steel caisson

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• Caisson (engineering) — In geotechnical engineering, a caisson is a retaining, watertight structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the… …   Wikipedia

• caisson — caissoned, adj. /kay seuhn, son/, n. 1. a structure used in underwater work, consisting of an airtight chamber, open at the bottom and containing air under sufficient pressure to exclude the water. 2. a boatlike structure used as a gate for a… …   Universalium

• dam — dam1 /dam/, n., v., dammed, damming. n. 1. a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam. v.t. 4. to furnish with a …   Universalium

• Dam — /dam, dahm/, n. (Carl Peter) Henrik /kahrl pee ter hen rik/; Dan. /kahrddl pay teuhrdd hen rddik/, 1895 1976, Danish biochemist: Nobel prize for medicine 1943. * * * I Barrier built across a stream, river, or estuary to conserve water for such… …   Universalium

• lighthouse — /luyt hows /, n., pl. lighthouses / how ziz/. 1. a tower or other structure displaying or flashing a very bright light for the guidance of ships in avoiding dangerous areas, in following certain routes, etc. 2. either of two cylindrical metal… …   Universalium

• Lighthouse — For other uses, see Lighthouse (disambiguation). Speculative drawing (c. 2006) of the Lighthouse of Alexandria, on the island of Pharos …   Wikipedia

• Rock of Ages Light — Infobox Lighthouse caption = Rock of Ages Light location = Isle Royale, Michigan coordinates =coord|47|51|59|N|89|18|52.5|W|type:landmark region:US MI|display=inline,title yearbuilt = 1908 yearlit = 1910 automated = 1978 yeardeactivated =… …   Wikipedia

• Orient Long Beach Bar Light — ( Bug Light ) Location Off Orient , in Gardiners Bay of Long Island, NY, Coordinates …   Wikipedia

• Oak Island — This article is about the Oak Island in Nova Scotia. For other uses see Oak Island (disambiguation) Oak Island Oak Island, Nova Scotia Geography Location Nova Scotia Canada …   Wikipedia

• La Pyramide Inversée — ( The Inverted Pyramid ) is a skylight constructed in an underground shopping mall in front of the Louvre Museum in France. It may be thought of as a smaller sibling of the more famous Louvre Pyramid proper, yet turned upside down: its upturned… …   Wikipedia

• Lock (water transport) — Canal lock and lock keeper s cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England …   Wikipedia