.00 0.14 19.20 0.13 0.00 0.13 19.60 0.13 0.00 0.13 20.00 0.12 0.00 0.12 20.40 0.11 0.00 0.11 Time Inflow Elevation Primary (hours) (Cfs) (feet) (Cfs) 20.80 0.11 0.00 0.11 21.20 0.11 0.00 0.11 21.60 0.11 0.00 0.11 22.00 0.10 0.00 0.10 22.40 0.10 0.00 0.10 22.80 0.10 0.00 0.10 23.20 0.10 0.00 0.10 23.60 0.10 0.00 0.10 24.00 0.10 0.00 0.10 Cis PostDev #2 Unrouted 3L A2P 3S Outfall Storage System #2 PostDev #2 to Storage System #2 �Subcat Reac]Routing Diagram for Post Area #2 Prepared by TIMMONS GROUP, Printed 12/17/2015 �� HydroCAD®10.00 s/n 06538 0 2013 HydroCAD Software Solutions LLC Post Area #2 Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 1.560 74 >75% Grass cover, Good, HSG C (1 S, 3S) 0.280 98 Impervious (1S) 1.020 98 Paved parking, HSG B (3S) 0.040 55 Woods, Good, HSG B (3S) 0.270 70 Woods, Good, HSG C (1S) 3.170 83 TOTAL AREA Post Area #2 Prepared by TIMMONS GROUP Printed 12/17/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 1.060 HSG B 3S 1.830 HSG C 1 S, 3S 0.000 HSG D 0.280 Other is 3.170 TOTAL AREA DUNLORA V COUNTY OF ALBEMARLE, VIRGINIA WPO PLAN DESIGN CALCULATIONS & NARRATIVE JUNE 229 2015 REVISED SEPTEMBER 9, 2015 . •' 0 0 s • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Craig Kotarski, PE Timmons Group 919 2nd Street S. E. Charlottesville, VA 22901 434.327.1688 � �� � Q CxATG W ] KOTARSKT Lic. No. 0402048507 %fWAL Table of Contents Section Title Project Narrative 2 LD 229 — Storm Sewer Design Computations LD 204 — Storm Inlet Design Computations 4 Pre - Developed HydroCAD Calculations 5 Post - Developed HydroCAD Calculations Project Narrative: This project is a residential development that includes the addition of 20 single family lots with associated roads, sidewalks, and utilities. Limits of clearing and grading is 4.05 acres. Water Quality In the proposed condition there will be 2.58 acres of managed turf, 1.70 acres of impervious cover, and 0.68 acres of forest. Per the Virginia Runoff Reduction Redevelopment Spreadsheet, this will required that 2.87 lbs of phosphorus be removed per year. Phosphorus credits will be purchased. Water Quantity The site consists of two drainage areas. Drainage area 1 drains to the North where it ultimately outfalls into the Dunlora Pond. An underground pipe storage system is being provided to reduce flow back to pre - developed rates. From the storage pipes, the storm sewer system connects to an existing drop inlet on Shepherds Ridge Road. The existing pond drains to Town Branch, eventually making its way eastward to the Rivanna River. Drainage area 2 drains to the south. An underground pipe storage system is being provided to reduce flow back to pre - developed rates. From the storage system the storm sewer system connects to an existing drop inlet located within the Rio Road Right of Way. This structure drains across the road through CATEC, eventually out falling and discharging into Meadow Creek. 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ZW � U N W ❑U N Z O 6 7 O U LLIW _Z R' Q i K O y g 0 J 0 O W 7 ce W rL 0 z } m 0 0 Z MIN I milli IIE11111111111111111111111111 11111111111111111111111111 n � 11110111111 W rL 0 z } m 0 0 Z LL W = o Wi 2L U� W7 O[ H 2 O Q IL f O u W 2 W 0 N 0 N J O LL W H 1' W 0) Z } in FT H Ul Z IIIIIIIIIIIIIII MINIM MEN 01111111111111111 1 IIIIIIIINIIIIIIIIIIIIIIII 11111 111111111111 Mill milli IIIIIIII 11111 MINNIE 1111111111 I HIM 11111 Ills loll 111111 111111111 11 oil 1111111111111 W 0) Z } in FT H Ul Z 1S PreDev #1 5ubcat� Reach on Link - \-- 2S PreDev #2 Pre Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Pape 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 4.290 70 Woods, Good, HSG C (1S, 2S) 0.110 74 >75% Grass cover, Good, HSG C (1 S) 0.260 74 Pasture /grassland /range, Good, HSG C (2S) 0.160 98 Impervious (2S) 0.120 98 Paved parking, HSG C (1S) 4.940 TOTAL AREA Pre Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 4.780 HSG C 1 S, 2S 0.000 HSG D 0.160 Other 2S 4.940 TOTAL AREA Pre Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 4 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PreDev #1 Runoff Area =1.610 ac 7.45% Impervious Runoff Depth >1.23" Flow Length =201' Tc =13.2 min CN =72 Runoff =2.67 cfs 0.166 of Subcatchment 2S: PreDev #2 Runoff Area =3.330 ac 4.80% Impervious Runoff Depth >1.23" Flow Length =351' Tc =19.7 min CN =72 Runoff =4.43 cfs 0.342 of Total Runoff Area= 4.940 ac Runoff Volume= 0.508 of Average Runoff Depth= 1.23" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCADO 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Pace 5 Summary for Subcatchment 1 S: PreDev #1 Runoff = 2.67 cfs @ 12.06 hrs, Volume= 0.166 af, Depth> 1.23" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover, Good, HSG C 1.610 72 Weighted Average 1.490 92.55% Pervious Area 0.120 0.7 101 7.45% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (fUft) (ft/sec) (cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 201 Total Subcatchment 1S: PreDev #1 Hydrograph 1 2.67 cfs Type II 24 -hr 2 -Year Rainfall= 3.68" Runoff Area =1.610 ac 2 Runoff Volume =0.166 of Runoff Depth >1.23" 3 Flow Length =201' 0 Tc =13.2 min u_ 1 CN =72 1 ►. i�rriiriri�rrirrr�rrtritrr�ir�ir��rr�rri - - - - - - ..� 0 2 4 • 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Pre Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Paae 6 Hydrograph for Subcatchment 1 S: PreDev #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.02 11.60 1.13 0.03 0.07 12.00 2.44 0.50 2.25 12.40 2.67 0.62 0.58 12.80 2.79 0.69 0.28 13.20 2.88 0.74 0.21 13.60 2.96 0.78 0.17 14.00 3.02 0.82 0.15 14.40 3.07 0.85 0.13 14.80 3.12 0.88 0.12 15.20 3.16 0.91 0.11 15.60 3.20 0.93 0.10 16.00 3.24 0.95 0.09 16.40 3.27 0.97 0.08 16.80 3.30 0.99 0.08 17.20 3.33 1.01 0.08 17.60 3.36 1.03 0.07 18.00 3.39 1.05 0.07 18.40 3.42 1.07 0.07 18.80 3.44 1.08 0.06 19.20 3.46 1.10 0.06 19.60 3.48 1.11 0.06 20.00 3.50 1.12 0.05 20.40 3.52 1.14 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.15 0.05 21.20 3.56 1.16 0.05 21.60 3.58 1.17 0.05 22.00 3.60 1.18 0.05 22.40 3.61 1.20 0.05 22.80 3.63 1.21 0.05 23.20 3.65 1.22 0.05 23.60 3.66 1.23 0.05 24.00 3.68 1.24 0.04 Pre Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Paoe 7 Summary for Subcatchment 2S: PreDev #2 Runoff = 4.43 cfs @ 12.14 hrs, Volume= 0.342 af, Depth> 1.23" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.160 98 Impervious 0.260 74 Pasture /grassland /range, Good, HSG C 2.910 70 Woods, Good, HSG C 3.330 72 Weighted Average 3.170 95.20% Pervious Area 0.160 4.80% Impervious Area Tc Length Slope Velocity Capacity Description min feet (ft/ft) (fUsec) (cfs) 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.7 351 Total 4 3 v 3 0 2 1 0 0 Subcatchment 2S: PreDev #2 Hydrograph 4.43 cfs Type II 24 -hr 2 -Year Rainfall= 3.68" Runoff Area =3.330 ac Runoff Volume =0.342 of Runoff Depth >1.23" Flow Length =351' Tc =19.7 min CN =72 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Pre Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 2S: PreDev #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.03 11.60 1.13 0.03 0.12 12.00 2.44 0.50 2.65 12.40 2.67 0.62 1.83 12.80 2.79 0.69 0.70 13.20 2.88 0.74 0.47 13.60 2.96 0.78 0.38 14.00 3.02 0.82 0.32 14.40 3.07 0.85 0.27 14.80 3.12 0.88 0.25 15.20 3.16 0.91 0.23 15.60 3.20 0.93 0.21 16.00 3.24 0.95 0.19 16.40 3.27 0.97 0.18 16.80 3.30 0.99 0.17 17.20 3.33 1.01 0.16 17.60 3.36 1.03 0.16 18.00 3.39 1.05 0.15 18.40 3.42 1.07 0.14 18.80 3.44 1.08 0.13 19.20 3.46 1.10 0.13 19.60 3.48 1.11 0.12 20.00 3.50 1.12 0.11 20.40 3.52 1.14 0.11 Time Precip. Excess Runoff hours (inches) [inches] {cfs} 20.80 3.54 1.15 0.10 21.20 3.56 1.16 0.10 21.60 3.58 1.17 0.10 22.00 3.60 1.18 0.10 22.40 3.61 1.20 0.10 22.80 3.63 1.21 0.10 23.20 3.65 1.22 0.10 23.60 3.66 1.23 0.09 24.00 3.68 1.24 0.09 Pre Type// 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Paae 9 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PreDev #1 Runoff Area =1.610 ac 7.45% Impervious Runoff Depth >2.63" Flow Length =201' Tc =13.2 min CN =72 Runoff =5.84 cfs 0.353 of Subcatchment 2S: PreDev #2 Runoff Area =3.330 ac 4.80% Impervious Runoff Depth >2.62" Flow Length =351' Tc =19.7 min CN =72 Runoff =9.80 cfs 0.728 of Total Runoff Area = 4.940 ac Runoff Volume =1.080 of Average Runoff Depth = 2.62" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Pane 10 Summary for Subcatchment 1S: PreDev #1 Runoff = 5.84 cfs @ 12.05 hrs, Volume= 0.353 af, Depth> 2.63" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover. Good, HSG C 1.610 72 Weighted Average 1.490 92.55% Pervious Area 0.120 0.7 101 7.45% Impervious Area Tc Length Slope Velocity Capacity Description min feet (ft/ft ) (ft/sec ) (cfs 12.5 100 0.0650 0.13 Sheet Flow, v Runoff Depth >2.63" Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Tc =13.2 min M 2 Short Grass Pasture Kv= 7.0 fns 13.2 201 Total Subcatchment 1 S: PreDev #1 Hydrograph 1 5.84 ds l 6 Type II 24 -hr 10 -Year Rainfall = 5.56" 5 Runoff Area =1.610 ac N 4 Runoff Volume =0.353 of v Runoff Depth >2.63" 3 3 Flow Length =201' 0 Tc =13.2 min M 2 CN =72 1 0 2 4 • 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Pre Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 HvdroCAD Software Solutions LLC Page 11 Hydrograph for Subcatchment 1 S: PreDev #1 Time Precip. Excess Runoff hours] {inches} (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.02 10.00 1.01 0.01 0.03 10.40 1.11 0.03 0.05 10.80 1.23 0.05 0.09 11.20 1.40 0.09 0.15 11.60 1.71 0.18 0.31 12.00 3.69 1.24 5.13 12.40 4.03 1.48 1.15 12.80 4.22 1.62 0.54 13.20 4.36 1.72 0.41 13.60 4.47 1.80 0.33 14.00 4.56 1.86 0.27 14.40 4.64 1.92 0.24 14.80 4.71 1.98 0.22 15.20 4.78 2.03 0.20 15.60 4.84 2.07 0.19 16.00 4.89 2.12 0.17 16.40 4.94 2.15 0.16 16.80 4.99 2.19 0.15 17.20 5.04 2.23 0.14 17.60 5.08 2.26 0.14 18.00 5.12 2.29 0.13 18.40 5.16 2.32 0.12 18.80 5.20 2.35 0.12 19.20 5.23 2.38 0.11 19.60 5.26 2.40 0.10 20.00 5.29 2.43 0.10 20.40 5.32 2.45 0.09 Time Precip. Excess Runoff hours inches inches cfs 20.80 5.35 2.47 0.09 21.20 5.38 2.49 0.09 21.60 5.41 2.51 0.09 22.00 5.43 2.54 0.09 22.40 5.46 2.56 0.09 22.80 5.48 2.58 0.08 23.20 5.51 2.60 0.08 23.60 5.54 2.62 0.08 24.00 5.56 2.64 0.08 Pre Type// 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCADO 9.10 s/n 06538 © 2010 H droCAD SOUare Solutions LLC Pa a 12 Summary for Subcatchment 2S: PreDev #2 Runoff = 9.80 cfs @ 12.13 hrs, Volume= 0.728 af, Depth> 2.62" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.160 98 Impervious 0.260 74 Pasture /grassland /range, Good, HSG C 2.910 70 Woods, Good, HSG C 3.330 72 Weighted Average 3.170 95.20% Pervious Area 0.160 4.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet (ft/ft) (ft/sec ) (cfs 15.6 100 0.0375 0.11 Sheet Flow, 0 4 Tc =19.7 min CN =72 Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.7 351 Total Subcatchment 2S: PreDev #2 ►I.. .--/ I • 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Hydrograph 9.80 cfs 10 _ Type II 24-hr 10 -Year 9._: Rainfall = 5.56" 8 Runoff Area =3.330 ac 7 Runoff Volume =0.728 of 6 _ Runoff Depth >2.62" c 5 Flow Length =351' 0 4 Tc =19.7 min CN =72 3 ►I.. .--/ I • 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Pre Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Page 13 Hydrograph for Subcatchment 2S: PreDev #2 Time Precip. Excess Runoff hours (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.03 10.00 1.01 0.01 0.05 10.40 1.11 0.03 0.09 10.80 1.23 0.05 0.16 11.20 1.40 0.09 0.27 11.60 1.71 0.18 0.53 12.00 3.69 1.24 6.48 12.40 4.03 1.48 3.79 12.80 4.22 1.62 1.36 13.20 4.36 1.72 0.90 13.60 4.47 1.80 0.72 14.00 4.56 1.86 0.59 14.40 4.64 1.92 0.51 14.80 4.71 1.98 0.47 15.20 4.78 2.03 0.43 15.60 4.84 2.07 0.40 16.00 4.89 2.12 0.36 16.40 4.94 2.15 0.33 16.80 4.99 2.19 0.31 17.20 5.04 2.23 0.30 17.60 5.08 2.26 0.28 18.00 5.12 2.29 0.27 18.40 5.16 2.32 0.26 18.80 5.20 2.35 0.24 19.20 5.23 2.38 0.23 19.60 5.26 2.40 0.22 20.00 5.29 2.43 0.20 20.40 5.32 2.45 0.19 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.47 0.19 21.20 5.38 2.49 0.18 21.60 5.41 2.51 0.18 22.00 5.43 2.54 0.18 22.40 5.46 2.56 0.18 22.80 5.48 2.58 0.17 23.20 5.51 2.60 0.17 23.60 5.54 2.62 0.17 24.00 5.56 2.64 0.17 4S 2P PostDev #1 to Storage Storage system #1 System #1 7 5L 3S Outfall PostDev #1 Unrouted Subcat� Reach an Link Drainage Diagram for Post Area #1 Prepared by {enter your company name here }, Printed 9/10/2015 V� HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Post Area #1 Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.330 70 Woods, Good, HSG C (3S) 0.970 74 >75% Grass cover, Good, HSG C (3S, 4S) 0.460 98 Paved parking, HSG C (3S, 4S) 1.760 TOTAL AREA Post Area #1 Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 1.760 HSG C 3S, 4S 0.000 HSG D 0.000 Other 1.760 TOTAL AREA Post Area #1 Prepared by {enter your company name here} Printed 9/10/2015 HydroCADD 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Paqe 4 Pipe Listing (all nodes) Line# Node In- Invert Out - Invert Length Slope n Diam/Width Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 451.50 450.70 30.3 0.0264 0.013 15.0 0.0 0.0 Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Paoe 5 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area =1.110 ac 13.51% Impervious Runoff Depth >1.49" Flow Length =200' Tc =13.4 min CN =76 Runoff =2.25 cfs 0.138 of Subcatchment 4S: PostDev #1 to Storage Runoff Area =0.650 ac 47.69% Impervious Runoff Depth >2.17" Flow Length =200' Tc =9.4 min CN =85 Runoff =2.20 cfs 0.117 of Pond 2P: Storage System #1 Peak Elev= 455.46' Storage =0.039 of Inflow =2.20 cfs 0.117 of Outflow =0.46 cfs 0.117 of Link 5L: Outfall Inflow =2.67 cfs 0.255 of Primary=2.67 cfs 0.255 of Total Runoff Area = 1.760 ac Runoff Volume = 0.255 of Average Runoff Depth = 1.74" 73.86% Pervious = 1.300 ac 26.14% Impervious = 0.460 ac Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 2.25 cfs @ 12.06 hrs, Volume= 0.138 af, Depth> 1.49" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Descriotion 0.150 98 Paved parking, HSG C 0.630 74 >75% Grass cover, Good, HSG C 0.330 70 Woods. Good. HSG C 1.110 76 Weighted Average 0.960 0.13 86.49% Pervious Area 0.150 13.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) fUsec (cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.4 200 Total Subcatchment 3S: PostDev #1 Unrouted Hydrograph 2.25 cfs Type II 24 -hr 2 -Year 2 Rainfall= 3.68" Runoff Area =1.110 ac Runoff Volume =0.138 of Runoff Depth >1.49" 3 Flow Length =200' 1 Tc =13.4 min CN =76 1 - 1 2 4 • 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff hours) (inches) (inches) cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.01 10.80 0.81 0.01 0.02 11.20 0.92 0.02 0.04 11.60 1.13 0.07 0.09 12.00 2.44 0.66 1.93 12.40 2.67 0.80 0.47 12.80 2.79 0.88 0.22 13.20 2.88 0.94 0.17 13.60 2.96 0.99 0.14 14.00 3.02 1.03 0.11 14.40 3.07 1.06 0.10 14.80 3.12 1.10 0.09 15.20 3.16 1.13 0.09 15.60 3.20 1.15 0.08 16.00 3.24 1.18 0.07 16.40 3.27 1.20 0.07 16.80 3.30 1.22 0.06 17.20 3.33 1.25 0.06 17.60 3.36 1.27 0.06 18.00 3.39 1.29 0.05 18.40 3.42 1.30 0.05 18.80 3.44 1.32 0.05 19.20 3.46 1.34 0.05 19.60 3.48 1.35 0.04 20.00 3.50 1.37 0.04 20.40 3.52 1.38 0.04 Time Precip. Excess Runoff hours) (inches) (inches) tcfs 20.80 3.54 1.40 0.04 21.20 3.56 1.41 0.04 21.60 3.58 1.42 0.04 22.00 3.60 1.43 0.04 22.40 3.61 1.45 0.04 22.80 3.63 1.46 0.04 23.20 3.65 1.47 0.03 23.60 3.66 1.49 0.03 24.00 3.68 1.50 0.03 Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 4S: PostDev #1 to Storage System #1 Runoff = 2.20 cfs @ 12.01 hrs, Volume= 0.117 af, Depth> 2.17" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.310 98 Paved parking, HSG C 0.340 74 >75% Grass cover, Good, HSG C 0.650 85 Weighted Average 0.340 52.31 % Pervious Area 0.310 47.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n=0.150 P2=3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4 200 Total Subcatchment 4S: PostDev #1 to Storage System #1 Hydrograph 2.20 cfs 10 Runoff Type II 24 -hr 2 -Year 2 Rainfall= 3.68" Runoff Area =0.650 ac Runoff Volume =0.117 of Runoff Depth >2.17" v 3 Flow Length =200' —° Tc =9.4 min CN =85 0 2 4 • 8 10 12 14 16 18 20 22 24 Time (hours) Post Area #1 Type 11 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.01 0.01 8.80 0.52 0.01 0.01 9.20 0.56 0.02 0.01 9.60 0.61 0.03 0.02 10.00 0.67 0.05 0.02 10.40 0.73 0.07 0.03 10.80 0.81 0.10 0.05 11.20 0.92 0.14 0.08 11.60 1.13 0.24 0.15 12.00 2.44 1.13 2.19 12.40 2.67 1.31 0.29 12.80 2.79 1.42 0.16 13.20 2.88 1.49 0.12 13.60 2.96 1.55 0.10 14.00 3.02 1.60 0.08 14.40 3.07 1.65 0.07 14.80 3.12 1.69 0.07 15.20 3.16 1.73 0.06 15.60 3.20 1.76 0.06 16.00 3.24 1.79 0.05 16.40 3.27 1.82 0.05 16.80 3.30 1.85 0.04 17.20 3.33 1.87 0.04 17.60 3.36 1.90 0.04 18.00 3.39 1.92 0.04 18.40 3.42 1.94 0.04 18.80 3.44 1.96 0.03 19.20 3.46 1.98 0.03 19.60 3.48 2.00 0.03 20.00 3.50 2.02 0.03 20.40 3.52 2.04 0.03 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 2.05 0.03 21.20 3.56 2.07 0.03 21.60 3.58 2.08 0.03 22.00 3.60 2.10 0.03 22.40 3.61 2.12 0.03 22.80 3.63 2.13 0.02 23.20 3.65 2.14 0.02 23.60 3.66 2.16 0.02 24.00 3.68 2.17 0.02 Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here) Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 10 Summary for Pond 2P: Storage System #1 Inflow Area = 0.650 ac, 47.69% Impervious, Inflow Depth > 2.17" for 2 -Year event Inflow = 2.20 cfs @ 12.01 hrs, Volume= 0.117 of Outflow = 0.46 cfs @ 12.24 hrs, Volume= 0.117 af, Atten= 79 %, Lag= 13.8 min Primary = 0.46 cfs @ 12.24 hrs, Volume= 0.117 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Peak Elev= 455.46'@ 12.24 hrs Surf.Area= 0.012 ac Storage= 0.039 of Plug -Flow detention time= 29.8 min calculated for 0.117 of (100% of inflow) Center -of -Mass det. time= 28.7 min ( 847.3 - 818.7 ) Volume Invert Avail.Stora a Storage Description #1 451.50' 0.078 of 96.0" D x 68.0'L Pipe Storage Device Routing Invert Outlet Devices #1 Primary 451.50' 15.0" Round Culvert L= 30.3' Ke= 0.500 Inlet / Outlet Invert= 451.50'/ 450.70' S= 0.0264'/' Cc= 0.900 n= 0.013 #2 Device 1 451.50' 3.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 455.50' 4.2" Vert. Orifice /Grate C= 0.600 #4 Device 1 458.00' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 0.6' Crest Height Primary OutFlow Max =0.46 cfs @ 12.24 hrs HW= 455.46' (Free Discharge) 't-1 =Culvert (Passes 0.46 cfs of 10.79 cfs potential flow) �2= Orifice /Grate (Orifice Controls 0.46 cfs @ 9.43 fps) 3=Orifice/G rate ( Controls 0.00 cfs) 4--Sharp-Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #1 Type 11 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 11 Pond 2P: Storage System #1 Hydrograph K N V ..r 3 0 1 u_ M 11� 457 d " 456 0 a 455 d w 454 453 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #1 Stage- Discharge Sharp- Crested Rectangular Weir Orifice /Grate 452 ,Culvert + Orifice /Grate 0 2 4 6 8 10 12 14 16 Discharge (cfs) Inflow Primary ■ Primary Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HvdroCAD Software Solutions LLC Paae 12 c 0 is d w Pond 2P: Storage System #1 Stage- Area - Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Storage (acre -feet) ■ Storage Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 13 Hydrograph for Pond 2P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 451.50 0.00 1.00 0.00 0.000 451.50 0.00 2.00 0.00 0.000 451.50 0.00 3.00 0.00 0.000 451.50 0.00 4.00 0.00 0.000 451.50 0.00 5.00 0.00 0.000 451.50 0.00 6.00 0.00 0.000 451.50 0.00 7.00 0.00 0.000 451.50 0.00 8.00 0.00 0.000 451.52 0.00 9.00 0.01 0.000 451.57 0.01 10.00 0.02 0.000 451.60 0.02 11.00 0.06 0.000 451.68 0.05 12.00 2.19 0.023 454.14 0.37 13.00 0.14 0.025 454.37 0.39 14.00 0.08 0.007 452.69 0.24 15.00 0.06 0.001 451.72 0.07 16.00 0.05 0.000 451.67 0.05 17.00 0.04 0.000 451.66 0.04 18.00 0.04 0.000 451.64 0.04 19.00 0.03 0.000 451.63 0.03 20.00 0.03 0.000 451.62 0.03 21.00 0.03 0.000 451.61 0.03 22.00 0.03 0.000 451.61 0.03 23.00 0.02 0.000 451.61 0.02 24.00 0.02 0.000 451.61 0.02 Post Area #1 Type lI 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 14 Elevation Primary (feet)_ (cfs) 451.50 0.00 451.54 0.00 451.58 0.01 451.62 0.03 451.66 0.05 451.70 0.06 451.74 0.08 451.78 0.09 451.82 0.10 451.86 0.11 451.90 0.12 451.94 0.13 451.98 0.14 452.02 0.15 452.06 0.16 452.10 0.16 452.14 0.17 452.18 0.18 452.22 0.18 452.26 0.19 452.30 0.19 452.34 0.20 452.38 0.21 452.42 0.21 452.46 0.22 452.50 0.22 452.54 0.23 452.58 0.23 452.62 0.24 452.66 0.24 452.70 0.25 452.74 0.25 452.78 0.25 452.82 0.26 452.86 0.26 452.90 0.27 452.94 0.27 452.98 0.28 453.02 0.28 453.06 0.28 453.10 0.29 453.14 0.29 453.18 0.29 453.22 0.30 453.26 0.30 453.30 0.31 453.34 0.31 453.38 0.31 453.42 0.32 453.46 0.32 453.50 0.32 453.54 0.33 Stage- Discharge for Pond 2P: Storage System #1 Elevation Primary (feet) (cfs) 453.58 0.33 453.62 0.33 453.66 0.34 453.70 0.34 453.74 0.34 453.78 0.35 453.82 0.35 453.86 0.35 453.90 0.36 453.94 0.36 453.98 0.36 454.02 0.37 454.06 0.37 454.10 0.37 454.14 0.37 454.18 0.38 454.22 0.38 454.26 0.38 454.30 0.39 454.34 0.39 454.38 0.39 454.42 0.40 454.46 0.40 454.50 0.40 454.54 0.40 454.58 0.41 454.62 0.41 454.66 0.41 454.70 0.41 454.74 0.42 454.78 0.42 454.82 0.42 454.86 0.43 454.90 0.43 454.94 0.43 454.98 0.43 455.02 0.44 455.06 0.44 455.10 0.44 455.14 0.44 455.18 0.45 455.22 0.45 455.26 0.45 455.30 0.45 455.34 0.46 455.38 0.46 455.42 0.46 455.46 0.46 455.50 0.47 455.54 0.47 455.58 0.49 455.62 0.51 Elevation Primary (feet) (cfs) 455.66 0.53 455.70 0.56 455.74 0.60 455.78 0.63 455.82 0.66 455.86 0.69 455.90 0.71 455.94 0.73 455.98 0.75 456.02 0.77 456.06 0.79 456.10 0.80 456.14 0.82 456.18 0.83 456.22 0.85 456.26 0.86 456.30 0.88 456.34 0.89 456.38 0.90 456.42 0.92 456.46 0.93 456.50 0.94 456.54 0.95 456.58 0.97 456.62 0.98 456.66 0.99 456.70 1.00 456.74 1.01 456.78 1.02 456.82 1.03 456.86 1.05 456.90 1.06 456.94 1.07 456.98 1.08 457.02 1.09 457.06 1.10 457.10 1.11 457.14 1.12 457.18 1.13 457.22 1.13 457.26 1.14 457.30 1.15 457.34 1.16 457.38 1.17 457.42 1.18 457.46 1.19 457.50 1.20 457.54 1.21 457.58 1.22 457.62 1.22 457.66 1.23 457.70 1.24 Elevation Primary (feet) _ _ (cfs) 457.74 1.25 457.78 1.26 457.82 117 457.86 1.27 457.90 1.28 457.94 1.29 457.98 1.30 458.02 1.34 458.06 1.51 458.10 1.74 458.14 2.03 458.18 2.36 458.22 2.74 458.26 3.16 458.30 3.61 458.34 4.09 458.38 4.61 458.42 5.17 458.46 5.75 458.50 6.37 458.54 7.01 458.58 7.69 458.62 8.39 458.66 9.12 458.70 9.88 458.74 10.67 458.78 11.48 458.82 12.33 458.86 13.20 458.90 14.09 458.94 15.01 458.98 15.47 459.02 15.52 459.06 15.56 459.10 15.61 459.14 15.65 459.18 15.69 459.22 15.74 459.26 15.78 459.30 15.83 459.34 15.87 459.38 15.92 459.42 15.96 459.46 16.00 459.50 16.05 Post Area #1 Type 11 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD@ 9.10 s/n 06538© 2010 HydroCAD Software Solutions LLC Page 15 Stage -Area- Storage for Pond 2P: Storage System #1 Elevation Storage (feet) (acre -feet) 451.50 0.000 451.60 0.000 451.70 0.001 451.80 0.001 451.90 0.001 452.00 0.002 452.10 0.003 452.20 0.003 452.30 0.004 452.40 0.005 452.50 0.006 452.60 0.007 452.70 0.007 452.80 0.008 452.90 0.009 453.00 0.010 453.10 0.011 453.20 0.012 453.30 0.013 453.40 0.014 453.50 0.015 453.60 0.016 453.70 0.018 453.80 0.019 453.90 0.020 454.00 0.021 454.10 0.022 454.20 0.023 454.30 0.024 454.40 0.026 454.50 0.027 454.60 0.028 454.70 0.029 454.80 0.031 454.90 0.032 455.00 0.033 455.10 0.034 455.20 0.035 455.30 0.037 455.40 0.038 455.50 0.039 455.60 0.040 455.70 0.042 455.80 0.043 455.90 0.044 456.00 0.045 456.10 0.047 456.20 0.048 456.30 0.049 456.40 0.050 456.50 0.052 456.60 0.053 Elevation Storage (feet) (acre -feet) 456.70 0.054 456.80 0.055 456.90 0.056 457.00 0.058 457.10 0.059 457.20 0.060 457.30 0.061 457.40 0.062 457.50 0.063 457.60 0.064 457.70 0.065 457.80 0.066 457.90 0.067 458.00 0.068 458.10 0.069 458.20 0.070 458.30 0.071 458.40 0.072 458.50 0.073 458.60 0.074 458.70 0.074 458.80 0.075 458.90 0.076 459.00 0.076 459.10 0.077 459.20 0.078 459.30 0.078 459.40 0.078 459.50 0.078 Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Pace 16 Summary for Link 5L: Outfall Inflow Area = 1.760 ac, 26.14% Impervious, Inflow Depth > 1.74" for 2 -Year event Inflow = 2.67 cfs @ 12.06 hrs, Volume= 0.255 of Primary = 2.67 cfs @ 12.06 hrs, Volume= 0.255 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs v 3 0 M FA 1 0 Link 5L: Outfall Hydrograph 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Inflow Primary Post Area #1 Type 11 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HvdroCAD Software Solutions LLC Paae 17 Hydrograph for Link 5L: Outfall Time Inflow hours] cfs) Elevation (feet) Primary (cfs) 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.00 0.00 0.00 6.80 0.00 0.00 0.00 7.20 0.00 0.00 0.00 7.60 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.40 0.01 0.00 0.01 8.80 0.01 0.00 0.01 9.20 0.01 0.00 0.01 9.60 0.02 0.00 0.02 10.00 0.02 0.00 0.02 10.40 0.04 0.00 0.04 10.80 0.06 0.00 0.06 11.20 0.11 0.00 0.11 11.60 0.20 0.00 0.20 12.00 2.30 0.00 2.30 12.40 0.93 0.00 0.93 12.80 0.64 0.00 0.64 13.20 0.53 0.00 0.53 13.60 0.45 0.00 0.45 14.00 0.36 0.00 0.36 14.40 0.27 0.00 0.27 14.80 0.19 0.00 0.19 15.20 0.15 0.00 0.15 15.60 0.13 0.00 0.13 16.00 0.12 0.00 0.12 16.40 0.11 0.00 0.11 16.80 0.11 0.00 0.11 17.20 0.10 0.00 0.10 17.60 0.10 0.00 0.10 18.00 0.09 0.00 0.09 18.40 0.09 0.00 0.09 18.80 0.08 0.00 0.08 19.20 0.08 0.00 0.08 19.60 0.07 0.00 0.07 20.00 0.07 0.00 0.07 20.40 0.07 0.00 0.07 Time Inflow Elevation Primary (hours) (cfs) (feet) tCfs) 20.80 0.06 0.00 0.06 21.20 0.06 0.00 0.06 21.60 0.06 0.00 0.06 22.00 0.06 0.00 0.06 22.40 0.06 0.00 0.06 22.80 0.06 0.00 0.06 23.20 0.06 0.00 0.06 23.60 0.06 0.00 0.06 24.00 0.06 0.00 0.06 Post Area #1 Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 18 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area =1.110 ac 13.51% Impervious Runoff Depth >2.99" Flow Length =200' Tc =13.4 min CN =76 Runoff =4.55 cfs 0.277 of Subcatchment 4S: PostDev #1 to Storage Runoff Area =0.650 ac 47.69% Impervious Runoff Depth >3.88" Flow Length =200' Tc =9.4 min CN =85 Runoff =3.85 cfs 0.210 of Pond 2P: Storage System #1 Peak Elev= 457.90' Storage =0.067 of Inflow =3.85 cfs 0.210 of Outflow =1.28 cfs 0.210 of Link 5L: Outfall Inflow =5.67 cfs 0.487 of Primary=5.67 cfs 0.487 of Total Runoff Area = 1.760 ac Runoff Volume = 0.487 of Average Runoff Depth = 3.32" 73.86% Pervious = 1.300 ac 26.14% Impervious = 0.460 ac Post Area #1 Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 4.55 cfs @ 12.05 hrs, Volume= 0.277 af, Depth> 2.99" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.150 98 Paved parking, HSG C 0.630 74 >75% Grass cover, Good, HSG C 0.330 70 Woods, Good, HSG C 1.110 76 Weighted Average 0.960 0.13 86.49% Pervious Area 0.150 13.51% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fns 13.4 200 Total 4 3 3 0 M 2 Subcatchment 3S: PostDev #1 Unrouted Hydrograph 4.55 cfs Type 11 24-hr 10-Year • Runoff �1 Runoff . -. •• Flow 00 Tc=13.4 min 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Post Area #1 Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 20 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.01 8.80 0.78 0.01 0.01 9.20 0.85 0.01 0.02 9.60 0.92 0.02 0.03 10.00 1.01 0.04 0.04 10.40 1.11 0.06 0.06 10.80 1.23 0.10 0.09 11.20 1.40 0.15 0.15 11.60 1.71 0.27 0.28 12.00 3.69 1.50 4.03 12.40 4.03 1.76 0.89 12.80 4.22 1.91 0.41 13.20 4.36 2.02 0.30 13.60 4.47 2.10 0.25 14.00 4.56 2.18 0.20 14.40 4.64 2.24 0.18 14.80 4.71 2.30 0.17 15.20 4.78 2.35 0.15 15.60 4.84 2.40 0.14 16.00 4.89 2.45 0.12 16.40 4.94 2.49 0.12 16.80 4.99 2.53 0.11 17.20 5.04 2.57 0.11 17.60 5.08 2.60 0.10 18.00 5.12 2.64 0.10 18.40 5.16 2.67 0.09 18.80 5.20 2.70 0.09 19.20 5.23 2.73 0.08 19.60 5.26 2.75 0.08 20.00 5.29 2.78 0.07 20.40 5.32 2.80 0.07 Time Precip. Excess Runoff hours (inches) (nches) (cfs) 20.80 5.35 2.83 0.07 21.20 5.38 2.85 0.07 21.60 5.41 2.87 0.06 22.00 5.43 2.90 0.06 22.40 5.46 2.92 0.06 22.80 5.48 2.94 0.06 23.20 5.51 2.96 0.06 23.60 5.54 2.98 0.06 24.00 5.56 3.00 0.06 Post Area #1 Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment 4S: PostDev #1 to Storage System #1 Runoff = 3.85 cfs @ 12.01 hrs, Volume= 0.210 af, Depth> 3.88" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.310 98 Paved parking, HSG C 0.340 74 >75% Grass cover, Good, HSG C 0.650 85 Weighted Average 0.340 52.31 % Pervious Area 0.310 47.69% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (fUsec) (cfs) 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n=0.150 P2=3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4 n 0 2 M is 200 Total Subcatchment 4S: PostDev #1 to Storage System #1 Hydrograph 3.85 cfs Type II 24 -hr 10 -Year Rainfall = 5.56" Runoff Area =0.650 ac Runoff Volume =0.210 of Runoff Depth >3.88" Flow Length =200' Tc =9.4 min CN =85 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Runoff Post Area #1 Type 11 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 22 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #1 Time Precip. Excess Runoff hours] (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.01 6.40 0.49 0.01 0.01 6.80 0.53 0.02 0.01 7.20 0.57 0.02 0.01 7.60 0.62 0.03 0.02 8.00 0.67 0.05 0.02 8.40 0.72 0.06 0.03 8.80 0.78 0.08 0.04 9.20 0.85 0.11 0.04 9.60 0.92 0.14 0.05 10.00 1.01 0.18 0.06 10.40 1.11 0.23 0.08 10.80 1.23 0.29 0.11 11.20 1.40 0.39 0.17 11.60 1.71 0.59 0.31 12.00 3.69 2.18 3.84 12.40 4.03 2.49 0.48 12.80 4.22 2.65 0.26 13.20 4.36 2.78 0.20 13.60 4.47 2.88 0.16 14.00 4.56 2.96 0.13 14.40 4.64 3.04 0.12 14.80 4.71 3.10 0.11 15.20 4.78 3.16 0.10 15.60 4.84 3.22 0.09 16.00 4.89 3.27 0.08 16.40 4.94 3.32 0.08 16.80 4.99 3.36 0.07 17.20 5.04 3.40 0.07 17.60 5.08 3.44 0.07 18.00 5.12 3.48 0.06 18.40 5.16 3.52 0.06 18.80 5.20 3.55 0.06 19.20 5.23 3.58 0.05 19.60 5.26 3.61 0.05 20.00 5.29 3.64 0.05 20.40 5.32 3.67 0.04 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 3.69 0.04 21.20 5.38 3.72 0.04 21.60 5.41 3.74 0.04 22.00 5.43 3.77 0.04 22.40 5.46 3.79 0.04 22.80 5.48 3.82 0.04 23.20 5.51 3.84 0.04 23.60 5.54 3.87 0.04 24.00 5.56 3.89 0.04 Post Area #1 Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Paae 23 Summary for Pond 2P: Storage System #1 Inflow Area = 0.650 ac, 47.69% Impervious, Inflow Depth > 3.88" for 10 -Year event Inflow = 3.85 cfs @ 12.01 hrs, Volume= 0.210 of Outflow = 1.28 cfs @ 12.16 hrs, Volume= 0.210 af, Atten= 67 %, Lag= 9.4 min Primary = 1.28 cfs @ 12.16 hrs, Volume= 0.210 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Peak Elev= 457.90'@ 12.16 hrs Surf.Area= 0.010 ac Storage= 0.067 of Plug -Flow detention time= 30.2 min calculated for 0.210 of (100% of inflow) Center -of -Mass det. time= 29.2 min ( 831.5 - 802.2 ) Volume Invert Avail.Storage Storage Description #1 451.50' 0.078 of 96.0" D x 68.0'L Pipe Storage Device Routine Invert Outlet Devices #1 Primary 451.50' 15.0" Round Culvert L= 30.3' Ke= 0.500 Inlet / Outlet Invert= 451.50'/ 450.70' S= 0.0264T Cc= 0.900 n= 0.013 #2 Device 1 451.50' 3.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 455.50' 4.2" Vert. Orifice /Grate C= 0.600 #4 Device 1 458.00' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 0.6' Crest Height Primary OutFlow Max =1.28 cfs @ 12.16 hrs HW= 457.89' (Free Discharge) "�-1= Culvert (Passes 1.28 cfs of 14.19 cfs potential flow) P4=Sharp-Crested =Orifice /Grate (Orifice Controls 0.59 cfs @ 12.06 fps) = Orifice /Grate (Orifice Controls 0.69 cfs @ 7.17 fps) Rectangular Weir ( Controls 0.00 cfs) Post Area #1 Type 11 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 24 Pond 2P: Storage System #1 Hydrograph 2 0 2 1 V 459 458 457 " 456 c 0 455 d w 454 453 452 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Pond 2P: Storage System #1 Stage- Discharge Sharp- Crested Rectangular Weir Orifice /Gratz Culvert + Orifice /Grate 0 2 4 6 8 10 12 14 16 Discharge (cfs) ■ Inflow ■ Primary Primary Post Area #1 Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC PzLqe 25 d d c 0 R m w Pond 2P: Storage System #1 Stage- Area - Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 Storage (acre -feet) Storage Post Area #1 Type// 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 26 Hydrograph for Pond 2P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 451.50 0.00 1.00 0.00 0.000 451.50 0.00 2.00 0.00 0.000 451.50 0.00 3.00 0.00 0.000 451.50 0.00 4.00 0.00 0.000 451.50 0.00 5.00 0.00 0.000 451.50 0.00 6.00 0.01 0.000 451.53 0.00 7.00 0.01 0.000 451.57 0.01 8.00 0.02 0.000 451.60 0.02 9.00 0.04 0.000 451.64 0.04 10.00 0.06 0.000 451.69 0.06 11.00 0.14 0.001 451.86 0.11 12.00 3.84 0.046 456.05 0.78 13.00 0.23 0.037 455.36 0.46 14.00 0.13 0.018 453.76 0.35 15.00 0.10 0.005 452.40 0.21 16.00 0.08 0.001 451.77 0.09 17.00 0.07 0.001 451.72 0.07 18.00 0.06 0.001 451.70 0.06 19.00 0.05 0.000 451.68 0.05 20.00 0.05 0.000 451.66 0.05 21.00 0.04 0.000 451.65 0.04 22.00 0.04 0.000 451.65 0.04 23.00 0.04 0.000 451.65 0.04 24.00 0.04 0.000 451.64 0.04 Post Area #1 Type// 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 HydroCADO 9.10 s/n 06538 © 2010 HydroCAD Software Solutions LLC Page 27 Elevation Primary (feet) (cfs) 451.50 0.00 451.54 0.00 451.58 0.01 451.62 0.03 451.66 0.05 451.70 0.06 451.74 0.08 451.78 0.09 451.82 0.10 451.86 0.11 451.90 0.12 451.94 0.13 451.98 0.14 452.02 0.15 452.06 0.16 452.10 0.16 452.14 0.17 452.18 0.18 452.22 0.18 452.26 0.19 452.30 0.19 452.34 0.20 452.38 0.21 452.42 0.21 452.46 0.22 452.50 0.22 452.54 0.23 452.58 0.23 452.62 0.24 452.66 0.24 452.70 0.25 452.74 0.25 452.78 0.25 452.82 0.26 452.86 0.26 452.90 0.27 452.94 0.27 452.98 0.28 453.02 0.28 453.06 0.28 453.10 0.29 453.14 0.29 453.18 0.29 453.22 0.30 453.26 0.30 453.30 0.31 453.34 0.31 453.38 0.31 453.42 0.32 453.46 0.32 453.50 0.32 453.54 0.33 Stage- Discharge for Pond 2P: Storage System #1 Elevation Primary feet cfs 453.58 0.33 453.62 0.33 453.66 0.34 453.70 0.34 453.74 0.34 453.78 0.35 453.82 0.35 453.86 0.35 453.90 0.36 453.94 0.36 453.98 0.36 454.02 0.37 454.06 0.37 454.10 0.37 454.14 0.37 454.18 0.38 454.22 0.38 454.26 0.38 454.30 0.39 454.34 0.39 454.38 0.39 454.42 0.40 454.46 0.40 454.50 0.40 454.54 0.40 454.58 0.41 454.62 0.41 454.66 0.41 454.70 0.41 454.74 0.42 454.78 0.42 454.82 0.42 454.86 0.43 454.90 0.43 454.94 0.43 454.98 0.43 455.02 0.44 455.06 0.44 455.10 0.44 455.14 0.44 455.18 0.45 455.22 0.45 455.26 0.45 455.30 0.45 455.34 0.46 455.38 0.46 455.42 0.46 455.46 0.46 455.50 0.47 455.54 0.47 455.58 0.49 455.62 0.51 Elevation Primary (feet) (cfs) 455.66 0.53 455.70 0.56 455.74 0.60 455.78 0.63 455.82 0.66 455.86 0.69 455.90 0.71 455.94 0.73 455.98 0.75 456.02 0.77 456.06 0.79 456.10 0.80 456.14 0.82 456.18 0.83 456.22 0.85 456.26 0.86 456.30 0.88 456.34 0.89 456.38 0.90 456.42 0.92 456.46 0.93 456.50 0.94 456.54 0.95 456.58 0.97 456.62 0.98 456.66 0.99 456.70 1.00 456.74 1.01 456.78 1.02 456.82 1.03 456.86 1 05 456.90 1.06 456.94 1.07 456.98 1 08 457.02 1.09 457.06 110 457.10 1.11 457.14 1.12 457.18 1.13 457.22 1.13 457.26 1.14 457.30 1.15 457.34 1.16 457.38 1.17 457.42 1.18 457.46 1.19 457.50 1.20 457.54 1.21 457.58 1.22 457.62 1.22 457.66 1.23 457.70 1.24 Elevation Primary (feet) (cfs) 457.74 1.25 457.78 1.26 457.82 1.27 457.86 1.27 457.90 1.28 457.94 1.29 457.98 1.30 458.02 1.34 458.06 1.51 458.10 1.74 458.14 2.03 458.18 2.36 458.22 2.74 458.26 3.16 458.30 3.61 458.34 4.09 458.38 4.61 458.42 5.17 458.46 5.75 458.50 6.37 458.54 7.01 458.58 7.69 458.62 8.39 458.66 9.12 458.70 9.88 458.74 10.67 458.78 11.48 458.82 12.33 458.86 13.20 458.90 14.09 458.94 15.01 458.98 15.47 459.02 15.52 459.06 15.56 459.10 15.61 459.14 15.65 459.18 15.69 459.22 15.74 459.26 15.78 459.30 15.83 459.34 15.87 459.38 15.92 459.42 15.96 459.46 16.00 459.50 16.05 Post Area #1 Type 11 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 28 Stage -Area- Storage for Pond 2P: Storage System #1 Elevation Storage (feet) (acre -feet) 451.50 0.000 451.60 0.000 451.70 0.001 451.80 0.001 451.90 0.001 452.00 0.002 452.10 0.003 452.20 0.003 452.30 0.004 452.40 0.005 452.50 0.006 452.60 0.007 452.70 0.007 452.80 0.008 452.90 0.009 453.00 0.010 453.10 0.011 453.20 0.012 453.30 0.013 453.40 0.014 453.50 0.015 453.60 0.016 453.70 0.018 453.80 0.019 453.90 0.020 454.00 0.021 454.10 0.022 454.20 0.023 454.30 0.024 454.40 0.026 454.50 0.027 454.60 0.028 454.70 0.029 454.80 0.031 454.90 0.032 455.00 0.033 455.10 0.034 455.20 0.035 455.30 0.037 455.40 0.038 455.50 0.039 455.60 0.040 455.70 0.042 455.80 0.043 455.90 0.044 456.00 0.045 456.10 0.047 456.20 0.048 456.30 0.049 456.40 0.050 456.50 0.052 456.60 0.053 Elevation Storage (feet_)_ -Cacre -feed 456.70 0.054 456.80 0.055 456.90 0.056 457.00 0.058 457.10 0.059 457.20 0.060 457.30 0.061 457.40 0.062 457.50 0.063 457.60 0.064 457.70 0.065 457.80 0.066 457.90 0.067 458.00 0.068 458.10 0.069 458.20 0.070 458.30 0.071 458.40 0.072 458.50 0.073 458.60 0.074 458.70 0.074 458.80 0.075 458.90 0.076 459.00 0.076 459.10 0.077 459.20 0.078 459.30 0.078 459.40 0.078 459.50 0.078 Post Area #1 Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCA00 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 29 Summary for Link 5L: Outfall Inflow Area = 1.760 ac, 26.14% Impervious, Inflow Depth > 3.32" for 10 -Year event Inflow = 5.67 cfs @ 12.06 hrs, Volume= 0.487 of Primary = 5.67 cfs @ 12.06 hrs, Volume= 0.487 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs 6 5 U 4 v 0 3 2 1 0 0 Link 5L: Outfall Hydrograph 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) ■ Inflow ■ Primary Post Area #1 Type 11 24 -hr 10 -Year Rainfall= 5.56" Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 30 Hydrograph for Link 5L: Outfall Time Inflow Elevation Primary (hours ) �cfs} (feet) (cfs} 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.01 0.00 0.01 6.80 0.01 0.00 0.01 7.20 0.01 0.00 0.01 7.60 0.02 0.00 0.02 8.00 0.02 0.00 0.02 8.40 0.03 0.00 0.03 8.80 0.05 0.00 0.05 9.20 0.06 0.00 0.06 9.60 0.08 0.00 0.08 10.00 0.10 0.00 0.10 10.40 0.14 0.00 0.14 10.80 0.19 0.00 0.19 11.20 0.28 0.00 0.28 11.60 0.47 0.00 0.47 12.00 4.81 0.00 4.81 12.40 1.98 0.00 1.98 12.80 0.95 0.00 0.95 13.20 0.74 0.00 0.74 13.60 0.64 0.00 0.64 14.00 0.55 0.00 0.55 14.40 0.47 0.00 0.47 14.80 0.40 0.00 0.40 15.20 0.33 0.00 0.33 15.60 0.26 0.00 0.26 16.00 0.21 0.00 0.21 16.40 0.19 0.00 0.19 16.80 0.18 0.00 0.18 17.20 0.17 0.00 0.17 17.60 0.17 0.00 0.17 18.00 0.16 0.00 0.16 18.40 0.15 0.00 0.15 18.80 0.14 0.00 0.14 19.20 0.13 0.00 0.13 19.60 0.12 0.00 0.12 20.00 0.12 0.00 0.12 20.40 0.11 0.00 0.11 Time Inflow Elevation Primary (hours) cfs) (feet) (cfs) 20.80 0.11 0.00 0.11 21.20 0.11 0.00 0.11 21.60 0.11 0.00 0.11 22.00 0.10 0.00 0.10 22.40 0.10 0.00 0.10 22.80 0.10 0.00 0.10 23.20 0.10 0.00 0.10 23.60 0.10 0.00 0.10 24.00 0.10 0.00 0.10 Post Area #2 Prepared by {enter your company name here} Printed 9/10/2015 H droCAD® 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.350 70 Woods, Good, HSG C (1 S) 1.610 74 >75% Grass cover, Good, HSG C (1 S, 3S) 0.250 98 Impervious (1S) 0.990 98 Paved parking, HSG B (3S) 3.200 TOTAL AREA Post Area #2 Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.990 HSG B 3S 1.960 HSG C 1 S, 3S 0.000 HSG D 0.250 Other is 3.200 TOTAL AREA Post Area #2 Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 4 Pipe Listing (all nodes) Line# Node In -Invert Out -Invert Length Slope n Diam/W idth Height Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 464.00 462.50 78.8 0.0190 0.013 15.0 0.0 0.0 Post Area #2 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCAD® 9.10 s/n 06538 @2010 H droCAD Software Solutions LLC Page 5 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PostDev #2 Unrouted Runoff Area =1.780 ac 14.04% Impervious Runoff Depth >1.56" Flow Length =380' Tc =21.0 min CN =77 Runoff =2.97 cfs 0.231 of Subcatchment 3S: PostDev #2 to Storage Runoff Area =1.420 ac 69.72% Impervious Runoff Depth >2.71" Tc =6.0 min CN =91 Runoff =6.51 cfs 0.321 of Pond 2P: Storage System #2 Peak Elev= 468.40' Storage =0.104 of Inflow =6.51 cfs 0.321 of Outflow =1.45 cfs 0.320 of Link 3L: Outfall Inflow =4.42 cfs 0.551 of Primary=4.42 cfs 0.551 of Total Runoff Area = 3.200 ac Runoff Volume = 0.551 of Average Runoff Depth = 2.07" 61.25% Pervious = 1.960 ac 38.75% Impervious =1.240 ac Post Area #2 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 H droCADO 9.10 s/n 06538 © 2010 H droCAD Software Solutions LLC Page 6 Summary for Subcatchment 1 S: PostDev #2 Unrouted Runoff = 2.97 cfs @ 12.15 hrs, Volume= 0.231 af, Depth> 1.56" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Descriotion 0.250 98 Impervious 1.180 74 >75% Grass cover, Good, HSG C 0.350 70 Woods, Good, HSG C 1.780 77 Weighted Average 1.530 0.09 85.96% Pervious Area 0.250 14.04% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) ft/sec) (cfs) 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Perim= 2.0' r= 1.00' n= 0.240 21.0 380 Total 3 2 3 0 M 1 0 Subcatchment 1 S: PostDev #2 Unrouted Hydrograph 2.97 cfs I I 10 Runoff Type II 24 -hr 2 -Year Rainfall= 3.68" Runoff Area =1.780 ac Runoff Volume =0.231 of Runoff Depth >1.56" Flow Length =380' Tc =21.0 min CN =77 0 2 4 6 8 10 12 14 16 18 20 22 24 Time (hours) Post Area #2 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HydroCAD® 9.10 s/n 06538 @2010 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: PostDev #2 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.00 6.50 0.33 0.00 0.00 7.00 0.36 0.00 0.00 7.50 0.40 0.00 0.00 8.00 0.44 0.00 0.00 8.50 0.49 0.00 0.00 9.00 0.54 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.67 0.00 0.00 10.50 0.75 0.01 0.02 11.00 0.86 0.02 0.05 11.50 1.04 0.06 0.11 12.00 2.44 0.70 1.79 12.50 2.70 0.87 0.95 13.00 2.84 0.96 0.36 13.50 2.94 1.03 0.25 14.00 3.02 1.08 0.20 14.50 3.08 1.13 0.17 15.00 3.14 1.17 0.15 15.50 3.19 1.21 0.13 16.00 3.24 1.24 0.12 16.50 3.28 1.27 0.11 17.00 3.32 1.30 0.10 17.50 3.36 1.32 0.10 18.00 3.39 1.35 0.09 18.50 3.42 1.37 0.09 19.00 3.45 1.39 0.08 19.50 3.48 1.41 0.07 20.00 3.50 1.43 0.07 20.50 3.53 1.45 0.06 21.00 3.55 1.47 0.06 21.50 3.57 1.48 0.06 22.00 3.60 1.50 0.06 22.50 3.62 1.52 0.06 23.00 3.64 1.53 0.06 23.50 3.66 1..55 0.06 24.00 3.68 1.57 0.06 Post Area #2 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by {enter your company name here} Printed 9/10/2015 HvdroCAD® 9.10 s/n 06538 © 2010 HvdroCAD Software Solutions LLC Paae 8 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 6.51 cfs @ 11.97 hrs, Volume= 0.321 af, Depth> 2.71" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Descriotion 0.990 98 Paved parking, HSG B 0.430 74 >75% Grass cover, Good, HSG C 1.420 91 Weighted Average 0.430 30.28% Pervious Area 0.990 69.72% Impervious Area Tc Length Slope Velocity Capacity Description _(min)_ (_feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph 6.51 cfs 11 Runoff Type II 24 -hr 2 -Year 6 Rainfall= 3.68" 5 Runoff Area =1.420 ac N Runoff Volume =0.321 of 4 Runoff Depth >2.71" 0 3 Tc =6.0 min u_ CN =91 2 i 1 •iiri�iiirfirrriiirrrrrrr rrr.... —= - - - - _ � _ �� f 1 2 4 • 8 10 12 14 16 18 20 22 24 Time (hours) DUNLORA V COUNTY OF ALBEMARLE, VIRGINIA `7`1PQ PLAN DESIGN CALCULATIONS & NARRATIVE JUNE 229 2015 0 0000 0% TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Craig Kotarski, PE Timmons Group 9192 nd Street S.E. Charlottesville, VA 22901 434.327.1688 0i 'J CLATG W. 7. KO'CAR5Ki Lic. No. 0402048507 rs Table of Contents Section Title Project Narrative 2 LD 229 — Storm Sewer Design Computations 3 LD 204 — Storm Inlet Design Computations 4 LD 347 — Hydraulic Grade Line Analysis Pre - Developed HydroCAD Calculations 6 Post - Developed HydroCAD Calculations Project Narrative: This project is a residential development that includes the addition of 20 single family lots with associated roads, sidewalks, and utilities. Limits of clearing and grading is 3.87 acres. Water Quality: In the proposed condition there will be 2.40 acres of managed turf, 1.74 acres of impervious cover, and 0.84 acres of forest. Per the Virginia Runoff Reduction Redevelopment Spreadsheet, this will required that 2.89 lbs of phosphorus be removed per year. Phosphorus credits will be purchased. Water Quantity: The site consists of two drainage areas. Drainage area 1 drains to the North where it ultimately outfalls into the Dunlora Pond. An underground pipe storage system is being provided to reduce flow back to pre - developed rates. From the storage pipes the storm sewer system connects to an existing drop inlet on Shepherds Midge Road. The existing pond drains to Town Branch, eventually making its way eastward to the Rivanna River. Drainage area 2 drains to the south. An underground pipe storage system is being provided to reduce flaw back to pre - developed rates. From the storage system the storm sewer system connects to an existing drop inlet located within the Rio Road Right of Way. This structure drains across the road through CATEC, eventually out falling and discharging into Meadow Creek. \ ( a a ¥ k ! \ \ k _ < eZ G0K CL\\ 2 0 k 2 S -ul e W Z 3: ) LLI LL §§ -j (D (-n- § 6 § � b\ !ESlR7aƒ!«Ggƒ%:S!)gm §ap , Am$«7f �; ! %315952! \55/35) /g =m�,�__ 2 §j �»go «@SZ /a)s3Se /3§j j\ g } E \!5!@)!\ ±5! § ;::z;; 16 )/ - - - -- - - -- - - -- §ap , Am$«7f «mq ;Am ` �f;q«anxl49 ; ;e»f\ =m�,�__ §j �»go «@SZ /a)s3Se /3§j j\ g N LL � N W N W ;B N z 0 a D 0 0 U W Z_ K W fe K O P IN ONE III IN I I I INN I Bill IN INN Ill ill IN I i Ell No I I All I oil ill I 11 IN INN IN I ill E 19 1 IN IM I 1 11 0 W . w � O U a x 3 a o� a u 3 �a JS �) §k§ 01 ll \ :! pq 0 LU � !`!� )§d §d !E §§2 §§ f{ :: J q%q q§ ; () (§`!© /0 ()§ (§ §) FL�!° !EaE �� _ „ s■ \ \ *e0 mmm 10 0 0 � §$ 0 J]@ )K § 1S PreDev #1 PreDev #2 Pre Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD®10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.110 74 >75% Grass cover, Good, HSG C (1 S) 0.160 98 Impervious (2S) 0.260 74 Pasture /grassland /range, Good, HSG C (2S) 0.120 98 Paved parking, HSG C (1S) 4.290 70 Woods, Good, HSG C (1 S, 2S) 4.940 72 TOTAL AREA Pre Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD ®10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pacie 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 4.780 HSG C 1 S, 2S 0.000 HSG D 0.160 Other 2S 4.940 TOTAL AREA Pre Printed 6/20/2015 Prepared by TG- MOSYSCON Pa e 4 r-{ drOCAD@ 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchm Numbers (acres) (acres) (acres) (acres) (acres) (acres) Cover 0.000 0.000 0.110 0.000 0.000 0.110 >75% Grass cover, Good is 0.000 0.000 0.000 0.000 0.160 0.160 Impervious Pasture /grassland /range, Good 2S 0.000 0.000 0.260 0.000 0.000 0.260 1S 0.000 0.000 0.120 0.000 0.000 0.120 Paved parking 1 S 0.000 0.000 4.290 0.000 0.000 4.290 Woods, Good 2S 0.000 0.000 4.780 0.000 0.160 4.940 TOTAL AREA Pre Type 1124 -hr 1 -Year Rainfall = 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD®10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 5 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1 S: PreDev #1 Runoff Area =1.610 ac 7.45% Impervious Runoff Depth >0.83" Flow Length =201' Tc =13.2 min CN =72 Runoff =1.73 cfs 0.111 of Subcatchment 2S: PreDev #2 Runoff Area =3.330 ac 4.80% Impervious Runoff Depth >0.83" Flow Length =351' Tc =19.7 min CN =72 Runoff =2.84 cfs 0.229 of Total Runoff Area = 4.940 ac Runoff Volume = 0.340 of Average Runoff Depth = 0.83" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type 11 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 stn 06538 © 2013 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1 S: PreDev #1 Runoff = 1.73 cfs @ 12.06 hrs, Volume= 0.111 af, Depth> 0.83" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover. Good. HSG C 1.610 72 Weighted Average 1.490 0.13 92.55% Pervious Area 0.120 7.45% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fns 13.2 201 Total H 3 0 LL Subcatchment 1 S: PreDev #1 Hydrograph Type II 24 -hr' 1 -Year Rainfall= 3.04" Runoff Area--1.610 ac. Runoff Volume =0.111 of Runoff Depth>0.83" Flow Length =201' Tc =13.2 min CN =72 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) I ■ Runoff Pre Type 11 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: PreDev #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.01 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.04 0.00 0.00 1.60 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.40 0.08 0.00 0.00 2.80 0.10 0.00 0.00 3.20 0.11 0.00 0.00 3.60 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.40 0.16 0.00 0.00 4.80 0.18 0.00 0.00 5.20 0.20 0.00 0.00 5.60 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.40 0.27 0.00 0.00 6.80 0.29 0.00 0.00 7.20 0.31 0.00 0.00 7.60 0.34 0.00 0.00 8.00 0.36 0.00 0.00 8.40 0.39 0.00 0.00 8.80 0.43 0.00 0.00 9.20 0.47 0.00 0.00 9.60 0.51 0.00 0.00 10.00 0.55 0.00 0.00 10.40 0.60 0.00 0.00 10.80 0.67 0.00 0.00 11.20 0.76 0.00 0.00 11.60 0.93 0.01 0.02 12.00 2.02 0.30 1.40 12.40 2.20 0.38 0.40 12.80 2.31 0.43 0.20 13.20 2.38 0.47 0.15 13.60 2.44 0.50 0.12 14.00 2.49 0.52 0.10 14.40 2.54 0.55 0.09 14.80 2.58 0.57 0.09 15.20 2.61 0.59 0.08 15.60 2.65 0.61 0.07 16.00 2.68 0.62 0.07 16.40 2.70 0.64 0.06 16.80 2.73 0.65 0.06 17.20 2.75 0.67 0.06 17.60 2.78 0.68 0.05 18.00 2.80 0.69 0.05 18.40 2.82 0.70 0.05 18.80 2.84 0.72 0.05 19.20 2.86 0.73 0.04 19.60 2.88 0.74 0.04 20.00 2.89 0.75 0.04 20.40 2.91 0.75 0.04 Time Precip. Excess Runoff hours (inches) (inches) {cfs) 20.80 2.93 0.76 0.04 21.20 2.94 0.77 0.04 21.60 2.96 0.78 0.04 22.00 2.97 0.79 0.04 22.40 2.98 0.80 0.03 22.80 3.00 0.81 0.03 23.20 3.01 0.82 0.03 23.60 3.03 0.82 0.03 24.00 3.04 0.83 0.03 Pre Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pace 8 Summary for Subcatchment 2S: PreDev #2 Runoff = 2.84 cfs @ 12.14 hrs, Volume= 0.229 af, Depth> 0.83" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Description 0.160 98 Impervious 0.260 74 Pasture /grassland /range, Good, HSG C 2.910 70 Woods. Good. HSG C 3.330 72 Weighted Average 3.170 0.11 95.20% Pervious Area 0.160 4.80% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.7 351 Total 3 N 0 LL Subcatchment 2S: PreDev #2 Hydrograph Type II 24 -hr 1 -Year Rainfall= 3.04" Runoff Area =3.330 ac Runoff Volume = 0.229 of Runoff Depth >0.83" Flow Length =351' Tc =1 -9.7 min Time (hours) ■ Runoff Pre Type /I 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment 2S: PreDev #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.01 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.04 0.00 0.00 1.60 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.40 0.08 0.00 0.00 2.80 0.10 0.00 0.00 3.20 0.11 0.00 0.00 3.60 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.40 0.16 0.00 0.00 4.80 0.18 0.00 0.00 5.20 0.20 0.00 0.00 5.60 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.40 0.27 0.00 0.00 6.80 0.29 0.00 0.00 7.20 0.31 0.00 0.00 7.60 0.34 0.00 0.00 8.00 0.36 0.00 0.00 8.40 0.39 0.00 0.00 8.80 0.43 0.00 0.00 9.20 0.47 0.00 0.00 9.60 0.51 0.00 0.00 10.00 0.55 0.00 0.00 10.40 0.60 0.00 0.00 10.80 0.67 0.00 0.00 11.20 0.76 0.00 0.00 11.60 0.93 0.01 0.02 12.00 2.02 0.30 1.55 12.40 2.20 0.38 1.23 12.80 2.31 0.43 0.49 13.20 2.38 0.47 0.33 13.60 2.44 0.50 0.27 14.00 2.49 0.52 0.23 14.40 2.54 0.55 0.19 14.80 2.58 0.57 0.18 15.20 2.61 0.59 0.17 15.60 2.65 0.61 0.15 16.00 2.68 0.62 0.14 16.40 2.70 0.64 0.13 16.80 2.73 0.65 0.12 17.20 2.75 0.67 0.12 17.60 2.78 0.68 0.11 18.00 2.80 0.69 0.11 18.40 2.82 0.70 0.10 18.80 2.84 0.72 0.10 19.20 2.86 0.73 0.09 19.60 2.88 0.74 0.09 20.00 2.89 0.75 0.08 20.40 2.91 0.75 0.08 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 2.93 0.76 0.08 21.20 2.94 0.77 0.08 21.60 2.96 0.78 0.07 22.00 2.97 0.79 0.07 22.40 2.98 0.80 0.07 22.80 3.00 0.81 0.07 23.20 3.01 0.82 0.07 23.60 3.03 0.82 0.07 24.00 3.04 0.83 0.07 Pre Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 10 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PreDev #1 Runoff Area =1.610 ac 7.45% Impervious Runoff Depth >1.23" Flow Length =201' Tc =13.2 min CN =72 Runoff =2.67 cfs 0.166 of Subcatchment 2S: PreDev #2 Runoff Area =3.330 ac 4.80% Impervious Runoff Depth >1.23" Flow Length =351' Tc =19.7 min CN =72 Runoff =4.43 cfs 0.342 of Total Runoff Area = 4.940 ac Runoff Volume = 0.508 of Average Runoff Depth = 1.23" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADe 10.00 s/n 06538 0 2013 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1 S: PreDev #1 Runoff = 2.67 cfs @ 12.06 hrs, Volume= 0.166 af, Depth> 1.23" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover, Good, HSG C 1.610 72 Weighted Average 1.490 92.55% Pervious Area 0.120 7.45% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft) (fUsec) (cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 201 Total N 3 0 U- M Subcatchment IS: PreDev #1 Hydrograph Type 1124 -h r 2 -Year Rainfall= 3.68" Runoff Area--I-.610 ac Runoff Volume =0.166 of Runoff Depth >1.23" Flow Length =201' Tc =13.2 min CN =72 �rrrrrfsri vrrirrrrr�rii .�iirr»wr�i,.rrvri - 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2,1 Time (hours) ■ Runoff Pre Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 12 Hydrograph for Subcatchment 1S: PreDev #1 Time Precip. Excess Runoff {hours} (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.02 11.60 1.13 0.03 0.07 12.00 2.44 0.50 2.25 12.40 2.67 0.62 0.58 12.80 2.79 0.69 0.28 13.20 2.88 0.74 0.21 13.60 2.96 0.78 0.17 14.00 3.02 0.82 0.15 14.40 3.07 0.85 0.13 14.80 3.12 0.88 0.12 15.20 3.16 0.91 0.11 15.60 3.20 0.93 0.10 16.00 3.24 0.95 0.09 16.40 3.27 0.97 0.08 16.80 3.30 0.99 0.08 17.20 3.33 1.01 0.08 17.60 3.36 1.03 0.07 18.00 3.39 1.05 0.07 18.40 3.42 1.07 0.07 18.80 3.44 1.08 0.06 19.20 3.46 1.10 0.06 19.60 3.48 1.11 0.06 20.00 3.50 1.12 0.05 20.40 3.52 1.14 0.05 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.15 0.05 21.20 3.56 1.16 0.05 21.60 3.58 1.17 0.05 22.00 3.60 1.18 0.05 22.40 3.61 1.20 0.05 22.80 3.63 1.21 0.05 23.20 3.65 1.22 0.05 23.60 3.66 1.23 0.05 24.00 3.68 1.24 0.04 Pre Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Paae 13 Summary for Subcatchment 2S: PreDev #2 Runoff = 4.43 cfs @ 12.14 hrs, Volume= 0.342 af, Depth> 1.23" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Descriotion 0.160 98 Impervious 0.260 74 Pasture /grassland /range, Good, HSG C 2.910 70 Woods, Good, HSG C 3.330 72 Weighted Average 3.170 95.20% Pervious Area 0.160 251 4.80% Impervious Area Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity Description (cfs) 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 19.7 351 Total 4 3 h 3 0 LL 2 1 Subcatchment 2S: PreDev #2 Hydrograph Type II 24 -hr 2 -Year Rainfall= 3.68" Runoff Area =3.330 ad Runoff Volume =0.342` of Runoff Depth >1.23" Flow Length =351' Tc =19.7 min CN =72 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Pre Type 11 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment 2S: PreDev #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.00 0.00 11.20 0.92 0.01 0.03 11.60 1.13 0.03 0.12 12.00 2.44 0.50 2.65 12.40 2.67 0.62 1.83 12.80 2.79 0.69 0.70 13.20 2.88 0.74 0.47 13.60 2.96 0.78 0.38 14.00 3.02 0.82 0.32 14.40 3.07 0.85 0.27 14.80 3.12 0.88 0.25 15.20 3.16 0.91 0.23 15.60 3.20 0.93 0.21 16.00 3.24 0.95 0.19 16.40 3.27 0.97 0.18 16.80 3.30 0.99 0.17 17.20 3.33 1.01 0.16 17.60 3.36 1.03 0.16 18.00 3.39 1.05 0.15 18.40 3.42 1.07 0.14 18.80 3.44 1.08 0.13 19.20 3.46 1.10 0.13 19.60 3.48 1.11 0.12 20.00 3.50 1.12 0.11 20.40 3.52 1.14 0.11 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.15 0.10 21.20 3.56 1.16 0.10 21.60 3.58 1.17 010 22.00 3.60 1.18 0.10 22.40 3.61 1.20 0.10 22.80 3.63 1.21 0.10 23.20 3.65 1.22 0.10 23.60 3.66 1.23 0.09 24.00 3.68 1.24 0.09 Pre Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s!n 06538 G 2013 HydroCAD Software Solutions LLC Page 15 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PreDev #1 Runoff Area =1.610 ac 7.45% Impervious Runoff Depth >2.63" Flow Length =201' Tc =13.2 min CN =72 Runoff =5.84 cfs 0.353 of Subcatchment 2S: PreDev #2 Runoff Area =3.330 ac 4.80% Impervious Runoff Depth >2.62" Flow Length =351' Tc =19.7 min CN =72 Runoff =9.80 cfs 0.728 of Total Runoff Area = 4.940 ac Runoff Volume =1.080 of Average Runoff Depth = 2.62" 94.33% Pervious = 4.660 ac 5.67% Impervious = 0.280 ac Pre Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 (D 2013 H droCAD Software Solutions LLC Page 16 Summary for Subcatchment 1S: PreDev #1 Runoff = 5.84 cfs @ 12.05 hrs, Volume= 0.353 af, Depth> 2.63" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.120 98 Paved parking, HSG C 1.380 70 Woods, Good, HSG C 0.110 74 >75% Grass cover. Good. HSG C 1.610 72 Weighted Average 1.490 92.55% Pervious Area 0.120 7.45% Impervious Area Tc Length Slope Velocity Capacity Description mint feet ) (fUft) ft/sec cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.7 101 0.1300 2.52 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 13.2 201 Total 5 n w 0 3 LL 2 Subcatchment 1S: PreDev #1 Hydrograph C Type II 24 -hr 10- Year Rainfall= 5.56" Runoff Area =1 610 aq Runoff Volume =0.353 of Runoff Depth >2.63" Flow Length =201' Tc =13.2 min CN =72 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Runoff Pre Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 17 Hydrograph for Subcatchment 1 S: PreDev #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.02 10.00 1.01 0.01 0.03 10.40 1.11 0.03 0.05 10.80 1.23 0.05 0.09 11.20 1.40 0.09 0.15 11.60 1.71 0.18 0.31 12.00 3.69 1.24 5.13 12.40 4.03 1.48 1.15 12.80 4.22 1.62 0.54 13.20 4.36 1.72 0.41 13.60 4.47 1.80 0.33 14.00 4.56 1.86 0.27 14.40 4.64 1.92 0.24 14.80 4.71 1.98 0.22 15.20 4.78 2.03 0.20 15.60 4.84 2.07 0.19 16.00 4.89 2.12 0.17 16.40 4.94 2.15 0.16 16.80 4.99 2.19 0.15 17.20 5.04 2.23 0.14 17.60 5.08 2.26 0.14 18.00 5.12 2.29 0.13 18.40 5.16 2.32 0.12 18.80 5.20 2.35 0.12 19.20 5.23 2.38 0.11 19.60 5.26 2.40 0.10 20.00 5.29 2.43 0.10 20.40 5.32 2.45 0.09 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.47 0.09 21.20 5.38 2.49 0.09 21.60 5.41 2.51 0.09 22.00 5.43 2.54 0.09 22.40 5.46 2.56 0.09 22.80 5.48 2.58 0.08 23.20 5.51 2.60 0.08 23.60 5.54 2.62 0.08 24.00 5.56 2.64 0.08 Pre Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 18 Summary for Subcatchment 2S: PreDev #2 Runoff = 9.80 cfs @ 12.13 hrs, Volume= 0.728 af, Depth> 2.62" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall= 5.56" Area (ac) CN Description 0.160 98 Impervious 0.260 74 Pasture /grassland /range, Good, HSG C 2.910 70 Woods, Good, HSG C 3.330 72 Weighted Average 3.170 0.11 95.20% Pervious Area 0.160 4.80% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft (ft/sec ) (cfs) 15.6 100 0.0375 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 4.1 251 0.0420 1.02 Shallow Concentrated Flow, Woodland Kv= 5.0 fos 19.7 351 Total Subcatchment 2S: PreDev #2 Hydrograph ■ Runoff r. 14 Type 1 124 -h r-'. L 9 10 -Year Rainfall =5.56" 8 Runoff Area =3.330 ac Runoff Volume =0.728 of Runoff Depth >2.62" ° 5 Flow Length =351' LL 4 Tc =19.7 min 3 CN =72 2 0 1 r/./ E. r/ ���J//l J. f�/ / / /f / /.�! / ✓!!.lI.PA.�.Pfl� /.rs= - -- - - - - - -- 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Time (hours) I Pre Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 19 Hydrograph for Subcatchment 2S: PreDev #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.00 9.20 0.85 0.00 0.01 9.60 0.92 0.01 0.03 10.00 1.01 0.01 0.05 10.40 1.11 0.03 0.09 10.80 1.23 0.05 0.16 11.20 1.40 0.09 0.27 11.60 1.71 0.18 0.53 12.00 3.69 1.24 6.48 12.40 4.03 1.48 3.79 12.80 4.22 1.62 1.36 13.20 4.36 1.72 0.90 13.60 4.47 1.80 0.72 14.00 4.56 1.86 0.59 14.40 4.64 1.92 0.51 14.80 4.71 1.98 0.47 15.20 4.78 2.03 0.43 15.60 4.84 2.07 0.40 16.00 4.89 2.12 0.36 16.40 4.94 2.15 0.33 16.80 4.99 2.19 0.31 17.20 5.04 2.23 0.30 17.60 5.08 2.26 0.28 18.00 5.12 2.29 0.27 18.40 5.16 2.32 0.26 18.80 5.20 2.35 0.24 19.20 5.23 2.38 0.23 19.60 5.26 2.40 0.22 20.00 5.29 2.43 0.20 20.40 5.32 2.45 0.19 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.47 0.19 21.20 5.38 2.49 0.18 21.60 5.41 2.51 0.18 22.00 5.43 2.54 0.18 22.40 5.46 2.56 0.18 22.80 5.48 2.58 0.17 23.20 5.51 2.60 0.17 23.60 5.54 2.62 0.17 24.00 5.56 2.64 0.17 4S 2P PostDev #1 to Storage Storage ystem #3 System #3 5L / � ` 3S Outfall PostDev #1 Unrouted Reach an LICii{ Post Area #1 Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAM 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment- numbers) 0.760 74 >75% Grass cover, Good, HSG C (3S, 4S) 0.400 98 Paved parking, HSG C (3S, 4S) 0.420 70 Woods, Good, HSG C (3S) 1.580 79 TOTAL AREA Post Area #1 Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD®10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 1.580 HSG C 3S, 4S 0.000 HSG D 0.000 Other 1.580 TOTAL AREA Post Area #1 Prepared by TG- MOSYSCON H droCAD ®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Printed 6/20/2015 Pa e 4 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 0.760 0.000 0.000 0.760 >75% Grass cover, Good 3S, 4S 0.000 0.000 0.400 0.000 0.000 0.400 Paved parking 3S, 4S 0.000 0.000 0.420 0.000 0.000 0.420 Woods, Good 3S 0.000 0.000 1.580 0.000 0.000 1.580 TOTAL AREA Post Area #1 Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node In- Invert Out - Invert Length Slope n DiamMidth Height Inside -Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 454.00 453.00 30.0 0.0333 0.013 15.0 0.0 0.0 Post Area #1 Type 1124-hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 6 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area =0.970 ac 11.34% Impervious Runoff Depth >0.98" Flow Length =200' Tc =13.4 min CN =75 Runoff =1.26 cfs 0.079 of Subcatchment 4S: PostDev #1 to Storage Runoff Area =0.610 ac 47.54% Impervious Runoff Depth >1.62" Flow Length =200' Tc =9.4 min CN =85 Runoff= 1.55 cfs 0.082 of Pond 2P: Storage System #3 Peak Elev= 456.47' Storage =0.018 of Inflow =1.55 cfs 0.082 of Outflow =0.64 cfs 0.082 of Link 5L: Outfall Inflow =1.87 cfs 0.162 of Primary=1.87 cfs 0.162 of Total Runoff Area = 1.580 ac Runoff Volume = 0.162 of Average Runoff Depth = 1.23" 74.68% Pervious = 1.180 ac 25.32% Impervious = 0.400 ac Post Area #1 Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Paae 7 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 1.26 cfs @ 12.06 hrs, Volume= 0.079 af, Depth> 0.98" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Description 0.110 98 Paved parking, HSG C 0.440 74 >75% Grass cover, Good, HSG C 0.420 70 Woods, Good. HSG C 0.970 75 Weighted Average 0.860 0.13 88.66% Pervious Area 0.110 11.34% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.4 200 Total N 3 0 LL Subcatchment 3S: PostDev #1 Unrouted Hydrograph Type 1124 -h r 1 -Year Rainfall= 3.04" Runoff Area--0.970 ac Runoff Volume =0.079 of Runoff Depth >0.98" Flow Length =200' Tc =13.4' min CN =75 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 Area #1 Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.01 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.04 0.00 0.00 1.60 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.40 0.08 0.00 0.00 2.80 0.10 0.00 0.00 3.20 0.11 0.00 0.00 3.60 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.40 0.16 0.00 0.00 4.80 0.18 0.00 0.00 5.20 0.20 0.00 0.00 5.60 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.40 0.27 0.00 0.00 6.80 0.29 0.00 0.00 7.20 0.31 0.00 0.00 7.60 0.34 0.00 0.00 8.00 0.36 0.00 0.00 8.40 0.39 0.00 0.00 8.80 0.43 0.00 0.00 9.20 0.47 0.00 0.00 9.60 0.51 0.00 0.00 10.00 0.55 0.00 0.00 10.40 0.60 0.00 0.00 10.80 0.67 0.00 0.00 11.20 0.76 0.00 0.01 11.60 0.93 0.02 0.03 12.00 2.02 0.39 1.05 12.40 2.20 0.49 0.28 12.80 2.31 0.54 0.14 13.20 2.38 0.58 0.10 13.60 2.44 0.62 0.08 14.00 2.49 0.65 0.07 14.40 2.54 0.67 0.06 14.80 2.58 0.70 0.06 15.20 2.61 0.72 0.05 15.60 2.65 0.74 0.05 16.00 2.68 0.76 0.04 16.40 2.70 0.77 0.04 16.80 2.73 0.79 0.04 17.20 2.75 0.80 0.04 17.60 2.78 0.82 0.04 18.00 2.80 0.83 0.03 18.40 2.82 0.85 0.03 18.80 2.84 0.86 0.03 19.20 2.86 0.87 0.03 19.60 2.88 0.88 0.03 20.00 2.89 0.89 0.03 20.40 2.91 0.90 0.02 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 2.93 0.91 0.02 21.20 2.94 0.92 0.02 21.60 2.96 0.93 0.02 22.00 2.97 0.94 0.02 22.40 2.98 0.95 0.02 22.80 3.00 0.96 0.02 23.20 3.01 0.97 0.02 23.60 3.03 0.98 0.02 24.00 3.04 0.99 0.02 Post Area #1 Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 9 Summary for Subcatchment 4S: PostDev #1 to Storage System #3 Runoff = 1.55 cfs @ 12.01 hrs, Volume= 0.082 af, Depth> 1.62" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Descriotion 0.290 98 Paved parking, HSG C 0.320 74 >75% Grass cover, Good, HSG C 0.610 85 Weighted Average 0.320 52.46% Pervious Area 0.290 47.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet ft/ft fUsec) cfs) 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n= 0.150 P2= 3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fos 9.4 to 1 2. 0 LL � k 0 200 Total Subcatchment 4S: PostDev #1 to Storage System #3 Hydrograph Type 1 124 -h r 1 -Year Rainfall= 3.04" Runoff Area = 0.610 ao. Runoff Volume =0.082 of Runoff Depth >1.62" Flow Length =200' Tc =9.4 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 Post Area #1 Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.01 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.04 0.00 0.00 1.60 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.40 0.08 0.00 0.00 2.80 0.10 0.00 0.00 3.20 0.11 0.00 0.00 3.60 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.40 0.16 0.00 0.00 4.80 0.18 0.00 0.00 5.20 0.20 0.00 0.00 5.60 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.40 0.27 0.00 0.00 6.80 0.29 0.00 0.00 7.20 0.31 0.00 0.00 7.60 0.34 0.00 0.00 8.00 0.36 0.00 0.00 8.40 0.39 0.00 0.00 8.80 0.43 0.00 0.00 9.20 0.47 0.01 0.01 9.60 0.51 0.01 0.01 10.00 0.55 0.02 0.01 10.40 0.60 0.03 0.02 10.80 0.67 0.05 0.03 11.20 0.76 0.08 0.05 11.60 0.93 0.14 0.10 12.00 2.02 0.81 1.54 12.40 2.20 0.95 0.21 12.80 2.31 1.03 0.11 13.20 2.38 1.09 0.09 13.60 2.44 1.13 0.07 14.00 2.49 1.17 0.06 14.40 2.54 1.21 0.05 14.80 2.58 1.24 0.05 15.20 2.61 1.27 0.04 15.60 2.65 1.30 0.04 16.00 2.68 1.32 0.04 16.40 2.70 1.34 0.03 16.80 2.73 1.36 0.03 17.20 2.75 1.38 0.03 17.60 2.78 1.40 0.03 18.00 2.80 1.42 0.03 18.40 2.82 1.44 0.03 18.80 2.84 1.46 0.03 19.20 2.86 1.47 0.02 19.60 2.88 1.49 0.02 20.00 2.89 1.50 0.02 20.40 2.91 1.51 0.02 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 2.93 1.53 0.02 21.20 2.94 1.54 0.02 21.60 2.96 1.55 0.02 22.00 2.97 1.56 0.02 22.40 2.98 1.58 0.02 22.80 3.00 1.59 0.02 23.20 3.01 1.60 0.02 23.60 3.03 1.61 0.02 24.00 3.04 1.62 0.02 Post Area #1 Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 11 Summary for Pond 2P: Storage System #3 Inflow Area = 0.610 ac, 47.54% Impervious, Inflow Depth > 1.62" for 1 -Year event Inflow = 1.55 cfs @ 12.01 hrs, Volume= 0.082 of Outflow = 0.64 cfs @ 12.14 hrs, Volume= 0.082 af, Atten= 59 %, Lag= 8.0 min Primary = 0.64 cfs @ 12.14 hrs, Volume= 0.082 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Peak Elev= 456.47' @ 12.14 hrs Surf.Area= 0.010 ac Storage= 0.018 of Plug -Flow detention time= 10.0 min calculated for 0.082 of (100% of inflow) Center -of -Mass det. time= 9.0 min ( 836.0 - 827.0 ) Volume Invert Avail.Stora a Storage Description #1 454.00' 0.047 of 72.0" Round Pipe Storage L= 72.0' Device Routing Invert Outlet Devices #1 Primary 454.00' 15.0" Round Culvert L= 30.0' Ke= 0.500 Inlet/ Outlet Invert= 454.00'/ 453.00' S=0.0333'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 454.00' 4.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 456.95' 5.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 459.40' 4.0' long Sharp- Crested Rectangular Weir 2 End Contractions) 0.6' Crest Height Primary OutFlow Max =0.64 cfs @ 12.14 hrs HW= 456.47' (Free Discharge) "�-1= Culvert (Passes 0.64 cfs of 8.03 cfs potential flow) T:�Orifice /Grate (Orifice Controls 0.64 cfs @ 7.31 fps) 3tOrifice/Grate ( Controls 0.00 cfs) Sharp- Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #1 Type // 24 -hr 1 -Year Rainfall = 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Pa e 12 Pond 2P: Storage System #3 Hydrograph w v 3 0 LL 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) 460 459 456 d d w 0 457 m w 456 455 Pond 2P: Storage System #3 Stage- Discharge 7 2 3 4 5 6 7 3 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post Area #1 Type 1124 -hr 1 -Year Rainfall = 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10-00 sJn 06538 C} 2013 H droCA❑ Software Solutions LLC Page 13 m m c 0 m w Pond 2P: Storage System #3 Stage- Area - Storage 0 0.005 0.01 0.015 0.02 0.025 0.03 U.U3b U.UU U.UVo Storage (acre -feet) ■ Storage Post Area #1 Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 14 Hydrograph for Pond 2P: Storage System #3 Time Inflow Storage Elevation Primary (hours) cfs acre -feet feet cfs 0.00 0.00 0.000 454.00 0.00 1.00 0.00 0.000 454.00 0.00 2.00 0.00 0.000 454.00 0.00 3.00 0.00 0.000 454.00 0.00 4.00 0.00 0.000 454.00 0.00 5.00 0.00 0.000 454.00 0.00 6.00 0.00 0.000 454.00 0.00 7.00 0.00 0.000 454.00 0.00 8.00 0.00 0.000 454.00 0.00 9.00 0.00 0.000 454.03 0.00 10.00 0.01 0.000 454.07 0.01 11.00 0.04 0.000 454.12 0.03 12.00 1.54 0.011 455.74 0.53 13.00 0.10 0.001 454.31 0.16 14.00 0.06 0.000 454.17 0.06 15.00 0.05 0.000 454.14 0.05 16.00 0.04 0.000 454.13 0.04 17.00 0.03 0.000 454.12 0.03 18.00 0.03 0.000 454.11 0.03 19.00 0.02 0.000 454.10 0.02 20.00 0.02 0.000 454.09 0.02 21.00 0.02 0.000 454.09 0.02 22.00 0.02 0.000 454.08 0.02 23.00 0.02 0.000 454.08 0.02 24.00 0.02 0.000 454.08 0.02 Post Area #1 Type// 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 15 Elevation Primary (feet) (cfs) 454.00 0.00 454.04 0.00 454.08 0.02 454.12 0.03 454.16 0.06 454.20 0.08 454.24 0.11 454.28 0.14 454.32 0.17 454.36 0.18 454.40 0.20 454.44 0.22 454.48 0.24 454.52 0.25 454.56 0.26 454.60 0.28 454.64 0.29 454.68 0.30 454.72 0.31 454.76 0.32 454.80 0.33 454.84 0.34 454.88 0.35 454.92 0.36 454.96 0.37 455.00 0.38 455.04 0.39 455.08 0.40 455.12 0.41 455.16 0.42 455.20 0.43 455.24 0.44 455.28 0.44 455.32 0.45 455.36 0.46 455.40 0.47 455.44 0.47 455.48 0.48 455.52 0.49 455.56 0.50 455.60 0.50 455.64 0.51 455.68 0.52 455.72 0.52 455.76 0.53 455.80 0.54 455.84 0.54 455.88 0.55 455.92 0.56 455.96 0.56 456.00 0.57 456.04 0.58 Stage- Discharge for Pond 2P: Storage System #3 Elevation Primary (feet) (cfs) 456.08 0.58 456.12 0.59 456.16 0.59 456.20 0.60 456.24 0.61 456.28 0.61 456.32 0.62 456.36 0.62 456.40 0.63 456.44 0.63 456.48 0.64 456.52 0.64 456.56 0.65 456.60 0.66 456.64 0.66 456.68 0.67 456.72 0.67 456.76 0.68 456.80 0.68 456.84 0.69 456.88 0.69 456.92 0.70 456.96 0.70 457.00 0.71 457.04 0.73 457.08 0.76 457.12 0.80 457.16 0.83 457.20 0.88 457.24 0.92 457.28 0.97 457.32 1.01 457.36 1.05 457.40 1.08 457.44 1.11 457.48 1.14 457.52 1.16 457.56 1.19 457.60 1.21 457.64 1.24 457.68 1.26 457.72 1.28 457.76 1.31 457.80 1.33 457.84 1.35 457.88 1.37 457.92 1.39 457.96 1.41 458.00 1.43 458.04 1.44 458.08 1.46 458.12 1.48 Elevation Primary (feet) (cfs) 458.16 1.50 458.20 1.51 458.24 1.53 458.28 1.55 458.32 1.56 458.36 1.58 458.40 1.60 458.44 1.61 458.48 1.63 458.52 1.64 458.56 1.66 458.60 1.67 458.64 1.69 458.68 1.70 458.72 1.72 458.76 1.73 458.80 1.75 458.84 1.76 458.88 1.77 458.92 1.79 458.96 1.80 459.00 1.81 459.04 1.83 459.08 1.84 459.12 1.85 459.16 1.87 459.20 1.88 459.24 1.89 459.28 1.91 459.32 1.92 459.36 1.93 459.40 1.94 459.44 2.06 459.48 2.27 459.52 2.53 459.56 2.85 459.60 3.21 459.64 3.61 459.68 4.05 459.72 4.52 459.76 5.03 459.80 5.57 459.84 6.14 459.88 6.75 459.92 7.38 459.96 8.05 460.00 8.74 Post Area #1 Type 1124-hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 16 Stage -Area- Storage for Pond 2P: Storage System #3 Elevation Storage (feet) (acre -feet) 454.00 0.000 454.04 0.000 454.08 0.000 454.12 0.000 454.16 0.000 454.20 0.000 454.24 0.001 454.28 0.001 454.32 0.001 454.36 0.001 454.40 0.001 454.44 0.002 454.48 0.002 454.52 0.002 454.56 0.002 454.60 0.002 454.64 0.003 454.68 0.003 454.72 0.003 454.76 0.003 454.80 0.004 454.84 0.004 454.88 0.004 454.92 0.005 454.96 0.005 455.00 0.005 455.04 0.005 455.08 0.006 455.12 0.006 455.16 0.006 455.20 0.007 455.24 0.007 455.28 0.007 455.32 0.008 455.36 0.008 455.40 0.008 455.44 0.009 455.48 0.009 455.52 0.009 455.56 0.010 455.60 0.010 455.64 0.010 455.68 0.011 455.72 0.011 455.76 0.011 455.80 0.012 455.84 0.012 455.88 0.013 455.92 0.013 455.96 0.013 456.00 0.014 456.04 0.014 Elevation Storage (feet) (acre -feet) 456.08 0.014 456.12 0.015 456.16 0.015 456.20 0.016 456.24 0.016 456.28 0.016 456.32 0.017 456.36 0.017 456.40 0.017 456.44 0.018 456.48 0.018 456.52 0.019 456.56 0.019 456.60 0.019 456.64 0.020 456.68 0.020 456.72 0.021 456.76 0.021 456.80 0.021 456.84 0.022 456.88 0.022 456.92 0.023 456.96 0.023 457.00 0.023 457.04 0.024 457.08 0.024 457.12 0.025 457.16 0.025 457.20 0.025 457.24 0.026 457.28 0.026 457.32 0.027 457.36 0.027 457.40 0.027 457.44 0.028 457.48 0.028 457.52 0.028 457.56 0.029 457.60 0.029 457.64 0.030 457.68 0.030 457.72 0.030 457.76 0.031 457.80 0.031 457.84 0.032 457.88 0.032 457.92 0.032 457.96 0.033 458.00 0.033 458.04 0.033 458.08 0.034 458.12 0.034 Elevation Storage (feet) (acre -feet) 458.16 0.035 458.20 0.035 458.24 0.035 458.28 0.036 458.32 0.036 458.36 0.036 458.40 0.037 458.44 0.037 458.48 0.037 458.52 0.038 458.56 0.038 458.60 0.038 458.64 0.039 458.68 0.039 458.72 0.039 458.76 0.040 458.80 0.040 458.84 0.040 458.88 0.041 458.92 0.041 458.96 0.041 459.00 0.042 459.04 0.042 459.08 0.042 459.12 0.042 459.16 0.043 459.20 0.043 459.24 0.043 459.28 0.044 459.32 0.044 459.36 0.044 459.40 0.044 459.44 0.045 459.48 0.045 459.52 0.045 459.56 0.045 459.60 0.045 459.64 0.046 459.68 0.046 459.72 0.046 459.76 0.046 459.80 0.046 459.84 0.046 459.88 0.047 459.92 0.047 459.96 0.047 460.00 0.047 Post Area #1 Type 11 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 17 Summary for Link 5L: Outfall Inflow Area = 1.580 ac, 25.32% Impervious, Inflow Depth > 1.23" for 1 -Year event Inflow = 1.87 cfs @ 12.07 hrs, Volume= 0.162 of Primary = 1.87 cfs @ 12.07 hrs, Volume= 0.162 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs 2 N w V i 1 O LL Link 5L: Outfall Hydrograph 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) ■ Inflow ■ Primary Post Area #1 Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Paae 18 Hydrograph for Link 5L: Outfall Time Inflow Elevation Primary (hours) (cfs) [feet) (cfs) 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.00 0.00 0.00 6.80 0.00 0.00 0.00 7.20 0.00 0.00 0.00 7.60 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.40 0.00 0.00 0.00 8.80 0.00 0.00 0.00 9.20 0.01 0.00 0.01 9.60 0.01 0.00 0.01 10.00 0.01 0.00 0.01 10.40 0.02 0.00 0.02 10.80 0.03 0.00 0.03 11.20 0.05 0.00 0.05 11.60 0.11 0.00 0.11 12.00 1.57 0.00 1.57 12.40 0.83 0.00 0.83 12.80 0.44 0.00 0.44 13.20 0.20 0.00 0.20 13.60 0.16 0.00 0.16 14.00 0.13 0.00 0.13 14.40 0.12 0.00 0.12 14.80 0.11 0.00 0.11 15.20 0.10 0.00 0.10 15.60 0.09 0.00 0.09 16.00 0.08 0.00 0.08 16.40 0.08 0.00 0.08 16.80 0.07 0.00 0.07 17.20 0.07 0.00 0.07 17.60 0.07 0.00 0.07 18.00 0.06 0.00 0.06 18.40 0.06 0.00 0.06 18.80 0.06 0.00 0.06 19.20 0.05 0.00 0.05 19.60 0.05 0.00 0.05 20.00 0.05 0.00 0.05 20.40 0.04 0.00 0.04 Time Inflow Elevation Primary (hours) (,cfs)„ (feet)_ tcfs) 20.80 0.04 0.00 0.04 21.20 0.04 0.00 0.04 21.60 0.04 0.00 0.04 22.00 0.04 0.00 0.04 22.40 0.04 0.00 0.04 22.80 0.04 0.00 0.04 23.20 0.04 0.00 0.04 23.60 0.04 0.00 0.04 24.00 0.04 0.00 0.04 Post Area #1 Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Pam Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area =0.970 ac 11.34% Impervious Runoff Depth >1.42" Flow Length =200' Tc =13.4 min CN =75 Runoff =1.87 cfs 0.115 of Subcatchment 4S: PostDev #1 to Storage Runoff Area =0.610 ac 47.54% Impervious Runoff Depth >2.17" Flow Length =200' Tc =9.4 min CN =85 Runoff =2.07 cfs 0.110 of Pond 2P: Storage System #3 Peak Elev= 457.27' Storage =0.026 of Inflow =2.07 cfs 0.110 of Outflow =0.96 cfs 0.110 of Link 5L: Outfall Inflow =2.67 cfs 0.225 of Primary=2.67 cfs 0.225 of Total Runoff Area = 1.580 ac Runoff Volume = 0.225 of Average Runoff Depth =1.71" 74.68% Pervious= 1.180 ac 25.32% Impervious = 0.400 ac Post Area #1 Type // 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 N droCA❑ Software Solutions LLC Page 20 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 1.87 cfs @ 12.06 hrs, Volume= 0.115 af, Depth> 1.42" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.110 98 Paved parking, HSG C 0.440 74 >75% Grass cover, Good, HSG C 0.420 70 Woods. Good, HSG C 0.970 75 Weighted Average 0.860 88.66% Pervious Area 0.110 Woods: Light underbrush n= 0.400 P2= 3.68" 11.34% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) ft/ft (ft/sec) (cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.4 200 Total 21 N LL Subcatchment 3S: PostDev #1 Unrouted Hydrograph Type 1124 -h r. 2 -Year Rainfall= 3.68" Runoff Area-0.970 ac. Runoff Vol u me: = 0.115 of Runoff Depth >1.42" Flow Le ngth =200' Tc =13.4 min CN =75 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 Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 21 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.00 0.00 8.80 0.52 0.00 0.00 9.20 0.56 0.00 0.00 9.60 0.61 0.00 0.00 10.00 0.67 0.00 0.00 10.40 0.73 0.00 0.00 10.80 0.81 0.01 0.01 11.20 0.92 0.02 0.03 11.60 1.13 0.06 0.07 12.00 2.44 0.62 1.59 12.40 2.67 0.75 0.40 12.80 2.79 0.83 0.19 13.20 2.88 0.89 0.14 13.60 2.96 0.93 0.12 14.00 3.02 0.97 0.10 14.40 3.07 1.01 0.08 14.80 3.12 1.04 0.08 15.20 3.16 1.07 0.07 15.60 3.20 1.10 0.07 16.00 3.24 1.12 0.06 16.40 3.27 1.14 0.06 16.80 3.30 1.16 0.05 17.20 3.33 1.19 0.05 17.60 3.36 1.21 0.05 18.00 3.39 1.22 0.05 18.40 3.42 1.24 0.04 18.80 3.44 1.26 0.04 19.20 3.46 1.28 0.04 19.60 3.48 1.29 0.04 20.00 3.50 1.30 0.03 20.40 3.52 1.32 0.03 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 1.33 0.03 21.20 3.56 1.34 0.03 21.60 3.58 1.36 0.03 22.00 3.60 1.37 0.03 22.40 3.61 1.38 0.03 22.80 3.63 1.39 0.03 23.20 3.65 1.41 0.03 23.60 3.66 1.42 0.03 24.00 3.68 1.43 0.03 Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 22 Summary for Subcatchment 4S: PostDev #1 to Storage System #3 Runoff = 2.07 cfs @ 12.01 hrs, Volume= 0.110 af, Depth> 2.17" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.290 98 Paved parking, HSG C 0.320 74 >75% Grass cover. Good. HSG C 0.610 85 Weighted Average 0.320 52.46% Pervious Area 0.290 47.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) feed ft/ft (ft/sec ) (cfs 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n=0.150 P2=3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4 200 Total 2 Vl 3 0 L , Subcatchment 4S: PostDev #1 to Storage System #3 Hydrograph Type II 24 -hr 2 -Year Rainfal1= 168" Runoff Area =0.610 ac. Runoff Volume =0.110 of Runoff Depth >2.17" Flow Length =200' Tc =9.4 min CN =85 Time (hours) ® Runoff Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 23 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #3 Time Precip. Excess Runoff hours (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.03 0.00 0.00 1.20 0.05 0.00 0.00 1.60 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.40 0.10 0.00 0.00 2.80 0.12 0.00 0.00 3.20 0.14 0.00 0.00 3.60 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.40 0.20 0.00 0.00 4.80 0.22 0.00 0.00 5.20 0.24 0.00 0.00 5.60 0.27 0.00 0.00 6.00 0.29 0.00 0.00 6.40 0.32 0.00 0.00 6.80 0.35 0.00 0.00 7.20 0.38 0.00 0.00 7.60 0.41 0.00 0.00 8.00 0.44 0.00 0.00 8.40 0.48 0.01 0.01 8.80 0.52 0.01 0.01 9.20 0.56 0.02 0.01 9.60 0.61 0.03 0.02 10.00 0.67 0.05 0.02 10.40 0.73 0.07 0.03 10.80 0.81 0.10 0.05 11.20 0.92 0.14 0.07 11.60 1.13 0.24 0.14 12.00 2.44 1.13 2.06 12.40 2.67 1.31 0.27 12.80 2.79 1.42 0.15 13.20 2.88 1.49 0.11 13.60 2.96 1.55 0.09 14.00 3.02 1.60 0.08 14.40 3.07 1.65 0.07 14.80 3.12 1.69 0.06 15.20 3.16 1.73 0.06 15.60 3.20 1.76 0.05 16.00 3.24 1.79 0.05 16.40 3.27 1.82 0.04 16.80 3.30 1.85 0.04 17.20 3.33 1.87 0.04 17.60 3.36 1.90 0.04 18.00 3.39 1.92 0.04 18.40 3.42 1.94 0.03 18.80 3.44 1.96 0.03 19.20 3.46 1.98 0.03 19.60 3.48 2.00 0.03 20.00 3.50 2.02 0.03 20.40 3.52 2.04 0.03 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 3.54 2.05 0.03 21.20 3.56 2.07 0.02 21.60 3.58 2.08 0.02 22.00 3.60 2.10 0.02 22.40 3.61 2.12 0.02 22.80 3.63 2.13 0.02 23.20 3.65 2.14 0.02 23.60 3.66 2.16 0.02 24.00 3.68 2.17 0.02 Post Area #1 Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 24 Summary for Pond 2P: Storage System #3 Inflow Area = 0.610 ac, 47.54% Impervious, Inflow Depth > 2.17" for 2 -Year event Inflow = 2.07 cfs @ 12.01 hrs, Volume= 0.110 of Outflow = 0.96 cfs @ 12.13 hrs, Volume= 0.110 af, Atten= 54 %, Lag= 7.3 min Primary = 0.96 cfs @ 12.13 hrs, Volume= 0.110 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Peak Elev= 457.27' @ 12.13 hrs Surf.Area= 0.010 ac Storage= 0.026 of Plug -Flow detention time= 11.6 min calculated for 0.110 of (100% of inflow) Center -of -Mass det. time= 10.7 min ( 829.4 - 818.7 ) Volume Invert Avail.Stora a Storage Description #1 454.00' 0.047 of 72.0" Round Pipe Storage L= 72.0' Device Routing Invert Outlet Devices #1 Primary 454.00' 15.0" Round Culvert L= 30.0' Ke= 0.500 Inlet/ Outlet Invert= 454.00'/453.00' S=0.0333'/' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 454.00' 4.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 456.95' 5.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 459.40' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 0.6' Crest Height Primary OutFlow Max =0.95 cfs @ 12.13 hrs HW= 457.27' (Free Discharge) L 1=Culvert (Passes 0.95 cfs of 9.61 cfs potential flow) P4=Sharp-C =Orifice /Gr ate (Orifice Controls 0.74 cfs @ 8.48 fps) = Orifce /Grate (Orifice Controls 0.21 cfs @ 1.92 fps) rested Rectangular Weir ( Controls 0.00 cfs) Post Area #1 Type // 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 25 Pond 2P: Storage System #3 Hydrograph w 3 0 LL Inflow Area =0.6 0 a 2 Peak Elev= 457.27 Storage --0.026 of . . 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) 1.160 459 458 d w `0 457 d w 456 x:55 454 0 Pond 2P: Storage System #3 Stage- Discharge i 2 3 4 5 6 7 8 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 26 '160 459 458 as w 0 457 d w 456 455 454 Pond 2P: Storage System #3 Stage- Area - Storage 0 0.005 0.01 0.015 0.02 0.025 003 0.035 0.04 0.045 Storage (acre -feet) I Storage Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 27 Hydrograph for Pond 2P: Storage System #3 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 454.00 0.00 1.00 0.00 0.000 454.00 0.00 2.00 0.00 0.000 454.00 0.00 3.00 0.00 0.000 454.00 0.00 4.00 0.00 0.000 454.00 0.00 5.00 0.00 0.000 454.00 0.00 6.00 0.00 0.000 454.00 0.00 7.00 0.00 0.000 454.00 0.00 8.00 0.00 0.000 454.02 0.00 9.00 0.01 0.000 454.07 0.01 10.00 0.02 0.000 454.09 0.02 11.00 0.06 0.000 454.15 0.05 12.00 2.06 0.017 456.33 0.62 13.00 0.13 0.003 454.73 0.32 14.00 0.08 0.000 454.19 0.08 15.00 0.06 0.000 454.16 0.06 16.00 0.05 0.000 454.14 0.05 17.00 0.04 0.000 454.13 0.04 18.00 0.04 0.000 454.12 0.04 19.00 0.03 0.000 454.12 0.03 20.00 0.03 0.000 454.10 0.03 21.00 0.02 0.000 454.10 0.02 22.00 0.02 0.000 454.10 0.02 23.00 0.02 0.000 454.09 0.02 24.00 0.02 0.000 454.09 0.02 Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pa a 28 Elevation Primary (feet) (cfs 454.00 0.00 454.04 0.00 454.08 0.02 454.12 0.03 454.16 0.06 454.20 0.08 454.24 0.11 454.28 0.14 454.32 0.17 454.36 0.18 454.40 0.20 454.44 0.22 454.48 0.24 454.52 0.25 454.56 0.26 454.60 0.28 454.64 0.29 454.68 0.30 454.72 0.31 454.76 0.32 454.80 0.33 454.84 0.34 454.88 0.35 454.92 0.36 454.96 0.37 455.00 0.38 455.04 0.39 455.08 0.40 455.12 0.41 455.16 0.42 455.20 0.43 455.24 0.44 455.28 0.44 455.32 0.45 455.36 0.46 455.40 0.47 455.44 0.47 455.48 0.48 455.52 0.49 455.56 0.50 455.60 0.50 455.64 0.51 455.68 0.52 455.72 0.52 455.76 0.53 455.80 0.54 455.84 0.54 455.88 0.55 455.92 0.56 455.96 0.56 456.00 0.57 456.04 0.58 Stage- Discharge for Pond 2P: Storage System #3 Elevation Primary _(feet) (cfs) 456.08 0.58 456.12 0.59 456.16 0.59 456.20 0.60 456.24 0.61 456.28 0.61 456.32 0.62 456.36 0.62 456.40 0.63 456.44 0.63 456.48 0.64 456.52 0.64 456.56 0.65 456.60 0.66 456.64 0.66 456.68 0.67 456.72 0.67 456.76 0.68 456.80 0.68 456.84 0.69 456.88 0.69 456.92 0.70 456.96 0.70 457.00 0.71 457.04 0.73 457.08 0.76 457.12 0.80 457.16 0.83 457.20 0.88 457.24 0.92 457.28 0.97 457.32 1.01 457.36 1.05 457.40 1.08 457.44 1.11 457.48 114 457.52 1.16 457.56 1.19 457.60 1.21 457.64 1.24 457.68 1.26 457.72 1.28 457.76 1.31 457.80 1.33 457.84 1.35 457.88 1.37 457.92 1.39 457.96 1.41 458.00 1.43 458.04 1.44 458.08 1.46 458.12 1.48 Elevation Primary (feet) _ (cfs) 458.16 1.50 458.20 1.51 458.24 1.53 458.28 1.55 458.32 1.56 458.36 1.58 458.40 1.60 458.44 1.61 458.48 1.63 458.52 1.64 458.56 1.66 458.60 1.67 458.64 1.69 458.68 1.70 458.72 1.72 458.76 1.73 458.80 1.75 458.84 1.76 458.88 1.77 458.92 1.79 458.96 1.80 459.00 1.81 459.04 1.83 459.08 1.84 459.12 1.85 459.16 1.87 459.20 1.88 459.24 1.89 459.28 1.91 459.32 1.92 459.36 1.93 459.40 1.94 459.44 2.06 459.48 2.27 459.52 2.53 459.56 2.85 459.60 3.21 459.64 3.61 459.68 4.05 459.72 4.52 459.76 5.03 459.80 5.57 459.84 6.14 459.88 6.75 459.92 7.38 459.96 8.05 460.00 8.74 Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 29 Stage -Area- Storage for Pond 2P: Storage System #3 Elevation Storage (feet) (acre -feet) 454.00 0.000 454.04 0.000 454.08 0.000 454.12 0.000 454.16 0.000 454.20 0.000 454.24 0.001 454.28 0.001 454.32 0.001 454.36 0.001 454.40 0.001 454.44 0.002 454.48 0.002 454.52 0.002 454.56 0.002 454.60 0.002 454.64 0.003 454.68 0.003 454.72 0.003 454.76 0.003 454.80 0.004 454.84 0.004 454.88 0.004 454.92 0.005 454.96 0.005 455.00 0.005 455.04 0.005 455.08 0.006 455.12 0.006 455.16 0.006 455.20 0.007 455.24 0.007 455.28 0.007 455.32 0.008 455.36 0.008 455.40 0.008 455.44 0.009 455.48 0.009 455.52 0.009 455.56 0.010 455.60 0.010 455.64 0.010 455.68 0.011 455.72 0.011 455.76 0.011 455.80 0.012 455.84 0.012 455.88 0.013 455.92 0.013 455.96 0.013 456.00 0.014 456.04 0.014 Elevation Storage (feet) (acre -feet) 456.08 0.014 456.12 0.015 456.16 0.015 456.20 0.016 456.24 0.016 456.28 0.016 456.32 0.017 456.36 0.017 456.40 0.017 456.44 0.018 456.48 0.018 456.52 0.019 456.56 0.019 456.60 0.019 456.64 0.020 456.68 0.020 456.72 0.021 456.76 0.021 456.80 0.021 456.84 0.022 456.88 0.022 456.92 0.023 456.96 0.023 457.00 0.023 457.04 0.024 457.08 0.024 457.12 0.025 457.16 0.025 457.20 0.025 457.24 0.026 457.28 0.026 457.32 0.027 457.36 0.027 457.40 0.027 457.44 0.028 457.48 0.028 457.52 0.028 457.56 0.029 457.60 0.029 457.64 0.030 457.68 0.030 457.72 0.030 457.76 0.031 457.80 0.031 457.84 0.032 457.88 0.032 457.92 0.032 457.96 0.033 458.00 0.033 458.04 0.033 458.08 0.034 458.12 0.034 Elevation Storage (feet) (acre -feet) 458.16 0.035 458.20 0.035 458.24 0.035 458.28 0.036 458.32 0.036 458.36 0.036 458.40 0.037 458.44 0.037 458.48 0.037 458.52 0.038 458.56 0.038 458.60 0.038 458.64 0.039 458.68 0.039 458.72 0.039 458.76 0.040 458.80 0.040 458.84 0.040 458.88 0.041 458.92 0.041 458.96 0.041 459.00 0.042 459.04 0.042 459.08 0.042 459.12 0.042 459.16 0.043 459.20 0.043 459.24 0.043 459.28 0.044 459.32 0.044 459.36 0.044 459.40 0.044 459.44 0.045 459.48 0.045 459.52 0.045 459.56 0.045 459.60 0.045 459.64 0.046 459.68 0.046 459.72 0.046 459.76 0.046 459.80 0.046 459.84 0.046 459.88 0.047 459.92 0.047 459.96 0.047 460.00 0.047 Post Area #1 Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 30 Summary for Link 5L: Outfall Inflow Area = 1.580 ac, 25.32% Impervious, Inflow Depth > 1.71" for 2 -Year event Inflow = 2.67 cfs @ 12.09 hrs, Volume= 0.225 of Primary = 2.67 cfs @ 12.09 hrs, Volume= 0.225 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs H w V 3 O LL Link 5L: Outfall Hydrograph 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) FE-1 n-fi ■ Primary Post Area #1 Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 31 Hydrograph for Link 5L: Ouffall Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.00 0.00 0.00 6.80 0.00 0.00 0.00 7.20 0.00 0.00 0.00 7.60 0.00 0.00 0.00 8.00 0.00 0.00 0.00 8.40 0.01 0.00 0.01 8.80 0.01 0.00 0.01 9.20 0.01 0.00 0.01 9.60 0.02 0.00 0.02 10.00 0.02 0.00 0.02 10.40 0.03 0.00 0.03 10.80 0.06 0.00 0.06 11.20 0.10 0.00 0.10 11.60 0.19 0.00 0.19 12.00 2.21 0.00 2.21 12.40 1.05 0.00 1.05 12.80 0.63 0.00 0.63 13.20 0.32 0.00 0.32 13.60 0.21 0.00 0.21 14.00 0.17 0.00 0.17 14.40 0.15 0.00 0.15 14.80 0.14 0.00 0.14 15.20 0.13 0.00 0.13 15.60 0.12 0.00 0.12 16.00 0.11 0.00 0.11 16.40 0.10 0.00 0.10 16.80 0.10 0.00 0.10 17.20 0.09 0.00 0.09 17.60 0.09 0.00 0.09 18.00 0.08 0.00 0.08 18.40 0.08 0.00 0.08 18.80 0.07 0.00 0.07 19.20 0.07 0.00 0.07 19.60 0.07 0.00 0.07 20.00 0.06 0.00 0.06 20.40 0.06 0.00 0.06 Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 20.80 0.06 0.00 0.06 21.20 0.06 0.00 0.06 21.60 0.06 0.00 0.06 22.00 0.06 0.00 0.06 22.40 0.05 0.00 0.05 22.80 0.05 0.00 0.05 23.20 0.05 0.00 0.05 23.60 0.05 0.00 0.05 24.00 0.05 0.00 0.05 Post Area #1 Type // 24 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 32 Time span =0.00 -24.00 hrs, dt =0.02 hrs, 1201 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 3S: PostDev #1 Unrouted Runoff Area =0.970 ac 11.34% Impervious Runoff Depth >2.90" Flow Length =200' Tc =13.4 min CN =75 Runoff =3.86 cfs 0.234 of Subcatchment 4S: PostDev #1 to Storage Runoff Area =0.610 ac 47.54% Impervious Runoff Depth >3.88" Flow Length =200' Tc =9.4 min CN =85 Runoff =3.61 cfs 0.197 of Pond 2P: Storage System #3 Peak Elev= 459.47' Storage =0.045 of Inflow =3.61 cfs 0.197 of Outflow =2.18 cfs 0.197 of Link 5L: Outfall Inflow =5.72 cfs 0.432 of Primary=5.72 cfs 0.432 of Total Runoff Area = 1.580 ac Runoff Volume = 0.432 of Average Runoff Depth = 3.28" 74.68% Pervious =1.180 ac 25.32% Impervious = 0.400 ac Post Area #1 Type 1124-hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCADO 10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Page 33 Summary for Subcatchment 3S: PostDev #1 Unrouted Runoff = 3.86 cfs @ 12.05 hrs, Volume= 0.234 af, Depth> 2.90" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.110 98 Paved parking, HSG C 0.440 74 >75% Grass cover, Good, HSG C 0.420 70 Woods, Good, HSG C 0.970 75 Weighted Average 0.860 88.66% Pervious Area 0.110 0.9 100 11.34% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft (ft/sec ) (cfs 12.5 100 0.0650 0.13 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 0.9 100 0.1300 1.80 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 13.4 200 Total Subcatchment 3S: PostDev #1 Unrouted Hydrograph ■ Runoff eo Ul 0 2 LL Type 11 24-hr 40 -Year Rai nfall= 5.56" Runoff Area =0.970 ac Runoff Volume =0.234 of Runoff Depth >2.90" Flow Length =200' Tc =13.4 min CN =75 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Area #1 Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 34 Hydrograph for Subcatchment 3S: PostDev #1 Unrouted Time Precip. Excess Runoff hours inches inches (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.00 0.00 6.80 0.53 0.00 0.00 7.20 0.57 0.00 0.00 7.60 0.62 0.00 0.00 8.00 0.67 0.00 0.00 8.40 0.72 0.00 0.00 8.80 0.78 0.00 0.01 9.20 0.85 0.01 0.01 9.60 0.92 0.02 0.02 10.00 1.01 0.03 0.03 10.40 1.11 0.05 0.05 10.80 1.23 0.08 0.07 11.20 1.40 0.13 0.12 11.60 1.71 0.25 0.23 12.00 3.69 1.44 3.40 12.40 4.03 1.69 0.76 12.80 4.22 1.83 0.35 13.20 4.36 1.94 0.26 13.60 4.47 2.03 0.21 14.00 4.56 2.10 0.18 14.40 4.64 2.16 0.15 14.80 4.71 2.22 0.14 15.20 4.78 2.27 0.13 15.60 4.84 2.32 0.12 16.00 4.89 2.36 0.11 16.40 4.94 2.40 0.10 16.80 4.99 2.44 0.09 17.20 5.04 2.48 0.09 17.60 5.08 2.51 0.09 18.00 5.12 2.55 0.08 18.40 5.16 2.58 0.08 18.80 5.20 2.61 0.07 19.20 5.23 2.64 0.07 19.60 5.26 2.66 0.06 20.00 5.29 2.69 0.06 20.40 5.32 2.71 0.06 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 20.80 5.35 2.74 0.06 21.20 5.38 2.76 0.06 21.60 5.41 2.78 0.06 22.00 5.43 2.80 0.05 22.40 5.46 2.83 0.05 22.80 5.48 2.85 0.05 23.20 5.51 2.87 0.05 23.60 5.54 2.89 0.05 24.00 5.56 2.91 0.05 Post Area #1 Type // 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 35 Summary for Subcatchment 4S: PostDev #1 to Storage System #3 Runoff = 3.61 cfs @ 12.01 hrs, Volume= 0.197 af, Depth> 3.88" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Descriotion 0.290 98 Paved parking, HSG C 0.320 74 >75% Grass cover. Good, HSG C 0.610 85 Weighted Average 0.320 52.46% Pervious Area 0.290 47.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) feet ft/ft) (ft/sec) (cfs) 9.1 100 0.0200 0.18 Sheet Flow, Grass: Short n=0.150 P2=3.68" 0.3 100 0.0750 5.56 Shallow Concentrated Flow, Paved Kv= 20.3 fps 9.4 4 N w 3 2 0 LL 0 200 Total Subcatchment 4S: PostDev #1 to Storage System #3 Hydrograph Type II 24 -hr 10 -Year Rainfa11 =5.56" Runoff Area =0.610 ac. Runoff Volume= 0.197' of Runoff Depth >3.88" Flow Length =200' Tc =9.4 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 Post Area #1 Type 1124 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 36 Hydrograph for Subcatchment 4S: PostDev #1 to Storage System #3 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.40 0.02 0.00 0.00 0.80 0.05 0.00 0.00 1.20 0.07 0.00 0.00 1.60 0.10 0.00 0.00 2.00 0.12 0.00 0.00 2.40 0.15 0.00 0.00 2.80 0.18 0.00 0.00 3.20 0.21 0.00 0.00 3.60 0.24 0.00 0.00 4.00 0.27 0.00 0.00 4.40 0.30 0.00 0.00 4.80 0.33 0.00 0.00 5.20 0.37 0.00 0.00 5.60 0.41 0.00 0.00 6.00 0.44 0.00 0.00 6.40 0.49 0.01 0.01 6.80 0.53 0.02 0.01 7.20 0.57 0.02 0.01 7.60 0.62 0.03 0.02 8.00 0.67 0.05 0.02 8.40 0.72 0.06 0.03 8.80 0.78 0.08 0.03 9.20 0.85 0.11 0.04 9.60 0.92 0.14 0.05 10.00 1.01 0.18 0.06 10.40 1.11 0.23 0.08 10.80 1.23 0.29 0.11 11.20 1.40 0.39 0.16 11.60 1.71 0.59 0.29 12.00 3.69 2.18 3.60 12.40 4.03 2.49 0.45 12.80 4.22 2.65 0.24 13.20 4.36 2.78 0.18 13.60 4.47 2.88 0.15 14.00 4.56 2.96 0.12 14.40 4.64 3.04 0.11 14.80 4.71 3.10 0.10 15.20 4.78 3.16 0.09 15.60 4.84 3.22 0.08 16.00 4.89 3.27 0.08 16.40 4.94 3.32 0.07 16.80 4.99 3.36 0.07 17.20 5.04 3.40 0.06 17.60 5.08 3.44 0.06 18.00 5.12 3.48 0.06 18.40 5.16 3.52 0.06 18.80 5.20 3.55 0.05 19.20 5.23 3.58 0.05 19.60 5.26 3.61 0.05 20.00 5.29 3.64 0.04 20.40 5.32 3.67 0.04 Time Precip. Excess Runoff (hours) (inches) (inches) (Cfs) 20.80 5.35 3.69 0.04 21.20 5.38 3.72 0.04 21.60 5.41 3.74 0.04 22.00 5.43 3.77 0.04 22.40 5.46 3.79 0.04 22.80 5.48 3.82 0.04 23.20 5.51 3.84 0.04 23.60 5.54 3.87 0.04 24.00 5.56 3.89 0.04 Post Area #1 Type l/ 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 37 Summary for Pond 2P: Storage System #3 Inflow Area = 0.610 ac, 47.54% Impervious, Inflow Depth > 3.88" for 10 -Year event Inflow = 3.61 cfs @ 12.01 hrs, Volume= 0.197 of Outflow = 2.18 cfs @ 12.10 hrs, Volume= 0.197 af, Atten= 40 %, Lag= 5.8 min Primary = 2.18 cfs @ 12.10 hrs, Volume= 0.197 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs Peak Elev= 459.47' @ 12.10 hrs Surf.Area= 0.006 ac Storage= 0.045 of Plug -Flow detention time= 11.6 min calculated for 0.197 of (100% of inflow) Center -of -Mass det. time= 10.9 min ( 813.1 - 802.2 ) Volume Invert Avail.Storage Storage Description #1 454.00' 0.047 of 72.0" Round Pipe Storage L= 72.0' Device Routing Invert Outlet Devices #1 Prima 454.00' _ 15.0" Round ound Culvert L= 30.0' Ke= 0.500 Inlet / Outlet Invert= 454.00'/ 453.00' S= 0.03337' Cc= 0.900 n= 0.013, Flow Area= 1.23 sf #2 Device 1 454.00' 4.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 456.95' 5.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 459.40' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 0.6' Crest Height Primary OutFlow Max =2.15 cfs @ 12.10 hrs HW= 459.46' (Free Discharge) 't-1= Culvert (Passes 2.15 cfs of 12.99 cfs potential flow) 2= Orifice /Grate (Orifice Controls 0.97 cfs @ 11.08 fps) 3= Orifce /Grate (Orifice Controls 1.00 cfs @ 7.30 fps) 4= Sharp- Crested Rectangular Weir (Weir Controls 0.18 cfs @ 0.80 fps) Post Area #1 Type 1124 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 38 Pond 2P: Storage System #3 Hydrograph 4 3 w v 3 2 0 LL C 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) 4.60 459 458 m m w 0 457 m w 456 455 454 0 Pond 2P: Storage System #3 Stage- Discharge 1 2 3 4 5 6 7 8 Discharge (cfs) ■ Inflow ■ Primary � Primary Post Area #1 Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 39 160 n50 •158 d d w 0 457 d w 456 455 .n Pond 2P: Storage System #3 Stage- Area - Storage 0 0.005 0.01 0 015 0.02 0.025 0.03 0.035 0.04 0.045 Storage (acre -feet) ■ Storage Post Area #1 Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 40 Hydrograph for Pond 2P: Storage System #3 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 454.00 0.00 1.00 0.00 0.000 454.00 0.00 2.00 0.00 0.000 454.00 0.00 3.00 0.00 0.000 454.00 0.00 4.00 0.00 0.000 454.00 0.00 5.00 0.00 0.000 454.00 0.00 6.00 0.00 0.000 454.03 0.00 7.00 0.01 0.000 454.07 0.01 8.00 0.02 0.000 454.09 0.02 9.00 0.04 0.000 454.12 0.04 10.00 0.06 0.000 454.16 0.06 11.00 0.13 0.001 454.25 0.12 12.00 3.60 0.034 458.08 1.46 13.00 0.21 0.009 455.53 0.49 14.00 0.12 0.001 454.26 0.13 15.00 0.10 0.001 454.22 0.10 16.00 0.08 0.000 454.19 0.08 17.00 0.07 0.000 454.17 0.07 18.00 0.06 0.000 454.16 0.06 19.00 0.05 0.000 454.15 0.05 20.00 0.04 0.000 454.14 0.04 21.00 0.04 0.000 454.13 0.04 22.00 0.04 0.000 454.13 0.04 23.00 0.04 0.000 454.13 0.04 24.00 0.04 0.000 454.12 0.04 Post Area #1 Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 41 Elevation Primary (feet) (cfs) 454.00 0.00 454.04 0.00 454.08 0.02 454.12 0.03 454.16 0.06 454.20 0.08 454.24 0.11 454.28 0.14 454.32 0.17 454.36 0.18 454.40 0.20 454.44 0.22 454.48 0.24 454.52 0.25 454.56 0.26 454.60 0.28 454.64 0.29 454.68 0.30 454.72 0.31 454.76 0.32 454.80 0.33 454.84 0.34 454.88 0.35 454.92 0.36 454.96 0.37 455.00 0.38 455.04 0.39 455.08 0.40 455.12 0.41 455.16 0.42 455.20 0.43 455.24 0.44 455.28 0.44 455.32 0.45 455.36 0.46 455.40 0.47 455.44 0.47 455.48 0.48 455.52 0.49 455.56 0.50 455.60 0.50 455.64 0.51 455.68 0.52 455.72 0.52 455.76 0.53 455.80 0.54 455.84 0.54 455.88 0.55 455.92 0.56 455.96 0.56 456.00 0.57 456.04 0.58 Stage- Discharge for Pond 2P: Storage System #3 Elevation Primary (feet) (cfs) 456.08 0.58 456.12 0.59 456.16 0.59 456.20 0.60 456.24 0.61 456.28 0.61 456.32 0.62 456.36 0.62 456.40 0.63 456.44 0.63 456.48 0.64 456.52 0.64 456.56 0.65 456.60 0.66 456.64 0.66 456.68 0.67 456.72 0.67 456.76 0.68 456.80 0.68 456.84 0.69 456.88 0.69 456.92 0.70 456.96 0.70 457.00 0.71 457.04 0.73 457.08 0.76 457.12 0.80 457.16 0.83 457.20 0.88 457.24 0.92 457.28 0.97 457.32 1.01 457.36 1.05 457.40 1.08 457.44 1.11 457.48 1.14 457.52 1.16 457.56 1.19 457.60 1.21 457.64 1.24 457.68 1.26 457.72 1.28 457.76 1.31 457.80 1.33 457.84 1.35 457.88 1.37 457.92 1.39 457.96 1.41 458.00 1.43 458.04 1.44 458.08 1.46 458.12 1.48 Elevation Primary (feet) cfs 458.16 1.50 458.20 1.51 458.24 1.53 458.28 1.55 458.32 1.56 458.36 1.58 458.40 1.60 458.44 1.61 458.48 1.63 458.52 1.64 458.56 1.66 458.60 1.67 458.64 1.69 458.68 1.70 458.72 1.72 458.76 1.73 458.80 1.75 458.84 1.76 458.88 1.77 458.92 1.79 458.96 1.80 459.00 1.81 459.04 1.83 459.08 1.84 459.12 1.85 459.16 1.87 459.20 1.88 459.24 1.89 459.28 1.91 459.32 1.92 459.36 1.93 459.40 1.94 459.44 2.06 459.48 2.27 459.52 2.53 459.56 2.85 459.60 3.21 459.64 3.61 459.68 4.05 459.72 4.52 459.76 5.03 459.80 5.57 459.84 6.14 459.88 6.75 459.92 7.38 459.96 8.05 460.00 8.74 Post Area #1 Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H rlroCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 42 Stage -Area- Storage for Pond 2P: Storage System #3 Elevation Storage (feet) (acre -feet) 454.00 0.000 454.04 0.000 454.08 0.000 454.12 0.000 454.16 0.000 454.20 0.000 454.24 0.001 454.28 0.001 454.32 0.001 454.36 0.001 454.40 0.001 454.44 0.002 454.48 0.002 454.52 0.002 454.56 0.002 454.60 0.002 454.64 0.003 454.68 0.003 454.72 0.003 454.76 0.003 454.80 0.004 454.84 0.004 454.88 0.004 454.92 0.005 454.96 0.005 455.00 0.005 455.04 0.005 455.08 0.006 455.12 0.006 455.16 0.006 455.20 0.007 455.24 0.007 455.28 0.007 455.32 0.008 455.36 0.008 455.40 0.008 455.44 0.009 455.48 0.009 455.52 0.009 455.56 0.010 455.60 0.010 455.64 0.010 455.68 0.011 455.72 0.011 455.76 0.011 455.80 0.012 455.84 0.012 455.88 0.013 455.92 0.013 455.96 0.013 456.00 0.014 456.04 0.014 Elevation Storage (feet) (acre -feet) 456.08 0.014 456.12 0.015 456.16 0.015 456.20 0.016 456.24 0.016 456.28 0.016 456.32 0.017 456.36 0.017 456.40 0.017 456.44 0.018 456.48 0.018 456.52 0.019 456.56 0.019 456.60 0.019 456.64 0.020 456.68 0.020 456.72 0.021 456.76 0.021 456.80 0.021 456.84 0.022 456.88 0.022 456.92 0.023 456.96 0.023 457.00 0.023 457.04 0.024 457.08 0.024 457.12 0.025 457.16 0.025 457.20 0.025 457.24 0.026 457.28 0.026 457.32 0.027 457.36 0.027 457.40 0.027 457.44 0.028 457.48 0.028 457.52 0.028 457.56 0.029 457.60 0.029 457.64 0.030 457.68 0.030 457.72 0.030 457.76 0.031 457.80 0.031 457.84 0.032 457.88 0.032 457.92 0.032 457.96 0.033 458.00 0.033 458.04 0.033 458.08 0.034 458.12 0.034 Elevation Storage (feet) (acre -feet) 458.16 0.035 458.20 0.035 458.24 0.035 458.28 0.036 458.32 0.036 458.36 0.036 458.40 0.037 458.44 0.037 458.48 0.037 458.52 0.038 458.56 0.038 458.60 0.038 458.64 0.039 458.68 0.039 458.72 0.039 458.76 0.040 458.80 0.040 458.84 0.040 458.88 0.041 458.92 0.041 458.96 0.041 459.00 0.042 459.04 0.042 459.08 0.042 459.12 0.042 459.16 0.043 459.20 0.043 459.24 0.043 459.28 0.044 459.32 0.044 459.36 0.044 459.40 0.044 459.44 0.045 459.48 0.045 459.52 0.045 459.56 0.045 459.60 0.045 459.64 0.046 459.68 0.046 459.72 0.046 459.76 0.046 459.80 0.046 459.84 0.046 459.88 0.047 459.92 0.047 459.96 0.047 460.00 0.047 Post Area #1 Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 43 Summary for Link 5L: Outfall Inflow Area = 1.580 ac, 25.32% Impervious, Inflow Depth > 3.28" for 10 -Year event Inflow = 5.72 cfs @ 12.10 hrs, Volume= 0.432 of Primary = 5.72 cfs @ 12.10 hrs, Volume= 0.432 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.02 hrs fl 5 4 V! w V 3 3 O LL 2 1 0 0 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 16 19 20 21 22 23 24 Time (hours) Link 5L: Outfall Hydrograph ■ Inflow ■ Primary Post Area #1 Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 44 Hydrograph for Link 5L: Outfall Time Inflow Elevation Primary hours ) (cfs) (feet cfs 0.00 0.00 0.00 0.00 0.40 0.00 0.00 0.00 0.80 0.00 0.00 0.00 1.20 0.00 0.00 0.00 1.60 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.40 0.00 0.00 0.00 2.80 0.00 0.00 0.00 3.20 0.00 0.00 0.00 3.60 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.40 0.00 0.00 0.00 4.80 0.00 0.00 0.00 5.20 0.00 0.00 0.00 5.60 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.40 0.01 0.00 0.01 6.80 0.01 0.00 0.01 7.20 0.01 0.00 0.01 7.60 0.02 0.00 0.02 8.00 0.02 0.00 0.02 8.40 0.03 0.00 0.03 8.80 0.04 0.00 0.04 9.20 0.05 0.00 0.05 9.60 0.07 0.00 0.07 10.00 0.09 0.00 0.09 10.40 0.12 0.00 0.12 10.80 0.18 0.00 0.18 11.20 0.26 0.00 0.26 11.60 0.45 0.00 0.45 12.00 4.86 0.00 4.86 12.40 1.81 0.00 1.81 12.80 0.93 0.00 0.93 13.20 0.65 0.00 0.65 13.60 0.41 0.00 0.41 14.00 0.30 0.00 0.30 14.40 0.27 0.00 0.27 14.80 0.24 0.00 0.24 15.20 0.22 0.00 0.22 15.60 0.20 0.00 0.20 16.00 0.18 0.00 0.18 16.40 0.17 0.00 0.17 16.80 0.16 0.00 0.16 17.20 0.16 0.00 0.16 17.60 0.15 0.00 0.15 18.00 0.14 0.00 0.14 18.40 0.13 0.00 0.13 18.80 0.13 0.00 0.13 19.20 0.12 0.00 0.12 19.60 0.11 0.00 0.11 20.00 0.10 0.00 0.10 20.40 0.10 0.00 0.10 Time Inflow Elevation Primary (hours) [cfs] (feel) (cfs) 20.80 0.10 0.00 0.10 21.20 0.10 0.00 0.10 21.60 0.09 0.00 0.09 22.00 0.09 0.00 0.09 22.40 0.09 0.00 0.09 22.80 0.09 0.00 0.09 23.20 0.09 0.00 0.09 23.60 0.09 0.00 0.09 24.00 0.09 0.00 0.09 1S PostDev #? Unrouted �7 (2S PostDev # to Storage System #1 AP Storage ystem #1 3L /2P\ 0 3S Outfall Storage System #2 4ubcat (Reach on L __ PostDev #2 to Storage System #2 Post Area #2A Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Pa, ece22 Area Listing (all nodes) Area CN Description (acres) (subcatchment - numbers) 1.640 74 >75% Grass cover, Good, HSG C (1S, 2S, 3S) 0.170 98 Impervious (1S) 1.170 98 Paved parking, HSG B (2S, 3S) 0.380 70 Woods, Good, HSG C (1 S) 3.360 83 TOTAL AREA Post Area #2A Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 1.170 HSG B 2S, 3S 2.020 HSG C 1 S, 2S, 3S 0.000 HSG D 0.170 Other is 3.360 TOTAL AREA Post Area #2A Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 4 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 1.640 0.000 0.000 1.640 >75% Grass cover, Good 1 S, 2S, 3S 0.000 0.000 0.000 0.000 0.170 0.170 Impervious 1S 0.000 1.170 0.000 0.000 0.000 1.170 Paved parking 2S, 3S 0.000 0.000 0.380 0.000 0.000 0.380 Woods, Good 1S 0.000 1.170 2.020 0.000 0.170 3.360 TOTAL AREA Post Area #2A Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 5 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 1 P 463.50 462.66 41.4 0.0203 0.013 24.0 0.0 0.0 2 2P 462.66 462.32 20.0 0.0170 0.013 15.0 0.0 0.0 Post Area #2A Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H riroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Pa e 6 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PostDev #2 Unrouted Runoff Area =1.460 ac 11.64% Impervious Runoff Depth >1.03" Flow Length =380' Tc =21.0 min CN =76 Runoff =1.58 cfs 0.126 of Subcatchment 2S: PostDev #2 to Storage Runoff Area =1.420 ac 64.08% Impervious Runoff Depth >1.93" Tc =6.0 min CN =89 Runoff =4.79 cfs 0.229 of Subcatchment 3S: PostDev #2 to Storage Runoff Area =0.480 ac 54.17% Impervious Runoff Depth >1.77" Tc =6.0 min CN =87 Runoff =1.50 cfs 0.071 of Pond 1P: Storage System #1 Peak Elev= 465.69' Storage =0.024 of Inflow =4.79 cfs 0.229 of Outflow =3.50 cfs 0.229 of Pond 2P: Storage System #2 Peak Elev= 465.32' Storage =0.083 of Inflow =4.81 cfs 0.299 of Outflow =1.69 cfs 0.298 of Link 3L: Outfall Inflow =3.25 cfs 0.424 of Primary=3.25 cfs 0.424 of Total Runoff Area = 3.360 ac Runoff Volume = 0.426 of Average Runoff Depth = 1.52" 60.12% Pervious = 2.020 ac 39.88% Impervious = 1.340 ac Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 7 Summary for Subcatchment 1 S: PostDev #2 Unrouted Runoff = 1.58 cfs @ 12.15 hrs, Volume= 0.126 af, Depth> 1.03" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Description 0.170 98 Impervious 0.910 74 >75% Grass cover, Good, HSG C 0.380 70 Woods, Good, HSG C 1.460 76 Weighted Average 1.290 0.09 88.36% Pervious Area 0.170 11.64% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ft/sec cfs 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Perim= 2.0' r= 1.00' n= 0.240 21.0 N 1 3 0 LL 0& 0 380 Total Subcatchment 1S: PostDev #2 Unrouted Hydrograph Type II 24 -hr 1 -Year Rainfall= 3.04" Runoff Area-1.460 ac Runoff Volume =0.126 of , Runoff Depth >1.03" Flow Length =380' Tc =21.0 min CN =76 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 Area #2A Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 1S: PostDev #2 Unrouted Time Precip. Excess Runoff hours inches inches cfs 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.00 0.00 5.00 0.19 0.00 0.00 5.50 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.50 0.27 0.00 0.00 7.00 0.30 0.00 0.00 7.50 0.33 0.00 0.00 8.00 0.36 0.00 0.00 8.50 0.40 0.00 0.00 9.00 0.45 0.00 0.00 9.50 0.50 0.00 0.00 10.00 0.55 0.00 0.00 10.50 0.62 0.00 0.00 11.00 0.71 0.00 0.00 11.50 0.86 0.02 0.03 12.00 2.02 0.42 0.88 12.50 2.23 0.54 0.53 13.00 2.35 0.60 0.21 13.50 2.43 0.65 0.15 14.00 2.49 0.69 0.12 14.50 2.55 0.72 0.10 15.00 2.59 0.75 0.09 15.50 2.64 0.78 0.08 16.00 2.68 0.80 0.07 16.50 2.71 0.82 0.06 17.00 2.74 0.84 0.06 17.50 2.77 0.86 0.06 18.00 2.80 0.88 0.05 18.50 2.83 0.90 0.05 19.00 2.85 0.92 0.05 19.50 2.87 0.93 0.04 20.00 2.89 0.94 0.04 20.50 2.91 0.96 0.04 21.00 2.93 0.97 0.04 21.50 2.95 0.98 0.04 22.00 2.97 0.99 0.04 22.50 2.99 1.01 0.04 23.00 3.01 1.02 0.04 23.50 3.02 1.03 0.03 24.00 3.04 1.04 0.03 Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 2S: PostDev #2 to Storage System #1 Runoff = 4.79 cfs @ 11.97 hrs, Volume= 0.229 af, Depth> 1.93" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area ac CN Description 0.910 98 Paved parking, HSG B 0.510 74 >75% Grass cover, Good, HSG C 1.420 89 Weighted Average 0.510 35.92% Pervious Area 0.910 64.08% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 2S: PostDev #2 to Storage System #1 Hydrograph 5 s.r ck Type 1124 -h r 1 -Year Rainfall= 3.04" 4 Runoff Area =1.420 ac Runoff Volume =0.229 of 3 Runoff Depth >1.93" LL Tc =6.0 min 2 CN =89 I 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Post Area #2A Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 2S: PostDev #2 to Storage System #1 Time Precip. Excess Runoff (hours) {inches} {inches} {cfs) 0.00 0.00 0.00 _ 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.00 0.00 5.00 0.19 0.00 0.00 5.50 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.50 0.27 0.00 0.00 7.00 0.30 0.00 0.01 7.50 0.33 0.01 0.01 8.00 0.36 0.01 0.02 8.50 0.40 0.02 0.02 9.00 0.45 0.03 0.03 9.50 0.50 0.04 0.04 10.00 0.55 0.06 0.06 10.50 0.62 0.09 0.09 11.00 0.71 0.13 0.14 11.50 0.86 0.20 0.26 12.00 2.02 1.04 4.45 12.50 2.23 1.23 0.40 13.00 2.35 1.32 0.25 13.50 2.43 1.39 0.19 14.00 2.49 1.45 0.15 14.50 2.55 1.50 0.13 15.00 2.59 1.54 0.12 15.50 2.64 1.58 0.10 16.00 2.68 1.61 0.09 16.50 2.71 1.64 0.08 17.00 2.74 1.67 0.08 17.50 2.77 1.69 0.08 18.00 2.80 1.72 0.07 18.50 2.83 1.74 0.07 19.00 2.85 1.77 0.06 19.50 2.87 1.79 0.06 20.00 2.89 1.80 0.05 20.50 2.91 1.82 0.05 21.00 2.93 1.84 0.05 21.50 2.95 1.86 0.05 22.00 2.97 1.87 0.05 22.50 2.99 1.89 0.05 23.00 3.01 1.91 0.05 23.50 3.02 1.92 0.04 24.00 3.04 1.94 0.04 Post Area #2A Type// 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADQ 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 11 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 1.50 cfs @ 11.97 hrs, Volume= 0.071 af, Depth> 1.77" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 -Year Rainfall= 3.04" Area (ac) CN Description 0.260 98 Paved parking, HSG B 0.220 74 >75% Grass cover. Good, HSG C 0.480 87 Weighted Average 0.220 45.83% Pervious Area 0.260 54.17% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec cfs 6.0 Direct Entry, N 3 0 U_ Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph Type 11:24-hr 1 -Year Rainfall= 3.04" Runoff Area =0.480 ac RunbffVb1ume =0.071 of Runoff Depth >1.77" Tc =6.0 min CN =87 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 Area #2A Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 12 Hydrograph for Subcatchment 3S: PostDev #2 to Storage System #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.03 0.00 0.00 1.50 0.05 0.00 0.00 2.00 0.07 0.00 0.00 2.50 0.09 0.00 0.00 3.00 0.10 0.00 0.00 3.50 0.13 0.00 0.00 4.00 0.15 0.00 0.00 4.50 0.17 0.00 0.00 5.00 0.19 0.00 0.00 5.50 0.22 0.00 0.00 6.00 0.24 0.00 0.00 6.50 0.27 0.00 0.00 7.00 0.30 0.00 0.00 7.50 0.33 0.00 0.00 8.00 0.36 0.00 0.00 8.50 0.40 0.01 0.00 9.00 0.45 0.01 0.01 9.50 0.50 0.02 0.01 10.00 0.55 0.04 0.01 10.50 0.62 0.06 0.02 11.00 0.71 0.09 0.04 11.50 0.86 0.15 0.07 12.00 2.02 0.92 1.40 12.50 2.23 1.09 0.13 13.00 2.35 1.18 0.08 13.50 2.43 1.25 0.06 14.00 2.49 1.31 0.05 14.50 2.55 1.35 0.04 15.00 2.59 1.39 0.04 15.50 2.64 1.43 0.03 16.00 2.68 1.46 0.03 16.50 2.71 1.49 0.03 17.00 2.74 1.52 0.03 17.50 2.77 1.54 0.02 18.00 2.80 1.57 0.02 18.50 2.83 1.59 0.02 19.00 2.85 1.61 0.02 19.50 2.87 1.63 0.02 20.00 2.89 1.65 0.02 20.50 2.91 1.66 0.02 21.00 2.93 1.68 0.02 21.50 2.95 1.70 0.02 22.00 2.97 1.71 0.02 22.50 2.99 1.73 0.02 23.00 3.01 1.74 0.01 23.50 3.02 1.76 0.01 24.00 3.04 1.77 0.01 Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 13 Summary for Pond 1 P: Storage System #1 Inflow Area = 1.420 ac, 64.08% Impervious, Inflow Depth > 1.93" for 1 -Year event Inflow = 4.79 cfs @ 11.97 hrs, Volume= 0.229 of Outflow = 3.50 cfs @ 12.03 hrs, Volume= 0.229 af, Atten= 27 %, Lag= 3.5 min Primary = 3.50 cfs @ 12.03 hrs, Volume= 0.229 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 465.69'@ 12.03 hrs Surf.Area= 0.015 ac Storage= 0.024 of Plug -Flow detention time= 3.7 min calculated for 0.229 of (100% of inflow) Center -of -Mass det. time= 2.9 min ( 812.1 - 809.2 ) Volume Invert Avail.Stora a Storage Description #1 463.50' 0.072 of 72.0" Round Pipe Storage L= 111.0' Device Routing Invert Outlet Devices #1 Primary 463.50' 24.0" Round Culvert L= 41.4' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 463.50'/462.66' S=0.0203'/' Cc= 0.900 n=0.013 Concrete sewer w /manholes & inlets, Flow Area= 3.14 sf #2 Device 1 463.50' 10.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 468.00' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 1.5' Crest Height Primary OutFlow Max =3.50 cfs @ 12.03 hrs HW= 465.69' (Free Discharge) t---1= Culvert (Passes 3.50 cfs of 13.05 cfs potential flow) L2=Orifi ce/G rate (Orifice Controls 3.50 cfs @ 6.42 fps) 3= Sharp- Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #2A Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 14 Pond 1 P: Storage System #1 Hydrograph 5 4 F 3 u 3 0 LL %i III 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pond 1 P: Storage System #1 Stage- Discharge :v9 468 d 467 0 0 0 m 466 w 465 4n" "4 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD®10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 15 469 468 d 167 w C 0 .9 m 466 W 465 464 Pond 1 P: Storage System #1 Stage- Area - Storage Pips Storage 0 0.005 001 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 0.06 0.065 0.07 Storage (acre -feet) Storage Post Area #2A Type 11 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD ®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 16 Hydrograph for Pond 1 P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 463.50 0.00 0.50 0.00 0.000 463.50 0.00 1.00 0.00 0.000 463.50 0.00 1.50 0.00 0.000 463.50 0.00 2.00 0.00 0.000 463.50 0.00 2.50 0.00 0.000 463.50 0.00 3.00 0.00 0.000 463.50 0.00 3.50 0.00 0.000 463.50 0.00 4.00 0.00 0.000 463.50 0.00 4.50 0.00 0.000 463.50 0.00 5.00 0.00 0.000 463.50 0.00 5.50 0.00 0.000 463.50 0.00 6.00 0.00 0.000 463.50 0.00 6.50 0.00 0.000 463.51 0.00 7.00 0.01 0.000 463.52 0.01 7.50 0.01 0.000 463.54 0.01 8.00 0.02 0.000 463.56 0.01 8.50 0.02 0.000 463.57 0.02 9.00 0.03 0.000 463.58 0.03 9.50 0.04 0.000 463.60 0.04 10.00 0.06 0.000 463.62 0.06 10.50 0.09 0.000 463.64 0.08 11.00 0.14 0.001 463.68 0.13 11.50 0.26 0.001 463.76 0.25 12.00 4.45 0.023 465.60 3.41 12.50 0.40 0.002 463.85 0.43 13.00 0.25 0.001 463.76 0.25 13.50 0.19 0.001 463.72 0.19 14.00 0.15 0.001 463.70 0.15 14.50 0.13 0.001 463.68 0.13 15.00 0.12 0.001 463.67 0.12 15.50 0.10 0.001 463.66 0.11 16.00 0.09 0.000 463.65 0.09 16.50 0.08 0.000 463.64 0.09 17.00 0.08 0.000 463.64 0.08 17.50 0.08 0.000 463.64 0.08 18.00 0.07 0.000 463.63 0.07 18.50 0.07 0.000 463.63 0.07 19.00 0.06 0.000 463.62 0.06 19.50 0.06 0.000 463.62 0.06 20.00 0.05 0.000 463.61 0.05 20.50 0.05 0.000 463.61 0.05 21.00 0.05 0.000 463.61 0.05 21.50 0.05 0.000 463.61 0.05 22.00 0.05 0.000 463.61 0.05 22.50 0.05 0.000 463.61 0.05 23.00 0.05 0.000 463.60 0.05 23.50 0.04 0.000 463.60 0.04 24.00 0.04 0.000 463.60 0.04 Post Area #2A Type// 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 17 Elevation Primary (feet) (cfs) 463.50 0.00 463.54 0.01 463.58 0.03 463.62 0.06 463.66 0.10 463.70 0.15 463.74 0.22 463.78 0.29 463.82 0.37 463.86 0.46 463.90 0.56 463.94 0.66 463.98 0.77 464.02 0.88 464.06 0.99 464.10 1.11 464.14 1.22 464.18 1.34 464.22 1.45 464.26 1.55 464.30 1.64 464.34 1.71 464.38 1.79 464.42 1.86 464.46 1.94 464.50 2.01 464.54 2.07 464.58 2.14 464.62 2.20 464.66 2.26 464.70 2.32 464.74 2.38 464.78 2.44 464.82 2.50 464.86 2.55 464.90 2.60 464.94 2.66 464.98 2.71 465.02 2.76 465.06 2.81 465.10 2.86 465.14 2.90 465.18 2.95 465.22 3.00 465.26 3.04 465.30 3.09 465.34 3.13 465.38 3.18 465.42 3.22 465.46 3.26 465.50 3.30 465.54 3.35 Stage- Discharge for Pond 1 P: Storage System #1 Elevation Primary (feet) (cfs) 465.58 3.39 465.62 3.43 465.66 3.47 465.70 3.51 465.74 3.55 465.78 3.58 465.82 3.62 465.86 3.66 465.90 3.70 465.94 3.74 465.98 3.77 466.02 3.81 466.06 3.84 466.10 3.88 466.14 3.92 466.18 3.95 466.22 3.99 466.26 4.02 466.30 4.05 466.34 4.09 466.38 4.12 466.42 4.16 466.46 4.19 466.50 4.22 466.54 4.25 466.58 4.29 466.62 4.32 466.66 4.35 466.70 4.38 466.74 4.41 466.78 4.44 466.82 4.47 466.86 4.51 466.90 4.54 466.94 4.57 466.98 4.60 467.02 4.63 467.06 4.66 467.10 4.69 467.14 4.71 467.18 4.74 467.22 4.77 467.26 4.80 467.30 4.83 467.34 4.86 467.38 4.89 467.42 4.92 467.46 4.94 467.50 4.97 467.54 5.00 467.58 5.03 467.62 5.05 Elevation Primary (feet)_ (cfs) 467.66 5.08 467.70 5.11 467.74 5.14 467.78 5.16 467.82 5.19 467.86 5.21 467.90 5.24 467.94 5.27 467.98 5.29 468.02 5.36 468.06 5.54 468.10 5.79 468.14 6.09 468.18 6.43 468.22 6.81 468.26 7.22 468.30 7.67 468.34 8.14 468.38 8.65 468.42 9.18 468.46 9.73 468.50 10.31 468.54 10.92 468.58 11.55 468.62 12.20 468.66 12.87 468.70 13.56 468.74 14.27 468.78 15.00 468.82 15.75 468.86 16.52 468.90 17.31 468.94 18.12 468.98 18.94 469.02 19.78 469.06 20.64 469.10 21.52 469.14 22.41 469.18 23.32 469.22 24.24 469.26 25.19 469.30 26.14 469.34 26.27 469.38 26.38 469.42 26.49 469.46 26.60 469.50 26.70 Post Area #2A Type// 24 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC _ _ Page 18 Stage -Area- Storage for Pond 1 P: Storage System #1 Elevation Storage (feet) (acre -feet) 463.50 0.000 463.54 0.000 463.58 0.000 463.62 0.000 463.66 0.001 463.70 0.001 463.74 0.001 463.78 0.001 463.82 0.001 463.86 0.002 463.90 0.002 463.94 0.002 463.98 0.003 464.02 0.003 464.06 0.003 464.10 0.004 464.14 0.004 464.18 0.005 464.22 0.005 464.26 0.005 464.30 0.006 464.34 0.006 464.38 0.007 464.42 0.007 464.46 0.007 464.50 0.008 464.54 0.008 464.58 0.009 464.62 0.009 464.66 0.010 464.70 0.010 464.74 0.011 464.78 0.011 464.82 0.012 464.86 0.012 464.90 0.013 464.94 0.013 464.98 0.014 465.02 0.014 465.06 0.015 465.10 0.015 465.14 0.016 465.18 0.017 465.22 0.017 465.26 0.018 465.30 0.018 465.34 0.019 465.38 0.019 465.42 0.020 465.46 0.020 465.50 0.021 465.54 0.022 Elevation Storage (feet) (acre -feet) 465.58 0.022 465.62 0.023 465.66 0.023 465.70 0.024 465.74 0.025 465.78 0.025 465.82 0.026 465.86 0.026 465.90 0.027 465.94 0.028 465.98 0.028 466.02 0.029 466.06 0.029 466.10 0.030 466.14 0.031 466.18 0.031 466.22 0.032 466.26 0.032 466.30 0.033 466.34 0.034 466.38 0.034 466.42 0.035 466.46 0.035 466.50 0.036 466.54 0.037 466.58 0.037 466.62 0.038 466.66 0.038 466.70 0.039 466.74 0.040 466.78 0.040 466.82 0.041 466.86 0.042 466.90 0.042 466.94 0.043 466.98 0.043 467.02 0.044 467.06 0.045 467.10 0.045 467.14 0.046 467.18 0.046 467.22 0.047 467.26 0.048 467.30 0.048 467.34 0.049 467.38 0.049 467.42 0.050 467.46 0.050 467.50 0.051 467.54 0.052 467.58 0.052 467.62 0.053 Elevation Storage (feet) (acre -feet) 467.66 0.053 467.70 0.054 467.74 0.054 467.78 0.055 467.82 0.056 467.86 0.056 467.90 0.057 467.94 0.057 467.98 0.058 468.02 0.058 468.06 0.059 468.10 0.059 468.14 0.060 468.18 0.060 468.22 0.061 468.26 0.061 468.30 0.062 468.34 0.062 468.38 0.063 468.42 0.063 468.46 0.064 468.50 0.064 468.54 0.065 468.58 0.065 468.62 0.065 468.66 0.066 468.70 0.066 468.74 0.067 468.78 0.067 468.82 0.068 468.86 0.068 468.90 0.068 468.94 0.069 468.98 0.069 469.02 0.069 469.06 0.070 469.10 0.070 469.14 0.070 469.18 0.071 469.22 0.071 469.26 0.071 469.30 0.071 469.34 0.072 469.38 0.072 469.42 0.072 469.46 0.072 469.50 0.072 Post Area #2A Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Page 19 Summary for Pond 2P: Storage System #2 [81 ] Warning: Exceeded Pond 1 P by 1.28' @ 12.29 hrs Inflow Area = 1.900 ac, 61.58% Impervious, Inflow Depth > 1.89" for 1 -Year event Inflow = 4.81 cfs @ 12.00 hrs, Volume= 0.299 of Outflow = 1.69 cfs @ 12.21 hrs, Volume= 0.298 af, Atten= 65 %, Lag= 12.8 min Primary = 1.69 cfs @ 12.21 hrs, Volume= 0.298 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 465.32'@ 12.21 hrs Surf.Area= 0.041 ac Storage= 0.083 of Plug -Flow detention time= 18.9 min calculated for 0.298 of (100% of inflow) Center -of -Mass det. time= 16.9 min ( 830.2 - 813.3 ) Volume Invert Avail.Stora a Storage Description #1 462.66' 0.195 of 72.0" Round Pipe Storage L= 300.0' Device Routinq Invert Outlet Devices #1 Primary 462.66' 15.0" Round Culvert L= 20.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 462.66'/ 462.32' S=0.0170'/' Cc= 0.900 n=0.013 Concrete sewer w /manholes & inlets, Flow Area= 1.23 sf #2 Device 1 462.66' 8.0" W x 4.0" H Vert. Orifice /Grate C= 0.600 #3 Device 1 465.91' 9.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 467.56' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction (s) 1.1' Crest Height Primary OutFlow Max =1.69 cfs @ 12.21 hrs HW= 465.32' (Free Discharge) L1= Culvert (Passes 1.69 cfs of 6.65 cfs potential flow) 2 Orifice /Grate (Orifice Controls 1.69 cfs @ 7.60 fps) 3= Orifice /Grate ( Controls 0.00 cfs) 4_Sharp- Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD@ 10.00 s/n 06538 @2013 H droCAC Software Solutions LLC Page 20 Pond 2P: Storage System #2 Hydrograph 5 :1 H J V 3 O LL 2 G 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) 468 467 d 466 0 a� w 465 464 463 0 Pond 2P: Storage System #2 Stage- Discharge 1 2 3 4 5 6 7 6 9 10 Discharge (cfs) ■ Inflow ■ Primary � Primary Post Area #2A Type 1124 -hr 1 -Year Rainfall= 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 C 2013 H droCAD Software Solutions LLC Page 21 468 467 as •16fi c 0 d w 465 464 16:.3 Pond 2P: Storage System #2 Stage- Area - Storage Ripe Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 016 0.17 0.18 019 Storage (acre -feet) ■ Storage Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Pam Hydrograph for Pond 2P: Storage System #2 Time Inflow Storage Elevation Primary hours ) (cfs) (acre -Feet feet cfs 0.00 0.00 0.000 462.66 0.00 0.50 0.00 0.000 462.66 0.00 1.00 0.00 0.000 462.66 0.00 1.50 0.00 0.000 462.66 0.00 2.00 0.00 0.000 462.66 0.00 2.50 0.00 0.000 462.66 0.00 3.00 0.00 0.000 462.66 0.00 3.50 0.00 0.000 462.66 0.00 4.00 0.00 0.000 462.66 0.00 4.50 0.00 0.000 462.66 0.00 5.00 0.00 0.000 462.66 0.00 5.50 0.00 0.000 462.66 0.00 6.00 0.00 0.000 462.66 0.00 6.50 0.00 0.000 462.66 0.00 7.00 0.01 0.000 462.67 0.00 7.50 0.01 0.000 462.69 0.01 8.00 0.02 0.000 462.72 0.01 8.50 0.03 0.000 462.73 0.02 9.00 0.04 0.001 462.75 0.03 9.50 0.05 0.001 462.77 0.05 10.00 0.07 0.001 462.79 0.06 10.50 0.11 0.001 462.81 0.10 11.00 0.17 0.002 462.86 0.15 11.50 0.32 0.003 462.93 0.28 12.00 4.81 0.052 464.53 1.40 12.50 0.56 0.064 464.85 1.52 13.00 0.33 0.027 463.84 1.08 13.50 0.25 0.006 463.07 0.52 14.00 0.20 0.003 462.90 0.21 14.50 0.17 0.002 462.87 0.18 15.00 0.16 0.002 462.86 0.16 15.50 0.14 0.002 462.85 0.14 16.00 0.12 0.002 462.84 0.13 16.50 0.11 0.002 462.83 0.11 17.00 0.11 0.002 462.83 0.11 17.50 0.10 0.001 462.82 0.10 18.00 0.09 0.001 462.82 0.10 18.50 0.09 0.001 462.81 0.09 19.00 0.08 0.001 462.80 0.08 19.50 0.08 0.001 462.80 0.08 20.00 0.07 0.001 462.79 0.07 20.50 0.07 0.001 462.79 0.07 21.00 0.07 0.001 462.79 0.07 21.50 0.06 0.001 462.79 0.06 22.00 0.06 0.001 462.79 0.06 22.50 0.06 0.001 462.79 0.06 23.00 0.06 0.001 462.78 0.06 23.50 0.06 0.001 462.78 0.06 24.00 0.06 0.001 462.78 0.06 Post Area #2A Type 1124 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Pa e 23 Elevation Primary (feet) (cfs) 462.66 0.00 462.70 0.01 462.74 0.03 462.78 0.06 462.82 0.10 462.86 0.15 462.90 0.22 462.94 0.29 462.98 0.38 463.02 0.45 463.06 0.50 463.10 0.55 463.14 0.59 463.18 0.63 463.22 0.67 463.26 0.70 463.30 0.73 463.34 0.76 463.38 0.79 463.42 0.82 463.46 0.85 463.50 0.88 463.54 0.90 463.58 0.93 463.62 0.95 463.66 0.98 463.70 1.00 463.74 1.02 463.78 1.04 463.82 1.07 463.86 1.09 463.90 1.11 463.94 1.13 463.98 1.15 464.02 1.17 464.06 1.19 464.10 1.21 464.14 1.23 464.18 1.24 464.22 1.26 464.26 1.28 464.30 1.30 464.34 1.32 464.38 1.33 464.42 1.35 464.46 1.37 464.50 1.38 464.54 1.40 464.58 1.42 464.62 1.43 464.66 1.45 464.70 1.46 Stage- Discharge for Pond 2P: Storage System #2 Elevation Primary (feet) cfs) 464.74 1.48 464.78 1.49 464.82 1.51 464.86 1.53 464.90 1.54 464.94 1.56 464.98 1.57 465.02 1.58 465.06 1.60 465.10 1.61 465.14 1.63 465.18 1.64 465.22 1.65 465.26 1.67 465.30 1.68 465.34 1.70 465.38 1.71 465.42 1.72 465.46 1.74 465.50 1.75 465.54 1.76 465.58 1.78 465.62 1.79 465.66 1.80 465.70 1.81 465.74 1.83 465.78 1.84 465.82 1.85 465.86 1.86 465.90 1.88 465.94 1.89 465.98 1.92 466.02 1.96 466.06 2.01 466.10 2.07 466.14 2.14 466.18 2.21 466.22 2.30 466.26 2.39 466.30 2.49 466.34 2.59 466.38 2.70 466.42 2.81 466.46 2.92 466.50 3.03 466.54 3.13 466.58 3.23 466.62 3.33 466.66 3.40 466.70 3.48 466.74 3.55 466.78 3.62 Elevation Primary (feet) cfs 466.82 3.69 466.86 3.76 466.90 3.83 466.94 3.89 466.98 3.95 467.02 4.01 467.06 4.07 467.10 4.13 467.14 4.19 467.18 4.24 467.22 4.30 467.26 4.35 467.30 4.41 467.34 4.46 467.38 4.51 467.42 4.56 467.46 4.61 467.50 4.66 467.54 4.71 467.58 4.79 467.62 4.99 467.66 5.26 467.70 5.58 467.74 5.95 467.78 6.35 467.82 6.79 467.86 7.26 467.90 7.76 467.94 8.29 467.98 8.85 468.02 9.43 468.06 10.04 468.10 10.24 468.14 10.28 468.18 10.32 468.22 10.36 468.26 10.40 468.30 10.45 468.34 10.49 468.38 10.53 468.42 10.57 468.46 10.61 468.50 10.65 468.54 10.69 468.58 10.73 468.62 10.77 468.66 10.82 Post Area #2A Type // 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 24 Stage -Area- Storage for Pond 2P: Storage System #2 Elevation Storage (feet)_ (acre -feet) 462.66 0.000 462.70 0.000 462.74 0.001 462.78 0.001 462.82 0.001 462.86 0.002 462.90 0.003 462.94 0.003 462.98 0.004 463.02 0.005 463.06 0.006 463.10 0.006 463.14 0.007 463.18 0.008 463.22 0.009 463.26 0.010 463.30 0.011 463.34 0.012 463.38 0.013 463.42 0.014 463.46 0.015 463.50 0.017 463.54 0.018 463.58 0.019 463.62 0.020 463.66 0.021 463.70 0.023 463.74 0.024 463.78 0.025 463.82 0.026 463.86 0.028 463.90 0.029 463.94 0.030 463.98 0.032 464.02 0.033 464.06 0.035 464.10 0.036 464.14 0.037 464.18 0.039 464.22 0.040 464.26 0.042 464.30 0.043 464.34 0.045 464.38 0.046 464.42 0.048 464.46 0.049 464.50 0.051 464.54 0.052 464.58 0.054 464.62 0.055 464.66 0.057 464.70 0.058 Elevation Storage (feet) (acre -feet) 464.74 0.060 464.78 0.062 464.82 0.063 464.86 0.065 464.90 0.066 464.94 0.068 464.98 0.070 465.02 0.071 465.06 0.073 465.10 0.074 465.14 0.076 465.18 0.078 465.22 0.079 465.26 0.081 465.30 0.083 465.34 0.084 465.38 0.086 465.42 0.087 465.46 0.089 465.50 0.091 465.54 0.092 465.58 0.094 465.62 0.096 465.66 0.097 465.70 0.099 465.74 0.101 465.78 0.102 465.82 0.104 465.86 0.106 465.90 0.107 465.94 0.109 465.98 0.111 466.02 0.112 466.06 0.114 466.10 0.115 466.14 0.117 466.18 0.119 466.22 0.120 466.26 0.122 466.30 0.124 466.34 0.125 466.38 0.127 466.42 0.128 466.46 0.130 466.50 0.132 466.54 0.133 466.58 0.135 466.62 0.136 466.66 0.138 466.70 0.139 466.74 0.141 466.78 0.143 Elevation Storage (feet) (acre -feet) 466.82 0.144 466.86 0.146 466.90 0.147 466.94 0.149 466.98 0.150 467.02 0.152 467.06 0.153 467.10 0.154 467.14 0.156 467.18 0.157 467.22 0.159 467.26 0.160 467.30 0.162 467.34 0.163 467.38 0.164 467.42 0.166 467.46 0.167 467.50 0.168 467.54 0.170 467.58 0.171 467.62 0.172 467.66 0.173 467.70 0.175 467.74 0.176 467.78 0.177 467.82 0.178 467.86 0.179 467.90 0.180 467.94 0.181 467.98 0.183 468.02 0.184 468.06 0.185 468.10 0.186 468.14 0.187 468.18 0.187 468.22 0.188 468.26 0.189 468.30 0.190 468.34 0.191 468.38 0.191 468.42 0.192 468.46 0.193 468.50 0.193 468.54 0.194 468.58 0.194 468.62 0.195 468.66 0.195 Post Area #2A Type 1124 -hr 1 -Year Rainfall = 3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 25 Summary for Link 3L: Outfall Inflow Area = 3.360 ac, 39.88% Impervious, Inflow Depth > 1.52" for 1 -Year event Inflow = 3.25 cfs @ 12.16 hrs, Volume= 0.424 of Primary = 3.25 cfs @ 12.16 hrs, Volume= 0.424 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs H w O 3 O LL Link 3L: Outfall Hydrograph 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) ■ Inflow ■ Primary Post Area #2A Type 11 24 -hr 1 -Year Rainfall =3.04" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 Q 2013 HydroCAD Software Solutions LLC Page 26 Hydrograph for Link 3L: Outfall Time Inflow Elevation Primary hours cfs feet cfs 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 5.50 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.50 0.00 0.00 0.00 7.00 0.00 0.00 0.00 7.50 0.01 0.00 0.01 8.00 0.01 0.00 0.01 8.50 0.02 0.00 0.02 9.00 0.03 0.00 0.03 9.50 0.05 0.00 0.05 10.00 0.06 0.00 0.06 10.50 0.10 0.00 0.10 11.00 0.16 0.00 0.16 11.50 0.31 0.00 0.31 12.00 2.28 0.00 2.28 12.50 2.05 0.00 2.05 13.00 1.29 0.00 1.29 13.50 0.66 0.00 0.66 14.00 0.33 0.00 0.33 14.50 0.28 0.00 0.28 15.00 0.25 0.00 0.25 15.50 0.22 0.00 0.22 16.00 0.20 0.00 0.20 16.50 0.18 0.00 0.18 17.00 0.17 0.00 0.17 17.50 0.16 0.00 0.16 18.00 0.15 0.00 0.15 18.50 0.14 0.00 0.14 19.00 0.13 0.00 0.13 19.50 0.12 0.00 0.12 20.00 0.11 0.00 0.11 20.50 0.11 0.00 0.11 21.00 0.10 0.00 0.10 21.50 0.10 0.00 0.10 22.00 0.10 0.00 0.10 22.50 0.10 0.00 0.10 23.00 0.10 0.00 0.10 23.50 0.09 0.00 0.09 24.00 0.09 0.00 0.09 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD®10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 27 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1S: PostDev #2 Unrouted Runoff Area =1.460 ac 11.64% Impervious Runoff Depth >1.49" Flow Length =380' Tc =21.0 min CN =76 Runoff =2.32 cfs 0.181 of Subcatchment 2S: PostDev #2 to Storage Runoff Area =1.420 ac 64.08% Impervious Runoff Depth >2.52" Tc =6.0 min CN =89 Runoff =6.17 cfs 0.298 of Subcatchment 3S: PostDev #2 to Storage Runoff Area =0.480 ac 54.17% Impervious Runoff Depth >2.34" Tc =6.0 min CN =87 Runoff =1.96 cfs 0.094 of Pond 1 P: Storage System #1 Peak Elev= 466.48' Storage =0.036 of Inflow =6.17 cfs 0.298 of Outflow =4.20 cfs 0.298 of Pond 2P: Storage System #2 Peak Elev= 466.07' Storage =0.114 of Inflow =5.89 cfs 0.392 of Outflow =2.02 cfs 0.391 of Link 3L: Outfall Inflow =4.20 cfs 0.572 of Primary=4.20 cfs 0.572 of Total Runoff Area = 3.360 ac Runoff Volume = 0.573 of Average Runoff Depth = 2.05" 60.12% Pervious = 2.020 ac 39.88% Impervious = 1.340 ac Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 HvdroCAD Software Solutions LLC Paqe 28 Summary for Subcatchment 1S: PostDev #2 Unrouted Runoff = 2.32 cfs @ 12.15 hrs, Volume= 0.181 af, Depth> 1.49" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.170 98 Impervious 0.910 74 >75% Grass cover, Good, HSG C 0.380 70 Woods, Good, HSG C 1.460 76 Weighted Average 1.290 0.09 88.36% Pervious Area 0.170 11.64% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) ft/sec cfs 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Perim= 2.0' r= 1.00' n= 0.240 21.0 3 0 LL 21 M 380 Total Subcatchment 1 S: PostDev #2 Unrouted Hydrograph Type II 24 -hr 2 -Year Rainfall-3.68" Runoff Area--1.460 ac Runoff Volume =0.181 of Runoff Depth >1.49" Flow Length =380' Tc =21.0 min CN =76 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Post Area #2A Type 1124 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 29 Hydrograph for Subcatchment 1S: PostDev #2 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.00 6.50 0.33 0.00 0.00 7.00 0.36 0.00 0.00 7.50 0.40 0.00 0.00 8.00 0.44 0.00 0.00 8.50 0.49 0.00 0.00 9.00 0.54 0.00 0.00 9.50 0.60 0.00 0.00 10.00 0.67 0.00 0.00 10.50 0.75 0.00 0.01 11.00 0.86 0.02 0.03 11.50 1.04 0.05 0.08 12.00 2.44 0.66 1.38 12.50 2.70 0.82 0.75 13.00 2.84 0.91 0.29 13.50 2.94 0.98 0.20 14.00 3.02 1.03 0.16 14.50 3.08 1.07 0.13 15.00 3.14 1.11 0.12 15.50 3.19 1.15 0.11 16.00 3.24 1.18 0.10 16.50 3.28 1.21 0.09 17.00 3.32 1.24 0.08 17.50 3.36 1.26 0.08 18.00 3.39 1.29 0.07 18.50 3.42 1.31 0.07 19.00 3.45 1.33 0.06 19.50 3.48 1.35 0.06 20.00 3.50 1.37 0.05 20.50 3.53 1.38 0.05 21.00 3.55 1.40 0.05 21.50 3.57 1.42 0.05 22.00 3.60 1.43 0.05 22.50 3.62 1.45 0.05 23.00 3.64 1.47 0.05 23.50 3.66 1.48 0.05 24.00 3.68 1.50 0.04 Post Area #2A Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 30 Summary for Subcatchment 2S: PostDev #2 to Storage System #1 Runoff = 6.17 cfs @ 11.97 hrs, Volume= 0.298 af, Depth> 2.52" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area (ac) CN Description 0.910 98 Paved parking, HSG B 0.510 74 >75% Grass cover, Good, HSG C 1.420 89 Weighted Average 0.510 35.92% Pervious Area 0.910 64.08% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) cfs) 6.0 Direct Entry, Subcatchment 2S: PostDev #2 to Storage System #1 Hydrograph s n crs 6 Type 11'24-hr 2 -Year Rainfall =3.68," Runoff Area =1.420 ac Runoff Volume =0.298 of 4 Runoff Depth >2.52" 3 U. 3 TIC-6.0 m i n CN =89 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 31 Hydrograph for Subcatchment 2S: PostDev #2 to Storage System #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.01 6.50 0.33 0.01 0.01 7.00 0.36 0.01 0.02 7.50 0.40 0.02 0.02 8.00 0.44 0.03 0.03 8.50 0.49 0.04 0.04 9.00 0.54 0.06 0.06 9.50 0.60 0.08 0.07 10.00 0.67 0.11 0.09 10.50 0.75 0.15 0.13 11.00 0.86 0.21 0.20 11.50 1.04 0.31 0.36 12.00 2.44 1.40 5.70 12.50 2.70 1.64 0.50 13.00 2.84 1.76 0.31 13.50 2.94 1.85 0.24 14.00 3.02 1.92 0.19 14.50 3.08 1.97 0.16 15.00 3.14 2.03 0.15 15.50 3.19 2.08 0.13 16.00 3.24 2.12 0.11 16.50 3.28 2.15 0.11 17.00 3.32 2.19 0.10 17.50 3.36 2.22 0.09 18.00 3.39 2.26 0.09 18.50 3.42 2.28 0.08 19.00 3.45 2.31 0.08 19.50 3.48 2.34 0.07 20.00 3.50 2.36 0.06 20.50 3.53 2.38 0.06 21.00 3.55 2.40 0.06 21.50 3.57 2.42 0.06 22.00 3.60 2.45 0.06 22.50 3.62 2.47 0.06 23.00 3.64 2.49 0.06 23.50 3.66 2.51 0.06 24.00 3.68 2.52 0.05 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Pa e 32 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 1.96 cfs @ 11.97 hrs, Volume= 0.094 af, Depth> 2.34" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 -Year Rainfall= 3.68" Area ac CN Description 0.260 98 Paved parking, HSG B 0.220 74 >75% Grass cover, Good, HSG C 0.480 87 Weighted Average 0.220 45.83% Pervious Area 0.260 54.17% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) ft/ft (ft/sec ) (cfs 6.0 Direct Entry, Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph ■ Runoff 2 Type 1124-hr 2 -Year Rainfall= 3.68" Runoff Area =0.480 ac Runoff! Volume =0.094 of Runoff Depth >2.34' Tc =6..0 min LL CN =87 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 Area #2A Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 33 Hydrograph for Subcatchment 3S: PostDev #2 to Storage System #2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.02 0.00 0.00 1.00 0.04 0.00 0.00 1.50 0.06 0.00 0.00 2.00 0.08 0.00 0.00 2.50 0.10 0.00 0.00 3.00 0.13 0.00 0.00 3.50 0.15 0.00 0.00 4.00 0.18 0.00 0.00 4.50 0.20 0.00 0.00 5.00 0.23 0.00 0.00 5.50 0.26 0.00 0.00 6.00 0.29 0.00 0.00 6.50 0.33 0.00 0.00 7.00 0.36 0.00 0.00 7.50 0.40 0.01 0.00 8.00 0.44 0.01 0.01 8.50 0.49 0.02 0.01 9.00 0.54 0.03 0.01 9.50 0.60 0.05 0.02 10.00 0.67 0.07 0.02 10.50 0.75 0.10 0.04 11.00 0.86 0.16 0.06 11.50 1.04 0.25 0.11 12.00 2.44 1.26 1.82 12.50 2.70 1.48 0.16 13.00 2.84 1.60 0.10 13.50 2.94 1.69 0.08 14.00 3.02 1.75 0.06 14.50 3.08 1.81 0.05 15.00 3.14 1.86 0.05 15.50 3.19 1.91 0.04 16.00 3.24 1.95 0.04 16.50 3.28 1.99 0.03 17.00 3.32 2.02 0.03 17.50 3.36 2.05 0.03 18.00 3.39 2.08 0.03 18.50 3.42 2.11 0.03 19.00 3.45 2.14 0.03 19.50 3.48 2.16 0.02 20.00 3.50 2.19 0.02 20.50 3.53 2.21 0.02 21.00 3.55 2.23 0.02 21.50 3.57 2.25 0.02 22.00 3.60 2.27 0.02 22.50 3.62 2.29 0.02 23.00 3.64 2.31 0.02 23.50 3.66 2.33 0.02 24.00 3.68 2.34 0.02 Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 34 Summary for Pond 1 P: Storage System #1 Inflow Area = 1.420 ac, 64.08% Impervious, Inflow Depth > 2.52" for 2 -Year event Inflow = 6.17 cfs @ 11.97 hrs, Volume= 0.298 of Outflow = 4.20 cfs @ 12.04 hrs, Volume= 0.298 af, Atten= 32 %, Lag= 3.9 min Primary = 4.20 cfs @ 12.04 hrs, Volume= 0.298 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 466.48' @ 12.04 hrs Surf.Area= 0.015 ac Storage= 0.036 of Plug -Flow detention time= 3.9 min calculated for 0.298 of (100% of inflow) Center -of -Mass det. time= 3.2 min ( 804.9 - 801.7 ) Volume Invert Avail.Stora a Storage Description #1 463.50' 0.072 of 72.0" Round Pipe Storage L= 111.0' Device Routina Invert Outlet Devices #1 Primary 463.50' 24.0" Round Culvert L= 41.4' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 463.50'/ 462.66' S= 0.0203 T Cc= 0.900 n=0.013 Concrete sewer w /manholes & inlets, Flow Area= 3.14 sf #2 Device 1 463.50' 10.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 468.00' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 1.5' Crest Height Primary OutFlow Max =4.20 cfs @ 12.04 hrs HW= 466.47' (Free Discharge) t-1 =Culvert (Passes 4.20 cfs of 16.77 cfs potential flow) t2=0rificeIG rate (Orifice Controls 4.20 cfs @ 7.70 fps) 3= Sharp - Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 35 Pond 1 P: Storage System #1 Hydrograph 6 Inflow (Area =1.420 .ac Pea k Elev= 466.48' 5 St6rage= 0.036 of w 4 I LL 3 2 F Q ". 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) Pond 1 P: Storage System #1 Stage- Discharge 469 468 467 C 0 A d 466 W 465 464 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 36 469 468 m 67 c 0 m 166 w 465 e164 Pond 1 P: Storage System #1 Stage- Area - Storage 0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 004 0 045 0.05 0.055 0.06 0.065 0.07 Storage (acre -feet) ❑ S�orac�e Post Area #2A Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 37 Hydrograph for Pond 1 P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 463.50 0.00 0.50 0.00 0.000 463.50 0.00 1.00 0.00 0.000 463.50 0.00 1.50 0.00 0.000 463.50 0.00 2.00 0.00 0.000 463.50 0.00 2.50 0.00 0.000 463.50 0.00 3.00 0.00 0.000 463.50 0.00 3.50 0.00 0.000 463.50 0.00 4.00 0.00 0.000 463.50 0.00 4.50 0.00 0.000 463.50 0.00 5.00 0.00 0.000 463.50 0.00 5.50 0.00 0.000 463.50 0.00 6.00 0.01 0.000 463.52 0.00 6.50 0.01 0.000 463.54 0.01 7.00 0.02 0.000 463.56 0.02 7.50 0.02 0.000 463.57 0.02 8.00 0.03 0.000 463.58 0.03 8.50 0.04 0.000 463.59 0.04 9.00 0.06 0.000 463.61 0.05 9.50 0.07 0.000 463.63 0.06 10.00 0.09 0.000 463.64 0.09 10.50 0.13 0.001 463.68 0.12 11.00 0.20 0.001 463.72 0.19 11.50 0.36 0.001 463.81 0.34 12.00 5.70 0.033 466.31 4.06 12.50 0.50 0.002 463.89 0.55 13.00 0.31 0.001 463.79 0.32 13.50 0.24 0.001 463.75 0.24 14.00 0.19 0.001 463.72 0.19 14.50 0.16 0.001 463.71 0.16 15.00 0.15 0.001 463.70 0.15 15.50 0.13 0.001 463.68 0.13 16.00 0.11 0.001 463.67 0.12 16.50 0.11 0.001 463.66 0.11 17.00 0.10 0.001 463.66 0.10 17.50 0.09 0.001 463.65 0.09 18.00 0.09 0.000 463.65 0.09 18.50 0.08 0.000 463.64 0.08 19.00 0.08 0.000 463.64 0.08 19.50 0.07 0.000 463.63 0.07 20.00 0.06 0.000 463.63 0.07 20.50 0.06 0.000 463.62 0.06 21.00 0.06 0.000 463.62 0.06 21.50 0.06 0.000 463.62 0.06 22.00 0.06 0.000 463.62 0.06 22.50 0.06 0.000 463.62 0.06 23.00 0.06 0.000 463.62 0.06 23.50 0.06 0.000 463.62 0.06 24.00 0.05 0.000 463.62 0.05 Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC _ Page 38 Elevation Primary mm (feet) (cfs) 463.50 0.00 463.54 0.01 463.58 0.03 463.62 0.06 463.66 0.10 463.70 0.15 463.74 0.22 463.78 0.29 463.82 0.37 463.86 0.46 463.90 0.56 463.94 0.66 463.98 0.77 464.02 0.88 464.06 0.99 464.10 1.11 464.14 1.22 464.18 1.34 464.22 1.45 464.26 1.55 464.30 1.64 464.34 1.71 464.38 1.79 464.42 1.86 464.46 1.94 464.50 2.01 464.54 2.07 464.58 2.14 464.62 2.20 464.66 2.26 464.70 2.32 464.74 2.38 464.78 2.44 464.82 2.50 464.86 2.55 464.90 2.60 464.94 2.66 464.98 2.71 465.02 2.76 465.06 2.81 465.10 2.86 465.14 2.90 465.18 2.95 465.22 3.00 465.26 3.04 465.30 3.09 465.34 3.13 465.38 3.18 465.42 3.22 465.46 3.26 465.50 3.30 465.54 3.35 Stage- Discharge for Pond 1 P: Storage System #1 Elevation Primary (feet) (cfs) 465.58 3.39 465.62 3.43 465.66 3.47 465.70 3.51 465.74 3.55 465.78 3.58 465.82 3.62 465.86 3.66 465.90 3.70 465.94 3.74 465.98 3.77 466.02 3.81 466.06 3.84 466.10 3.88 466.14 3.92 466.18 3.95 466.22 3.99 466.26 4.02 466.30 4.05 466.34 4.09 466.38 4.12 466.42 4.16 466.46 4.19 466.50 4.22 466.54 4.25 466.58 4.29 466.62 4.32 466.66 4.35 466.70 4.38 466.74 4.41 466.78 4.44 466.82 4.47 466.86 4.51 466.90 4.54 466.94 4.57 466.98 4.60 467.02 4.63 467.06 4.66 467.10 4.69 467.14 4.71 467.18 4.74 467.22 4.77 467.26 4.80 467.30 4.83 467.34 4.86 467.38 4.89 467.42 4.92 467.46 4.94 467.50 4.97 467.54 5.00 467.58 5.03 467.62 5.05 Elevation feet 467.66 467.70 467.74 467.78 467.82 467.86 467.90 467.94 467.98 468.02 468.06 468.10 468.14 468.18 468.22 468.26 468.30 468.34 468.38 468.42 468.46 468.50 468.54 468.58 468.62 468.66 468.70 468.74 468.78 468.82 468.86 468.90 468.94 468.98 469.02 469.06 469.10 469.14 469.18 469.22 469.26 469.30 469.34 469.38 469.42 469.46 469.50 Primary cfs 5.08 5.11 5.14 5.16 5.19 5.21 5.24 5.27 5.29 5.36 5.54 5.79 6.09 6.43 6.81 7.22 7.67 8.14 8.65 9.18 9.73 10.31 10.92 11.55 12.20 12.87 13.56 14.27 15.00 15.75 16.52 17.31 18.12 18.94 19.78 20.64 21.52 22.41 23.32 24.24 25.19 26.14 26.27 26.38 26.49 26.60 26.70 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 39 Elevation Storage (feet) (acre -feet) 463.50 0.000 463.54 0.000 463.58 0.000 463.62 0.000 463.66 0.001 463.70 0.001 463.74 0.001 463.78 0.001 463.82 0.001 463.86 0.002 463.90 0.002 463.94 0.002 463.98 0.003 464.02 0.003 464.06 0.003 464.10 0.004 464.14 0.004 464.18 0.005 464.22 0.005 464.26 0.005 464.30 0.006 464.34 0.006 464.38 0.007 464.42 0.007 464.46 0.007 464.50 0.008 464.54 0.008 464.58 0.009 464.62 0.009 464.66 0.010 464.70 0.010 464.74 0.011 464.78 0.011 464.82 0.012 464.86 0.012 464.90 0.013 464.94 0.013 464.98 0.014 465.02 0.014 465.06 0.015 465.10 0.015 465.14 0.016 465.18 0.017 465.22 0.017 465.26 0.018 465.30 0.018 465.34 0.019 465.38 0.019 465.42 0.020 465.46 0.020 465.50 0.021 465.54 0.022 Stage -Area- Storage for Pond 1 P: Storage System #1 Elevation Storage (feetj_ (acre -feet) 465.58 0.022 465.62 0.023 465.66 0.023 465.70 0.024 465.74 0.025 465.78 0.025 465.82 0.026 465.86 0.026 465.90 0.027 465.94 0.028 465.98 0.028 466.02 0.029 466.06 0.029 466.10 0.030 466.14 0.031 466.18 0.031 466.22 0.032 466.26 0.032 466.30 0.033 466.34 0.034 466.38 0.034 466.42 0.035 466.46 0.035 466.50 0.036 466.54 0.037 466.58 0.037 466.62 0.038 466.66 0.038 466.70 0.039 466.74 0.040 466.78 0.040 466.82 0.041 466.86 0.042 466.90 0.042 466.94 0.043 466.98 0.043 467.02 0.044 467.06 0.045 467.10 0.045 467.14 0.046 467.18 0.046 467.22 0.047 467.26 0.048 467.30 0.048 467.34 0.049 467.38 0.049 467.42 0.050 467.46 0.050 467.50 0.051 467.54 0.052 467.58 0.052 467.62 0.053 Elevation feet 467.66 467.70 467.74 467.78 467.82 467.86 467.90 467.94 467.98 468.02 468.06 468.10 468.14 468.18 468.22 468.26 468.30 468.34 468.38 468.42 468.46 468.50 468.54 468.58 468.62 468.66 468.70 468.74 468.78 468.82 468.86 468.90 468.94 468.98 469.02 469.06 469.10 469.14 469.18 469.22 469.26 469.30 469.34 469.38 469.42 469.46 469.50 Storage acre -feet 0.053 0.054 0.054 0.055 0.056 0.056 0.057 0.057 0.058 0.058 0.059 0.059 0.060 0.060 0.061 0.061 0.062 0.062 0.063 0.063 0.064 0.064 0.065 0.065 0.065 0.066 0.066 0.067 0.067 0.068 0.068 0.068 0.069 0.069 0.069 0.070 0.070 0.070 0.071 0.071 0.071 0.071 0.072 0.072 0.072 0.072 0.072 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 40 Summary for Pond 2P: Storage System #2 [81] Warning: Exceeded Pond 1P by 1.97' @ 12.33 hrs Inflow Area = 1.900 ac, 61.58% Impervious, Inflow Depth > 2.47" for 2 -Year event Inflow = 5.89 cfs @ 12.00 hrs, Volume= 0.392 of Outflow = 2.02 cfs @ 12.25 hrs, Volume= 0.391 af, Atten= 66 %, Lag= 15.3 min Primary = 2.02 cfs @ 12.25 hrs, Volume= 0.391 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 466.07' @ 12.25 hrs Surf.Area= 0.041 ac Storage= 0.114 of Plug -Flow detention time= 22.0 min calculated for 0.391 of (100% of inflow) Center -of -Mass det. time= 20.2 min ( 826.1 - 805.9 ) Volume Invert Avail.Storage Storage Description #1 462.66' 0.195 of 72.0" Round Pipe Storage L= 300.0' Device Routina Invert Outlet Devices #1 Primary 462.66' 15.0" Round Culvert L= 20.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 462.66'/462.32' S=0.0170'/' Cc= 0.900 n=0.013 Concrete sewer w /manholes & inlets, Flow Area= 1.23 sf #2 Device 1 462.66' 8.0" W x 4.0" H Vert. Orifice /Grate C= 0.600 #3 Device 1 465.91' 9.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 467.56' 4.0' long Sharp- Crested Rectangular Weir 2 End Contractions) 1.1' Crest Height Primary OutFlow Max =2.02 cfs @ 12.25 hrs HW= 466.07' (Free Discharge) L1 = Culvert (Passes 2.02 cfs of 7.79 cfs potential flow) 2-Orifice/Grate (Orifice Controls 1.93 cfs @ 8.67 fps) 3=Orifi ce/G rate (Orifice Controls 0.10 cfs @ 1.37 fps) --Sharp- Crested Rectangular Weir ( Controls 0.00 cfs) Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @ 2013 H droCAD Software Solutions LLC Pa e 41 Pond 2P: Storage System #2 Hydrograph 6 5 4 N w V 0 3 LL 2 S 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Pond 2P: Storage System #2 Stage- Discharge 463 4$7 YN 45fi c 0 m w 465 .16554 463 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) ■ Inflw ■ Primary Primary Post Area #2A Type// 24 -hr 2 -Year Rainfall =3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 W droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 42 468 467 m 0 d w 465 4V, 16 ,3: Pond 2P: Storage System #2 Stage- Area - Storage Pipe Storage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 01 0.11 0.12 0.13 0.14 0.15 0.16 017 0.18 0.19 Storage (acre -feet) ■ Storage Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 43 Hydrograph for Pond 2P: Storage System #2 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 462.66 0.00 0.50 0.00 0.000 462.66 0.00 1.00 0.00 0.000 462.66 0.00 1.50 0.00 0.000 462.66 0.00 2.00 0.00 0.000 462.66 0.00 2.50 0.00 0.000 462.66 0.00 3.00 0.00 0.000 462.66 0.00 3.50 0.00 0.000 462.66 0.00 4.00 0.00 0.000 462.66 0.00 4.50 0.00 0.000 462.66 0.00 5.00 0.00 0.000 462.66 0.00 5.50 0.00 0.000 462.66 0.00 6.00 0.00 0.000 462.67 0.00 6.50 0.01 0.000 462.69 0.01 7.00 0.02 0.000 462.72 0.01 7.50 0.03 0.000 462.73 0.02 8.00 0.03 0.001 462.74 0.03 8.50 0.05 0.001 462.76 0.04 9.00 0.07 0.001 462.78 0.06 9.50 0.08 0.001 462.80 0.08 10.00 0.11 0.001 462.82 0.10 10.50 0.16 0.002 462.85 0.14 11.00 0.24 0.003 462.90 0.22 11.50 0.45 0.004 462.99 0.40 12.00 5.89 0.069 464.97 1.57 12.50 0.71 0.097 465.65 1.80 13.00 0.42 0.052 464.54 1.40 13.50 0.32 0.019 463.58 0.92 14.00 0.25 0.004 462.97 0.35 14.50 0.22 0.003 462.90 0.22 15.00 0.20 0.002 462.89 0.20 15.50 0.17 0.002 462.88 0.18 16.00 0.15 0.002 462.86 0.16 16.50 0.14 0.002 462.85 0.14 17.00 0.13 0.002 462.85 0.14 17.50 0.13 0.002 462.84 0.13 18.00 0.12 0.002 462.84 0.12 18.50 0.11 0.002 462.83 0.11 19.00 0.10 0.001 462.82 0.10 19.50 0.09 0.001 462.82 0.10 20.00 0.09 0.001 462.81 0.09 20.50 0.08 0.001 462.80 0.08 21.00 0.08 0.001 462.80 0.08 21.50 0.08 0.001 462.80 0.08 22.00 0.08 0.001 462.80 0.08 22.50 0.08 0.001 462.80 0.08 23.00 0.08 0.001 462.80 0.08 23.50 0.07 0.001 462.80 0.07 24.00 0.07 0.001 462.79 0.07 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 44 Elevation Primary feet (cfs) 462.66 0.00 462.70 0.01 462.74 0.03 462.78 0.06 462.82 0.10 462.86 0.15 462.90 0.22 462.94 0.29 462.98 0.38 463.02 0.45 463.06 0.50 463.10 0.55 463.14 0.59 463.18 0.63 463.22 0.67 463.26 0.70 463.30 0.73 463.34 0.76 463.38 0.79 463.42 0.82 463.46 0.85 463.50 0.88 463.54 0.90 463.58 0.93 463.62 0.95 463.66 0.98 463.70 1.00 463.74 1.02 463.78 1.04 463.82 1.07 463.86 1.09 463.90 1.11 463.94 1.13 463.98 1.15 464.02 1.17 464.06 1.19 464.10 1.21 464.14 1.23 464.18 1.24 464.22 1.26 464.26 1.28 464.30 1.30 464.34 1.32 464.38 1.33 464.42 1.35 464.46 1.37 464.50 1.38 464.54 1.40 464.58 1.42 464.62 1.43 464.66 1.45 464.70 1.46 Stage- Discharge for Pond 2P: Storage System #2 Elevation Primary (feet) (cfs) 464.74 1.48 464.78 1.49 464.82 1.51 464.86 1.53 464.90 1.54 464.94 1.56 464.98 1.57 465.02 1.58 465.06 1.60 465.10 1.61 465.14 1.63 465.18 1.64 465.22 1.65 465.26 1.67 465.30 1.68 465.34 1.70 465.38 1.71 465.42 1.72 465.46 1.74 465.50 1.75 465.54 1.76 465.58 1.78 465.62 1.79 465.66 1.80 465.70 1.81 465.74 1.83 465.78 1.84 465.82 1.85 465.86 1.86 465.90 1.88 465.94 1.89 465.98 1.92 466.02 1.96 466.06 2.01 466.10 2.07 466.14 2.14 466.18 2.21 466.22 2.30 466.26 2.39 466.30 2.49 466.34 2.59 466.38 2.70 466.42 2.81 466.46 2.92 466.50 3.03 466.54 3.13 466.58 3.23 466.62 3.33 466.66 3.40 466.70 3.48 466.74 3.55 466.78 3.62 Elevation Primary (feet) (Cfs) 466.82 3.69 466.86 3.76 466.90 3.83 466.94 3.89 466.98 3.95 467.02 4.01 467.06 4.07 467.10 4.13 467.14 4.19 467.18 4.24 467.22 4.30 467.26 4.35 467.30 4.41 467.34 4.46 467.38 4.51 467.42 4.56 467.46 4.61 467.50 4.66 467.54 4.71 467.58 4.79 467.62 4.99 467.66 5.26 467.70 5.58 467.74 5.95 467.78 6.35 467.82 6.79 467.86 7.26 467.90 7.76 467.94 8.29 467.98 8.85 468.02 9.43 468.06 10.04 468.10 10.24 468.14 10.28 468.18 10.32 468.22 10.36 468.26 10.40 468.30 10.45 468.34 10.49 468.38 10.53 468.42 10.57 468.46 10.61 468.50 10.65 468.54 10.69 468.58 10.73 468.62 10.77 468.66 10.82 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 45 Stage -Area- Storage for Pond 2P: Storage System #2 Elevation Storage (feet) (acre -feet 462.66 0.000 462.70 0.000 462.74 0.001 462.78 0.001 462.82 0.001 462.86 0.002 462.90 0.003 462.94 0.003 462.98 0.004 463.02 0.005 463.06 0.006 463.10 0.006 463.14 0.007 463.18 0.008 463.22 0.009 463.26 0.010 463.30 0.011 463.34 0.012 463.38 0.013 463.42 0.014 463.46 0.015 463.50 0.017 463.54 0.018 463.58 0.019 463.62 0.020 463.66 0.021 463.70 0.023 463.74 0.024 463.78 0.025 463.82 0.026 463.86 0.028 463.90 0.029 463.94 0.030 463.98 0.032 464.02 0.033 464.06 0.035 464.10 0.036 464.14 0.037 464.18 0.039 464.22 0.040 464.26 0.042 464.30 0.043 464.34 0.045 464.38 0.046 464.42 0.048 464.46 0.049 464.50 0.051 464.54 0.052 464.58 0.054 464.62 0.055 464.66 0.057 464.70 0.058 Elevation Storage (feet) (acre -feet) 464.74 0.060 464.78 0.062 464.82 0.063 464.86 0.065 464.90 0.066 464.94 0.068 464.98 0.070 465.02 0.071 465.06 0.073 465.10 0.074 465.14 0.076 465.18 0.078 465.22 0.079 465.26 0.081 465.30 0.083 465.34 0.084 465.38 0.086 465.42 0.087 465.46 0.089 465.50 0.091 465.54 0.092 465.58 0.094 465.62 0.096 465.66 0.097 465.70 0.099 465.74 0.101 465.78 0.102 465.82 0.104 465.86 0.106 465.90 0.107 465.94 0.109 465.98 0.111 466.02 0.112 466.06 0.114 466.10 0.115 466.14 0.117 466.18 0.119 466.22 0.120 466.26 0.122 466.30 0.124 466.34 0.125 466.38 0.127 466.42 0.128 466.46 0.130 466.50 0.132 466.54 0.133 466.58 0.135 466.62 0.136 466.66 0.138 466.70 0.139 466.74 0.141 466.78 0.143 Elevation Storage (feet) (acre -feet) 466.82 0.144 466.86 0.146 466.90 0.147 466.94 0.149 466.98 0.150 467.02 0.152 467.06 0.153 467.10 0.154 467.14 0.156 467.18 0.157 467.22 0.159 467.26 0.160 467.30 0.162 467.34 0.163 467.38 0.164 467.42 0.166 467.46 0.167 467.50 0.168 467.54 0.170 467.58 0.171 467.62 0.172 467.66 0.173 467.70 0.175 467.74 0.176 467.78 0.177 467.82 0.178 467.86 0.179 467.90 0.180 467.94 0.181 467.98 0.183 468.02 0.184 468.06 0.185 468.10 0.186 468.14 0.187 468.18 0.187 468.22 0.188 468.26 0.189 468.30 0.190 468.34 0.191 468.38 0.191 468.42 0.192 468.46 0.193 468.50 0.193 468.54 0.194 468.58 0.194 468.62 0.195 468.66 0.195 Post Area #2A Type// 24 -hr 2 -Year Rainfall= 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pacie 46 Summary for Link 3L: Outfall Inflow Area = 3.360 ac, 39.88% Impervious, Inflow Depth > 2.04" for 2 -Year event Inflow = 4.20 cfs @ 12.16 hrs, Volume= 0.572 of Primary = 4.20 cfs @ 12.16 hrs, Volume= 0.572 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs 4 3 H U 3 O LL 2 1 Link 3L: Outfall Hydrograph 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) Inflow ■ Prima Post Area #2A Type// 24 -hr 2 -Year Rainfall = 3.68" Prepared by TG- MOSYSCON Printed 6/20/2015 HvdroCAD®10.00 s/n 06538 © 2013 HvdroCAD Software Solutions LLC Page 47 Hydrograph for Link 3L: Outfall Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 5.50 0.00 0.00 0.00 6.00 0.00 0.00 0.00 6.50 0.01 0.00 0.01 7.00 0.01 0.00 0.01 7.50 0.02 0.00 0.02 8.00 0.03 0.00 0.03 8.50 0.04 0.00 0.04 9.00 0.06 0.00 0.06 9.50 0.08 0.00 0.08 10.00 0.10 0.00 0.10 10.50 0.15 0.00 0.15 11.00 0.25 0.00 0.25 11.50 0.48 0.00 0.48 12.00 2.95 0.00 2.95 12.50 2.55 0.00 2.55 13.00 1.69 0.00 1.69 13.50 1.13 0.00 1.13 14.00 0.51 0.00 0.51 14.50 0.36 0.00 0.36 15.00 0.32 0.00 0.32 15.50 0.29 0.00 0.29 16.00 0.25 0.00 0.25 16.50 0.23 0.00 0.23 17.00 0.22 0.00 0.22 17.50 0.20 0.00 0.20 18.00 0.19 0.00 0.19 18.50 0.18 0.00 0.18 19.00 0.17 0.00 0.17 19.50 0.16 0.00 0.16 20.00 0.14 0.00 0.14 20.50 0.13 0.00 0.13 21.00 0.13 0.00 0.13 21.50 0.13 0.00 0.13 22.00 0.13 0.00 0.13 22.50 0.12 0.00 0.12 23.00 0.12 0.00 0.12 23.50 0.12 0.00 0.12 24.00 0.12 0.00 0.12 Post Area #2A Type// 24 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD®10.00 s/n 06538 ©2013_HydroCAD Software Solutions LLC Page 48 Time span =0.00 -24.00 hrs, dt =0.01 hrs, 2401 points Runoff by SCS TR -20 method, UH =SCS, Weighted -CN Reach routing by Stor- Ind +Trans method - Pond routing by Stor -Ind method Subcatchment 1 S: PostDev #2 Unrouted Runoff Area =1.460 ac 11.64% Impervious Runoff Depth >2.99" Flow Length =380' Tc =21.0 min CN =76 Runoff =4.74 cfs 0.363 of Subcatchment 2S: PostDev #2 to Storage Runoff Area =1.420 ac 64.08% Impervious Runoff Depth >4.30" Tc =6.0 min CN =89 Runoff =10.19 cfs 0.509 of Subcatchment 3S: PostDev #2 to Storage Runoff Area =0.480 ac 54.17% Impervious Runoff Depth >4.09" Tc =6.0 min CN =87 Runoff =3.33 cfs 0.164 of Pond 1 P: Storage System #1 Peak Elev= 468.44' Storage =0.063 of Inflow =10.19 cfs 0.509 of Outflow =9.42 cfs 0.509 of Pond 2P: Storage System #2 Peak Elev= 467.58' Storage =0.171 of Inflow =12.50 cfs 0.673 of Outflow =4.80 cfs 0.671 of Link 3L: Outfall Inflow =9.49 cfs 1.034 of Primary=9.49 cfs 1.034 of Total Runoff Area = 3.360 ac Runoff Volume = 1.037 of Average Runoff Depth = 3.70" 60.12% Pervious = 2.020 ac 39.88% Impervious =1.340 ac Post Area #2A Type 1124 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 ; I droCADD 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 49 Summary for Subcatchment 1S: PostDev #2 Unrouted Runoff = 4.74 cfs @ 12.14 hrs, Volume= 0.363 af, Depth> 2.99" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area ac CN Description 0.170 98 Impervious 0.910 74 >75% Grass cover, Good, HSG C 0.380 70 Woods. Good. HSG C 1.460 76 Weighted Average 1.290 88.36% Pervious Area 0.170 11.64% Impervious Area Tc Length Slope Velocity Capacity Description min feet ft/ft ft/sec ) (cfs) 15.3 80 0.0250 0.09 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.68" 5.7 300 0.0200 0.88 1.75 Channel Flow, Area= 2.0 sf Pe-rim= 2.0' r= 1.00' n= 0.240 21.0 380 Total Subcatchment 1S: PostDev #2 Unrouted Hydrograph ■ Runoff Z 3 3 0 LL 2 1 Type II 24-hr 10 -Year Rainfall ,45.56" Runoff Area =1.460 ac' Runoff Volume =0.363 of Runoff Depth >2.99" Flow Length =380' Tc =21.0 min CN =76 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD®10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 50 Hydrograph for Subcatchment 1 S: PostDev #2 Unrouted Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.00 0.00 3.50 0.23 0.00 0.00 4.00 0.27 0.00 0.00 4.50 0.31 0.00 0.00 5.00 0.35 0.00 0.00 5.50 0.40 0.00 0.00 6.00 0.44 0.00 0.00 6.50 0.50 0.00 0.00 7.00 0.55 0.00 0.00 7.50 0.61 0.00 0.00 8.00 0.67 0.00 0.00 8.50 0.74 0.00 0.01 9.00 0.82 0.01 0.02 9.50 0.91 0.02 0.03 10.00 1.01 0.04 0.05 10.50 1.13 0.07 0.08 11.00 1.31 0.12 0.14 11.50 1.57 0.22 0.26 12.00 3.69 1.50 3.05 12.50 4.09 1.81 1.44 13.00 4.29 1.97 0.52 13.50 4.44 2.08 0.36 14.00 4.56 2.18 0.28 14.50 4.66 2.26 0.24 15.00 4.75 2.33 0.21 15.50 4.82 2.39 0.19 16.00 4.89 2.45 0.17 16.50 4.96 2.50 0.15 17.00 5.01 2.55 0.14 17.50 5.07 2.59 0.14 18.00 5.12 2.64 0.13 18.50 5.17 2.68 0.12 19.00 5.21 2.71 0.11 19.50 5.26 2.75 0.10 20.00 5.29 2.78 0.09 20.50 5.33 2.81 0.09 21.00 5.36 2.84 0.09 21.50 5.40 2.87 0.09 22.00 5.43 2.90 0.08 22.50 5.47 2.92 0.08 23.00 5.50 2.95 0.08 23.50 5.53 2.98 0.08 24.00 5.56 3.00 0.08 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 51 Summary for Subcatchment 2S: PostDev #2 to Storage System #1 Runoff = 10.19 cfs @ 11.97 hrs, Volume= 0.509 af, Depth> 4.30" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.910 98 Paved parking, HSG B 0.510 74 >75% Grass cover, Good, HSG C 1.420 89 Weighted Average 0.510 35.92% Pervious Area 0.910 64.08% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) fUft) (ft/sec) cfs 6.0 Direct Entry, Subcatchment 2S: PostDev #2 to Storage System #1 Hydrograph 11 10 Type 11, 24 -hr 9 10 -Year Rainfall 5.56 8 Runoff Area =1.420 ac 7 Runoff Volume =0.509 of 6 Runoff Depth >4.30" 3 5 - ' Tc =6:0 m i n U. <, CN =89 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 Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 52 Hydrograph for Subcatchment 2S: PostDev #2 to Storage System #1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.00 0.00 3.50 0.23 0.00 0.00 4.00 0.27 0.00 0.00 4.50 0.31 0.00 0.01 5.00 0.35 0.01 0.02 5.50 0.40 0.02 0.03 6.00 0.44 0.03 0.04 6.50 0.50 0.04 0.04 7.00 0.55 0.06 0.05 7.50 0.61 0.08 0.07 8.00 0.67 0.11 0.08 8.50 0.74 0.14 0.10 9.00 0.82 0.18 0.13 9.50 0.91 0.23 0.14 10.00 1.01 0.29 0.19 10.50 1.13 0.37 0.26 11.00 1.31 0.49 0.38 11.50 1.57 0.69 0.67 12.00 3.69 2.53 9.35 12.50 4.09 2.90 0.81 13.00 4.29 3.10 0.49 13.50 4.44 3.24 0.37 14.00 4.56 3.35 0.29 14.50 4.66 3.44 0.26 15.00 4.75 3.53 0.23 15.50 4.82 3.60 0.21 16.00 4.89 3.67 0.18 16.50 4.96 3.73 0.17 17.00 5.01 3.79 0.16 17.50 5.07 3.84 0.15 18.00 5.12 3.89 0.14 18.50 5.17 3.93 013 19.00 5.21 3.98 0.12 19.50 5.26 4.02 0.11 20.00 5.29 4.05 0.10 20.50 5.33 4.09 0.10 21.00 5.36 4.12 0.10 21.50 5.40 4.15 0.09 22.00 5.43 4.19 0.09 22.50 5.47 4.22 0.09 23.00 5.50 4.25 0.09 23.50 5.53 4.28 0.09 24.00 5.56 4.31 0.08 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Paae 53 Summary for Subcatchment 3S: PostDev #2 to Storage System #2 Runoff = 3.33 cfs @ 11.97 hrs, Volume= 0.164 af, Depth> 4.09" Runoff by SCS TR -20 method, UH =SCS, Weighted -CN, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 -Year Rainfall = 5.56" Area (ac) CN Description 0.260 98 Paved parking, HSG B 0.220 74 >75% Grass cover, Good, HSG C 0.480 87 Weighted Average 0.220 45.83% Pervious Area 0.260 54.17% Impervious Area Tc Length Slope Velocity Capacity Description min (feet) (ft/ft) (ft/sec) cfs 6.0 Direct Entry, Subcatchment 3S: PostDev #2 to Storage System #2 Hydrograph ■ Runoff Type II 24 -hr 3 10 -Year Rainfall= 5.56" Runoff Area =0.480 ac Runoff Volume =0.164 of 2 Runoff 'Depth >4.09" Tc =6.0 min CN =87 0 0 .. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Post Area #2A Type // 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 N droCADO 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 54 Hydrograph for Subcatchment 3S: PostDev #2 to Storage System #2 Time Precip. Excess Runoff hours inches inches cfs 0.00 0.00 0.00 0.00 0.50 0.03 0.00 0.00 1.00 0.06 0.00 0.00 1.50 0.09 0.00 0.00 2.00 0.12 0.00 0.00 2.50 0.16 0.00 0.00 3.00 0.19 0.00 0.00 3.50 0.23 0.00 0.00 4.00 0.27 0.00 0.00 4.50 0.31 0.00 0.00 5.00 0.35 0.00 0.00 5.50 0.40 0.01 0.00 6.00 0.44 0.01 0.01 6.50 0.50 0.02 0.01 7.00 0.55 0.04 0.01 7.50 0.61 0.05 0.02 8.00 0.67 0.07 0.02 8.50 0.74 0.10 0.03 9.00 0.82 0.13 0.04 9.50 0.91 0.18 0.04 10.00 1.01 0.23 0.06 10.50 1.13 0.30 0.08 11.00 1.31 0.41 0.12 11.50 1.57 0.59 0.21 12.00 3.69 2.35 3.06 12.50 4.09 2.72 0.27 13.00 4.29 2.91 0.16 13.50 4.44 3.05 0.12 14.00 4.56 3.15 0.10 14.50 4.66 3.25 0.09 15.00 4.75 3.33 0.08 15.50 4.82 3.40 0.07 16.00 4.89 3.47 0.06 16.50 4.96 3.52 0.06 17.00 5.01 3.58 0.05 17.50 5.07 3.63 0.05 18.00 5.12 3.68 0.05 18.50 5.17 3.73 0.04 19.00 5.21 3.77 0.04 19.50 5.26 3.81 0.04 20.00 5.29 3.84 0.03 20.50 5.33 3.88 0.03 21.00 5.36 3.91 0.03 21.50 5.40 3.94 0.03 22.00 5.43 3.98 0.03 22.50 5.47 4.01 0.03 23.00 5.50 4.04 0.03 23.50 5.53 4.07 0.03 24.00 5.56 4.10 0.03 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Pape 55 Summary for Pond 1 P: Storage System #1 Inflow Area = 1.420 ac, 64.08% Impervious, Inflow Depth > 4.30" for 10 -Year event Inflow = 10.19 cfs @ 11.97 hrs, Volume= 0.509 of Outflow = 9.42 cfs @ 12.00 hrs, Volume= 0.509 af, Atten= 8 %, Lag= 1.9 min Primary = 9.42 cfs @ 12.00 hrs, Volume= 0.509 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 468.44'@ 12.00 hrs Surf.Area= 0.012 ac Storage= 0.063 of Plug -Flow detention time= 4.3 min calculated for 0.509 of (100% of inflow) Center -of -Mass det. time= 3.7 min ( 790.4 - 786.7 ) Volume Invert Avail.Stora a Storage Description #1 463.50' 0.072 of 72.0" Round Pipe Storage L= 111.0' Device Routing Invert Outlet Devices #1 Primary 463.50' 24.0" Round Culvert L= 41.4' CMP, projecting, no headwall, Ke= 0.900 Inlet / Outlet Invert= 463.50'/ 462.66' S= 0.0203T Cc= 0.900 n= 0.013 Concrete sewer w /manholes & inlets, Flow Area= 3.14 sf #2 Device 1 463.50' 10.0" Vert. Orifice /Grate C= 0.600 #3 Device 1 468.00' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 1.5' Crest Height Primary OutFlow Max =9.40 cfs @ 12.00 hrs HW= 468.44' (Free Discharge) L1 = Culvert (Passes 9.40 cfs of 23.69 cfs potential flow) L2=Orifice/Grate (Orifice Controls 5.58 cfs @ 10.24 fps) 3= Sharp- Crested Rectangular Weir (Weir Controls 3.82 cfs @ 2.24 fps) Post Area #2A Type // 24 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 56 Pond 1 P: Storage System #1 Hydrograph Inflow 1019 cis ■ Primary 1, Inflow, 1a, .�z � Area =1.420'•ac S Peak_ Iev 46;8.44' S Storage =- 0',.063 -af 7 42 w 2. 6 0 LL 5 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) Pond 1 P: Storage System #1 Stage- Discharge 469 Ifiii m 467 w c 0 w d &5 :364 0 2 4 6 8 10 12 14 15 18 20 22 24 26 Discharge (cfs) ■ Prima Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCADO 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Page 57 X69 468 467 d c 0 M 2 466 w 465 464 Pond 1 P: Storage System #1 Stage- Area - Storage 0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.055 0.06 0.065 0.07 Storage (acre -feet) ■ Storage Post Area #2A Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 58 Hydrograph for Pond 1 P: Storage System #1 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 463.50 0.00 0.50 0.00 0.000 463.50 0.00 1.00 0.00 0.000 463.50 0.00 1.50 0.00 0.000 463.50 0.00 2.00 0.00 0.000 463.50 0.00 2.50 0.00 0.000 463.50 0.00 3.00 0.00 0.000 463.50 0.00 3.50 0.00 0.000 463.50 0.00 4.00 0.00 0.000 463.50 0.00 4.50 0.01 0.000 463.53 0.01 5.00 0.02 0.000 463.56 0.02 5.50 0.03 0.000 463.57 0.02 6.00 0.04 0.000 463.59 0.03 6.50 0.04 0.000 463.60 0.04 7.00 0.05 0.000 463.61 0.05 7.50 0.07 0.000 463.63 0.06 8.00 0.08 0.000 463.64 0.07 8.50 0.10 0.001 463.65 0.10 9.00 0.13 0.001 463.68 0.13 9.50 0.14 0.001 463.69 0.14 10.00 0.19 0.001 463.72 0.18 10.50 0.26 0.001 463.76 0.25 11.00 0.38 0.001 463.82 0.37 11.50 0.67 0.002 463.93 0.64 12.00 9.35 0.063 468.44 9.42 12.50 0.81 0.003 464.03 0.92 13.00 0.49 0.002 463.88 0.51 13.50 0.37 0.002 463.82 0.38 14.00 0.29 0.001 463.78 0.30 14.50 0.26 0.001 463.76 0.26 15.00 0.23 0.001 463.75 0.23 15.50 0.21 0.001 463.73 0.21 16.00 0.18 0.001 463.72 0.18 16.50 0.17 0.001 463.71 0.17 17.00 0.16 0.001 463.70 0.16 17.50 0.15 0.001 463.70 0.15 18.00 014 0.001 463.69 0.14 18.50 0.13 0.001 463.68 0.13 19.00 0.12 0.001 463.68 0.12 19.50 0.11 0.001 463.67 0.11 20.00 0.10 0.001 463.66 0.10 20.50 0.10 0.001 463.66 0.10 21.00 0.10 0.001 463.65 0.10 21.50 0.09 0.001 463.65 0.09 22.00 0.09 0.000 463.65 0.09 22.50 0.09 0.000 463.65 0.09 23.00 0.09 0.000 463.65 0.09 23.50 0.09 0.000 463.65 0.09 24.00 0.08 0.000 463.64 0.08 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 59 Elevation Primary (feet) (cfs) 463.50 0.00 463.54 0.01 463.58 0.03 463.62 0.06 463.66 0.10 463.70 0.15 463.74 0.22 463.78 0.29 463.82 0.37 463.86 0.46 463.90 0.56 463.94 0.66 463.98 0.77 464.02 0.88 464.06 0.99 464.10 1.11 464.14 1.22 464.18 1.34 464.22 1.45 464.26 1.55 464.30 1.64 464.34 1.71 464.38 1.79 464.42 1.86 464.46 1.94 464.50 2.01 464.54 2.07 464.58 2.14 464.62 2.20 464.66 2.26 464.70 2.32 464.74 2.38 464.78 2.44 464.82 2.50 464.86 2.55 464.90 2.60 464.94 2.66 464.98 2.71 465.02 2.76 465.06 2.81 465.10 2.86 465.14 2.90 465.18 2.95 465.22 3.00 465.26 3.04 465.30 3.09 465.34 3.13 465.38 3.18 465.42 3.22 465.46 3.26 465.50 3.30 465.54 3.35 Stage- Discharge for Pond 1 P: Storage System #1 Elevation Primary (feet) (cfs) 465.58 3.39 465.62 3.43 465.66 3.47 465.70 3.51 465.74 3.55 465.78 3.58 465.82 3.62 465.86 3.66 465.90 3.70 465.94 3.74 465.98 3.77 466.02 3.81 466.06 3.84 466.10 3.88 466.14 3.92 466.18 3.95 466.22 3.99 466.26 4.02 466.30 4.05 466.34 4.09 466.38 4.12 466.42 4.16 466.46 4.19 466.50 4.22 466.54 4.25 466.58 4.29 466.62 4.32 466.66 4.35 466.70 4.38 466.74 4.41 466.78 4.44 466.82 4.47 466.86 4.51 466.90 4.54 466.94 4.57 466.98 4.60 467.02 4.63 467.06 4.66 467.10 4.69 467.14 4.71 467.18 4.74 467.22 4.77 467.26 4.80 467.30 4.83 467.34 4.86 467.38 4.89 467.42 4.92 467.46 4.94 467.50 4.97 467.54 5.00 467.58 5.03 467.62 5.05 Elevation Primary (feet) (cfs) 467.66 5.08 467.70 5.11 467.74 5.14 467.78 5.16 467.82 5.19 467.86 5.21 467.90 5.24 467.94 5.27 467.98 5.29 468.02 5.36 468.06 5.54 468.10 5.79 468.14 6.09 468.18 6.43 468.22 6.81 468.26 7.22 468.30 7.67 468.34 8.14 468.38 8.65 468.42 9.18 468.46 9.73 468.50 10.31 468.54 10.92 468.58 11.55 468.62 12.20 468.66 12.87 468.70 13.56 468.74 14.27 468.78 15.00 468.82 15.75 468.86 16.52 468.90 17.31 468.94 18.12 468.98 18.94 469.02 19.78 469.06 20.64 469.10 21.52 469.14 22.41 469.18 23.32 469.22 24.24 469.26 25.19 469.30 26.14 469.34 26.27 469.38 26.38 469.42 26.49 469.46 26.60 469.50 26.70 Post Area #2A Type// 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 60 Stage -Area- Storage for Pond 1 P: Storage System #1 Elevation Storage (feet_ (acre -feet) 463.50 0.000 463.54 0.000 463.58 0.000 463.62 0.000 463.66 0.001 463.70 0.001 463.74 0.001 463.78 0.001 463.82 0.001 463.86 0.002 463.90 0.002 463.94 0.002 463.98 0.003 464.02 0.003 464.06 0.003 464.10 0.004 464.14 0.004 464.18 0.005 464.22 0.005 464.26 0.005 464.30 0.006 464.34 0.006 464.38 0.007 464.42 0.007 464.46 0.007 464.50 0.008 464.54 0.008 464.58 0.009 464.62 0.009 464.66 0.010 464.70 0.010 464.74 0.011 464.78 0.011 464.82 0.012 464.86 0.012 464.90 0.013 464.94 0.013 464.98 0.014 465.02 0.014 465.06 0.015 465.10 0.015 465.14 0.016 465.18 0.017 465.22 0.017 465.26 0.018 465.30 0.018 465.34 0.019 465.38 0.019 465.42 0.020 465.46 0.020 465.50 0.021 465.54 0.022 Elevation Storage (feet) (acre -feet 465.58 0.022 465.62 0.023 465.66 0.023 465.70 0.024 465.74 0.025 465.78 0.025 465.82 0.026 465.86 0.026 465.90 0.027 465.94 0.028 465.98 0.028 466.02 0.029 466.06 0.029 466.10 0.030 466.14 0.031 466.18 0.031 466.22 0.032 466.26 0.032 466.30 0.033 466.34 0.034 466.38 0.034 466.42 0.035 466.46 0.035 466.50 0.036 466.54 0.037 466.58 0.037 466.62 0.038 466.66 0.038 466.70 0.039 466.74 0.040 466.78 0.040 466.82 0.041 466.86 0.042 466.90 0.042 466.94 0.043 466.98 0.043 467.02 0.044 467.06 0.045 467.10 0.045 467.14 0.046 467.18 0.046 467.22 0.047 467.26 0.048 467.30 0.048 467.34 0.049 467.38 0.049 467.42 0.050 467.46 0.050 467.50 0.051 467.54 0.052 467.58 0.052 467.62 0.053 Elevation Storage (feet) (acre -feet) 467.66 0.053 467.70 0.054 467.74 0.054 467.78 0.055 467.82 0.056 467.86 0.056 467.90 0.057 467.94 0.057 467.98 0.058 468.02 0.058 468.06 0.059 468.10 0.059 468.14 0.060 468.18 0.060 468.22 0.061 468.26 0.061 468.30 0.062 468.34 0.062 468.38 0.063 468.42 0.063 468.46 0.064 468.50 0.064 468.54 0.065 468.58 0.065 468.62 0.065 468.66 0.066 468.70 0.066 468.74 0.067 468.78 0.067 468.82 0.068 468.86 0.068 468.90 0.068 468.94 0.069 468.98 0.069 469.02 0.069 469.06 0.070 469.10 0.070 469.14 0.070 469.18 0.071 469.22 0.071 469.26 0.071 469.30 0.071 469.34 0.072 469.38 0.072 469.42 0.072 469.46 0.072 469.50 0.072 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 61 Summary for Pond 2P: Storage System #2 (81] Warning: Exceeded Pond 1P by 2.69'@ 12.41 hrs Inflow Area = 1.900 ac, 61.58% Impervious, Inflow Depth > 4.25" for 10 -Year event Inflow = 12.50 cfs @ 12.00 hrs, Volume= 0.673 of Outflow = 4.80 cfs @ 12.18 hrs, Volume= 0.671 af, Atten= 62 %, Lag= 10.8 min Primary = 4.80 cfs @ 12.18 hrs, Volume= 0.671 of Routing by Stor -Ind method, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs Peak Elev= 467.58'@ 12.18 hrs Surf.Area= 0.032 ac Storage= 0.171 of Plug -Flow detention time= 21.3 min calculated for 0.671 of (100% of inflow) Center -of -Mass det. time= 19.8 min ( 810.9 - 791.1 ) Volume Invert Avail.Stora a Storage Description #1 462.66' 0.195 of 72.0" Round Pipe Storage L= 300.0' Device Routina Invert Outlet Devices #1 Primary 462.66' 15.0" Round Culvert L= 20.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 462.66'/462.32' S=0.0170'/' Cc= 0.900 n=0.013 Concrete sewer w /manholes & inlets, Flow Area= 1.23 sf #2 Device 1 462.66' 8.0" W x 4.0" H Vert. Orifice /Grate C= 0.600 #3 Device 1 465.91' 9.0" Vert. Orifice /Grate C= 0.600 #4 Device 1 467.56' 4.0' long Sharp- Crested Rectangular Weir 2 End Contraction(s) 1.1' Crest Height Primary OutFlow Max =4.80 cfs @ 12.18 hrs HW= 467.58' (Free Discharge) t-1= Culvert (Passes 4.80 cfs of 9.67 cfs potential flow) 113==Orifi Orifice /Grate (Orifice Controls 2.33 cfs @ 10.50 fps) ce / Grate (Orifice Controls 2.42 cfs @ 5.48 fps) Sharp- Crested Rectangular Weir (Weir Controls 0.04 cfs @ 0.48 fps) Post Area #2A Type 11 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 62 Pond 2P: Storage System #2 Hydrograph N w O 3 O LL 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) 468 467 d c 0 m w 465 464 463 Pond 2P: Storage System #2 Stage- Discharge Sharp- Cres[ed Rectangular Weir Qrifica(Grate Culvert + QriricelGrale 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) ■ Inflow ■ Primary ■ Primary Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD®10.00 s/n 06538 @2013 H droCAD Software Solutions LLC Page 63 468 467 m .'gym.. 466 c 0 m w 465 46,1 <<63 Pond 2P: Storage System #2 Stage- Area - Storage Pipe Slarage 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 016 0.17 0.18 0.19 Storage (acre -feet) AI Storage Post Area #2A Type 11 24 -hr 10 -Year Rainfall= 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD(D 10.00 sln 06538 © 2013 H droCAQ Software Solutions LLC Page 64 Hydrograph for Pond 2P: Storage System #2 Time Inflow Storage Elevation Primary (hours) (cfs) (acre -feet) (feet) (cfs) 0.00 0.00 0.000 462.66 0.00 0.50 0.00 0.000 462.66 0.00 1.00 0.00 0.000 462.66 0.00 1.50 0.00 0.000 462.66 0.00 2.00 0.00 0.000 462.66 0.00 2.50 0.00 0.000 462.66 0.00 3.00 0.00 0.000 462.66 0.00 3.50 0.00 0.000 462.66 0.00 4.00 0.00 0.000 462.66 0.00 4.50 0.01 0.000 462.68 0.00 5.00 0.02 0.000 462.71 0.01 5.50 0.03 0.000 462.74 0.03 6.00 0.04 0.001 462.75 0.04 6.50 0.05 0.001 462.77 0.05 7.00 0.07 0.001 462.79 0.06 7.50 0.08 0.001 462.80 0.08 8.00 0.09 0.001 462.81 0.09 8.50 0.12 0.002 462.83 0.11 9.00 0.16 0.002 462.86 0.15 9.50 0.19 0.002 462.88 0.18 10.00 0.24 0.003 462.90 0.22 10.50 0.33 0.003 462.95 0.31 11.00 0.49 0.005 463.02 0.45 11.50 0.85 0.009 463.22 0.66 12.00 12.48 0.127 466.37 2.68 12.50 1.18 0.132 466.52 3.08 13.00 0.67 0.084 465.33 1.69 13.50 0.51 0.045 464.36 1.32 14.00 0.40 0.018 463.54 0.90 14.50 0.35 0.005 463.03 0.47 15.00 0.31 0.004 462.95 0.32 15.50 0.28 0.003 462.93 0.28 16.00 0.24 0.003 462.92 0.25 16.50 0.22 0.003 462.91 0.23 17.00 0.21 0.003 462.90 0.21 17.50 0.20 0.002 462.89 0.20 18.00 0.19 0.002 462.88 0.19 18.50 0.17 0.002 462.87 0.18 19.00 0.16 0.002 462.87 0.16 19.50 0.15 0.002 462.86 0.15 20.00 0.14 0.002 462.85 0.14 20.50 0.13 0.002 462.84 0.13 21.00 0.13 0.002 462.84 0.13 21.50 0.13 0.002 462.84 0.13 22.00 0.12 0.002 462.84 0.12 22.50 0.12 0.002 462.84 0.12 23.00 0.12 0.002 462.84 0.12 23.50 0.12 0.002 462.83 0.12 24.00 0.11 0.002 462.83 0.11 Post Area #2A Type// 24 -hr 10 -Year Rainfall =5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCAD® 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 65 Elevation Primary (feet) (cfs) 462.66 0.00 462.70 0.01 462.74 0.03 462.78 0.06 462.82 0.10 462.86 0.15 462.90 0.22 462.94 0.29 462.98 0.38 463.02 0.45 463.06 0.50 463.10 0.55 463.14 0.59 463.18 0.63 463.22 0.67 463.26 0.70 463.30 0.73 463.34 0.76 463.38 0.79 463.42 0.82 463.46 0.85 463.50 0.88 463.54 0.90 463.58 0.93 463.62 0.95 463.66 0.98 463.70 1.00 463.74 1.02 463.78 1.04 463.82 1.07 463.86 1.09 463.90 1.11 463.94 1.13 463.98 1.15 464.02 1.17 464.06 1.19 464.10 1.21 464.14 1.23 464.18 1.24 464.22 1.26 464.26 1.28 464.30 1.30 464.34 1.32 464.38 1.33 464.42 1.35 464.46 1.37 464.50 1.38 464.54 1.40 464.58 1.42 464.62 1.43 464.66 1.45 464.70 1.46 Stage- Discharge for Pond 2P: Storage System #2 Elevation Primary feet cfs 464.74 1.48 464.78 1.49 464.82 1.51 464.86 1.53 464.90 1.54 464.94 1.56 464.98 1.57 465.02 1.58 465.06 1.60 465.10 1.61 465.14 1.63 465.18 1.64 465.22 1.65 465.26 1.67 465.30 1.68 465.34 1.70 465.38 1.71 465.42 1.72 465.46 1.74 465.50 1.75 465.54 1.76 465.58 1.78 465.62 1.79 465.66 1.80 465.70 1.81 465.74 1.83 465.78 1.84 465.82 1.85 465.86 1.86 465.90 1.88 465.94 1.89 465.98 1.92 466.02 1.96 466.06 2.01 466.10 2.07 466.14 2.14 466.18 2.21 466.22 2.30 466.26 2.39 466.30 2.49 466.34 2.59 466.38 2.70 466.42 2.81 466.46 2.92 466.50 3.03 466.54 3.13 466.58 3.23 466.62 3.33 466.66 3.40 466.70 3.48 466.74 3.55 466.78 3.62 Elevation Primary (feet) (cfs) 466.82 3.69 466.86 3.76 466.90 3.83 466.94 3.89 466.98 3.95 467.02 4.01 467.06 4.07 467.10 4.13 467.14 4.19 467.18 4.24 467.22 4.30 467.26 4.35 467.30 4.41 467.34 4.46 467.38 4.51 467.42 4.56 467.46 4.61 467.50 4.66 467.54 4.71 467.58 4.79 467.62 4.99 467.66 5.26 467.70 5.58 467.74 5.95 467.78 6.35 467.82 6.79 467.86 7.26 467.90 7.76 467.94 8.29 467.98 8.85 468.02 9.43 468.06 10.04 468.10 10.24 468.14 10.28 468.18 10.32 468.22 10.36 468.26 10.40 468.30 10.45 468.34 10.49 468.38 10.53 468.42 10.57 468.46 10.61 468.50 10.65 468.54 10.69 468.58 10.73 468.62 10.77 468.66 10.82 Post Area #2A Type 1124-hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 © 2013 HydroCAD Software Solutions LLC Pace 66 Stage -Area- Storage for Pond 2P: Storage System #2 Elevation Storage (feet) (acre -feet) 462.66 0.000 462.70 0.000 462.74 0.001 462.78 0.001 462.82 0.001 462.86 0.002 462.90 0.003 462.94 0.003 462.98 0.004 463.02 0.005 463.06 0.006 463.10 0.006 463.14 0.007 463.18 0.008 463.22 0.009 463.26 0.010 463.30 0.011 463.34 0.012 463.38 0.013 463.42 0.014 463.46 0.015 463.50 0.017 463.54 0.018 463.58 0.019 463.62 0.020 463.66 0.021 463.70 0.023 463.74 0.024 463.78 0.025 463.82 0.026 463.86 0.028 463.90 0.029 463.94 0.030 463.98 0.032 464.02 0.033 464.06 0.035 464.10 0.036 464.14 0.037 464.18 0.039 464.22 0.040 464.26 0.042 464.30 0.043 464.34 0.045 464.38 0.046 464.42 0.048 464.46 0.049 464.50 0.051 464.54 0.052 464.58 0.054 464.62 0.055 464.66 0.057 464.70 0.058 Elevation Storage (feet) (acre -feet) 464.74 0.060 464.78 0.062 464.82 0.063 464.86 0.065 464.90 0.066 464.94 0.068 464.98 0.070 465.02 0.071 465.06 0.073 465.10 0.074 465.14 0.076 465.18 0.078 465.22 0.079 465.26 0.081 465.30 0.083 465.34 0.084 465.38 0.086 465.42 0.087 465.46 0.089 465.50 0.091 465.54 0.092 465.58 0.094 465.62 0.096 465.66 0.097 465.70 0.099 465.74 0.101 465.78 0.102 465.82 0.104 465.86 0.106 465.90 0.107 465.94 0.109 465.98 0.111 466.02 0.112 466.06 0.114 466.10 0.115 466.14 0.117 466.18 0.119 466.22 0.120 466.26 0.122 466.30 0.124 466.34 0.125 466.38 0.127 466.42 0.128 466.46 0.130 466.50 0.132 466.54 0.133 466.58 0.135 466.62 0.136 466.66 0.138 466.70 0.139 466.74 0.141 466.78 0.143 Elevation Storage (feet) (acre -feet) 466.82 0.144 466.86 0.146 466.90 0.147 466.94 0.149 466.98 0.150 467.02 0.152 467.06 0.153 467.10 0.154 467.14 0.156 467.18 0.157 467.22 0.159 467.26 0.160 467.30 0.162 467.34 0.163 467.38 0.164 467.42 0.166 467.46 0.167 467.50 0.168 467.54 0.170 467.58 0.171 467.62 0.172 467.66 0.173 467.70 0.175 467.74 0.176 467.78 0,177 467.82 0.178 467.86 0.179 467.90 0.180 467.94 0.181 467.98 0.183 468.02 0.184 468.06 0.185 468.10 0.186 468.14 0.187 468.18 0.187 468.22 0.188 468.26 0189 468.30 0,190 468.34 0.191 468.38 0191 468.42 0.192 468.46 0.193 468.50 0.193 468.54 0.194 468.58 0.194 468.62 0195 468.66 0.195 Post Area #2A Type 1124 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 H droCADO 10.00 s/n 06538 © 2013 H droCAD Software Solutions LLC Page 67 Summary for Link 3L: Outfall Inflow Area = 3.360 ac, 39.88% Impervious, Inflow Depth > 3.69" for 10 -Year event Inflow = 9.49 cfs @ 12.15 hrs, Volume= 1.034 of Primary = 9.49 cfs @ 12.15 hrs, Volume= 1.034 af, Atten= 0 %, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00 -24.00 hrs, dt= 0.01 hrs 1 H w V 3 O LL Link 3L: Outfall Hydrograph 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) ■ Inflow E Primary Post Area #2A Type // 24 -hr 10 -Year Rainfall = 5.56" Prepared by TG- MOSYSCON Printed 6/20/2015 HydroCAD® 10.00 s/n 06538 @2013 HydroCAD Software Solutions LLC Page 68 Hydrograph for Link 3L: Outfall Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 5.00 0.01 0.00 0.01 5.50 0.03 0.00 0.03 6.00 0.04 0.00 0.04 6.50 0.05 0.00 0.05 7.00 0.06 0.00 0.06 7.50 0.08 0.00 0.08 8.00 0.09 0.00 0.09 8.50 0.12 0.00 0.12 9.00 0.17 0.00 0.17 9.50 0.21 0.00 0.21 10.00 0.27 0.00 0.27 10.50 0.39 0.00 0.39 11.00 0.58 0.00 0.58 11.50 0.92 0.00 0.92 12.00 5.73 0.00 5.73 12.50 4.52 0.00 4.52 13.00 2.22 0.00 2.22 13.50 1.69 0.00 1.69 14.00 1.19 0.00 1.19 14.50 0.70 0.00 0.70 15.00 0.53 0.00 0.53 15.50 0.48 0.00 0.48 16.00 0.42 0.00 0.42 16.50 0.38 0.00 0.38 17.00 0.36 0.00 0.36 17.50 0.34 0.00 0.34 18.00 0.32 0.00 0.32 18.50 0.30 0.00 0.30 19.00 0.28 0.00 0.28 19.50 0.25 0.00 0.25 20.00 0.23 0.00 0.23 20.50 0.22 0.00 0.22 21.00 0.22 0.00 0.22 21.50 0.21 0.00 0.21 22.00 0.21 0.00 0.21 22.50 0.20 0.00 0.20 23.00 0.20 0.00 0.20 23.50 0.20 0.00 0.20 24.00 0.19 0.00 0.19