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Benedicting Innsbruck Hydro MN-New Brighton 24-hr S1 2-yr Rainfall=2.84"
<br /> Prepared by Sunde Engineering Printed 2/13/2020
<br /> HydroCAD® 10.00-20 s/n 02350 ©2017 HydroCAD Software Solutions LLC Page 21
<br /> Summary for Pond 12P:
<br /> Inflow Area = 2,071 sf,100.00% Impervious, Inflow Depth = 2.61" for 2-yr event
<br /> Inflow = 0.18 cfs @ 12.04 hrs, Volume= 450 cf
<br /> Outflow = 0.18 cfs @ 12.04 hrs, Volume= 450 cf, Atten= 0%, Lag= 0.0 min
<br /> Primary = 0.18 cfs @ 12.04 hrs, Volume= 450 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 943.17' @ 12.04 hrs
<br /> Device Routing Invert Outlet Devices
<br /> #1 Primary 942.93' 12.0" Round Culvert
<br /> L= 116.0' RCP, sq.cut end projecting, Ke= 0.500
<br /> Inlet/Outlet Invert= 942.93' /942.35' S= 0.0050 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf
<br /> Primary OutFlow Max=0.17 cfs @ 12.04 hrs HW=943.17' (Free Discharge)
<br /> t 1=Culvert (Barrel Controls 0.17 cfs @ 1.82 fps)
<br /> Summary for Pond 13P:
<br /> Inflow Area = 2,071 sf,100.00% Impervious, Inflow Depth = 2.61" for 2-yr event
<br /> Inflow = 0.18 cfs @ 12.04 hrs, Volume= 450 cf
<br /> Outflow = 0.18 cfs @ 12.04 hrs, Volume= 450 cf, Atten= 0%, Lag= 0.0 min
<br /> Primary = 0.18 cfs @ 12.04 hrs, Volume= 450 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 943.36' @ 12.04 hrs
<br /> Device Routing Invert Outlet Devices
<br /> #1 Primary 943.10' 10.0" Round Culvert
<br /> L= 35.0' RCP, sq.cut end projecting, Ke= 0.500
<br /> Inlet/ Outlet Invert= 943.10' /942.93' S= 0.0049 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.55 sf
<br /> Primary OutFlow Max=0.17 cfs @ 12.04 hrs HW=943.36' (Free Discharge)
<br /> 4-1=Culvert (Barrel Controls 0.17 cfs @ 1.81 fps)
<br /> Summary for Pond 14P: north pond
<br /> Inflow Area = 239,067 sf, 65.19% Impervious, Inflow Depth = 1.89" for 2-yr event
<br /> Inflow = 14.63 cfs @ 12.04 hrs, Volume= 37,590 cf
<br /> Outflow = 0.99 cfs @ 13.07 hrs, Volume= 37,590 cf, Atten= 93%, Lag= 61.5 min
<br /> Primary = 0.93 cfs @ 13.07 hrs, Volume= 33,288 cf
<br /> Tertiary = 0.05 cfs @ 13.07 hrs, Volume= 4,302 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 934.99' @ 13.07 hrs Surf.Area= 11,583 sf Storage= 20,440 cf
<br /> Plug-Flow detention time= 240.1 min calculated for 37,590 cf (100% of inflow)
<br /> Center-of-Mass det. time= 239.9 min ( 1,035.5 - 795.5 )
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