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4203 NORTH SHORE DRIVE Type ll 24-hr Rainfa11=2.80" <br /> Prepared by Terra Engineering Inc. Page 3 <br /> HydroCAD�7.00 s/n 001544 �1986-2003 Applied Microcomputer Systems 10/11/2005 <br /> Subcatchment 1S: EXISTING DRAIN/4GE AREA(FLOWS TO EASTj <br /> Runoff = 0.30 cfs @ 12.05 hrs, Volume= 0.016 af, Depth= 1.06" <br /> aunoff by SCS TR-20 method, UH=SCS, Time Span=5.00-20.00 hrs, dt= 0.05 hrs <br /> Type II 24hr R�infa11=2.80" <br /> Area (sfl CN Description <br /> 2,214 98 Paved parking &roofs <br /> �,931 74 >75% Grass cover, Good, HSG C <br /> 8,145 81 Weighted Average <br /> Tc Length Slope Velocity Capacity Description <br /> __�in) (feet) (ft/ft) (ft/sec) (cfs) <br /> 12.8 150 0.0800 0.2 Sheet Flow, <br /> Grass: Dense n= 0.240 P2�2.50" <br /> Subcatchment 2S: PROPOSED DRAINAGE AREA(FLOW3 TO EASTj <br /> Runoff = 0.16 cfs @ 12.p2 hrs, Volume= 0.008 af, Depth= 0.70" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Tqpe II 24-hr Rainfa11=2.80" <br /> Area_(sfl CN Description <br /> 6,177 74 >75% Grass cover, Good, HSG C <br /> Tc Length Slope Velocity Capacity Description <br /> �in (feet) (ft/ft) (ft/sec) (cfs) <br /> 9.4 80 0.0500 0.1 Sheet Flow, <br /> Grass: Dense n= 0.240 P2=2.50" <br />