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Home My WebLink AboutApplication Files_82693_pg0593 72189 PR Type 1/124-hr 25-Year Storm Rainfall=5.50" Prepared by{enter your company name here} Printed 5/31/2011 HydroCAD®9 10 s/n 01237 ©2009 HydroCAD Software Solutions LLC Page 1 - Summary for Subcatchment PR4D: Ellington Road Access - Entrance Runoff = 2.68 cfs @ 12.09 hrs, Volume= 0.194 af, Depth= 2.77" Runoff by SCS TR-20 method, UH=SCS,Time Span=0.00-72.00 hrs,dt=0.05 hrs Type Ill 24-hr 25-Year Storm Rainfall=5.50" Area(sf) CN Description * 10,711 98 Impervious 18,061 69 50-75% Grass cover, Fair, HSG B 3,341 49 50-75% Grass cover, Fair, HSG A 3,700 61 >75% Grass cover, Good, HSG B 1 838 39 >75% Grass cover, Good, HSG A 36,651 74 Weighted Average 25,940 70.78% Pervious Area 10,711 29.22% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Min.Tc=6.0 1 i 1