čtvrtek 1. března 2018

USA - Mackinac Lighthouse

Mackinaw Point marks the junction of Lake Michigan and Lake Huron. Founded in 1889, the Old Mackinac Point Light Station was in operation from 1890 until 1957
Year first constructed1892
Year first lit1892
Deactivated1957
FoundationAshlar limestone
ConstructionCream City brick
Tower shapeCylindrical "castle" with attached dwelling
Markings / patternNatural with black lantern
Height50 feet (15 m)
Focal height62 feet (19 m)
Original lensFourth order Fresnel lens
Range14 nautical miles; 26 kilometres (16 mi)[5]
The buildings of the St Helena Light complex are the sole surviving structures on St. Helena Island, in Mackinac County in the U.S. state of Michigan. The lighthouse on the St. Helena Island's southeastern point was built in 1872-1873 and went into operation in September 1873. It became one of a series of lighthouses that guided vessels through the Straits of Mackinac, past a dangerous shoal that extends from the island
Year first constructed1873
Year first lit1873
Automated1922
Foundationlimestone
Constructionbrick
Tower shapefrustum of a cone with attached cottage
Markings / patternwhite w/white lantern
HeightTower - 63 feet (19 m)
Focal heightFocal plane - 71 feet (22 m)
Original lens3​12-order Fresnel lens
Current lens12-inch (300 mm) ML-300 Tideland Signal acrylic[5]
Range6 nautical miles (11 km; 6.9 mi)[6]
Round Island Passage Light (1948, automated in 1973 ) near Mackinac Island. 
Also known as Mackinac Island light. Round Island Passage light and Round Island light 
are only about 600 meters apart.

Round Island Light (1895, automated in 1924, deactivated from 1947-1996). Now part of the National Forest on tiny, uninhabited Round Island, the building was restored in 1978 for the filming of the movie "Somewhere in Time."Some of these photos were taken during a lighthouse tour during the North American Light House Festival held in Mackinaw City, Michigan. The tours were so popular the Shepler's Mackinac Island Ferry now offers several tours on scattered days through the summer and other photos were taken during those tours.


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