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11586 SPENSA-ORONO Type 1124-hr 100 yr Rainfall=6.00" <br /> Prepared by{enter your company name here} Page 17 <br /> HydroCAD®8.00 s/n 000837 0 2006 HydroCAD Software Solutions LLC 5/18/2009 <br /> Subcatchment IS: EXISTING <br /> Runoff = 4.50 cfs @ 12.03 hrs, Volume= 0.264 af, Depth> 4.54" <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=6.0011 <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 1S: EXISTING <br /> Hydrograph <br /> ----------- <br /> 4.50 cfs — Runoff <br /> I 1 1 I <br /> 1 1 I I 1 I I I I I <br /> Type II 24-hr h 00 yr <br /> _ . Rairifa11=6.00" <br /> I I I 1 I 1 I I I I I I <br /> RUnaff Asea=30,p50;sf <br /> N ' _--�_ I I 1 I I I I I I <br /> 3 ------------------- ----Runwff;Vol--O.�6*,af <br /> -- <br /> I I I I I I I <br /> 3 I I I I I I I <br /> I I <br /> Rupof( Depth�4.54" <br /> 1 I I 1 I <br /> ° 2 ___}___i__ ,____ TCF42,0_rnrn_ <br /> I 1 I I I I I i I I I <br /> I I I I I 1 dN=90 <br /> I I I I I I I I I I 1 <br /> 1 I I I I I 1 I I I I <br /> I I I I 1 1 I I I 1 I <br /> I I 1 I I 1 I 1 I I I 1 <br /> I I I I 1 1 I I I I 1 1 <br /> I I I I I 1 I 1 I I 1 I I <br /> I 1 1 I I I I I I I I i <br /> I 1 I I I 1 I I 1 I I 1 <br /> I I I I I I I I I 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 />