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C:�Program Files\HydroCAD�ProjectsWydroCAD Projects\08 JOBS\ <br /> 08175B Barry Sewall Proposed Conditions May 13, 2009 ( Type 1!24-hr 2 Year Rainf�l1=2.75" <br /> Prepared by Gronberg 8 Associates, Inc. Printed 5/20/2009 9:31:36 AM <br /> HydroCAD�9.00 s/n 04529 �2009 HydroCAD Software Solutions LLC Paae 6 <br /> Summary for Subcatchment A4: Area 4 <br /> Runoff = 0.45 cfs� 12.04 hrs, Volume= 0.026 af, Depth> 0.40" <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 /> 0.131 98 Paved parking 8�roofs <br /> 0.600 61 >75% Grass cover, Good, HSG B <br /> 0.040 55 Woods, Good, HSG B <br /> 0.771 67 Weighted Average <br /> 0.640 83.01% Pervious Area <br /> 0.131 16.99% Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 10.0 Direct Errtry, <br />