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Alcatraz Island Lighthouse
 Alcatraz Island Lighthouse | |
 | |
| Location | Alcatraz Island, San Francisco Bay, California, United States |
|---|---|
| Coordinates | 37°49′34.5″N 122°25′19.8″W / 37.826250°N 122.422167°W |
| Tower | |
| Constructed | 1854 (first) |
| Foundation | Masonry basement |
| Construction | Reinforced concrete |
| Automated | 1963 |
| Height | 84 feet (26 m) |
| Shape | Tapered octagonal tower with balcony and lantern |
| Markings | Unpainted tower, black lantern |
| Operator | Golden Gate National Recreation Area[1][2] |
| Heritage | National Register of Historic Places contributing property  |
| Light | |
| First lit | 1909 (current) |
| Focal height | 214 feet (65 m) |
| Lens | Third order Fresnel lens (removed), DCB-24 aerobeacon (current) |
| Range | 22 nautical miles (41 km; 25 mi) |
| Characteristic | Fl W 5s. |
Alcatraz Island Lighthouse | |
| Part of | Alcatraz (ID76000209[3]) |
| Designated CP | June 23, 1976 |
Alcatraz Island Lighthouse is a lighthouse—the first one built on the U.S. West Coast—located on Alcatraz Island in California's San Francisco Bay.[4] It is located at the southern end of the island near the entrance to the prison.[5] The first light house on the island was completed in 1854, and served the bay during its time as a Citadel and military prison. It was replaced by a taller (95 feet (29 m) above mean sea level) concrete tower built in 1909 to the south of the original one which was demolished after it was damaged due to earthquake in 1906. The automation of the lighthouse with a modern beacon took place in 1963, the year Alcatraz closed as the Alcatraz Federal Penitentiary. It is the oldest light station on the island with a modern beacon and is part of the museum on the island.[4][5] Although when viewed from afar it easily looks the tallest structure on Alcatraz, it is actually shorter than the Alcatraz Water Tower, but as it lies on higher ground it looks much taller.
- ^ Rowlett, Russ. "Lighthouses of the United States: Northern California". The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved June 9, 2016.
- ^ California Historic Light Station Information & Photography United States Coast Guard. Retrieved 9 June 2016
- ^ "NPS Focus". National Register of Historic Places. National Park Service. Archived from the original on July 25, 2008. Retrieved November 14, 2011.
- ^ a b "Alcatraz Island Lighthouse". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved September 10, 2012.
- ^ a b "Alcatraz Island, CA". lighthousefriends.com. Retrieved September 10, 2012.
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