Derby Wharf Light

Derby Wharf Light Station is a historic lighthouse on Derby Wharf in Salem, Massachusetts that is within the Salem Maritime National Historic Site.

Derby Wharf Light
US Coast Guard photo
LocationSalem, Massachusetts
Coordinates42°30′59.6″N 70°53′0.9″W
Year first constructed1871
Year first lit1871
Automated1970s
Deactivated1977–1983
ConstructionBrick
Tower shapeSquare
Markings / patternWhite Black
Tower height4 metre 
Focal height25 feet (7.6 m)
Original lens5th order Fresnel lens 1871-1906
4th order 1906-1910
6th order 1910-1970s
Current lensSolar-powered optic
Range4 nautical miles (7.4 km; 4.6 mi)
CharacteristicFl R 6sec
Fog signalnone
Admiralty numberJ0296
ARLHS numberUSA-224
USCG number1-10129[1][2]
Heritageplace listed on the National Register of Historic Places 
Derby Wharf Light Station
MPSLighthouses of Massachusetts TR
NRHP reference No.87001466[3]
Added to NRHPJune 15, 1987

It was built in 1871 and added to the National Register of Historic Places in 1987.[2][3] The United States Coast Guard Light List[1] description is "White square tower. Maintained by the U.S. Park Service". The actual light is 25 feet (7.6 m) above Mean High Water. Its red light is visible for 4 nautical miles (7.4 km; 4.6 mi).

History

The Light Station was originally built in 1871 and used an oil lamp shining through a Fresnel lens. For many years, Derby Wharf Light had one of only 17 sixth-order Fresnel lenses in the United States. Today, the light is solar powered, and the light is a red flash every six seconds.

See also

References
  1. Light List, Volume I, Atlantic Coast, St. Croix River, Maine to Shrewsbury River, New Jersey (PDF). Light List. United States Coast Guard. 2010. p. 83.
  2. "Historic Light Station Information and Photography: Massachusetts". United States Coast Guard Historian's Office. Archived from the original on 2017-05-01.
  3. "National Register Information System". National Register of Historic Places. National Park Service. April 15, 2008.


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