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White Shoal Light, Michigan

White Shoal Light
White Shoal Light winter.jpg
LocationLake Michigan west of the Straits of Mackinac, Emmet County, Michigan
Coordinates45°50′32″N 85°8′7″W / 45.84222°N 85.13528°W / 45.84222; -85.13528Coordinates: 45°50′32″N 85°8′7″W / 45.84222°N 85.13528°W / 45.84222; -85.13528
First lit1910
Automated1976
Foundationcofferdam/timber exposed Crib pier/concrete pier.
ConstructionTerra Cotta//steel/brick interior;[1] gunnite exterior; aluminium lantern
Tower shapeOctagonal base on building; frustum of a cone.[2][3]
Markings / patternWhite orig./Red and White barber pole tower, red lantern & base
Tower height121 feet (37 m)[4]
Focal height125 feet (38 m)[5]
Original lens2nd order bivalve Fresnel Lens[6]
Current lens7.5-inch (190 mm) Tideland Signal acrylic lens
Intensity1.2 million candle power
Range17 nautical miles (31 km; 20 mi)
Characteristicflashing 5 sec
Fog signalDiaphone originally,[7] HORN 1 blast every 30", 3" blast. Operates year round.
Racon"K" (– • –).[8]
ARLHS numberUSA-886[9][10]
USCG number7-17750[8]
Heritageplace listed on the National Register of Historic Places Edit this on Wikidata
White Shoal Light Station
Nearest cityMackinaw City, Michigan
Area0.1 acres (0.040 ha)
ArchitectJudson, Major William V.
MPSU.S. Coast Guard Lighthouses and Light Stations on the Great Lakes TR
NRHP reference No.84001391[11]
Added to NRHPJuly 19, 1984
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The White Shoal Light is a lighthouse located 20 miles (32 km) west of the Mackinac Bridge in Lake Michigan. It is an active aid to navigation.[8] It is also the tallest lighthouse on the Great Lakes.

  1. ^ "Historic Light Station Information and Photography: Michigan". United States Coast Guard Historian's Office. Archived from the original on 2017-05-01.
  2. ^ Wobser, David, Boatnerd.com, White Shoal Light. Archived July 11, 2011, at the Wayback Machine
  3. ^ Pepper, Terry. "Database of Lighthouse Types and Tower Shapesl Heights". Seeing the Light. terrypepper.com. Archived from the original on 2009-11-15.
  4. ^ Pepper, Terry. "Database of Tower Heights". Seeing the Light. terrypepper.com. Archived from the original on 2000-09-18.
  5. ^ Pepper, Terry. "Database of Focal Heights". Seeing the Light. terrypepper.com. Archived from the original on 2008-08-30.
  6. ^ Pepper, Terry. "Database of Original Lenses". Seeing the Light. terrypepper.com. Archived from the original on 2000-09-18.
  7. ^ National Park Service Maritime History Project, Inventory of Historic Light Stations, White Shoal Light.
  8. ^ a b c Light List, Volume VII, Great Lakes (PDF). Light List. United States Coast Guard. p. {{{page}}}.
  9. ^ "White Shoal (Lake Michigan) Light". arlhs.com. Retrieved 20 May 2015.
  10. ^ "Lighthouses in the World List of Lights beginning with W". arlhs.com. Retrieved 20 May 2015.
  11. ^ "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.