Cofferdam

Definition

Embankment to retain the water during the construction of a dam which will later be included in the water or airside support body; A temporary watertight structure enclosing all or part of the construction area so that construction can proceed in the dry.

Additional links

http://chl.erdc.usace.army.mil/chl.aspx?p=GlossaryItems&a=Glossary; 575

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Overview