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C:�Program Files\HydroCAD�ProjectsUiydroCAD Proje�ts\08 JOBS\ <br /> 08175B Barry Sewall Existing Condltions May 13, 2009 Type 1124-hr 10 Year Rainfa11=4.20" <br /> Prepared by Gronberg &Associates, Inc. Printed 5/19/2009 4:17:13 PM <br /> HydroCAD�9 00 s/n 04529 �2�9 HydroCAD SoRware Solutions LLC Paite 14 <br /> Summary for Subcatchment A3: Area 3 <br /> Runoff = 1.67 cfs� 12.06 hrs, Volume= 0.096 af, Depth> 0.86" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Type 1124hr 10 Year Rainfa11=4.20" <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) (ff/ft) (ft/sec) (cfs) <br /> 12.0 Direct Entry, <br />