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HomeMy WebLinkAboutApplication Files_82693_pg0572 72189 PR Type/H 24-hr 25-Year Storm Ralnfall=5.50" Prepared by{enter your company name here} Printed 5/31/2011 -- ---HydroCAD®9 10 s/n 01237 02009 HydroCAD Software Solutions LLC Page 1 Summary for Subcatchment PR1 F: Chapel Road Driveway&Mite Abutter Runoff = 16.86 cfs @ 12.17 hrs, Volume= 1.526 af, Depth= 3.94" Runoff by SCS TR-20 method, UH=SCS,Time Span=0.00-72.00 hrs, dt=0.05 hrs Type III 24-hr 25-Year Storm Rainfall=5.50" ' Area(sf) CN Description 123,260 98 Impervious 18,176 61 >75% Grass cover, Good, HSG B 61,215 69 50-75% Grass cover, Fair HSG B 202,651 86 Weighted Average 79,391 39.18% Pervious Area 123,260 60.82% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.6 50 0.0200 0.15 Sheet Flow,A B Grass: Short n=0.150 P2=3.20" 2.5 310 0.0100 2.03 Shallow Concentrated Flow, B-C Paved Kv= 20.3 fps 4.7 444 0.0110 1.57 Shallow Concentrated Flow, B-C Grassed Waterway Kv= 15.0 fps 12.8 804 Total M