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- Cofferdam abstract "A cofferdam (also called a coffer) is a temporary enclosure built within, or in pairs across, a body of water and constructed to allow the enclosed area to be pumped out, creating a dry work environment for the major work to proceed. Enclosed coffers are commonly used for construction and repair of oil platforms, bridge piers and other support structures built within or over water. These cofferdams are usually welded steel structures, with components consisting of sheet piles, wales, and cross braces. Such structures are typically dismantled after the ultimate work is completed.For dam construction, two cofferdams are usually built, one upstream and one downstream of the proposed dam, after an alternative diversion tunnel or channel has been provided for the river flow to bypass the dam foundation area. These cofferdams are typically a conventional embankment dam of both earth- and rock-fill, but concrete or some sheet piling also may be used. Typically, upon completion of the dam and associated structures, the downstream coffer is removed and the upstream coffer is flooded as the diversion is closed and the reservoir begins to fill. Dependent upon the geography of a dam site, in some applications, a "U"-shaped cofferdam is used in the construction of one half of a dam. When complete, the cofferdam is removed and a similar one is created on the opposite side of the river for the construction of the dam's other half.The cofferdam is also used on occasion in the shipbuilding and ship repair industry, when it is not practical to put a ship in drydock for repair or alteration. An example of such an application is certain ship lengthening operations. In some cases a ship is actually cut in two while still in the water, and a new section of ship is floated in to lengthen the ship. Torch cutting of the hull is done inside a cofferdam attached directly to the hull of the ship; the cofferdam is then detached before the hull sections are floated apart. The cofferdam is later replaced while the hull sections are welded together again. As expensive as this may be to accomplish, use of a drydock may be even more expensive. See also caisson.A 100 ton open caisson that was lowered more than a mile to the sea floor in attempts to stop the flow of oil in the Deepwater Horizon oil spill has been called a cofferdam. It did not work, as methane hydrates froze in the upper levels preventing the containment.".
- Cofferdam thumbnail Cofferdam_Olmsted_Locks_Ohio_River.jpg?width=300.
- Cofferdam wikiPageExternalLink nautical.html.
- Cofferdam wikiPageExternalLink cofferdam.php.
- Cofferdam wikiPageID "1301022".
- Cofferdam wikiPageLength "4707".
- Cofferdam wikiPageOutDegree "21".
- Cofferdam wikiPageRevisionID "682208602".
- Cofferdam wikiPageWikiLink Ballast_tank.
- Cofferdam wikiPageWikiLink Bulkhead_(partition).
- Cofferdam wikiPageWikiLink Caisson_(engineering).
- Cofferdam wikiPageWikiLink Category:Dams_by_type.
- Cofferdam wikiPageWikiLink Category:Naval_architecture.
- Cofferdam wikiPageWikiLink Dam.
- Cofferdam wikiPageWikiLink Deck_(ship).
- Cofferdam wikiPageWikiLink Deepwater_Horizon_oil_spill.
- Cofferdam wikiPageWikiLink Dry_dock.
- Cofferdam wikiPageWikiLink Drydock.
- Cofferdam wikiPageWikiLink Hull_(watercraft).
- Cofferdam wikiPageWikiLink Hydrate.
- Cofferdam wikiPageWikiLink Oil_platform.
- Cofferdam wikiPageWikiLink Retaining_wall.
- Cofferdam wikiPageWikiLink Sheet_pile.
- Cofferdam wikiPageWikiLink Ship.
- Cofferdam wikiPageWikiLink Timber_framing.
- Cofferdam wikiPageWikiLink Wale.
- Cofferdam wikiPageWikiLink File:Cofferdam_Olmsted_Locks_Ohio_River.jpg.
- Cofferdam wikiPageWikiLink File:Cofferdam_TT_A356.JPG.
- Cofferdam wikiPageWikiLink File:Dam_Coffer.jpg.
- Cofferdam wikiPageWikiLink File:Wreck_uss_maine.jpg.
- Cofferdam wikiPageWikiLinkText "Cofferdam".
- Cofferdam wikiPageWikiLinkText "cofferdam".
- Cofferdam wikiPageWikiLinkText "cofferdams".
- Cofferdam hasPhotoCollection Cofferdam.
- Cofferdam wikiPageUsesTemplate Template:Clear.
- Cofferdam wikiPageUsesTemplate Template:Commons_category.
- Cofferdam wikiPageUsesTemplate Template:Reflist.
- Cofferdam wikiPageUsesTemplate Template:Wiktionary-inline.
- Cofferdam subject Category:Dams_by_type.
- Cofferdam subject Category:Naval_architecture.
- Cofferdam hypernym Enclosure.
- Cofferdam type Article.
- Cofferdam type Dam.
- Cofferdam type HistoricPlace.
- Cofferdam type Article.
- Cofferdam type Dam.
- Cofferdam comment "A cofferdam (also called a coffer) is a temporary enclosure built within, or in pairs across, a body of water and constructed to allow the enclosed area to be pumped out, creating a dry work environment for the major work to proceed. Enclosed coffers are commonly used for construction and repair of oil platforms, bridge piers and other support structures built within or over water.".
- Cofferdam label "Cofferdam".
- Cofferdam sameAs Batardeau.
- Cofferdam sameAs Kofferdamm_(Wasserbau).
- Cofferdam sameAs Kofrodigo.
- Cofferdam sameAs Ataguía.
- Cofferdam sameAs Batardeau.
- Cofferdam sameAs Cófradhamba.
- Cofferdam sameAs סכר_עצירה.
- Cofferdam sameAs 囲い堰.
- Cofferdam sameAs 가물막이댐.
- Cofferdam sameAs Kistdam.
- Cofferdam sameAs Koferdam_(hydrotechnika).
- Cofferdam sameAs m.025rs_f.
- Cofferdam sameAs Батардо.
- Cofferdam sameAs Батардо.
- Cofferdam sameAs Q205077.
- Cofferdam sameAs Q205077.
- Cofferdam wasDerivedFrom Cofferdam?oldid=682208602.
- Cofferdam depiction Cofferdam_Olmsted_Locks_Ohio_River.jpg.
- Cofferdam isPrimaryTopicOf Cofferdam.