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11586 SPENSA - ORONO Type 11 24-hr 100 yr Rainfall=6.00" <br /> Prepared by{enter your company name here) Page 16 <br /> HydroCAD®8.00 s/n 000837 ©2006 HydroCAD Software Solutions LLC 5/18/2009 <br /> Subcatchment 1P: PROPOSED <br /> Runoff = 6.81 cfs @ 12.01 hrs, Volume= 0.378 af, Depth> 4.64" <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 100 yr Rainfall=6.00" <br /> Area (sf) 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 /> 7 <br /> 6.81 cfs — Runoff <br /> ---r--- --- --------r---r--- ---�--- --------r---r---r------- <br /> Ty pe II 24-hr 100 yr <br /> - Rainfall=6.00" <br /> 5 ---L---1---- ---- ------RU OffAkea�426401sf- <br /> Runoff Volume=0.378 of <br /> -- 4 --- ----------------- -- -- <br /> 3 - ; --- ----Ru'of(De—tha4.4,4"- <br /> M 3 -------------------- ---�-- ' --- --- -------- Ic='10�0_rxlin_ <br /> 2 <br /> 1 _ -- : --- <br /> 0 1 1 1 1 1 1 1 <br /> 1 1 <br /> 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 <br /> Time (hours) <br />