Cofferdam
English Meaning
A water- tight inclosure, as of piles packed with clay, from which the water is pumped to expose the bottom (of a river, etc.) and permit the laying of foundations, building of piers, etc.
- A temporary watertight enclosure that is pumped dry to expose the bottom of a body of water so that construction, as of piers, may be undertaken.
- A watertight chamber attached to the side of a ship to facilitate repairs below the water line.
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