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Revision as of 19:24, 1 December 2007 by Ok (talk | contribs) (Based on Glossary of Bridge Terminology; Chapter LXXX of J.A.L. Waddell's Bridge Engineering (New York: Wiley, 1916))
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A depression or hole in a pier foundation, used to collect drainage water so that it may be pumped out; also a hole under a building or in a tunnel for the same purpose.