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HomeMy WebLinkAboutApplication Files_82693_pg0656 72189 EX Type /it 24-hr 25-Year Storm Rainfall=5.50" Prepared by{enter your company name here3 Printed 7/26/2011 HydroCAD®9.10 s/n 01237.0 2009 HydroCAD Software Solutions LLC Page 29 Area(sf) CN _Description_ 421 36 Woods, Fair, HSG A 3,201 60 Woods, Fair, HSG B 4,142 35 Brush, Fair, HSG A 22,577 56 Brush, Fair, HSG B 20,538 69. 50-75% Grass cover, Fair, HSG B 11,925 98 Impervious 62,804 67 Weighted Average 50,879 81.01% Pervious Area 11,925 1.8.99% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) 10.8 50 0.0100 0.08 Sheet Flow,A-B Grass: Dense n= 0.240 P2= 3.20" 2.0 90 0.0111 0.74 Shallow Concentrated Flow, B-C Short Grass Pasture Kv= 7.0 fps 0.8 70 0.0429 1.45 Shallow Concentrated Flow, C-D Short Grass Pasture Kv=7.0 fps 2.0 90 0.0111 0.74 Shallow Concentrated Flow, D-E Short Grass Pasture Kv=7.0 fps 15.6 300 Total Summary for Subcatchment EX4C: Southern Portion of the Site Runoff = 6.87 cfs @ 12.20 hrs, Volume= 0.733 af, Depth= 1.17" 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 (so CN Description 4,866 61 >75% Grass cover, Good, HSG B 108,200 69 50-75% Grass cover, Fair, HSG B . 13,239 56. Brush, Fair, HSG B 109,370 49 50-75% Grass cover, Fair, HSG A 3,756 35 Brush, Fair, HSG A 80,174 36 Woods, Fair, HSG A 2,224 60 Woods, Fair, HSG B _ 5,661 98 Impervious 327,490 54 Weighted Average 321,829 98.27% Pervious Area 5,661 1.736/6 Impervious Area i