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C:�Program Files�FiydroCAD�Projects�-IydroCAD Projects�08 JOBS\ <br /> 081756 Barry Sewall Proposed Conditions Type 1l 24hr 2 Year Rainfal1=2.75" <br /> Prepared by Gronberg &Associates, Inc. Page 4 <br /> HydroCAD�8.00 s/n 004529 �2006 HydroCAD Soflware Solutions LLC 11/13/2008 4:11:12 PM <br /> Subcatchment A1: Area 1 <br /> Runoff = 0.16 cfs� 12.07 hrs, Volume= 0.016 af, Depth> 0.18" <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 /> 0.080 98 Paved parking &roofs <br /> 0.050 61 >75%Grass cover, Good, HSG B <br /> 0.930 55 Woods, Good, HSG B <br /> 1.060 59 Weighted Average <br /> 0.980 Pervious Area <br /> 0.080 Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ff/ft) (ft/sec) (cfs) <br /> 10.0 Dir�ect Entry, <br /> Subcatchment A2: Area 2 <br /> Runoff = 0.09 cfs cLD 12.08 hrs, Volume= 0.012 af, Depth> 0.16" <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 /> 0.020 98 Paved parking&roofs <br /> 0.240 61 >75% Grass cover, Good, HSG B <br /> 0.600 55 Woods, Good, HSG B <br /> 0.860 58 Weighted Average <br /> 0.840 Pervious Area <br /> 0.020 Impervious Area <br /> Tc Length Slope Velociiy Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 10.0 Direct Entry, <br /> Subcatchment A3: Area 3 <br /> Runoff = 1.01 cfs @ 12.�hrs, Volume= 0.059 af, Depth> 0.51" <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 />