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Civil Software Design -- SEDCAD+ Version 3.1 <br />Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved. <br />• Company Name: COLOWYO COAL COMPANY <br />Filename: C:\SEDCAD3\PDTCH200 User: JUAN GARCIA <br />Date: 10-17-1995 Time: 15:22:58 <br />FINAL E. PIT AND PROSPECTS POST MINING RIPRAP DITCH DESIGNS <br />Storm: 2.80 inches, 100 year-24 hour, SCS Type II <br />Hydrograph Convolution Interval: 0.1 hr <br />NON-POND STRUCTURE INPUT/OUTPUT TABLE <br />J1, B2, S1 <br />FINAL E. PIT DITCH <br />Drainage Area from J1, B2, S1, SWS(s)1: 268.9 acres <br />Total Contributing Drainage Area: 268.9 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - PADER Method <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) ( _) <br />• 56 91 12 0 2 0:1 2 0:1 14.0 0 058 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br />0 64 6 65 14 6 0 575 1 53 <br />w/ Freeboard: 0.94 15.8 <br />----DMax---- ----D50---- ----D10---- <br />(ft) (in) (ft) (in) (ft) (in) <br />------------------------------------------ <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 />----------------------------- <br />----------------------------- <br />IN/OUT 7.90 56.91 <br />~~**~+~+**~+~+~********++*~+****~**,r**,r~*,r,r****,r**,r*************:r*:r************ <br />J2, B2, 51 <br />PROSPECTS DITCH <br />Drainage Area from J2, B2, S1, SWS(s)1-2: 202.1 acres <br />Total Contributing Drainage Area: 202.1 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - PADER Method <br />Design Bottom Manning's <br />