Guard Island Light

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Guard Island Light
Guard Island Light
Guard Island Light is located in Alaska
Guard Island Light
LocationGuard Island
Tongass Narrows entrance
Clarence Strait
United States
Coordinates55°26′46″N 131°52′52″W / 55.445990°N 131.881165°W / 55.445990; -131.881165Coordinates: 55°26′46″N 131°52′52″W / 55.445990°N 131.881165°W / 55.445990; -131.881165
Year first constructed1904 (first)
Year first lit1924 (current)
ConstructionReinforced concrete
Tower shapeSquare tower with balcony and lantern on oil house
Markings / patternWhite tower, black lantern
Tower height30 feet (9.1 m)
Focal height74 feet (23 m)
Original lensFourth Order Fresnel lens
Range17 nautical miles (31 km; 20 mi)
CharacteristicFl W 10s.
emergency light (Fl W 6s.) of reduced intensity when main light is extinguished.
Admiralty numberG6046
ARLHS numberALK-008
USCG number6-22300
Managing agentUnited States Coast Guard[1] [2]
Heritageplace listed on the National Register of Historic Places Edit this on Wikidata
Guard Island Lighthouse
Alaska Heritage Resources Survey
Nearest cityKetchikan, Alaska
Area10.4 acres (4.2 ha)
ArchitectJ.T. Elliot
Architectural styleModerne
MPSLight Stations of the United States MPS
NRHP reference #03001378[3]
AHRS #KET-00025
Added to NRHPJanuary 14, 2004

The Guard Island Light is a lighthouse on a small island near the entrance to the Tongass Narrows, in Clarence Strait in southeastern Alaska. The western entrance to the Behm Canal also lies nearby.


Aerial view

The lighthouse location was prioritized sixth in a 1901 study of 15 Alaska proposed sites. It would assist shipping along Southeast Alaska's Inside Passage, at the north end of the Tongass Narrows, "one of the more difficult passages along the route" of Klondike Gold Rush-related shipping to Juneau and to Skagway.[4]

Original 1904 lighthouse – USCG archive photo

Construction of the Guard Island Lighthouse began in the summer of 1903 and was completed by September 1904. The 34-foot (10 m) wooden tower housed a fourth order Fresnel lens that produced a fixed white light. However, the wood used for Guard Island Light Station, as well as for several other Alaskan lighthouses, soon deteriorated in the harsh weather conditions. By the 1920s, all the lighthouses except Eldred Rock were falling apart, and in 1922, Congress authorized the reconstruction of Guard Island Light. In 1924, the dilapidated light tower was replaced with a new single-story rectangular tower of reinforced concrete. The station was automated by the Coast Guard in 1969.

The lighthouse was listed as a historic district on the National Register of Historic Places in 2004. The listing includes one contributing building, one contributing structure, and one contributing site on a 10.4-acre (4.2 ha) area.[3]

See also[edit]


  1. ^ Guard Island The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved 7 June 2016
  2. ^ Alaska Historic Light Station Information & Photography United States Coast Guard. Retrieved 7 June 2016
  3. ^ a b "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.
  4. ^ Robert M. Weaver (June 16, 2003). "National Register of Historic Places Registration: Guard Island Lighthouse / Guard Island Light Station (AHRS Site No. KET-025)". National Park Service. and accompanying photos (historic and from 2002)

External links[edit]