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Home My WebLink AboutApplication Files_82693_pg0763 72189 PR Type Ill 24-hr 100-Year Storm Rainfall=6.90" Prepared by{enter your company name here) Printed 7/26/2011 , HydroCAD®910 s1n 01237 ©2009 HydroCAD Software Solutions LLC Page 85 Area (sf) CN Description , 18,197 56 Brush, Fair, HSG B 2,778 98 Water Surface 62,774 98 Paved parking 10,808 61 >75% Grass cover, Good, HSG B , 94,557 86 Weighted Average 29,005 30.67% Pervious Area 65,552 69.33% Impervious Area ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) ' 6.0 Direct Entry, Min.Tc=6.0 Summary for Subcatchment PR'I F: Chapel Road Driveway & OfEsite Abutter ' Runoff = 22.30 cfs @ 12.17 hrs, Volume= 2.043 af, Depth= 5.27 Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt=0.05 hrs , Type III 24-hr 100-Year Storm Rainfall=6.90" 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) (ftJft) (fusee) (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 ' Summary for Subcatchment PRIG: Offsite Abutter Runoff = 13.61 cfs @ 12.09 hrs, Volume= 0.986 af, Depth= 3.64" ' Runoff by SCS TR-20 method, UH=SCS,Time Span=0.00-72.00 hrs, dt= 0.05 hrs ' Type III 24-hr 100-Year Storm Rainfall=6.90"