2014-01064 - retaining wall - Laserfiche WebLink

Home Browse Search

Buhman Culvert Type 1124-hr 10-Year Rainfaii=4.25" Prepared by Civil Methods, Inc. Printed 9/26/2014 HydroCAD@ 10.00-12 s/n 07283 @ 2014 HydroCAD Software Solutions LLC Paae 3 Summary for Subcatchment 1S: Culvert Watershed Runoff = 7.27 cfs @ 12.47 hrs, Volume= 0.964 af, Depth> 0.77" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-Year Rainfall=4.25" Area (ac) CN Description 10.140 55 Woods, Good, HSG B 4.950 70 Woods, Good, HSG C 15.090 60 Weighted Average 15.090 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 22.7 100 0.0200 0.07 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.86" 3.0 200 0.0500 1.12 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 15.2 250 0.0030 0.27 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 1.2 800 0.0600 11.27 248.02 Trap/Vee/Rett Channel Flow, Bot.W=3.00' D=2.00' Z= 4.0 '/' Top.W=19.00' n= 0.035 42.1 1,350 Total Summary for Pond 2P: Culvert Inflow Area = 15.090 ac, 0.00% Impervious, Inflow Depth > 0.77" for 10-Year event Inflow = 7.27 cfs @ 12.47 hrs, Volume= 0.964 of Outflow = 7.27 cfs @ 12.47 hrs, Volume= 0.964 af, Atten= 0%, Lag= 0.0 min Primary = 7.27 cfs @ 12.47 hrs, Volume= 0.964 of Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 961.05' @ 12.47 hrs Device Routing Invert Outlet Devices #1 Primary 959.20' 18.0" Round Culvert L= 24.0' CMP, end-section conforming to fill, Ke= 0.500 Inlet/ Outlet Invert= 959.20' / 958.90' S= 0.0125 '/' Cc= 0.900 n= 0.024, Flow Area= 1.77 sf #2 Secondary 962.00' 30.0' long x 15.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 rimary OutFlow Max=7.25 cfs @ 12.47 hrs HW=961.04' (Free Discharge) 1=Culvert (Barrel Controls 7.25 cfs @ 4.26 fps) §econdary OutFlow Max=0.00 cfs @ 5.00 hrs HW=959.20' (Free Discharge) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)