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<br />ATTACHMENT 13-7 <br />PIPE CULVERT ANALYSIS <br />COMPUTATION OF CULVERT PERFORMANCE CURVE <br />November 1, 1990 <br />PROGRAM INPUT DATA: H4 <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 />r ~ <br />L J <br />PROGRAM RESULTS: <br />Flow Tailwater Headwater (ft) Normal Critical Depth at Outle <br />Rate Depth Inlet Outlet Depth Depth Outlet Velocit <br />(cfs) (ft) Control Control (ft) (ft) (ft) (fpa <br />------------------------------------------------------------------- <br />1.8 1.00 0.64 -4.74 0.35 0.46 0.35 4.E <br />------------------------------------------------------------------- <br />------------------------------------------------------------------- <br />PIPE CULVERT ANALYSIS COMPUTER PROGRAM Version 1.5 Copyright (c)19E <br />Dodson & Associates, Inc., 7015 W. Tidwell, #107, Houston, TX 770P <br />(713) 895-832?_. All Rights Reserved. <br />• <br />