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A culvert is a closed conduit used to convey water from one area to another, usually from one side of a road to the other side. Culverts generally pass underneath a road, railway or embankment. Cross-drainage culverts let water that isn't confined to a perennial or intermittent stream channel move from one side of the road to the other without crossing the surface. Proper use of cross-drainage culverts can improve water quality while allowing forest operations to continue. Generally made of corrugated steel, these culverts need to be replaced on a regular basis. In between replacements, culverts will often need to be cleaned of debris to allow the unimpeded flow of water.
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