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Drainage Calculations 6-4-10 a K 1S Subcatchment 1 2S Subcatchment 2 CITY OF CHANHASSEN 3 S RECEIVED JUN 0 4 2010 CHANHASSFN PLAtJNING DEPT Subcatchment 3 (Subc Reach .Pon Link '; Drainage Diagram for EXISTING 5 -27 -10 Prepared by {enter your company name here} 6/4/2010 HydroCAD® 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems Y EXISTING 5 - - Type 11 24-hr 1 year Rainfall = 2.30" Prepared by {enter your company name here} Page 2 HydroCAD© 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 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 Runoff Area = 33.030 ac Runoff Depth = 0.62" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff =20.41 cfs 1.701 af Subcatchment 2S: Subcatchment 2 Runoff Area =2.800 ac Runoff Depth = 0.66" Flow Length =315' Tc =5.7 min CN =78 Runoff =3.29 cfs 0.154 af Subcatchment 3S: Subcatchment 3 Runoff Area = 24.950 ac Runoff Depth = 0.62" Flow Length= 1,180' Tc =14.6 min CN =77 Runoff =18.78 cfs 1.285 af Y EXISTING 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 3 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: Subcatchment 1 Runoff = 20.41 cfs @ 12.15 hrs, Volume= 1.701 af, Depth= 0.62" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 1124 1 year Rainfall= 2.30" 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 2S: Subcatchment 2 Runoff = 3.29 cfs @ 11.98 hrs, Volume= 0.154 af, Depth= 0.66" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 1124 1 year Rainfall= 2.30" 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 3S: Subcatchment 3 Runoff = 18.78 cfs @ 12.08 hrs, Volume= 1.285 af, Depth= 0.62" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 1124 1 year Rainfall= 2.30" 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 f EXISTING 5 - - Type 1124 -hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 4 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, EXISTING 5 - - Type 11 24-hr 2 year Rainfall = 2.70" Prepared by {enter your company name here} Page 5 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 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 af 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 af 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 a EXISTING 5 - - Type 1124 -hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 6 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: 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 11 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 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, 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 11 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 , EXISTING 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 7 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, EXISTING 5 - - Type 11 24-hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 8 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 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 Runoff Area = 33.030 ac Runoff Depth= 1.97" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff =71.31 cfs 5.421 af 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 af 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 EXISTING 5 - - Type 1124 -hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 9 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: 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 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 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 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 EXISTING 5 - - Type 11 24-hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 10 HydroCAD© 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, EXISTING 5 - - Type 11 24-hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 11 HydroCAD® 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 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 Runoff Area = 33.030 ac Runoff Depth= 3.48" Flow Length= 2,440' Tc =20.3 min CN =77 Runoff = 126.71 cfs 9.576 af 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 af 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 EXISTING 5 - - Type 11 24-hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 12 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: 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 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 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 EXISTING 5 - - Type 1124 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 13 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.6 1,180 0.0740 1.3 Lag /CN Method, i K ) SUB / 1 TO DITCH SUB 8 OFF -SITE (i os) P d < S ) 7P MITIGATION AREA #1 SUB MIT AAREA SE SUB SE FOND SE OFF-SITE 0 6S 6P , A TEROFSITE SW SUB SW POND (11S) NORTH POND (4S) c 5S ) SE OFF -SITE NE OFF -SITE NE OFF-SITE SE OFF -OSITE (S ubca) Reach Pon Link Drainage Diagram for PROPOSED 5 -27 -10 Prepared by {enter your company name here} 6/4/2010 HydroCAD® 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 2 HydroCAD© 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Sim -Route method - Pond routing by Sim -Route method Subcatchment 1S: SUB 1 TO DITCH RunoffArea= 13.380 ac Runoff Depth = 0.40" Flow Length =160' Tc =23.3 min CN =71 Runoff =3.98 cfs 0.441 af Subcatchment 2S: CENTER OF SITE Runoff Area = 22.260 ac Runoff Depth = 0.50" Flow Length =955' Tc =15.0 min CN =74 Runoff =12.49 cfs 0.926 af Subcatchment 3S: NE OFF -SITE Runoff Area =0.530 ac Runoff Depth = 0.80" Flow Length =70' Tc =10.4 min CN =81 Runoff =0.64 cfs 0.035 af Subcatchment 4S: NE OFF -SITE Runoff Area =0.380 ac Runoff Depth = 0.91" Tc =3.0 min CN =83 Runoff =0.69 cfs 0.029 af Subcatchment 5S: SE OFF -OSITE Runoff Area =7.350 ac Runoff Depth = 0.12" Flow Length =300' Tc =44.0 min CN =60 Runoff =0.17 cfs 0.075 af Subcatchment 6S: SW SUB Runoff Area =2.280 ac Runoff Depth = 0.75" Tc =5.0 min CN =80 Runoff =3.18 cfs 0.143 af Subcatchment 7S: SE SUB Runoff Area =9.480 ac Runoff Depth = 0.54" Flow Length =560' Tc =11.0 min CN =75 Runoff =6.92 cfs 0.424 af Subcatchment 8S: SUB 8 OFF -SITE Runoff Area =1.300 ac Runoff Depth = 0.25" Flow Length =60' Tc =6.9 min CN =66 Runoff =0.38 cfs 0.027 af Subcatchment 9S: SUB MIT AREA Runoff Area =1.890 ac Runoff Depth = 0.40" Flow Length =160' Tc =11.9 min CN =71 Runoff =0.87 cfs 0.062 of Subcatchment 10S: SE OFF -SITE Runoff Area =0.880 ac Runoff Depth = 0.43" Tc =5.0 min CN =72 Runoff =0.63 cfs 0.031 af Subcatchment 11S: SE OFF -SITE RunoffArea =0.450 ac Runoff Depth = 0.71" Tc =5.0 min CN =79 Runoff =0.58 cfs 0.026 af Pond 2P: NORTH POND Peak EIev= 867.02' Storage =3.130 af Inflow =12.49 cfs 0.926 af Outflow =1.13 cfs 0.908 af Pond 6P: SW POND Peak Elev= 917.48' Storage =1.156 af Inflow =3.30 cfs 0.566 af Outflow =0.88 cfs 0.561 af Pond 7P: SE POND Peak EIev= 927.60' Storage =0.532 af Inflow =6.92 cfs 0.424 af Outflow =1.76 cfs 0.423 af Pond 9P: MITIGATION AREA #1 Peak EIev= 865.14' Storage =0.261 af Inflow =0.87 cfs 0.062 af Outflow =0.22 cfs 0.062 af 4 k PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 3 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: SUB 1 TO DITCH Runoff = 3.98 cfs @ 12.20 hrs, Volume= 0.441 af, Depth= 0.40" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 1.600 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 5.180 61 >75% Grass cover, Good, HSG B 0.450 98 Rooftops 13.380 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.3 160 0.0185 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 2S: CENTER OF SITE Runoff = 12.49 cfs @ 12.09 hrs, Volume= 0.926 af, Depth= 0.50" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 3.420 98 Rooftops 2.260 98 Roadway 1.300 98 Driveway 0.190 98 Sidewalk 0.680 98 Open water 14.410 61 >75% Grass cover, Good, HSG B 22.260 74 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ( ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.5 75 0.0300 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.0 125 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.5 755 5.0 Direct Entry, Pipe flow @ 5 fps 15.0 955 Total 1. PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 4 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 3S: NE OFF -SITE Runoff = 0.64 cfs @ 12.03 hrs, Volume= 0.035 af, Depth= 0.80" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.090 98 Rooftop 0.100 98 Roadway 0.080 98 Driveway 0.020 98 Sidewalk 0.240 61 >75% Grass cover, Good, HSG B 0.530 81 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 8.9 70 0.0400 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 0.5 Direct Entry, Gutter flow (a7 3 fps 10.4 70 Total Subcatchment 4S: NE OFF -SITE Runoff = 0.69 cfs @ 11.94 hrs, Volume= 0.029 af, Depth= 0.91" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.170 98 Roadway 0.060 98 Sidewalk 0.150 61 >75% Grass cover, Good, HSG B 0.380 83 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.0 Direct Entry, Subcatchment 5S: SE OFF -OSITE Runoff = 0.17 cfs @ 12.77 hrs, Volume= 0.075 af, Depth= 0.12" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 1 year Rainfall= 2.30" 1 PROPOSED 5 - - Type 11 24-hr 1 year Rainfall = 2.30" Prepared by {enter your company name here} Page 5 HydroCAD® 7.00 sin 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Area (ac) CN Description 0.950 55 Woods, Good, HSG B 6.400 61 >75% Grass cover, Good, HSG B 7.350 60 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 44.0 300 0.0133 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 6S: SW SUB Runoff = 3.18 cfs @ 11.97 hrs, Volume= 0.143 af, Depth= 0.75" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.460 98 Roadway 0.150 98 Sidewalk 0.340 98 Open water 1.140 61 >75% Grass cover, Good, HSG B 0.190 98 Parking lot 2.280 80 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Gutter flow @ 3 fps Subcatchment 7S: SE SUB Runoff = 6.92 cfs @ 12.04 hrs, Volume= 0.424 af, Depth= 0.54" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 1.410 98 Rooftop 1.090 98 Roadway 0.520 98 Driveway 0.160 98 Sidewalk 0.360 98 Open water 5.940 61 >75% Grass cover, Good, HSG B 9.480 75 Weighted Average A PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 6 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 55 0.0270 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.3 160 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 1.1 345 5.0 Direct Entry, Pipe flow A 5 fps 11.0 560 Total Subcatchment 8S: SUB 8 OFF -SITE Runoff = 0.38 cfs @ 12.02 hrs, Volume= 0.027 af, Depth= 0.25" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 1.120 61 >75% Grass cover, Good, HSG B 0.180 98 Rooftop 1.300 66 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 5.9 60 0.0800 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 6.9 60 Total Subcatchment 9S: SUB MIT AREA Runoff = 0.87 cfs @ 12.06 hrs, Volume= 0.062 af, Depth= 0.40" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 1.380 61 >75% Grass cover, Good, HSG B 0.090 98 Rooftop 0.420 98 Mitigation Wetland 1.890 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.9 160 0.1250 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 11.9 160 Total PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 7 HydroCADO 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 10S: SE OFF -SITE Runoff = 0.63 cfs @ 11.98 hrs, Volume= 0.031 af, Depth= 0.43" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type II 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.250 98 IMPERVIOUS 0.630 61 >75% Grass cover, Good, HSG B 0.880 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: SE OFF -SITE Runoff = 0.58 cfs @ 11.97 hrs, Volume= 0.026 af, Depth= 0.71" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 1 year Rainfall= 2.30" Area (ac) CN Description 0.220 98 IMPERVIOUS 0.230 61 >75% Grass cover, Good, HSG B 0.450 79 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Pond 2P: NORTH POND Inflow Area = 22.260 ac, Inflow Depth = 0.50" for 1 year event Inflow = 12.49 cfs @ 12.09 hrs, Volume= 0.926 of Outflow = 1.13 cfs @ 13.58 hrs, Volume= 0.908 af, Atten= 91%, Lag= 89.3 min Primary = 1.13 cfs @ 13.58 hrs, Volume= 0.908 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 866.50' Surf.Area= 0.690 ac Storage= 2.745 af Peak Elev= 867.02' @ 13.58 hrs Surf.Area= 0.725 ac Storage= 3.130 af (0.385 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 858.00' 6.595 af Custom Stage Data (Prismatic) Listed below PROPOSED 5 - - Type 11 24-hr 1 year Rainfall = 2.30" Prepared by {enter your company name here} Page 8 HydroCAD® 7.00 sin 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 858.00 0.140 0.000 0.000 860.00 0.210 0.350 0.350 862.00 0.280 0.490 0.840 864.00 0.370 0.650 1.490 866.00 0.570 0.940 2.430 866.50 0.690 0.315 2.745 868.00 0.790 1.110 3.855 870.00 0.950 1.740 5.595 871.00 1.050 1.000 6.595 # Routing Invert Outlet Devices 1 Primary 866.50' 18.0" x 21.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 866.30' S= 0.0095 7' n= 0.013 Cc= 0.900 2 Device 1 864.00' 15.0" x 30.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 864.30' S= - 0.0100'/' n= 0.013 Cc= 0.900 Primary OutFlow Max =1.13 cfs @ 13.58 hrs HW= 867.02' (Free Discharge) t-1= Culvert (Barrel Controls 1.13 cfs @ 3.1 fps) t-2= Culvert (Passes 1.13 cfs of 4.26 cfs potential flow) Pond 6P: SW POND Inflow Area = 11.760 ac, Inflow Depth = 0.58" for 1 year event Inflow = 3.30 cfs @ 11.97 hrs, Volume= 0.566 of Outflow = 0.88 cfs @ 13.63 hrs, Volume= 0.561 af, Atten= 73 %, Lag= 99.4 min Primary = 0.88 cfs @ 13.63 hrs, Volume= 0.561 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 917.00' Surf.Area= 0.340 ac Storage= 0.985 af Peak Elev= 917.48' @ 13.63 hrs Surf.Area= 0.354 ac Storage= 1.156 af (0.171 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) • Invert Avail.Storage Storage Description 1 912.00' 2.640 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 912.00 0.130 0.000 0.000 914.00 0.170 0.300 0.300 916.00 0.230 0.400 0.700 917.00 0.340 0.285 0.985 918.00 0.370 0.355 1.340 920.00 0.450 0.820 2.160 921.00 0.510 0.480 2.640 # Routing Invert Outlet Devices 1 Primary 910.00' 12.0" x 74.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 909.50' S= 0.0068'/' n= 0.013 Cc= 0.900 PROPOSED 5 - - Type 11 24-hr 1 year Rainfall = 2.30" Prepared by {enter your company name here} Page 9 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 2 Device 1 914.50' 12.0" x 26.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= - 0.0962 '/' n= 0.013 Cc= 0.900 Primary OutFlow Max =0.88 cfs @ 13.63 hrs HW= 917.48' (Free Discharge) L1= Culvert (Passes 0.88 cfs of 8.52 cfs potential flow) L2= Culvert (Inlet Controls 0.88 cfs @ 2.4 fps) Pond 7P: SE POND Inflow Area = 9.480 ac, Inflow Depth = 0.54" for 1 year event Inflow = 6.92 cfs @ 12.04 hrs, Volume= 0.424 of Outflow = 1.76 cfs @ 12.30 hrs, Volume= 0.423 af, Atten= 75 %, Lag= 15.7 min Primary = 1.76 cfs @ 12.30 hrs, Volume= 0.423 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 927.00' Surf.Area= 0.170 ac Storage= 0.411 af Peak Elev= 927.60' @ 12.30 hrs Surf.Area= 0.206 ac Storage= 0.532 af (0.121 af above start) Plug -Flow detention time= 1,676.5 min calculated for 0.012 af (3% of inflow) Center -of -Mass det. time= 116.2 min ( 999.9 - 883.6 ) # Invert Avail.Storage Storage Description 1 922.00' 1.594 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 922.00 0.010 0.000 0.000 924.00 0.072 0.082 0.082 926.00 0.115 0.187 0.269 927.00 0.170 0.142 0.411 928.00 0.230 0.200 0.611 929.50 0.373 0.452 1.064 930.00 0.570 0.236 1.299 930.50 0.610 0.295 1.594 # Routing Invert Outlet Devices 1 Primary 917.90' 18.0" x 138.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= 0.0065'1' n= 0.013 Cc= 0.900 2 Device 1 924.50' 18.0" x 33.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 927.00' S= - 0.0758'/' n= 0.013 Cc= 0.900 Primary OutFlow Max =1.76 cfs @ 12.30 hrs HW= 927.60' TW= 917.26' (Dynamic Tailwater) L1= Culvert (Passes 1.76 cfs of 21.33 cfs potential flow) L2= Culvert (Inlet Controls 1.76 cfs @ 2.6 fps) Pond 9P: MITIGATION AREA #1 Inflow Area = 1.890 ac, Inflow Depth = 0.40" for 1 year event Inflow = 0.87 cfs @ 12.06 hrs, Volume= 0.062 of Outflow = 0.22 cfs @ 12.39 hrs, Volume= 0.062 af, Atten= 74 %, Lag= 19.4 min Primary = 0.22 cfs @ 12.39 hrs, Volume= 0.062 af PROPOSED 5 - - Type 11 24-hr 1 year Rainfall= 2.30" Prepared by {enter your company name here} Page 10 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 865.10' Surf.Area= 0.324 ac Storage= 0.246 af Peak Elev= 865.14' @ 12.39 hrs Surf.Area= 0.334 ac Storage= 0.261 af (0.015 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) Invert Avail.Storage Storage Description 1 864.00' 2.245 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 864.00 0.120 0.000 0.000 865.00 0.300 0.210 0.210 865.50 0.420 0.180 0.390 866.00 7.000 1.855 2.245 # Routing Invert Outlet Devices 1 Primary 865.10' 10.0' long x 20.0' breadth Broad - Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max =0.22 cfs @ 12.39 hrs HW= 865.14' (Free Discharge) L1= Broad - Crested Rectangular Weir (Weir Controls 0.22 cfs @ 0.5 fps) PROPOSED 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 11 HydroCAD® 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Sim -Route method - Pond routing by Sim -Route method Subcatchment 1S: SUB 1 TO DITCH RunoffArea= 13.380 ac Runoff Depth = 0.59" Flow Length =160' Tc =23.3 min CN =71 Runoff =6.77 cfs 0.663 af Subcatchment 2S: CENTER OF SITE Runoff Area = 22.260 ac Runoff Depth = 0.72" Flow Length =955' Tc =15.0 min CN =74 Runoff =19.33 cfs 1.343 af Subcatchment 3S: NE OFF -SITE Runoff Area =0.530 ac Runoff Depth= 1.09" Flow Length =70' Tc =10.4 min CN =81 Runoff =0.87 cfs 0.048 af Subcatchment 4S: NE OFF -SITE Runoff Area =0.380 ac Runoff Depth= 1.21" Tc =3.0 min CN =83 Runoff =0.92 cfs 0.038 af Subcatchment 5S: SE OFF -OSITE Runoff Area =7.350 ac Runoff Depth = 0.23" Flow Length =300' Tc =44.0 min CN =60 Runoff =0.51 cfs 0.142 af Subcatchment 6S: SW SUB Runoff Area =2.280 ac Runoff Depth= 1.03" Tc =5.0 min CN =80 Runoff =4.37 cfs 0.196 of Subcatchment 7S: SE SUB Runoff Area =9.480 ac Runoff Depth = 0.77" Flow Length =560' Tc =11.0 min CN =75 Runoff =10.38 cfs 0.609 af Subcatchment 8S: SUB 8 OFF-SITE Runoff Area =1.300 ac Runoff Depth = 0.41" Flow Length =60' Tc =6.9 min CN =66 Runoff =0.75 cfs 0.044 af Subcatchment 9S: SUB MIT AREA Runoff Area =1.890 ac Runoff Depth = 0.59" Flow Length =160' Tc =11.9 min CN =71 Runoff =1.44 cfs 0.094 of Subcatchment 10S: SE OFF-SITE Runoff Area =0.880 ac Runoff Depth = 0.64" Tc =5.0 min CN =72 Runoff =0.99 cfs 0.047 af Subcatchment 11S: SE OFF -SITE Runoff Area =0.450 ac Runoff Depth = 0.97" Tc =5.0 min CN =79 Runoff =0.81 cfs 0.037 af Pond 2P: NORTH POND Peak Elev= 867.24' Storage =3.296 af Inflow =19.33 cfs 1.343 af Outflow =2.11 cfs 1.324 af Pond 6P: SW POND Peak Elev= 917.68' Storage =1.225 af Inflow =4.86 cfs 0.803 af Outflow =1.59 cfs 0.798 af Pond 7P: SE POND Peak Elev= 927.88' Storage =0.587 af Inflow =10.38 cfs 0.609 af Outflow =3.42 cfs 0.607 af Pond 9P: MITIGATION AREA #1 Peak Elev= 865.17' Storage =0.270 af Inflow =1.44 cfs 0.094 af Outflow =0.45 cfs 0.094 af w PROPOSED 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 12 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: SUB 1 TO DITCH Runoff = 6.77 cfs @ 12.19 hrs, Volume= 0.663 af, Depth= 0.59" 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 1.600 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 5.180 61 >75% Grass cover, Good, HSG B 0.450 98 Rooftops 13.380 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.3 160 0.0185 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 2S: CENTER OF SITE Runoff = 19.33 cfs @ 12.08 hrs, Volume= 1.343 af, Depth= 0.72" 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 3.420 98 Rooftops 2.260 98 Roadway 1.300 98 Driveway 0.190 98 Sidewalk 0.680 98 Open water 14.410 61 >75% Grass cover, Good, HSG B 22.260 74 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ( ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.5 75 0.0300 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.0 125 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.5 755 5.0 Direct Entry, Pipe flow @ 5 fps 15.0 955 Total . • PROPOSED 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 13 HydroCAD© 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 3S: NE OFF -SITE Runoff = 0.87 cfs @ 12.03 hrs, Volume= 0.048 af, Depth= 1.09" 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 0.090 98 Rooftop 0.100 98 Roadway 0.080 98 Driveway 0.020 98 Sidewalk 0.240 61 >75% Grass cover, Good, HSG B 0.530 81 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 8.9 70 0.0400 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 0.5 Direct Entry, Gutter flow @ 3 fps 10.4 70 Total Subcatchment 4S: NE OFF -SITE Runoff = 0.92 cfs @ 11.94 hrs, Volume= 0.038 af, Depth= 1.21" 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 0.170 98 Roadway 0.060 98 Sidewalk 0.150 61 >75% Grass cover, Good, HSG B 0.380 83 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.0 Direct Entry, Subcatchment 5S: SE OFF -OSITE Runoff = 0.51 cfs @ 12.62 hrs, Volume= 0.142 af, Depth= 0.23" 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" PROPOSED 5 - - Type 11 24-hr 2 year Rainfall =2.70" Prepared by {enter your company name here} Page 14 HydroCAD® 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Area (ac) CN Description 0.950 55 Woods, Good, HSG B 6.400 61 >75% Grass cover, Good, HSG B 7.350 60 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 44.0 300 0.0133 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 6S: SW SUB Runoff = 4.37 cfs @ 11.97 hrs, Volume= 0.196 af, Depth= 1.03" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 2 year Rainfall= 2.70" Area (ac) CN Description 0.460 98 Roadway 0.150 98 Sidewalk 0.340 98 Open water 1.140 61 >75% Grass cover, Good, HSG B 0.190 98 Parking lot 2.280 80 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Gutter flow @ 3 fps Subcatchment 7S: SE SUB Runoff = 10.38 cfs @ 12.04 hrs, Volume= 0.609 af, Depth= 0.77" 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 1.410 98 Rooftop 1.090 98 Roadway 0.520 98 Driveway 0.160 98 Sidewalk 0.360 98 Open water 5.940 61 >75% Grass cover, Good, HSG B 9.480 75 Weighted Average PROPOSED 5 - - Type 11 24-hr 2 year Rainfall = 2.70" Prepared by {enter your company name here} Page 15 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 55 0.0270 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.3 160 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 1.1 345 5.0 Direct Entry, Pipe flow A 5 fps 11.0 560 Total Subcatchment 8S: SUB 8 OFF -SITE Runoff = 0.75 cfs @ 12.01 hrs, Volume= 0.044 af, Depth= 0.41" 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 1.120 61 >75% Grass cover, Good, HSG B 0.180 98 Rooftop 1.300 66 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ( ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 5.9 60 0.0800 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 6.9 60 Total Subcatchment 9S: SUB MIT AREA Runoff = 1.44 cfs @ 12.05 hrs, Volume= 0.094 af, Depth= 0.59" 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 1.380 61 >75% Grass cover, Good, HSG B 0.090 98 Rooftop 0.420 98 Mitigation Wetland 1.890 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.9 160 0.1250 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 11.9 160 Total 4 p PROPOSED 5 - - Type 11 24-hr 2 year Rainfall =2.70" Prepared by {enter your company name here} Page 16 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 10S: SE OFF -SITE Runoff = 0.99 cfs @ 11.97 hrs, Volume= 0.047 af, Depth= 0.64" 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 0.250 98 IMPERVIOUS 0.630 61 >75% Grass cover, Good, HSG B 0.880 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: SE OFF -SITE Runoff = 0.81 cfs @ 11.97 hrs, Volume= 0.037 af, Depth= 0.97" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 2 year Rainfall= 2.70" Area (ac) CN Description 0.220 98 IMPERVIOUS 0.230 61 >75% Grass cover, Good, HSG B 0.450 79 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Pond 2P: NORTH POND Inflow Area = 22.260 ac, Inflow Depth = 0.72" for 2 year event Inflow = 19.33 cfs @ 12.08 hrs, Volume= 1.343 of Outflow = 2.11 cfs @ 13.01 hrs, Volume= 1.324 af, Atten= 89 %, Lag= 55.4 min Primary = 2.11 cfs @ 13.01 hrs, Volume= 1.324 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 866.50' Surf.Area= 0.690 ac Storage= 2.745 af Peak Elev= 867.24' @ 13.01 hrs Surf.Area= 0.740 ac Storage= 3.296 af (0.551 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 858.00' 6.595 af Custom Stage Data (Prismatic) Listed below PROPOSED 5 - - Type 11 24-hr 2 year Rainfall =2.70" Prepared by {enter your company name here} Page 17 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 858.00 0.140 0.000 0.000 860.00 0.210 0.350 0.350 862.00 0.280 0.490 0.840 864.00 0.370 0.650 1.490 866.00 0.570 0.940 2.430 866.50 0.690 0.315 2.745 868.00 0.790 1.110 3.855 870.00 0.950 1.740 5.595 871.00 1.050 1.000 6.595 # Routing Invert Outlet Devices 1 Primary 866.50' 18.0" x 21.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 866.30' S= 0.0095'/' n= 0.013 Cc= 0.900 2 Device 1 864.00' 15.0" x 30.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 864.30' S= - 0.0100'1' n= 0.013 Cc= 0.900 Primary OutFlow Max =2.11 cfs @ 13.01 hrs HW= 867.24' (Free Discharge) t-1= Culvert (Barrel Controls 2.11 cfs @ 3.5 fps) t-2= Culvert (Passes 2.11 cfs of 5.10 cfs potential flow) Pond 6P: SW POND Inflow Area = 11.760 ac, Inflow Depth = 0.82" for 2 year event Inflow = 4.86 cfs @ 11.98 hrs, Volume= 0.803 af Outflow = 1.59 cfs @ 13.19 hrs, Volume= 0.798 af, Atten= 67 %, Lag= 72.6 min Primary = 1.59 cfs @ 13.19 hrs, Volume= 0.798 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 917.00' Surf.Area= 0.340 ac Storage= 0.985 af Peak Elev= 917.68' @ 13.19 hrs Surf.Area= 0.360 ac Storage= 1.225 af (0.240 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 912.00' 2.640 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 912.00 0.130 0.000 0.000 914.00 0.170 0.300 0.300 916.00 0.230 0.400 0.700 917.00 0.340 0.285 0.985 918.00 0.370 0.355 1.340 920.00 0.450 0.820 2.160 921.00 0.510 0.480 2.640 # Routing Invert Outlet Devices 1 Primary 910.00' 12.0" x 74.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 909.50' S= 0.0068'/' n= 0.013 Cc= 0.900 PROPOSED 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 18 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 2 Device 1 914.50' 12.0" x 26.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= - 0.0962 '1' n= 0.013 Cc= 0.900 Primary OutFlow Max =1.59 cfs @ 13.19 hrs HW= 917.68' (Free Discharge) t-1= Culvert (Passes 1.59 cfs of 8.64 cfs potential flow) t-2= Culvert (Inlet Controls 1.59 cfs @ 2.8 fps) Pond 7P: SE POND Inflow Area = 9.480 ac, Inflow Depth = 0.77" for 2 year event Inflow = 10.38 cfs @ 12.04 hrs, Volume= 0.609 of Outflow = 3.42 cfs @ 12.23 hrs, Volume= 0.607 af, Atten= 67 %, Lag= 11.6 min Primary = 3.42 cfs @ 12.23 hrs, Volume= 0.607 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 927.00' Surf.Area= 0.170 ac Storage= 0.411 af Peak Elev= 927.88' @ 12.23 hrs Surf.Area= 0.223 ac Storage= 0.587 af (0.175 af above start) Plug -Flow detention time= 585.6 min calculated for 0.196 af (32% of inflow) Center -of -Mass det. time= 94.0 min ( 965.2 - 871.2 ) # Invert Avail.Storage Storage Description 1 922.00' 1.594 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 922.00 0.010 0.000 0.000 924.00 0.072 0.082 0.082 926.00 0.115 0.187 0.269 927.00 0.170 0.142 0.411 928.00 0.230 0.200 0.611 929.50 0.373 0.452 1.064 930.00 0.570 0.236 1.299 930.50 0.610 0.295 1.594 # Routing Invert Outlet Devices 1 Primary 917.90' 18.0" x 138.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= 0.0065 '/' n= 0.013 Cc= 0.900 2 Device 1 924.50' 18.0" x 33.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 927.00' S= - 0.0758 '1' n= 0.013 Cc= 0.900 Primary OutFlow Max =3.42 cfs @ 12.23 hrs HW= 927.88' TW= 917.38' (Dynamic Tailwater) t Culvert (Passes 3.42 cfs of 21.65 cfs potential flow) t-2= Culvert (Inlet Controls 3.42 cfs @ 3.2 fps) Pond 9P: MITIGATION AREA #1 Inflow Area = 1.890 ac, Inflow Depth = 0.59" for 2 year event Inflow = 1.44 cfs @ 12.05 hrs, Volume= 0.094 of Outflow = 0.45 cfs @ 12.29 hrs, Volume= 0.094 af, Atten= 69 %, Lag= 13.9 min Primary = 0.45 cfs @ 12.29 hrs, Volume= 0.094 af PROPOSED 5 - - Type 11 24-hr 2 year Rainfall= 2.70" Prepared by {enter your company name here} Page 19 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 865.10' Surf.Area= 0.324 ac Storage= 0.246 af Peak Elev= 865.17' @ 12.29 hrs Surf.Area= 0.340 ac Storage= 0.270 af (0.024 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) Invert Avail.Storage Storage Description 1 864.00' 2.245 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 864.00 0.120 0.000 0.000 865.00 0.300 0.210 0.210 865.50 0.420 0.180 0.390 866.00 7.000 1.855 2.245 # Routing Invert Outlet Devices 1 Primary 865.10' 10.0' long x 20.0' breadth Broad - Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max =0.45 cfs @ 12.29 hrs HW= 865.17' (Free Discharge) L1= Broad - Crested Rectangular Weir (Weir Controls 0.45 cfs @ 0.7 fps) PROPOSED 5 - - Type 11 24-hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 20 HydroCAD© 7.00 s/n 000744 © 1986 - 2003 Applied Microcomputer Systems 6/4/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Sim -Route method - Pond routing by Sim -Route method Subcatchment 1S: SUB 1 TO DITCH RunoffArea= 13.380 ac Runoff Depth = 1.53" Flow Length =160' Tc =23.3 min CN =71 Runoff =20.06 cfs 1.709 af Subcatchment 2S: CENTER OF SITE Runoff Area = 22.260 ac Runoff Depth= 1.74" Flow Length =955' Tc =15.0 min CN =74 Runoff =49.91 cfs 3.236 af Subcatchment 3S: NE OFF -SITE Runoff Area =0.530 ac Runoff Depth= 2.29" Flow Length =70' Tc =10.4 min CN =81 Runoff =1.84 cfs 0.101 af Subcatchment 4S: NE OFF -SITE Runoff Area =0.380 ac Runoff Depth= 2.46" Tc =3.0 min CN =83 Runoff =1.83 cfs 0.078 af Subcatchment 5S: SE OFF -OSITE Runoff Area =7.350 ac Runoff Depth = 0.86" Flow Length =300' Tc =44.0 min CN =60 Runoff =3.31 cfs 0.528 af Subcatchment 6S: SW SUB Runoff Area =2.280 ac Runoff Depth= 2.21" Tc =5.0 min CN =80 Runoff =9.30 cfs 0.420 af Subcatchment 7S: SE SUB Runoff Area =9.480 ac Runoff Depth= 1.82" Flow Length =560' Tc =11.0 min CN =75 Runoff =25.58 cfs 1.436 af Subcatchment 8S: SUB 8 OFF -SITE Runoff Area =1.300 ac Runoff Depth= 1.21" Flow Length =60' Tc =6.9 min CN =66 Runoff =2.65 cfs 0.131 af Subcatchment 9S: SUB MIT AREA Runoff Area =1.890 ac Runoff Depth = 1.53" Flow Length =160' Tc =11.9 min CN =71 Runoff =4.11 cfs 0.241 of Subcatchment 10S: SE OFF-SITE Runoff Area =0.880 ac Runoff Depth= 1.60" Tc =5.0 min CN =72 Runoff =2.62 cfs 0.117 of Subcatchment 115: SE OFF -SITE Runoff Area =0.450 ac Runoff Depth= 2.13" Tc =5.0 min CN =79 Runoff =1.77 cfs 0.080 af Pond 2P: NORTH POND Peak EIev= 868.30' Storage =4.120 af Inflow =49.91 cfs 3.236 af Outflow =7.94 cfs 3.217 af Pond 6P: SW POND Peak EIev= 918.69' Storage =1.623 af Inflow =13.87 cfs 1.855 af Outflow =4.13 cfs 1.849 af Pond 7P: SE POND Peak EIev= 928.82' Storage =0.860 af Inflow =25.58 cfs 1.436 af Outflow =8.82 cfs 1.435 af Pond 9P: MITIGATION AREA #1 Peak EIev= 865.28' Storage =0.309 af Inflow =4.11 cfs 0.241 af Outflow =1.98 cfs 0.241 af PROPOSED 5 - - Type 11 24-hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 21 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: SUB 1 TO DITCH Runoff = 20.06 cfs @ 12.17 hrs, Volume= 1.709 af, Depth= 1.53" 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 1.600 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 5.180 61 >75% Grass cover, Good, HSG B 0.450 98 Rooftops 13.380 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.3 160 0.0185 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 2S: CENTER OF SITE Runoff = 49.91 cfs @ 12.08 hrs, Volume= 3.236 af, Depth= 1.74" 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 3.420 98 Rooftops 2.260 98 Roadway 1.300 98 Driveway 0.190 98 Sidewalk 0.680 98 Open water 14.410 61 >75% Grass cover, Good, HSG B 22.260 74 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.5 75 0.0300 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.0 125 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.5 755 5.0 Direct Entry, Pipe flow A 5 fps 15.0 955 Total PROPOSED 5 - - Type 11 24-hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 22 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 3S: NE OFF -SITE Runoff = 1.84 cfs @ 12.02 hrs, Volume= 0.101 af, Depth= 2.29" 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 0.090 98 Rooftop 0.100 98 Roadway 0.080 98 Driveway 0.020 98 Sidewalk 0.240 61 >75% Grass cover, Good, HSG B 0.530 81 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 8.9 70 0.0400 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 0.5 Direct Entry, Gutter flow @ 3 fps 10.4 70 Total Subcatchment 4S: NE OFF -SITE Runoff = 1.83 cfs @ 11.94 hrs, Volume= 0.078 af, Depth= 2.46" 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 0.170 98 Roadway 0.060 98 Sidewalk 0.150 61 >75% Grass cover, Good, HSG B 0.380 83 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.0 Direct Entry, Subcatchment 5S: SE OFF -OSITE Runoff = 3.31 cfs @ 12.47 hrs, Volume= 0.528 af, Depth= 0.86" 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" PROPOSED 5 - - Type 11 24 -hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 23 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems .6/4/2010 Area (ac) CN Description 0.950 55 Woods, Good, HSG B 6.400 61 >75% Grass cover, Good, HSG B 7.350 60 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 44.0 300 0.0133 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 6S: SW SUB Runoff = 9.30 cfs @ 11.96 hrs, Volume= 0.420 af, Depth= 2.21" Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Type 11 24 -hr 10 year Rainfall= 4.20" Area (ac) CN Description 0.460 98 Roadway 0.150 98 Sidewalk 0.340 98 Open water 1.140 61 >75% Grass cover, Good, HSG B 0.190 98 Parking lot 2.280 80 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Gutter flow @ 3 fps Subcatchment 7S: SE SUB Runoff = 25.58 cfs @ 12.03 hrs, Volume= 1.436 af, Depth= 1.82" 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 1.410 98 Rooftop 1.090 98 Roadway 0.520 98 Driveway 0.160 98 Sidewalk 0.360 98 Open water 5.940 61 >75% Grass cover, Good, HSG B 9.480 75 Weighted Average PROPOSED 5 - - Type 11 24-hr 10 year Rainfall= 4.20" Prepared by {enter your company name here} Page 24 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 55 0.0270 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.3 160 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 1.1 345 5.0 Direct Entry, Pipe flow @ 5 fps 11.0 560 Total Subcatchment 8S: SUB 8 OFF -SITE Runoff = 2.65 cfs @ 11.99 hrs, Volume= 0.131 af, Depth= 1.21" 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 1.120 61 >75% Grass cover, Good, HSG B 0.180 98 Rooftop 1.300 66 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ( ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 5.9 60 0.0800 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 6.9 60 Total Subcatchment 9S: SUB MIT AREA Runoff = 4.11 cfs @ 12.04 hrs, Volume= 0.241 af, Depth= 1.53" 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 1.380 61 >75% Grass cover, Good, HSG B 0.090 98 Rooftop 0.420 98 Mitigation Wetland 1.890 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.9 160 0.1250 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 11.9 160 Total PROPOSED 5 - - Type 1124 -hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 25 HydroCAD® 7.00 sin 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 10S: SE OFF -SITE Runoff = 2.62 cfs @ 11.97 hrs, Volume= 0.117 af, Depth= 1.60" 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 0.250 98 IMPERVIOUS 0.630 61 >75% Grass cover, Good, HSG B 0.880 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: SE OFF -SITE Runoff = 1.77 cfs @ 11.96 hrs, Volume= 0.080 af, Depth= 2.13" 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 0.220 98 IMPERVIOUS 0.230 61 >75% Grass cover, Good, HSG B 0.450 79 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Pond 2P: NORTH POND Inflow Area = 22.260 ac, Inflow Depth = 1.74" for 10 year event Inflow = 49.91 cfs @ 12.08 hrs, Volume= 3.236 af Outflow = 7.94 cfs @ 12.57 hrs, Volume= 3.217 af, Atten= 84 %, Lag= 29.8 min Primary = 7.94 cfs @ 12.57 hrs, Volume= 3.217 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 866.50' Surf.Area= 0.690 ac Storage= 2.745 af Peak Elev= 868.30' © 12.57 hrs Surf.Area= 0.814 ac Storage= 4.120 af (1.375 af above start) Plug -Flow detention time= 1,093.6 min calculated for 0.472 af (15% of inflow) Center -of -Mass det. time= 196.9 min ( 1,048.3 - 851.4 ) # Invert Avail.Storage Storage Description 1 858.00' 6.595 af Custom Stage Data (Prismatic) Listed below 4 PROPOSED 5 - - Type 11 24-hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 26 HydroCAD® 7.00 sin 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 858.00 0.140 0.000 0.000 860.00 0.210 0.350 0.350 862.00 0.280 0.490 0.840 864.00 0.370 0.650 1.490 866.00 0.570 0.940 2.430 866.50 0.690 0.315 2.745 868.00 0.790 1.110 3.855 870.00 0.950 1.740 5.595 871.00 1.050 1.000 6.595 # Routing Invert Outlet Devices 1 Primary 866.50' 18.0" x 21.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 866.30' S= 0.0095'/' n= 0.013 Cc= 0.900 2 Device 1 864.00' 15.0" x 30.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 864.30' S= - 0.0100 '1' n= 0.013 Cc= 0.900 Primary OutFlow Max =7.94 cfs @ 12.57 hrs HW= 868.30' (Free Discharge) t-1= Culvert (Passes 7.94 cfs of 8.09 cfs potential flow) t-2= Culvert (Inlet Controls 7.94 cfs @ 6.5 fps) Pond 6P: SW POND Inflow Area = 11.760 ac, Inflow Depth = 1.89" for 10 year event Inflow = 13.87 cfs @ 11.98 hrs, Volume= 1.855 af Outflow = 4.13 cfs @ 13.16 hrs, Volume= 1.849 af, Atten= 70 %, Lag= 71.0 min Primary = 4.13 cfs @ 13.16 hrs, Volume= 1.849 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 917.00' Surf.Area= 0.340 ac Storage= 0.985 af Peak Elev= 918.69' @ 13.16 hrs Surf.Area= 0.398 ac Storage= 1.623 af (0.638 af above start) Plug -Flow detention time= 532.5 min calculated for 0.864 af (47% of inflow) Center -of -Mass det. time= 139.0 min ( 1,027.7 - 888.7 ) # Invert Avail.Storage Storage Description 1 912.00' 2.640 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 912.00 0.130 0.000 0.000 914.00 0.170 0.300 0.300 916.00 0.230 0.400 0.700 917.00 0.340 0.285 0.985 918.00 0.370 0.355 1.340 920.00 0.450 0.820 2.160 921.00 0.510 0.480 2.640 # Routing Invert Outlet Devices 1 Primary 910.00' 12.0" x 74.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 909.50' S= 0.0068 '1' n= 0.013 Cc= 0.900 t - PROPOSED 5 - - Type 1124 -hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 27 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 2 Device 1 914.50' 12.0" x 26.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= - 0.0962 '/' n= 0.013 Cc= 0.900 Primary OutFlow Max =4.13 cfs @ 13.16 hrs HW= 918.69' (Free Discharge) t-1= Culvert (Passes 4.13 cfs of 9.23 cfs potential flow) t-2= Culvert (Inlet Controls 4.13 cfs @ 5.3 fps) Pond 7P: SE POND Inflow Area = 9.480 ac, Inflow Depth = 1.82" for 10 year event Inflow = 25.58 cfs @ 12.03 hrs, Volume= 1.436 af Outflow = 8.82 cfs @ 12.21 hrs, Volume= 1.435 af, Atten= 66 %, Lag= 10.7 min Primary = 8.82 cfs @ 12.21 hrs, Volume= 1.435 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 927.00' Surf.Area= 0.170 ac Storage= 0.411 af Peak Elev= 928.82' @ 12.21 hrs Surf.Area= 0.309 ac Storage= 0.860 af (0.448 af above start) Plug -Flow detention time= 237.3 min calculated for 1.024 af (71 % of inflow) Center -of -Mass det. time= 62.2 min ( 907.1 - 844.9 ) # Invert Avail.Storage Storage Description 1 922.00' 1.594 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 922.00 0.010 0.000 0.000 924.00 0.072 0.082 0.082 926.00 0.115 0.187 0.269 927.00 0.170 0.142 0.411 928.00 0.230 0.200 0.611 929.50 0.373 0.452 1.064 930.00 0.570 0.236 1.299 930.50 0.610 0.295 1.594 # Routing Invert Outlet Devices 1 Primary 917.90' 18.0" x 138.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= 0.0065'/' n= 0.013 Cc= 0.900 2 Device 1 924.50' 18.0" x 33.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 927.00' S= - 0.0758 '/' n= 0.013 Cc= 0.900 Primary OutFlow Max =8.82 cfs @ 12.21 hrs HW= 928.82' TW= 918.02' (Dynamic Tailwater) t-1= Culvert (Passes 8.82 cfs of 22.72 cfs potential flow) t-2= Culvert (Inlet Controls 8.82 cfs @ 5.0 fps) Pond 9P: MITIGATION AREA #1 Inflow Area = 1.890 ac, Inflow Depth = 1.53" for 10 year event Inflow = 4.11 cfs @ 12.04 hrs, Volume= 0.241 af Outflow = 1.98 cfs @ 12.19 hrs, Volume= 0.241 af, Atten= 52 %, Lag= 8.6 min Primary = 1.98 cfs @ 12.19 hrs, Volume= 0.241 af PROPOSED 5 - - Type 11 24-hr 10 year Rainfall = 4.20" Prepared by {enter your company name here} Page 28 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 865.10' Surf.Area= 0.324 ac Storage= 0.246 af Peak Elev= 865.28' @ 12.19 hrs Surf.Area= 0.366 ac Storage= 0.309 af (0.063 af above start) Plug -Flow detention time= (not calculated) Center -of -Mass det. time= (not calculated) # Invert Avail.Storage Storage Description 1 864.00' 2.245 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 864.00 0.120 0.000 0.000 865.00 0.300 0.210 0.210 865.50 0.420 0.180 0.390 866.00 7.000 1.855 2.245 # Routing Invert Outlet Devices 1 Primary 865.10' 10.0' long x 20.0' breadth Broad - Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max =1.98 cfs @ 12.19 hrs HW= 865.28' (Free Discharge) L1= Broad - Crested Rectangular Weir (Weir Controls 1.98 cfs @ 1.1 fps) - • PROPOSED 5 - - Type 11 24-hr 100 year Rainfall = 6.00" Prepared by {enter your company name here} Page 29 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Time span =0.00- 100.00 hrs, dt =0.01 hrs, 10001 points Runoff by SCS TR -20 method, UH =SCS Reach routing by Sim -Route method - Pond routing by Sim -Route method Subcatchment 1S: SUB 1 TO DITCH RunoffArea= 13.380 ac Runoff Depth= 2.90" Flow Length =160' Tc =23.3 min CN =71 Runoff =39.20 cfs 3.232 af Subcatchment 2S: CENTER OF SITE Runoff Area = 22.260 ac Runoff Depth= 3.18" Flow Length =955' Tc =15.0 min CN =74 Runoff =91.90 cfs 5.908 af Subcatchment 3S: NE OFF -SITE Runoff Area =0.530 ac Runoff Depth= 3.88" Flow Length =70' Tc =10.4 min CN =81 Runoff =3.07 cfs 0.172 af Subcatchment 4S: NE OFF -SITE Runoff Area =0.380 ac Runoff Depth= 4.09" Tc =3.0 min CN =83 Runoff =2.96 cfs 0.130 of Subcatchment 5S: SE OFF -OSITE Runoff Area =7.350 ac Runoff Depth= 1.92" Flow Length =300' Tc =44.0 min CN =60 Runoff =8.67 cfs 1.177 of Subcatchment 6S: SW SUB Runoff Area =2.280 ac Runoff Depth= 3.78" Tc =5.0 min CN =80 Runoff =15.60 cfs 0.718 of Subcatchment 7S: SE SUB Runoff Area =9.480 ac Runoff Depth= 3.28" Flow Length =560' Tc =11.0 min CN =75 Runoff =46.16 cfs 2.593 of Subcatchment 8S: SUB 8 OFF -SITE Runoff Area =1.300 ac Runoff Depth= 2.44" Flow Length =60' Tc =6.9 min CN =66 Runoff =5.49 cfs 0.264 af Subcatchment 9S: SUB MIT AREA Runoff Area =1.890 ac Runoff Depth= 2.90" Flow Length =160' Tc =11.9 min CN =71 Runoff =7.89 cfs 0.457 af Subcatchment 10S: SE OFF-SITE Runoff Area =0.880 ac Runoff Depth= 2.99" Tc =5.0 min CN =72 Runoff =4.88 cfs 0.220 af Subcatchment 11S: SE OFF-SITE Runoff Area =0.450 ac Runoff Depth= 3.68" Tc =5.0 min CN =79 Runoff =3.01 cfs 0.138 af Pond 2P: NORTH POND Peak Elev= 869.95' Storage =5.551 af Inflow =91.90 cfs 5.908 af Outflow =10.97 cfs 5.889 af Pond 6P: SW POND Peak EIev= 920.20' Storage =2.254 af Inflow =23.80 cfs 3.310 af Outflow =6.21 cfs 3.305 af Pond 7P: SE POND Peak Elev= 929.98' Storage =1.291 af Inflow =46.16 cfs 2.593 af Outflow =12.71 cfs 2.592 of Pond 9P: MITIGATION AREA #1 Peak Elev= 865.41' Storage =0.358 af Inflow =7.89 cfs 0.457 af Outflow =4.69 cfs 0.457 af PROPOSED 5 - - Type 11 24-hr 100 year Rainfall = 6.00" Prepared by {enter your company name here} Page 30 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 1S: SUB 1 TO DITCH Runoff = 39.20 cfs © 12.17 hrs, Volume= 3.232 af, Depth= 2.90" 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 1.600 61 Pasture /grassland /range, Good, HSG B 5.170 85 Wetland 0.980 55 Woods, Good, HSG B 5.180 61 >75% Grass cover, Good, HSG B 0.450 98 Rooftops 13.380 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 23.3 160 0.0185 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 2S: CENTER OF SITE Runoff = 91.90 cfs @ 12.07 hrs, Volume= 5.908 af, Depth= 3.18" 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 3.420 98 Rooftops 2.260 98 Roadway 1.300 98 Driveway 0.190 98 Sidewalk 0.680 98 Open water 14.410 61 >75% Grass cover, Good, HSG B 22.260 74 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.5 75 0.0300 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.0 125 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 2.5 755 5.0 Direct Entry, Pipe flow @ 5 fps 15.0 955 Total t • PROPOSED 5 - - Type 1124 -hr 100 year Rainfall = 6.00" Prepared by {enter your company name here} Page 31 HydroCAD© 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 3S: NE OFF -SITE Runoff = 3.07 cfs @ 12.02 hrs, Volume= 0.172 af, Depth= 3.88" 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 0.090 98 Rooftop 0.100 98 Roadway 0.080 98 Driveway 0.020 98 Sidewalk 0.240 61 >75% Grass cover, Good, HSG B 0.530 81 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 8.9 70 0.0400 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 0.5 Direct Entry, Gutter flow (a7 3 fps 10.4 70 Total Subcatchment 4S: NE OFF -SITE Runoff = 2.96 cfs @ 11.94 hrs, Volume= 0.130 af, Depth= 4.09" 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 0.170 98 Roadway 0.060 98 Sidewalk 0.150 61 >75% Grass cover, Good, HSG B 0.380 83 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.0 Direct Entry, Subcatchment 5S: SE OFF -OSITE Runoff = 8.67 cfs @ 12.46 hrs, Volume= 1.177 af, Depth= 1.92" 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" • PROPOSED 5 - - Type 1124 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 32 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Area (ac) CN Description 0.950 55 Woods, Good, HSG B 6.400 61 >75% Grass cover, Good, HSG B 7.350 60 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 44.0 300 0.0133 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" Subcatchment 6S: SW SUB Runoff = 15.60 cfs @ 11.96 hrs, Volume= 0.718 af, Depth= 3.78" 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 0.460 98 Roadway 0.150 98 Sidewalk 0.340 98 Open water 1.140 61 >75% Grass cover, Good, HSG B 0.190 98 Parking lot 2.280 80 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Gutter flow @ 3 fps Subcatchment 7S: SE SUB Runoff = 46.16 cfs @ 12.03 hrs, Volume= 2.593 af, Depth= 3.28" 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 1.410 98 Rooftop 1.090 98 Roadway 0.520 98 Driveway 0.160 98 Sidewalk 0.360 98 Open water 5.940 61 >75% Grass cover, Good, HSG B 9.480 75 Weighted Average • PROPOSED 5 - - Type 11 24-hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 33 HydroCADO 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) ( ft/sec) (cfs) 8.5 55 0.0270 0.1 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 1.3 160 0.0200 2.1 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps 1.1 345 5.0 Direct Entry, Pipe flow A 5 fps 11.0 560 Total Subcatchment 8S: SUB 8 OFF -SITE Runoff = 5.49 cfs @ 11.99 hrs, Volume= 0.264 af, Depth= 2.44" 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 1.120 61 >75% Grass cover, Good, HSG B 0.180 98 Rooftop 1.300 66 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 5.9 60 0.0800 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 6.9 60 Total Subcatchment 9S: SUB MIT AREA Runoff = 7.89 cfs @ 12.04 hrs, Volume= 0.457 af, Depth= 2.90" 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 1.380 61 >75% Grass cover, Good, HSG B 0.090 98 Rooftop 0.420 98 Mitigation Wetland 1.890 71 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.0 Direct Entry, Roof to yard 10.9 160 0.1250 0.2 Sheet Flow, Grass: Dense n= 0.240 P2= 2.70" 11.9 160 Total t • PROPOSED 5 - - Type 1124 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 34 HydroCAD® 7.00 s/n 000744 © 1986-2003 Applied Microcomputer Systems 6/4/2010 Subcatchment 10S: SE OFF -SITE Runoff = 4.88 cfs @ 11.96 hrs, Volume= 0.220 af, Depth= 2.99" 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 0.250 98 IMPERVIOUS 0.630 61 >75% Grass cover, Good, HSG B 0.880 72 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: SE OFF -SITE Runoff = 3.01 cfs @ 11.96 hrs, Volume= 0.138 af, Depth= 3.68" 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 0.220 98 IMPERVIOUS 0.230 61 >75% Grass cover, Good, HSG B 0.450 79 Weighted Average Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Pond 2P: NORTH POND Inflow Area = 22.260 ac, Inflow Depth = 3.18" for 100 year event Inflow = 91.90 cfs @ 12.07 hrs, Volume= 5.908 af Outflow = 10.97 cfs @ 12.67 hrs, Volume= 5.889 af, Atten= 88 %, Lag= 35.9 min Primary = 10.97 cfs @ 12.67 hrs, Volume= 5.889 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 866.50' Surf.Area= 0.690 ac Storage= 2.745 af Peak Elev= 869.95' @ 12.67 hrs Surf.Area= 0.946 ac Storage= 5.551 af (2.806 af above start) Plug -Flow detention time= 483.5 min calculated for 3.143 af (53% of inflow) Center -of -Mass det. time= 183.3 min ( 1,017.3 - 834.0 ) # Invert Avail.Storage Storage Description 1 858.00' 6.595 af Custom Stage Data (Prismatic) Listed below • PROPOSED 5 - - Type 11 24-hr 100 year Rainfall = 6.00" Prepared by {enter your company name here} Page 35 HydroCADO 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 858.00 0.140 0.000 0.000 860.00 0.210 0.350 0.350 862.00 0.280 0.490 0.840 864.00 0.370 0.650 1.490 866.00 0.570 0.940 2.430 866.50 0.690 0.315 2.745 868.00 0.790 1.110 3.855 870.00 0.950 1.740 5.595 871.00 1.050 1.000 6.595 # Routing Invert Outlet Devices 1 Primary 866.50' 18.0" x 21.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 866.30' S= 0.0095'1' n= 0.013 Cc= 0.900 2 Device 1 864.00' 15.0" x 30.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 864.30' S= - 0.0100 '1' n= 0.013 Cc= 0.900 Primary OutFlow Max =10.97 cfs @ 12.67 hrs HW= 869.95' (Free Discharge) L1= Culvert (Passes 10.97 cfs of 13.98 cfs potential flow) L2= Culvert (Inlet Controls 10.97 cfs @ 8.9 fps) Pond 6P: SW POND Inflow Area = 11.760 ac, Inflow Depth = 3.38" for 100 year event Inflow = 23.80 cfs @ 11.97 hrs, Volume= 3.310 af Outflow = 6.21 cfs @ 13.59 hrs, Volume= 3.305 af, Atten= 74 %, Lag= 97.0 min Primary = 6.21 cfs @ 13.59 hrs, Volume= 3.305 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 917.00' Surf.Area= 0.340 ac Storage= 0.985 af Peak Elev= 920.20' @ 13.59 hrs Surf.Area= 0.462 ac Storage= 2.254 af (1.269 af above start) Plug -Flow detention time= 349.2 min calculated for 2.320 af (70% of inflow) Center -of -Mass det. time= 139.2 min ( 1,006.2 - 867.0 ) # Invert Avail.Storage Storage Description 1 912.00' 2.640 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 912.00 0.130 0.000 0.000 914.00 0.170 0.300 0.300 916.00 0.230 0.400 0.700 917.00 0.340 0.285 0.985 918.00 0.370 0.355 1.340 920.00 0.450 0.820 2.160 921.00 0.510 0.480 2.640 # Routing Invert Outlet Devices 1 Primary 910.00' 12.0" x 74.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 909.50' S= 0.0068'1' n= 0.013 Cc= 0.900 PROPOSED 5 - - Type 11 24 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 36 HydroCAD® 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 2 Device 1 914.50' 12.0" x 26.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= - 0.0962'1' n= 0.013 Cc= 0.900 Primary OutFlow Max =6.21 cfs @ 13.59 hrs HW= 920.20' (Free Discharge) t-1= Culvert (Passes 6.21 cfs of 10.04 cfs potential flow) L2= Culvert (Inlet Controls 6.21 cfs @ 7.9 fps) Pond 7P: SE POND Inflow Area = 9.480 ac, Inflow Depth = 3.28" for 100 year event Inflow = 46.16 cfs @ 12.03 hrs, Volume= 2.593 of Outflow = 12.71 cfs @ 12.24 hrs, Volume= 2.592 af, Atten= 72 %, Lag= 12.8 min Primary = 12.71 cfs @ 12.24 hrs, Volume= 2.592 af Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 927.00' Surf.Area= 0.170 ac Storage= 0.411 af Peak Elev= 929.98' @ 12.24 hrs Surf.Area= 0.563 ac Storage= 1.291 af (0.879 af above start) Plug -Flow detention time= 159.0 min calculated for 2.180 af (84% of inflow) Center -of -Mass det. time= 54.9 min ( 882.8 - 827.9 ) # Invert Avail.Storage Storage Description 1 922.00' 1.594 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 922.00 0.010 0.000 0.000 924.00 0.072 0.082 0.082 926.00 0.115 0.187 0.269 927.00 0.170 0.142 0.411 928.00 0.230 0.200 0.611 929.50 0.373 0.452 1.064 930.00 0.570 0.236 1.299 930.50 0.610 0.295 1.594 # Routing Invert Outlet Devices 1 Primary 917.90' 18.0" x 138.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 917.00' S= 0.0065'1' n= 0.013 Cc= 0.900 2 Device 1 924.50' 18.0" x 33.0' long Culvert RCP, sq.cut end projecting, Ke= 0.500 Outlet Invert= 927.00' S= - 0.0758 '/' n= 0.013 Cc= 0.900 Primary OutFlow Max =12.71 cfs @ 12.24 hrs HW= 929.98' TW= 918.86' (Dynamic Tailwater) t-1= Culvert (Passes 12.71 cfs of 23.58 cfs potential flow) t-2= Culvert (Inlet Controls 12.71 cfs @ 7.2 fps) Pond 9P: MITIGATION AREA #1 Inflow Area = 1.890 ac, Inflow Depth = 2.90" for 100 year event Inflow = 7.89 cfs @ 12.04 hrs, Volume= 0.457 af Outflow = 4.69 cfs @ 12.16 hrs, Volume= 0.457 af, Atten= 41 %, Lag= 6.9 min Primary = 4.69 cfs @ 12.16 hrs, Volume= 0.457 af - f PROPOSED 5 - - Type 1124 -hr 100 year Rainfall= 6.00" Prepared by {enter your company name here} Page 37 HydroCAD© 7.00 s/n 000744 © 1986 -2003 Applied Microcomputer Systems 6/4/2010 Routing by Sim -Route method, Time Span= 0.00- 100.00 hrs, dt= 0.01 hrs Starting Elev= 865.10' Surf.Area= 0.324 ac Storage= 0.246 af Peak Elev= 865.41' @ 12.16 hrs Surf.Area= 0.399 ac Storage= 0.358 af (0.112 af above start) Plug -Flow detention time= 319.5 min calculated for 0.211 af (46% of inflow) Center -of -Mass det. time= 35.6 min ( 873.7 - 838.1 ) # Invert Avail.Storage Storage Description 1 864.00' 2.245 af Custom Stage Data (Prismatic) Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre -feet) (acre -feet) 864.00 0.120 0.000 0.000 865.00 0.300 0.210 0.210 865.50 0.420 0.180 0.390 866.00 7.000 1.855 2.245 # Routing Invert Outlet Devices 1 Primary 865.10' 10.0' long x 20.0' breadth Broad - Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max =4.69 cfs @ 12.16 hrs HW= 865.41' (Free Discharge) t-1= Broad - Crested Rectangular Weir (Weir Controls 4.69 cfs @ 1.5 fps)