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T:\074211406\June11 CityApp\Surface Water\ <br />ER Landfill 06_2011 Type 1124-hr 25 yr Rainfall=4.70" <br />Prepared by Wenck Associates, Inc. Printed 8/2/2011 <br />HydroCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 9 <br />Summary for Subcatchment 3: 3 <br />Runoff = 12.08 cfs @ 11.98 hrs, Volume= 0.590 af, Depth= 2.63" <br />Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs <br />Type II 24-hr 25 yr Rainfall=4.70" <br />Area (sfl CN Description <br />117,164 80 side of Landfill <br />117,164 100.00% Pervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (fUft) (ft/sec) (cfs) <br />7.0 750 1.79 Direct Entry, <br />Subcatchment 3: 3 <br />Hydrograph <br />..:.12.08 cfs ~ ~ ', ~ ~ ~~ '~ ®RunofF <br />,_ _ -r--_ _ ------r----- -- -_ <br />12 'Type; II 24-hr 25 ~r <br />', , - _ ~. _ <br />._ ~ainfal~=4:70" <br />10 ~ ~~, 'Runoff Area117,164sf <br />_ __ -~ _-- ~ -- ~ - --- --- - -1um-- - -~- <br />;~ 8 ~ Run-off Vo a D.5J0 of <br />_ ~ Runoff Depth=~.6~" <br />0 6 -' ~, Flow Length 750 <br />'_ _ <br />4 <br />CN=80 <br />~~ <br />0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 <br />Time (hours) <br />