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In 1899, the rear range light was discontinued and replaced by two front range lights. On May 20, 1899 it was renamed as the "South Channel Range" lights. [1] [2] In 1901, the Front Light was about 360 feet (110 m) southeast of the southeastern angle of Fort Moultrie, and the other light was about 190 feet (58 m) to the east of the Front light.
A lighthouse was first built on Plum Island in 1849, but was abandoned in 1858 and the light moved to nearby Pilot Island. [ 7 ] The front and rear range lights were built at the same time as the United States Life-Saving Station that was established on Plum Island in 1895-6, though the two stations would be separately administered until the US ...
The Grand Island Range Lights were lit first in 1868. [1] The original front range light was a wooden pyramid that held a sixth-order Fresnel lens. [1] The original rear range light was a sixth-order Fresnel lens in a wooden tower atop a frame keeper's house, [5] 500 feet (150 m) to the rear of the front range light.
The light station was built by the U.S. Lighthouse Board in 1879 to 1880. It is a cast-iron, skeleton tower on six concrete piers. The hexagonal base is 30 ft (9.1 m) in diameter. There is a central, cylindrical stair tower with a spiral staircase. The hexagonal watch room and lantern has a wooden structure.
The building is made of brown granite.The tower is octagonal in shape, 55 feet (17 m) in height, and provides a focal plane height of 61 feet (19 m). It contains a fourth-order Fresnel lens, which flashes white light every five seconds, and has a range of 11 nautical miles (20 km; 13 mi).
Part of the reason for the closing of the Rock Harbor Light station was the 1875 establishment of the Isle Royale Light on Menagerie Island. Shortly thereafter, a third light station was erected in the Isle Royale area -- Passage Island Light lit on July 1, 1882. [22] The light was automated in 1978, which ended 68 years of service by light ...
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