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> <br /> C:\Program Files\HydroCAD�Projects�FiydroCAD Projeats\08 JOBS\ <br /> 089756 Barry Sewall Proposed Conditions May 13, 2009 ( Type ll 24-hr 2 Year Rainfa/1=2.75" <br /> Prepared by Gronberg &Associates, (nc. Printed 5/20/2009 9:09:37 AM <br /> HydroCAD�9.00 s/n 04529 �2�9 HydroCAD Software Solutions LLC P8�1e 7 <br /> Summary for Subcatchment A2: Area 2 <br /> Runoff = 0.27 cfs(c� 12.02 hrs, Volume= 0.013 af, Depth> 0.67" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span=5.00-20.00 hrs, dt= 0.05 hrs <br /> Type II 24hr 2 Year Rainfall=2.75" <br /> Area (ac) CN Description <br /> 0.100 98 Paved parking &roofs <br /> 0.�0 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 Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (afs) <br /> 9.0 Direct Entry, <br />