Franklin gasoline-driven air compressors manufactured by Chicago Pneumatic Tool Company. In 1932 the gasoline engines were replaced with diesel engines. The steam sirens were replaced with a Type F-2-T diaphone (be-you) type signal in 1936. The station and the fog signal were electrified four years later, but discontinued in 1961. The light was retired in 1969 by the U. S. Coast Guard. The lighthouse is now part of the Split Rock Lighthouse State Park and is operated by the Minnesota Historical Society. The site includes the original tower and lens, the fog signal building, the oil house, and the three keepers' houses. It is restored to appear as it did in the late 1920s. The site was added to the National Register of Historic Places in 1969. Notwithstanding its retirement, every November 10 the lighthouse emits a light in memory of the SS Edmund Fitzgerald which sank on that date in 1975. On June 30, 2011, the lighthouse was designated as a National Historic Landmark. The lighthouse keeper, Lee Radzak, worked at the lighthouse from 1982-2019, the longest tenure of any lighthouse keeper at the site. In art The United States Postal Service issued a stamp that featured the light on June 17, 1995. It was one of five lighthouses chosen for the "Lighthouses of the Great Lakes" series postage stamp designed by Howard Koslow in 1995. There was one lighthouse chosen on each of the Great Lakes. The five lighthouses are Split Rock Light on Lake Superior, St Joseph Light on Lake Michigan, Spectacle Reef Light on Lake Huron, Marblehead Light (Ohio) on Lake Erie and Thirty Mile Point Light on Lake Ontario. Because of its picturesque form and location, it has been the subject of many photographs and postcards. The lighthouse was also in the 2013 film The Great Gatsby. Gallery Records Original, microfilmed, and photocopied records of the lighthouse keepers, containing daily entries on station activities and upkeep; expenditures; weather; shipping conditions; visitors; and social events on Lake Superior's north shore during the shipping season are available for research use at the Minnesota Historical Society. See also List of National Historic Landmarks in Minnesota National Register of Historic Places listings in Lake County, Minnesota References External links Minnesota Historical Society: Split Rock Lighthouse Split Rock Lighthouse Weblog - Official Blog Historic American Engineering Record (HAER) documentation, filed under Off Highway 61, 38 miles northeast of Duluth, Two