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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 />[82] Warning: Early inflow requires earlier time span <br />[57] Hint: Peaked at 869.73' (Flood elevation advised) <br />[80] Warning: Exceeded Pond 5P by 0.15' @ 5.26 hrs (1.23 cfs 0.022 af) <br />[80] Warning: Exceeded Pond 7P by 0.72' @ 12.26 hrs (3.21 cfs 0.065 af) <br />[80] Warning: Exceeded Pond 8P by 0.45' @ 12.26 hrs (1.13 cfs 0.036 af) <br />Inflow Area = 0.439 ac,100.00% Impervious, Inflow Depth > 5.16" for 100 -yr event <br />Inflow = 2.84 cfs @ 12.26 hrs, Volume= 0.189 af <br />Outflow = 2.84 cfs @ 12.26 hrs, Volume= 0.189 af, Atten= 0 %, Lag= 0.0 min <br />Primary = 2.84 cfs @ 12.26 hrs, Volume= 0.189 af <br />Routing by Dyn -Stor -Ind method, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Peak Elev= 869.73' @ 11.97 hrs <br />Device Routing Invert Outlet Devices <br />0 <br />0 <br />LL <br />#1 Primary 865.31' 12.0" Round Culvert <br />L= 37.0' RCP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 865.31' / 865.01' S= 0.0081 '/' Cc= 0.900 <br />n= 0.013 Concrete pipe, straight & clean <br />Primary OutFlow Max =2.65 cfs @ 12.26 hrs HW= 869.25' TW= 868.76' (Dynamic Tailwater) <br />L1= Culvert (Inlet Controls 2.65 cfs @ 3.38 fps) <br />1 <br />1 <br />Summary for Pond 4P: MH 404 <br />Pond 4P: MH 404 <br />Hydrograph <br />t <br />.a is 1 1 i 1 1 1 <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 22 <br />Inflow (Area -0.439 ac <br />Peak Elev= 869.73' <br />12.0" <br />Round Culvert <br />1 <br />0 <br />• <br />10 11 12 13 14 <br />Time (hours) <br />15 <br />n =0.013 <br />L= 37.0' <br />S= 0.0081 /' <br />6 <br />17 <br />18 <br />19 <br />20 <br />❑ Inflow <br />❑ Primary <br />