This third edition is the first major rewrite of HDS 5 since 1985, updating all previous information and adding new information on software solutions, aquatic organism passage, culvert assessment, and culvert repair and rehabilitation. The result is a comprehensive culvert design publication. The appendices of the publication contain the equations and methodology used in developing the design charts (nomographs) and software programs, information on hydraulic resistance of culverts, the commonly used design charts, and Design Guidelines (DG) illustrating various culvert design calculation procedures. The number of design charts provided has been reduced recognizing the increased use of software solutions; however, the full set of culvert design charts will continue to be available in the archived second edition of HDS 5.
The purpose of this Culvert Rating Guide is to present a clear, repeatable and valid procedure for TexasDepartment of Transportation (TxDOT) engineers...
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United States Department of Transportation
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