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Civil Software Design -- SEDCAD+ Version 3.1 Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved. Company Name: COLOWYO COAL COMPANY Filename: C:\SEDCAD3\PW1 User: JUAN GARCIA Date: 07-18-1994 Time: 13:10:51 PROSPECT POND HYDROLOGY/SEDIMENTOLOGY & WATER CONTROL STRUCTURES Storm: 1.80 inches, 10 year-24 hour, SCS Type II Hydrograph Convolution Interval: 0.1 hr ------------------------------------------- ------------------------------------------- ELEVATION-AREA-CAPACITY-DISCHARGE TABLE ------------------------------------------- ------------------------------------------- J4, B1, S1 PROSPECT POND Drainage Area from J4, B1, S1, SWS(s)1: 20.1 acres Total Contributing Drainage Area: 745.1 acres SW#1: Drop Inlet SW$2: Emergency Spillway Elev Stage Area Capacity Discharge (ft) (ac) (ac-ft) (cfs) ------- 6736.00 ---- -- 0.00 ------- 0.15 - ------- 0.00 ---- - 5736.00 0.00 0.15 0.00 6736.13 0.00 0.16 0.02 0.00 Top of Sediment Storage (0 Stage) ' '7.00 0.87 0.23 0.17 0.00 ~.~8.00 1.87 0.33 0.45 0.00 6739.00 2.87 0.35 0.79 0.00 6740.00 3.87 0.37 1.15 0.00 6741.00 4.87 0.39 1.52 0.00 6742.00 5.87 0.40 1.92 0.00 6743.00 6.87 0.42 2.33 0.00 6744.00 7.87 0.44 2.77 0.00 6745.00 8.87 0.46 3.22 0.00 6746.00 9.87 0.48 3.69 0.00 6747.00 10.87 0.50 4.18 0.00 6748.00 11.87 0.53 4.69 0.00 6749.00 12.87 0.55 5.23 0.00 6750.00 13.87 0.58 5.80 0.00 6751.00 14.87 0.61 6.39 0.00 , 6752.00 15.87 0.64 7.02 0.00 6752.10 15.97 0.64 7,08 0.00 Stage of SW#1 6752.43 16.30 0.64 7.29 1.30 Peak Stage 6753.00 16.87 0.66 7.67 3.59 Stage of SW#2 6753.53 17.40 0.66 8.02 16.81 6753.63 17.50 0.68 8.09 19.30 6753.73 17.60 0.68 8.16 23.71 6753.83 17.70 0.68 8,22 29.74 6753.93 17.80 0.69 8,29 35.70 654.00 17.87 0.69 8,34 42.79 E :.43 18.30 0.71 8.64 75.29 6754.93 1B.80 0.74 9.00 128.93 6755.00 18.87 0.74 9.06 141.30 _++*+.++ .*.**** .**..++ *+++*++++.*~~+++*++~t+ .++*+*.+++*+++*++.++++.*+++~.+.***+ PAGE 14