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Civil Software Design -- SEDCAD+ Version 3.1 Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved. Company Name: PEABODY COAL COMPANY • Filename: C:\SEDCAD3\COALCANH User: lmr Date: 04-13-1996 Time: 09:53:46 Coal Canyon Runoff and Drainage Design Storm: 2.20 inches, 100 year-24 hour, SCS Type II Hydrograph Convolution Interval: 0.1 hr ----------------------------------------- NON-POND STRUCTURE INPUT/OUTPUT TABLE J2, B1, S1 Bookcliffs to CRDA3 Drainage Area from J2, B1, S1, SWS(s)1-3: 3465.9 acres Total Contributing Drainage Area: 7289.8 acres MATERIAL: GRADED LOAM TO COBBLES NONCOLLOIDAL Trapezoidal Earthen Channel Limiting Variable: Velocity = 5.000 fps Sediment-laden Water Design Bottom Manning's Discharge Width ZLeft ZRight Slope n (cfs) (f t) (%) ------------------------------------------------- • 927.26 40.0 2.0:1 2.0:1 0.2 0.030 Top Hydraulic Froude Depth Velocity Width Radius Number (ft) (fps) (ft) ----------------------------------------------- ----------------------------------------------- 3.95 4.90 55.8 3.280 0.47 w/ Freeboard: 4.25 57.0 Runoff Peak Volume Discharge (ac-ft) (cfs) ----------------------------- ----------------------------- IN/OUT 221.81 927.26 +~++~++~~,r**++++*****++****+*+****,r+**+,r+,r*~:r~*++,r+*++++~+***~~+++****,r~+~+t~*+ J2, B2, S1 Coal Gulch Drainage Area from J2, B2, S1, SWS(s)1-2: 493.5 acres Total Contributing Drainage Area: 493.5 acres MATERIAL: Rock Riprap Trapezoidal Riprap Channel Steep Slope Design - Simons/OSM Method • Design Bottom Manning's Discharge Width ZLeft ZRight Slope n (cfs) (ft) (%) ------------------------------------------------- ------------------------------------------------- 212.31 20.0 2.0:1 2.0:1 6.6 0.039 MISC - 16 (New 3/1/96)