United States Department of Transportation
i
Guidelines for replacement of deficient bridges with low-water stream crossings in the rural Midwest : technical summary.
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2017-02-01
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[PDF-678.03 KB]
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Alternative Title:Guidelines for replacement of deficient bridges with low-water stream crossings in the rural Midwest.
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Abstract:This report provides guidance to public officials and engineers considering the replacement of a deficient or obsolete bridge with a low-water stream crossing (LWSC). An LWSC is a structure that is occasionally overtopped by floodwaters and is likely to be impassable for a few hours or days in a normal year. LWSC structures include unvented fords, vented fords, low-water culverts, low-water bottomless culverts, and low-water bridges. LWSCs are sometimes constructed to keep very low-volume roads open where the cost of a normal bridge cannot be justified. The lower initial cost of an LWSC must be balanced against maintenance requirements and safety considerations.
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