White Shoal Light, Michigan

White Shoal Light
Location	Lake Michigan west of the Straits of Mackinac, Emmet County, Michigan
Coordinates	45°50′32″N 85°8′7″W / 45.84222°N 85.13528°W
Tower
Foundation	cofferdam/timber exposed Crib pier/concrete pier.
Construction	Terra Cotta//steel/brick interior; gunnite exterior; aluminium lantern
Automated	1976
Height	121 feet (37 m)
Shape	Octagonal base on building; frustum of a cone.
Markings	White orig./Red and White barber pole tower, red lantern & base
Heritage	National Register of Historic Places listed place
Fog signal	Diaphone originally, HORN 1 blast every 30", 3" blast. Operates year round.
Racon	"K" (– • –).
Light
First lit	1910
Focal height	125 feet (38 m)
Lens	2nd order bivalve Fresnel Lens (original), 7.5-inch (190 mm) Tideland Signal acrylic lens (current)
Intensity	1.2 million candle power
Range	17 nautical miles (31 km; 20 mi)
Characteristic	flashing 5 sec
	White Shoal Light Station
	U.S. National Register of Historic Places
Nearest city	Mackinaw City, Michigan
Area	0.1 acres (0.040 ha)
Architect	Judson, Major William V.
MPS	U.S. Coast Guard Lighthouses and Light Stations on the Great Lakes TR
NRHP reference No.	84001391
Added to NRHP	July 19, 1984

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. It is also the tallest lighthouse on the Great Lakes.