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i <br />ATTACHMENT 13-7 <br />PIPE CULVERT ANALYSIS <br />COMPUTATION OF CULVERT PERFORMANCE CURVE <br />November 1, 1990 <br />PROGRAM INPUT DATA: H6 <br />DESCRIPTION VALL <br />------------------------------------------------------------------- <br />Culvert Diameter (feet) ................................. 2.00 <br />FHWA Chart Number (1,2 or 3) ............................ 2 <br />Scale Number on Chart (Type of Culvert Entrance)........ 3 <br />Manning's Roughness Coefficient (n-value) ............... 0.024 <br />Entrance Loss Coefficient of Culvert Opening............ 0.50 <br />Culvert Length (feet) ........ .......................... 120.0 <br />Culvert Slope (feet per foot) ........................... 0.05C <br />~ J <br />PROGRAM RESULTS: <br />Flow Tailwater <br />Rate Depth <br />(cfs) (ft) <br />3.1 1.00 <br />Headwater (ft) Normal Critical <br />Inlet Outlet Depth Depth <br />Control Control (ft) (ft) <br />------------------------------- <br />0.87 -4.59 0.45 0.61 <br />Depth at Outle <br />Outlet Velocit <br />(ft) (fps <br />---------------- <br />0.45 5.i <br />------------------------------------------------------------------- <br />------------------------------------------------------------------- <br />PIPE CULVERT ANALYSIS COMPUTER PROGRAM Version 1.5 Copyright (c)19E <br />Dodson & Associates, Inc., 7015 W. Tidwell, #107, Houston, TX 7709 <br />(713) 895-8322. All Rights Reserved. <br />• <br />