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Cofferdams (Pmhmbc)

Barriers built in the water so as to form an enclosure from which the water is pumped to permit free access to the area within. Also, water-tight enclosures used for obtaining a dry foundation for bridges, piers, etc. Usually constructed of two rows of piles with clay packed between them, extending above high-water mark; the water being pumped out so as to leave the enclosure dry. (Source: AASHTO Glossary)
Broader Term
Types of dams (Pmhmb)
Related Terms (Hierarchical)
Arch dams (Pmhmbb)
Concrete dams (Pmhmbd)
Earth dams (Pmhmbe)
Gravity dams (Pmhmbg)
Rockfill dams (Pmhmbr)
Weirs (Pmhmbw)