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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 19
<br /> Inlet/ Outlet Invert= 948.15' /942.00' S= 0.0809 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf
<br /> Primary OutFlow Max=0.15 cfs @ 12.04 hrs HW=948.34' (Free Discharge)
<br /> 4-1=Culvert (Inlet Controls 0.15 cfs @ 1.48 fps)
<br /> Summary for Pond 8P: east pond
<br /> Inflow Area = 24,455 sf, 65.66% Impervious, Inflow Depth = 1.93" for 2-yr event
<br /> Inflow = 1.64 cfs @ 12.04 hrs, Volume= 3,935 cf
<br /> Outflow = 0.64 cfs @ 12.22 hrs, Volume= 3,935 cf, Atten= 61%, Lag= 10.5 min
<br /> Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf
<br /> Tertiary = 0.64 cfs @ 12.22 hrs, Volume= 3,935 cf
<br /> Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs
<br /> Peak Elev= 940.70' @ 12.22 hrs Surf.Area= 1,672 sf Storage= 1,033 cf
<br /> Plug-Flow detention time= 36.5 min calculated for 3,935 cf (100% of inflow)
<br /> Center-of-Mass det. time= 35.9 min ( 825.1 - 789.2 )
<br /> Volume Invert Avail.Storage Storage Description
<br /> #1 940.00' 41,696 cf Custom Stage Data (Prismatic) Listed below (Recalc)
<br /> Elevation Surf.Area Inc.Store Cum.Store
<br /> _ (feet) _ (sq-ft) (cubic-feet) (cubic-feet)
<br /> 940.00 1,260 0 0
<br /> 941.00 1,844 1,552 1,552
<br /> 942.00 2,486 2,165 3,717
<br /> 943.00 3,028 2,757 6,474
<br /> 944.00 3,127 3,078 9,552
<br /> 945.00 3,225 3,176 12,728
<br /> 946.00 3,324 3,275 16,002
<br /> 947.00 3,423 3,374 19,376
<br /> 948.00 3,522 3,473 22,848
<br /> 949.00 3,621 3,572 26,420
<br /> 950.00 3,719 3,670 30,090
<br /> 951.00 3,818 3,769 33,858
<br /> 952.00 3,917 3,868 37,726
<br /> 953.00 4,024 3,971 41,696
<br /> Device Routing Invert Outlet Devices
<br /> #1 Primary 942.00' 12.0" Round Culvert
<br /> L= 36.0' RCP, sq.cut end projecting, Ke= 0.500
<br /> Inlet/Outlet Invert= 942.00' /940.94' S= 0.0294 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf
<br /> #2 Tertiary 940.00' 0.200 in/hr Exfiltration over Surface area
<br /> #3 Tertiary 940.00' 6.0" Round Culvert
<br /> L= 104.0' RCP, sq.cut end projecting, Ke= 0.500
<br /> Inlet/Outlet Invert= 940.00' /937.76' S= 0.0215 '/' Cc= 0.900
<br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.20 sf
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