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, <br /> C:\Program Fiies\HydroCAD�ProjectsU-IydroCAD Proje�ts\08 JOBS1 <br /> 081756 Barry Sewall Existing Conditions May 13, 2�9 Type 1124-hr 2 Year Rainfal1=2.75" <br /> Prepared by Gronberg 8 Associates, Inc. Printed 5/19i2009 4:17:13 PM <br /> HydroCAD�9.00 s/n 04529 �2009 HydroCAD Software Solutions LLC Pa�le 7 <br /> Summary for Subcatchment A3: Area 3 <br /> Runoff = 0.34 cfs(d1 12.09 hrs, Volume= 0.029 af, Depth> 0.26" <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 2 Year Rainfall=2.75" <br /> Area (ac) CN Description <br /> 0.040 98 Paved parking 8 roofs <br /> 0.050 98 Paved parking&roofs <br /> 0.110 98 Paved parking&roofs <br /> 0.220 61 >75% Grass cover, Good, HSG B <br /> 0.920 55 Woods, Good, HSG B <br /> 1.340 62 Weighted Average <br /> 1.140 85.07% Pervious Area <br /> 0.200 14.93% Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 12.0 Direct Er�try, <br />