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• <br />Civil Software Design -- SEDCAD+ Version 3.1 <br />Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved. <br />Filename: <br />W. PIT/TAYLOR <br />Storm: 2.80 <br />Company Name: COLOWYO COAL COMPANY <br />C:\SEDCAD3\WDTCH100 User: JUAN GARCIA <br />Date: 08-13-1995 Time: 10:40:09 <br />TRIB./GULCH B OR W.PIT FILL POSTMINING RIPRAP DITCH DES. <br />inches, 100 year-24 hour, SCS Type II <br />Hydrograph Convolution Interval: 0.1 hr <br />----------------------------------------- <br />----------------------------------------- <br />NON-POND STRUCTURE INPUT/OUTPUT TABLE <br />----------------------------------------- <br />----------------------------------------- <br />J1, B2, S1 <br />W. PIT DITCH <br />Drainage Area from J1, B2, S1, SWS(s)1: 245.4 acres <br />Total Contributing Drainage Area: 245.4 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - PARER Method <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) (%) <br />36.10 12.0 2.0:1 2.0:1 15.0 0.048 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br />----------------------------------------------- <br />----------------------------------------------- <br />0.43 6.51 13.7 0.398 1.80 <br />w/ Freeboard: 0.73 14.9 <br />----DMax---- ----D50---- ----D10---- <br />(ft) (in) (ft) (in) (ft) (in) <br />------------------------------------------ <br />0.63 7.50 0.50 6.00 0.17 2.00 <br />Runoff Peak <br />Volume Discharge <br />(ac-ft) (cfs) <br />IN/OUT 7.21 36.10 <br />a**t+,t***:tt*****~*t***++t**t**t+*t,r**,t*+,t*+*t*~,t+*,t****:t~t~**~~***+*,t *i.+t*:t :t*tet <br />J2, Bl, S1 <br />TAYLOR TRIB. DITCH <br />Drainage Area from J2, B1, S1, SWS(s)1-2: 270.9 acres <br />Total Contributing Drainage Area: 783.0 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - PARER Method <br />Design Bottom Manning's <br />