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1 , <br /> 11586 SPENSA - ORONO Type 11 24-hr 2 yr Rainfall=2.80" <br /> Prepared by{enter your company name here} Page 5 <br /> HydroCAD®8.00 s/n 000837 ©2006 HydroCAD Software Solutions LLC 5/18/2009 <br /> Subcatchment 1S: EXISTING <br /> Runoff = 1.76 cfs @ 12.04 hrs, Volume= 0.097 af, Depth> 1.67" <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 (sf) CN Description <br /> 1,590 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 /> 1,360 85 Gravel roads, HSG B <br /> 11,760 98 Paved parking &roofs <br /> 6,060 98 Building <br /> 30,350 90 Weighted Average <br /> 12,530 Pervious Area <br /> 17,820 Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 12.0 Direct Entry, Typical Inspection <br /> Subcatchment IS: EXISTING <br /> Hydrograph <br /> 1 1 1 1 1.76 cfs 1 1 1 1 1 Runoff <br /> 1 1 I I I I I I I I <br /> I I 1 I 1 I I I I I 1 I <br /> I I I I I I I I I I 1 1 <br /> ;Type 11 ,24-hr Zyr <br /> RairifallT2.80" <br /> Rum# Asea=30,P50;sf <br /> HI I I I I I � I I I I <br /> �Run'off;Volumo=0.097;I of <br /> ---' ' <br /> -- --- -- ,- , --- - -- Runoff-Depth> 1-.07"- <br /> O 1 1I 1 1 1 1 I I I <br /> ; TC612:0 min <br /> I I I I I I I I I I I /1`� I <br /> I I I I I 1 I 4N=00 <br /> YY <br /> I 1 I I I I I 1 I I I I I <br /> I I I I I I I 1 1 1 I I <br /> 1 1 I I I I I 1 I I I I I <br /> I I I I 1 I I I 1 I I 1 <br /> I I I I I I I I 1 1 I I I <br /> I 1 I 1 I I I 1 I I I I 1 <br /> I I I I 1 I I I 1 1 I I 1 <br /> I 1 1 1 I I I 1 1 1 I t <br /> I 1 I 1 I I I I I I 1 <br /> 0 <br /> f ' 6 7 ­'8" ­6­10 11 12 13 14 15 16 17 18 19 20 <br /> Time (hours) <br />