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Benedicting Innsbruck Hydro MN-New Brighton 24-hr S1 2-yr Rainfall=2.84" Prepared by Sunde Engineering Printed 2/13/2020 HydroCAD® 10.00-20 s/n 02350 ©2017 HydroCAD Software Solutions LLC Page 25 Peak Elev= 942.29' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 941.97' 12.0" Round Culvert L= 64.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 941.97' /941.07' S= 0.0141 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=0.42 cfs @ 12.05 hrs HW=942.29' (Free Discharge) 4-1=Culvert (Inlet Controls 0.42 cfs @ 1.93 fps) Summary for Pond 22P: Inflow Area = 14,935 sf, 40.01% Impervious, Inflow Depth = 1.52" for 2-yr event Inflow = 0.75 cfs @ 12.04 hrs, Volume= 1,896 cf Outflow = 0.75 cfs @ 12.04 hrs, Volume= 1,896 cf, Atten= 0%, Lag= 0.0 min Primary = 0.75 cfs @ 12.04 hrs, Volume= 1,896 cf Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 941.51' @ 12.04 hrs Device Routing Invert Outlet Devices #1 Primary 941.07' 12.0" Round Culvert L= 58.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/Outlet Invert= 941.07' /940.26' S= 0.0140 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=0.74 cfs @ 12.04 hrs HW=941.50' (Free Discharge) L1=Culvert (Inlet Controls 0.74 cfs @ 2.24 fps) Summary for Pond 23P: Inflow Area = 22,637 sf, 36.30% Impervious, Inflow Depth = 1.41" for 2-yr event Inflow = 1.08 cfs @ 12.05 hrs, Volume= 2,661 cf Outflow = 1.08 cfs @ 12.05 hrs, Volume= 2,661 cf, Atten= 0%, Lag= 0.0 min Primary = 1.08 cfs @ 12.05 hrs, Volume= 2,661 cf Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 940.80' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 940.26' 12.0" Round Culvert L= 52.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 940.26' /939.53' S= 0.0140 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=1.06 cfs @ 12.05 hrs HW=940.79' (Free Discharge) 4-1=Culvert (Inlet Controls 1.06 cfs @ 2.49 fps)