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SUB201500112 Calculations 2015-09-11 (2)
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)