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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 27
<br /> Inlet/ Outlet Invert= 949.98' /949.70' S= 0.0051 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf
<br /> Primary OutFlow Max=0.21 cfs @ 12.05 hrs HW=950.25' (Free Discharge)
<br /> 4-1=Culvert (Barrel Controls 0.21 cfs @ 1.92 fps)
<br /> Summary for Pond 27P:
<br /> Inflow Area = 7,586 sf, 3.56% Impervious, Inflow Depth = 0.86" for 2-yr event
<br /> Inflow = 0.22 cfs @ 12.05 hrs, Volume= 542 cf
<br /> Outflow = 0.22 cfs @ 12.05 hrs, Volume= 542 cf, Atten= 0%, Lag= 0.0 min
<br /> Primary = 0.22 cfs @ 12.05 hrs, Volume= 542 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 949.93' @ 12.05 hrs
<br /> Device Routing Invert Outlet Devices
<br /> #1 Primary 949.70' 12.0" Round Culvert
<br /> L= 51.0' RCP, sq.cut end projecting, Ke= 0.500
<br /> Inlet/Outlet Invert= 949.70' /948.40' S= 0.0255 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf
<br /> Primary OutFlow Max=0.21 cfs @ 12.05 hrs HW=949.93' (Free Discharge)
<br /> t 1=Culvert (Inlet Controls 0.21 cfs @ 1.62 fps)
<br /> Summary for Pond EX1:
<br /> Inflow Area = 137,785 sf, 50.09% Impervious, Inflow Depth = 1.53" for 2-yr event
<br /> Inflow = 7.68 cfs @ 12.05 hrs, Volume= 17,525 cf
<br /> Outflow = 2.83 cfs @ 12.25 hrs, Volume= 17,496 cf, Atten= 63%, Lag= 12.4 min
<br /> Primary = 2.83 cfs @ 12.25 hrs, Volume= 17,496 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 936.86' @ 12.25 hrs Surf.Area= 7,512 sf Storage= 5,675 cf
<br /> Plug-Flow detention time= 83.4 min calculated for 17,496 cf(100% of inflow)
<br /> Center-of-Mass det. time= 82.4 min ( 904.7 - 822.3 )
<br /> Volume Invert Avail.Storage Storage Description
<br /> #1 936.00' 47,076 cf Custom Stage Data (Prismatic) Listed below
<br /> Elevation Surf.Area Inc.Store Cum.Store
<br /> (feet) (sq-ft) (cubic-feet) (cubic-feet)
<br /> 936.00 5,371 0 0
<br /> 937.00 7,869 6,620 6,620
<br /> 938.00 9,684 8,777 15,397
<br /> 939.00 11,087 10,386 25,782
<br /> 940.00 15,000 13,044 38,826
<br /> 940.50 18,000 8,250 47,076
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