Stormwater Report.pdf - Laserfiche WebLink

Home Browse Search

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 20 Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=940.00' (Free Discharge) L1=Culvert ( Controls 0.00 cfs) Tertiary OutFlow Max=0.64 cfs @ 12.22 hrs HW=940.70' (Free Discharge) AL2=Exfiltration (Exfiltration Controls 0.01 cfs) 3=Culvert (Inlet Controls 0.64 cfs @ 3.24 fps) Summary for Pond 10P: existing Inflow Area = 105,565 sf, 61.71% Impervious, Inflow Depth = 1.78" for 2-yr event Inflow = 6.75 cfs @ 12.04 hrs, Volume= 15,640 cf Outflow = 6.75 cfs @ 12.04 hrs, Volume= 15,640 cf, Atten= 0%, Lag= 0.0 min Primary = 6.75 cfs @ 12.04 hrs, Volume= 15,640 cf Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 937.73' @ 12.04 hrs Device Routing Invert Outlet Devices #1 Primary 936.30' 24.0" Round Culvert L= 65.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/Outlet Invert= 936.30' /936.11' S= 0.0029 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 3.14 sf Primary OutFlow Max=6.59 cfs @ 12.04 hrs HW=937.71' (Free Discharge) L1=Culvert (Barrel Controls 6.59 cfs @ 3.92 fps) Summary for Pond 11 P: Inflow Area = 16,274 sf, 88.82% Impervious, Inflow Depth = 2.33" for 2-yr event Inflow = 1.33 cfs @ 12.04 hrs, Volume= 3,165 cf Outflow = 1.33 cfs @ 12.04 hrs, Volume= 3,165 cf, Atten= 0%, Lag= 0.0 min Primary = 1.33 cfs @ 12.04 hrs, Volume= 3,165 cf Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 942.96' @ 12.04 hrs Device Routing Invert Outlet Devices #1 Primary 942.35' 12.0" Round Culvert L= 8.0' RCP, sq.cut end projecting, Ke= 0.500 Inlet/ Outlet Invert= 942.35' /942.00' S= 0.0438 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=1.29 cfs @ 12.04 hrs HW=942.95' (Free Discharge) L1=Culvert (Inlet Controls 1.29 cfs @ 2.63 fps)