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, <br /> C:1Program Files�FiydroCAD\Projects�hlydroCAD Proje�ts\08 JOBS\ <br /> 08175B Barry Sewall Proposed Conditions May 13, 2008 Type I!24-hr 100 Year Rainfa11=6.00" <br /> Prepared by Gronberg 8�Associates, tnc. Printed 5/20/2009 9:09:37 AM <br /> HydroCAD�9.00 s/n 04529 �2009 HydroCAD Software Solutions LLC Pa�e 21 <br /> Summary for Subcatchment A2: Area 2 <br /> Runoff = 1.20 afs @ 12.00 hrs, Volume= 0.059 af, Depth> 2.94" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Type II 24-hr 100 Year Rainfa11=6.00" <br /> Area (ac) CN Description <br /> 0.100 98 Paved parking&roofs <br /> 0.060 61 >75% Grass cover, Good, HSG B <br /> 0.080 55 Woods, Good, HSG B <br /> 0.240 74 Weighted Average <br /> 0.140 58.33% Pervious Area <br /> 0.100 41.67% Impervious Area <br /> Tc Length Slope Velociiy Capacity Description <br /> (min) (feefl (fUft) (ft/sec) (cfs) <br /> 9.0 Direct Er�try, <br />