| 词条 | Fort Point Light, San Francisco |
| 释义 |
| name= Fort Point Light | image_name =Fort Point Light, U.S. Highway 101, San Francisco (San Francisco County, California).jpg | caption = Fort Point Light | location = just below the Golden Gate Bridge San Francisco California United States | coordinates = {{coord|37|48|38|N|122|28|38.4|W|region:US_type:landmark|display=inline,title}} | pushpin_map = United States San Francisco#California#USA | relief = 1 | pushpin = lighthouse | pushpin_map_caption = | yearbuilt = 1855 (first) | yearlit = 1864 (current) | automated = | yeardeactivated = 1934 | foundation = brick and granite third system fortification | construction = cast iron skeletal tower | marking = white tower, black lantern | shape = nonagonal frustum skeletal tower with balcony and lantern | height = {{convert|27|ft}} | focalheight = {{convert|110|ft}} | currentlens = | lens = Fourth order Fresnel lens (1864) (removed) | range = | characteristic = Fl WR 5s. | ARLHS = USA-295 | managingagent = Fort Point National Historic Site[1][2] }}Fort Point Light is a decommissioned lighthouse built on the third tier of Fort Point, which is now directly beneath the south anchorage of the Golden Gate Bridge in San Francisco, California. The lighthouse is at the south end of the narrowest part of Golden Gate strait. It was preceded by two other lighthouses in nearby locations. The present lighthouse was in operation from 1864 until 1934.[3] StructuresThere have been three lighthouses built in the area where Fort Point stands today. The original lighthouse, built in 1853, was a Cape Cod style lighthouse with an integral tower. It was the second lighthouse to be built on the US west coast, but it stood for only three months, and was never lit. While awaiting the arrival of its lens (from Paris), it was torn down to make room for the Army fort.[4] The second lighthouse at Fort Point was a squat wooden {{convert|36|ft|m|adj=on}} tower with four sides that sloped up to a square watch room. It was built on the narrow ledge between the fort and the water. In 1855, the light behind its fourth-order Fresnel lens was lit for the first time. Erosion undermined its foundation, and in 1863 it was torn down to make way for a bigger seawall.[4] Fort Point's third lighthouse was built atop the wall of the fort in 1864. It was built as a {{convert|27|ft|m|adj=on}} iron skeleton tower with a spiral staircase. A fifth-order lens was originally fitted, but in 1902 the lens was upgraded to a fourth-order lens, which produced alternating white and red flashes. In 1933, when work on the Golden Gate Bridge began, a fog signal and navigational light were placed at the base of the bridge's south tower. On September 1, 1934, after the towers for the Golden Gate Bridge were completed, the lighthouse was deactivated. The bridge would block off much of the light from the lighthouse, and as the towers were {{convert|740|ft|m|0}} tall, they provided a more visible warning for mariners. Keepers{{Refimprove section|date=December 2017}}Early keepers of Fort Point Light included:
Assistant keepers included:
See also{{stack|{{Portal|California|Lighthouses}}}}
References1. ^[https://www.unc.edu/~rowlett/lighthouse/ca.htm Fort Point] The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved 10 June 2016 2. ^California Historic Light Station Information & Photography United States Coast Guard. Retrieved 10 June 2016 3. ^{{cite web|title=Fort Point National Historic Site| url=https://www.nps.gov/fopo/planyourvisit/upload/fopo-english-web.pdf| publisher=National Park Service| accessdate=5 December 2017}} 4. ^1 {{cite book|last1=Veronico|first1=Betty S.|title=Lighthouses of the Bay Area|date=2008|publisher=Arcadia Pub.|location=San Francisco, CA|isbn=0738559431|page=61}} External links{{commonscat|Fort Point Light (California)}}
5 : Lighthouses completed in 1853|Towers completed in 1853|Lighthouses on the National Register of Historic Places in California|Government buildings on the National Register of Historic Places in San Francisco|Lighthouses in San Francisco |
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