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<br />2058.0010 EX Drain <br />Prepared by {enter your company name here} <br />HydroCA[)@8.00 sin 001304 @2006 HYdroCAD Software Solutions LLC <br /> <br />Type /I 24-hr 2- Year; 24 hour Rainfal/=2.70" <br />Page 3 <br />8/31/2007 <br /> <br />Subcatchment Ex Site: Site <br /> <br />Runoff <br /> <br />= <br /> <br />4.28 efs@ 12.06 hrs, Volume= <br /> <br />0.264 af, Depth> 0.97" <br /> <br />Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs <br />Type II 24-hr 2-Year; 24 hour Rainfall=2.70" <br /> <br />Area (sf) CN Description <br /> 5,152 98 20th Avenue Pavement <br /> 24,206 85 Wetland <br /> 113,147 77 Brush, Poor, HSG C <br /> 142,505 79 Weighted Average <br /> 137,353 Pervious Area <br /> 5,152 Impervious Area <br />Tc Length Slope Velocity Capacity <br />(min) (feet) (ftlfl) (ftlsec) (efs) <br />8.4 100 0.0300 0.20 <br />4.9 440 0.0100 1.50 <br />13.3 540 Total <br /> <br />Description <br /> <br />Sheet Flow, Southwest sheet flow <br />Range n= 0.130 P2= 2.50" <br />Shallow Concentrated Flow, <br />Grassed Waterway Kv= 15.0 fps <br />