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Alcatraz Lighthouse

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Its a surprise to some when you mention Alcatraz as a lighthouse... but the lighthouse duties on the island actually predate the famous prison.

 

The Concrete and block tower was constructed in 1854, with a 3rd-Order Lens providing the light.

In the 1906 San Francisco Earthquake, the tower was heavily damaged, but was strengthened as part of its repair, and no significant additional damage has happened in earthquakes since.

The light was automated in 1963, the same year the prison closed.  The keeper's quarters were burned during the Indian takeover of the island complex in the 1970's

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