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C:\Program Fites\HydroCAD\Projects�-IydroCAD Proje�ts\OS JOBS\ <br /> 081756 Barry Sewall Existing Conditions May 13, 2009 Type I!24-hr 10 Year Rainfall=4.20" <br /> Prepared by Gronberg &Associates, inc. Printed 5/19/2009 4:17:13 PM <br /> HydroCAD�9 00 s/n 04529 �2009 HydroCAD Software Solutions LLC Pa�te 12 <br /> Summary for Subcatchment A1: Area 1 <br /> Runoff = 1.12 cfs (c� 12.04 hrs, Volume= 0.063 af, Depth> 0.71" <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 10 Year Rainfa11=4.20" <br /> Area (ac) CN Description <br /> 0.100 98 Paved parking 8�roofs <br /> 0.030 61 >75% Grass cover, Good, HSG B <br /> 0.930 55 Woods Good HSG B <br /> 1.060 59 Weighted Average <br /> 0.960 90.57% Pervious Area <br /> 0.100 9.43% Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 10.0 Direct EMry, <br />