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UWA10002 - Alley Ponding <br />Prepared by {enter your company name here} <br />HydroCAD® 9.10 s/n 01542 © 2009 HydroCAD Software Solutions LLC <br />Device Routing Invert Outlet Devices <br />Summary for Pond 2P: CB 402 <br />[90] Warning: Qout >Qin may require Finer Routing or smaller dt <br />[87] Warning: Oscillations may require Finer Routing or smaller dt <br />Inflow Area = 0.880 ac,100.00% Impervious, Inflow Depth > 5.15" for 100 -yr event <br />Inflow = 5.08 cfs @ 11.98 hrs, Volume= 0.378 af <br />Outflow = 8.74 cfs @ 12.03 hrs, Volume= 0.376 af, Atten= 0 %, Lag= 3.0 min <br />Primary = 8.74 cfs @ 12.03 hrs, Volume= 0.376 af <br />Routing by Dyn -Stor -Ind method, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Peak Elev= 868.91' @ 12.02 hrs Surf.Area= 598 sf Storage= 170 cf <br />Plug -Flow detention time= 2.8 min calculated for 0.376 af (100% of inflow) <br />Center -of -Mass det. time= 1.4 min ( 733.6 - 732.2 ) <br />Volume Invert Avail.Storage Storage Description <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 18 <br />#1 864.50' 233 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 />864.50 13 0 0 <br />868.33 13 50 50 <br />868.64 133 23 72 <br />869.00 760 161 233 <br />#1 Primary 864.50' 15.0" Round Culvert <br />L= 24.0' RCP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 864.50' / 864.31' S= 0.0079'/' Cc= 0.900 <br />n= 0.013 Concrete pipe, straight & clean <br />#2 Device 1 868.33' 24.0" Horiz. Orifice /Grate C= 0.600 <br />Limited to weir flow at low heads <br />Primary OutFlow Max =0.00 cfs @ 12.03 hrs HW= 868.90' TW= 873.94' (Dynamic Tailwater) <br />L1= Culvert ( Controls 0.00 cfs) <br />L2= Orifice /Grate ( Controls 0.00 cfs) <br />