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Z:1HydroCAD1HCDATAIMBBI As Built <br /> 11586 SPENSA - ORONO -revised 10-28-09 Grout Riprap Type 1124-hr 10 yr Rainfall=4.20" <br /> Prepared by Anderson Engineering of MN LLC Page 6 <br /> HydroCADO 8.00 s/n 000837 ©2006 HydroCAD Software Solutions LLC 10/29/2009 <br /> Subcatchment 2P: PROPOSED <br /> Runoff = 0.76 cfs @ 12.02 hrs, Volume= 0.049 af, Depth> 3.90" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span=4.00-27.00 hrs, dt= 0.05 hrs <br /> Type II 24-hr 10 yr Rainfall=4.20" <br /> Area (so CN Description <br /> 6,630 98 Paved parking & roofs <br /> 6,630 Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 11.0 Direct Entry,Typical Inspection <br /> Subcatchment 2X: EXISTING <br /> Runoff = 0.73 cfs @ 12.03 hrs, Volume= 0.047 af, Depth> 3.72" <br /> Runoff by SCS TR-20 method, UH=SCS, Time Span=4.00-27.00 hrs, dt= 0.05 hrs <br /> Type II 24-hr 10 yr Rainfall=4.20" <br /> Area (so CN Description <br /> 1,140 85 Gravel roads, HSG B <br /> 5,490 98 Paved parking & roofs <br /> 6,630 96 Weighted Average <br /> 1,140 Pervious Area <br /> 5,490 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 /> Reach Q -exist: Q (existing) <br /> Inflow Area = 1.130 ac, Inflow Depth > 3.02" for 10 yr event <br /> Inflow = 4.68 cfs @ 12.03 hrs, Volume= 0.285 of <br /> Outflow = 4.68 cfs @ 12.03 hrs, Volume= 0.285 af, Atten= 0%, Lag= 0.0 min <br /> Routing by Stor-Ind+Trans method, Time Span=4.00-27.00 hrs, dt= 0.05 hrs <br /> Reach Q-asbuilt: Q (asbuilt) <br /> Inflow Area = 1.129 ac, Inflow Depth > 1.65" for 10 yr event <br /> Inflow = 2.55 cfs @ 12.12 hrs, Volume= 0.156 of <br /> Outflow = 2.55 cfs @ 12.12 hrs, Volume= 0.156 af, Atten= 0%, Lag= 0.0 min <br />