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Existing Drainage CalculationsSubcatchment 1 CITY OF CHANHASSEN RECEIVED AUG 2 0 2010 Subcatchment 2 CHANHASSEN PLAWINING DEPT Subcatchment 3 Subcat Reach :.Pon LICIk` EXISTING 5 -27 -10 Type// 24 -hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 2 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Dyn -Stor -Ind method - Pond routing by Dyn -Stor -Ind method Subcatchment 1S: Subcatchment 1 RunoffArea= 33.030 ac Runoff Depth = 0.87" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff =29.94 cfs 2.391 of Subcatchment 2S: Subcatchment 2 Runoff Area =2.800 ac Runoff Depth = 0.92" Flow Length =315' Tc =5.7 min CN =78 Runoff =4.64 cfs 0.215 of Subcatchment 3S: Subcatchment 3 Runoff Area = 24.950 ac Runoff Depth = 0.87" Flow Length= 1,180' Tc =14.6 min CN =77 Runoff =27.36 cfs 1.806 of Total Runoff Area = 60.780 ac Runoff Volume = 4.412 of Average Runoff Depth = 0.87" EXISTING 5 -27 -10 Type // 24 -hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 3 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment IS: Subcatchment 1 Runoff = 29.94 cfs @ 12.15 hrs, Volume= 2.391 af, Depth= 0.87" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 year Rainfall= 2.70" Area (ac) CN Description 2.790 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 24.090 78 Row crops, straight row, Good, HSG B 33.030 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.3 2,440 0.1220 2.0 Lag /CN Method, Subcatchment IS: Subcatchment 1 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type// 24 -hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 4 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment 2S: Subcatchment 2 Runoff = 4.64 cfs @ 11.98 hrs, Volume= 0.215 af, Depth= 0.92" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 year Rainfall= 2.70" Area (ac) CN Description 2.640 78 Row crops, straight row, Good, HSG B 0.160 85 Wetland 2.800 78 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.7 315 0.0555 0.9 Lag /CN Method, ® Runoff 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type 11 24 -hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 5 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/2012010 Subcatchment 3S: Subcatchment 3 Runoff = 27.36 cfs @ 12.08 hrs, Volume= 1.806 af, Depth= 0.87" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 2 year Rainfall= 2.70" Area (ac) CN Description 23.360 78 Row crops, straight row, Good, HSG B 0.260 85 Wetland 1.330 55 Woods, Good, HSG B 24.950 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, Subcatchment 3S: Subcatchment 3 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type 11 24 -hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 6 HydroCADO 7.00 s/n 000744 01986 -2003 Applied Microcomputer Systems 8/20/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Dyn -Stor -Ind method - Pond routing by Dyn -Stor -Ind method Subcatchment 1S: Subcatchment 1 RunoffArea= 33.030 ac Runoff Depth= 1.97" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff =71.31 cfs 5.421 of Subcatchment 2S: Subcatchment 2 Runoff Area =2.800 ac Runoff Depth= 2.05" Flow Length =315' Tc =5.7 min CN =78 Runoff =10.37 cfs 0.478 of Subcatchment 3S: Subcatchment 3 Runoff Area = 24.950 ac Runoff Depth= 1.97" Flow Length= 1,180' Tc =14.6 min CN =77 Runoff =64.39 cfs 4.095 of Total Runoff Area = 60.780 ac Runoff Volume = 9.994 of Average Runoff Depth =1.97' EXISTING 5 -27 -10 Type// 24 -hr 10 year Rainfall= 4.20" Prepared by {enter your company name here) Page 7 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment IS: Subcatchment 1 Runoff = 71.31 cfs @ 12.13 hrs, Volume= 5.421 af, Depth= 1.97" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 year Rainfall= 4.20" Area (ac) CN Descriotion 2.790 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 24.090 78 Row crops, straight row, Good, HSG B 33.030 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.3 2,440 0.1220 2.0 Lag /CN Method, Subcatchment IS: Subcatchment 1 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type 1124 -hr 10 year Rainfall = 4.20" Prepared by {enter your company name here) Page 8 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment 2S: Subcatchment 2 Runoff = 10.37 cfs @ 11.97 hrs, Volume= 0.478 af, Depth= 2.05" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 year Rainfall= 4.20" Area (ac) CN Description 2.640 78 Row crops, straight row, Good, HSG B 0.160 85 Wetland 2.800 78 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.7 315 0.0555 0.9 Lag /CN Method, Subcatchment 2S: Subcatchment 2 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type// 24 -hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 9 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment 3S: Subcatchment 3 Runoff = 64.39 cfs @ 12.07 hrs, Volume= 4.095 af, Depth= 1.97" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 10 year Rainfall= 4.20" Area (ac) CN Description 23.360 78 Row crops, straight row, Good, HSG B 0.260 85 Wetland 1.330 55 Woods, Good, HSG B 24.950 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, Subcatchment 3S: Subcatchment 3 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type// 24 -hr 100 year Rainfall = 6.00" Prepared by {enter your company name here} Page 10 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Dyn -Stor -Ind method - Pond routing by Dyn -Stor -Ind method Subcatchment 1S: Subcatchment 1 RunoffArea= 33.030 ac Runoff Depth= 3.48" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff = 126.71 cfs 9.576 of Subcatchment 2S: Subcatchment 2 Runoff Area =2.800 ac Runoff Depth= 3.58" Flow Length =315' Tc =5.7 min CN =78 Runoff =17.82 cfs 0.835 of Subcatchment 3S: Subcatchment 3 Runoff Area = 24.950 ac Runoff Depth= 3.48" Flow Length= 1,180' Tc =14.6 min CN =77 Runoff= 113.72 cfs 7.234 of Total Runoff Area = 60.780 ac Runoff Volume = 17.645 of Average Runoff Depth = 3.48" EXISTING 5 -27 -10 Type // 24 -hr 100 year Rainfall= 6. 00 " Prepared by {enter your company name here} Page 11 HydroCADO 7.00 s/n 000744 0 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment IS: Subcatchment 1 Runoff = 126.71 cfs @ 12.13 hrs, Volume= 9.576 af, Depth= 3.48" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 year Rainfall= 6.00" Area (ac) CN Description 2.790 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 24.090 78 Row crops, straight row, Good, HSG B 33.030 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.3 2,440 0.1220 2.0 Lag /CN Method, Subcatchment IS: Subcatchment 1 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type 1124 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 12 HydroCADO 7.00 s/n 000744 0 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment 2S: Subcatchment 2 Runoff = 17.82 cfs @ 11.97 hrs, Volume= 0.835 af, Depth= 3.58" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 year Rainfall= 6.00" Area (ac) CN Description 2.640 78 Row crops, straight row, Good, HSG B 0.160 85 Wetland 2.800 78 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.7 315 0.0555 0.9 Lag /CN Method, Subcatchment 2S: Subcatchment 2 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours) EXISTING 5 -27 -10 Type// 24 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 13 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 8/20/2010 Subcatchment 3S: Subcatchment 3 Runoff = 113.72 cfs @ 12.07 hrs, Volume= 7.234 af, Depth= 3.48" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 100 year Rainfall= 6.00" Area (ac) CN Description 23.360 78 Row crops, straight row, Good, HSG B 0.260 85 Wetland 1.330 55 Woods. Good. HSG B 24.950 77 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, Subcatchment 3S: Subcatchment 3 Hydrograph 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Time (hours)