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Civil Software Design -- SEDCAD+ Version 3.0 <br />Copyright (C) 1967-1990. Pamela J. Schwab. All rights reserved. <br />Company Name: Peabody Coal Company <br />Filename: C:\SEDCAD3\TAHRDSA User: RJG <br />Date: 07-03-1990 Time: 09:23:12 <br />SENECA II-W TAHR DITCH D-SA <br />Storm: 1.60 inches, 10 year-24 hour, SCS Type II <br />Hydrograph Convolution Interval: 0.1 hr <br />------------------------------------ <br />NON-POND STRUCTURE INPUT/OUTPUT TABLE <br />----------------------------------------- <br />J1, B1, S1 <br />DITCH D-5A <br />Drainage Area from J1, B1, S1, SWS(s)1: 19 acres <br />Total Contributing Drainage Area: 19 acres <br />MATERIAL: GRADED SILTS TO COBBLES COLLOIDAL <br />Trapezoidal Earthen Channel <br />Limiting Variable: Velocity = 5.500 fps <br />Sediment-laden Water <br /> <br />Design Bottom Manning's <br />Discharge width ZLeft ZRight Slope n <br />(cfs) <br />---------- (ft) <br />--------- <br />-------- (~) <br />------------- <br />--------- <br />---------- <br />8.19 --------- <br />2.0 -------- <br />2.0:1 -------------- <br />2.0:1 0.1 -------- <br />0.030 <br /> Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br /> <br />1.32 1.33 7.3 0.776 0.25 <br />i <br />J <br />Runoff Peak <br />Volume Discharge ' <br />(ac-ft) (cfs) <br />----------------------- <br />----------------------- <br />IN/OUT 0.62 8.14 <br />• <br />