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1 <br /> C:1Program Files\HydroCAD\ProjectsWydroCAD ProjectsW8 JOBS\ <br /> 081756 Barry Sewall Existing Conditions May 13, 2009 Type ll 24-hr 10 Year Rainfa11=4.20" <br /> Prepared by Gronberg 8 Associates, Inc. Printed 5H9/2009 4:17:13 PM <br /> HydroCAD�9 00 s/n 04529 �2009 HydroCAD Software Solutions LLC Pa�1e 13 <br /> Summary for Subcatchment A2: Area 2 <br /> Runoff = 0.73 cfs @ 12.05 hrs, Volume= 0.044 af, Depth> 0.57" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span=5.00-20.00 hrs, dt=0.05 hrs <br /> Type 1124-hr 10 Year Rainfa11=4.20" <br /> Area (ac) CN Description <br /> 0.020 98 Paved parking & roofs <br /> 0.060 61 >75%Grass cover, Good, HSG B <br /> 0.840 55 Woods, Good, HSG B <br /> 0.920 56 Weighted Average <br /> 0.900 97.83% Pervious Area <br /> 0.020 2.17% Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 10.0 Direct Ernry, <br />