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Home My WebLink AboutApplication Files_82693_pg0867 ' 72189 PR Type 111 24-hr 100-Year Storm Rainfall=6.90" Prepared by VHB Printed 3/9/2010 HydroCAD®9.00 s/n 01237 02009 HydroCAD Software Solutions LLC Page 8 ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) ' 0.5 50 0.0420 1.61 Sheet Flow, A-B Smooth surfaces n= 0.011 P2= 3.20" 0.4 86 0.0290 3.46 Shallow Concentrated Flow, B-C Paved Kv= 20.3 fps ' 1.9 495 0.0030 4.27 13.42 Pipe Channel, C-D 24.0" Round Area= 3.1 sf Perim= 6.3' r= 0.50' n= 0.012 1.1 333 0.0030 4.96 24.34 Pipe Channel, D-E ' 30.0" Round Area=4.9 sf Perim= 7.9' r= 0.63' n= 0.012 1.4 485 0.0030 5.60 39.58 Pipe Channel, E-F 36.0" Round Area= 7.1 sf Perim= 9.4' r= 0.75' n= 0.012 0.7 Direct Entry, Min. Tc=6.0 6.0 1,449 Total Summary for Subcatchment PR11: Railroad Tracks ' Runoff = 6.27 cfs @ 12.22 hrs, Volume= 0.625 af, Depth= 2.25" 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 18,985 60 Woods, Fair, HSG B 7,285 35 Brush, Fair, HSG A 9,727 85 Gravel roads, HSG B 109,333 56 Brush, Fair, HSG B 145,330 57 Weighted Average 145,330 100.00% Pervious Area ' Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) ' 14.2 50 0.0140 0.06 Sheet Flow, A-B Woods: Light underbrush n= 0.400 P2= 3.20" 0.6 75 0.2000 2.24 Shallow Concentrated Flow, B-C ' Woodland Kv= 5.0 fps 14.8 125 Total ' Summary for Subcatchment PRU: Pervious Pavement Areas Runoff = 30.05 cfs @ 12.09 hrs, Volume= 2.184 af, Depth= 4.17" ' 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"