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11586 SPENSA - ORONO Type//24-hr 10 yr Rainfall=4.20" <br /> Prepared by{enter your company name here} Page 10 <br /> HydroCAD®8.00 s/n 000837 ©2006 HydroCAD Software Solutions LLC 5/18/2009 <br /> Subcatchment 1P: PROPOSED <br /> Runoff = 4.52 cfs @ 12.01 hrs, Volume= 0.245 af, Depth> 3.01" <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 10 yr Rainfall=4.20" <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 /> 5 ---, --- ,--- 1----,----,--- -------"-- -----, -'-- I ------- Runoff <br /> 4.52 cfs <br /> I I 1 I I I I I I I I I <br /> 1 I 1 I I 1 1 I I 1 1 I <br /> Type II 24-ht 101yr <br /> 4 ---- ---- --------------- -- - --------------_---- <br /> Rairifa11=4.20" <br /> I I 1 I I I I 1 I 1 I I I <br /> RUnaff Asea- 42,646sf <br /> 1 I ! <br /> .V 3 ---;---,---,----,----,--- --- ---;RUi ff:Vol' --O.T246,af- <br /> ," ` RU�00 Deptha3.6,1" <br /> 3 1 I I I I I I I <br /> I I I I I I I I <br /> O I I I ! I 1 z= 1 „ <br /> 2 ---t---t----I----I----I_---h-- I ----F---''----I----I-Ic f _`0,0_ in_ <br /> I 1 I I I I I I I I I I I <br /> I I I I I I I 1 I I I <br /> I I I I I I I 1 I I I I I <br /> I 1 1 1 I 1 I 1 I I I I I <br /> I I I I I 1 I 1 I I I I I <br /> _I_ <br /> I 1 1 I 1 1 I <br /> I I I I I I I 1 I I I I I I <br /> I I I 1 I I 1 1 I I I I I 1 <br /> I I 1 I I I I I I I I I 1 <br /> I 1 I I I I I I I 1 1 I 1 <br /> 1 I I I I I I I 1 I I <br /> 0- <br /> 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 <br /> Time (hours) <br />