Mile Rocks Lighthouse
Lighthouse in California, United States / From Wikipedia, the free encyclopedia
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Mile Rocks Lighthouse is located on a rock about 1 mile (1.6 km) southwest of the Golden Gate Bridge, off of Lands End in San Francisco, California. It was completed in 1906, replacing a nearby bell buoy. In 1966, the light was automated, and the original 85 m (279 ft) tower of the lighthouse was demolished and replaced by a helipad. The lighthouse was at one time painted with alternating red and white rings, but as of 2017[update], the lighthouse is painted plain white.
Quick Facts Location, Coordinates ...
Location | offshore Lands End San Francisco California United States |
---|---|
Coordinates | 37°47′34″N 122°30′37″W |
Tower | |
Constructed | 1906 (first) |
Foundation | massive reinforced concrete enclosed with steel plates basement |
Construction | steel tower |
Automated | 1966 |
Shape | cylindrical tower with aerobeacon and helipad on the top (current) 3-stage cylindrical tower with balcony and lantern (first) |
Markings | white and red horizontal bands tower (current) white tower |
Power source | solar power |
Operator | United States Coast Guard[1] [3] |
Fog signal | blast every 30s. continuously |
Light | |
First lit | 1966 (current rebuilt) |
Focal height | 49 feet (15 m) |
Lens | 3rd order Fresnel lens (original), aerobeacon (current) |
Range | 15 nmi (28 km; 17 mi) |
Characteristic | Fl W 5s. |
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