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HomeMy WebLinkAboutApplication Files_82693_pg0769 72189 PR Type Ill 24-hr 900-Year Storm Rainfall=6.90" Prepared by{enter your company name here} Printed 7/26/2011 ' HydroCAD®9.10 s/n 01237 02009 HydroCAD Software Solutions LLC Page 91 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) , 5.1 50 0.1800 0.16 Sheet Flow,A-B Woods: Light underbrush n= 0.400 P2= 3.20" ' 3.3 180 0.0333 . 0.91 Shallow Concentrated Flow, B-C Woodland Kv= 5.0 fps 2.4 8.0 0.0125 0.56 Shallow Concentrated Flow,C-D Woodland Kv= 5.0 fps ' 0.0 10 0.2000 6.71 Shallow Concentrated Flow, D-E Grassed Waterway Kv= 15.0 fps 1.4 160 0.0156 1.87 Shallow Concentrated Flow, E-F ' Grassed Waterway Kv= 15.0 fps 12.2 480 Total Summary for Subcatchment PR4D: Ellington Road Access -.Entrance ' Runoff - 3.82 cfs @ 12.09 hrs, Volume= 0.277 af, Depth= 3.96" , 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 , 7- 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 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 , Summary for Reach R41): Water Quality Swale 1 [80]Warning: Exceeded Pond PR4E by 1.00'@ 0.00 hrs(2.38 cfs 13.694 af) ' Inflow Area = 0.841 ac, 29.22% Impervious, Inflow Depth= 1.63" for 100-Year Storm event ' Inflow - 3.49 cfs @ 12.10 hrs, Volume= 0.114 of Outflow = 3.40 cfs @ 12.11 hrs, Volume= 0.114 af, Atten=2%, Lag=0.5 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs , Max.Velocity= 2.11 fps, Min.Travel Time= 0.8 min Avg. Velocity=0.78 fps, Avg. Travel Time= 2.1 min Peak Storage= 161 cf @ 12.11 hrs ' Average Depth at Peak Storage= 0,19' Bank-Full Depth= 1.00', Capacity at Bank-Full= 62.31 cfs '