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t <br /> 11586 SPENSA-ORONO Type 1124-hr 2 yr Rainfall=2.80" <br /> Prepared by{enter your company name here} Page 4 <br /> HydroCAD®8.00 s/n 000837 ©2006 HydroCAD Software Solutions LLC 5/18/2009 <br /> Subcatchment 1 P: PROPOSED <br /> Runoff = 2.73 cfs @ 12.01 hrs, Volume= 0.143 af, Depth> 1.76" <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 yr Rainfall=2.80" <br /> Area (sfl CN Description <br /> 1,590 61 >75% Grass cover, Good, HSG B <br /> 190 61 >75% Grass cover, Good, HSG B <br /> 2,340 61 >75% Grass cover, Good, HSG B <br /> 7,240 85 Gravel roads, HSG B <br /> 4,660 85 Gravel roads, HSG B <br /> 20,460 98 Paved parking & roofs <br /> 6,060 98 Building <br /> 42,540 91 Weighted Average <br /> 16,020 Pervious Area <br /> 26,520 Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 10.0 Direct Entry,Typical Inspection <br /> Subcatchment 1 P: PROPOSED <br /> Hydrograph <br /> 3- ---;---;---,----------- 2.73 cfs -- ----------------;--- ---- <br /> — Runoff <br /> ;Type II 24-hr 2 yr <br /> Rair fa11�2.619 <br /> -- <br /> 2 --- --- --- --------;--- ---- --- --RunfA�kea42, i40s# <br /> ;Rumoff;Vo1um#=0.;143'of <br /> Ru�of( Deptha1.76" <br /> u` Tc=10,0 rain <br /> 1 --- i----------- - -- -- tV= 1-- <br /> J1 <br /> 0 <br /> 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 <br /> Time (hours) <br />