Integral lighthouse

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Point Lookout Light in Maryland PointLookoutLighthouse1.jpg
Point Lookout Light in Maryland

An integral lighthouse is a lighthouse in which the tower and keeper's dwelling are united in one structure. Generally, the term is not used to refer to a caisson or screw-pile lighthouse.

Lighthouse Structure designed to emit light to aid navigation

A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses and to serve as a navigational aid for maritime pilots at sea or on inland waterways.

A caisson lighthouse is a type of lighthouse whose superstructure rests on a concrete or metal caisson. Caisson lighthouses were developed in the late nineteenth century as a cheaper alternative to screwpile lighthouses. The Caisson design was also more efficient as it could better withstand harsh weather, and were not as fragile. Caisson lighthouses usually have living quarters made of cast iron, although some brick examples are known. The two American nicknames were later coined because of the structure's shape.

Screw-pile lighthouse lighthouse which stands on piles that are screwed into sandy or muddy sea or river bottoms

A screw-pile lighthouse is a lighthouse which stands on piles that are screwed into sandy or muddy sea or river bottoms. The first screw-pile lighthouse to begin construction was built by blind Irish engineer Alexander Mitchell. Construction began in 1838 at the mouth of the Thames and was known as the Maplin Sands lighthouse, and first lit in 1841. However, though its construction began later, the Wyre Light in Fleetwood, Lancashire, was the first to be lit.

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Robbins Reef Light lighthouse in New Jersey, United States

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