Mile Rocks Lighthouse
Mile Rocks Lighthouse with helicopter landing on the top | |
| Location | offshore Lands End San Francisco California United States |
|---|---|
| Coordinates | 37°47′34″N 122°30′37″W / 37.79278°N 122.51028°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 |
| 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. |
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, the lighthouse is painted plain white.