South Dakota State Historical Society South Dakota State Historical Society The South Dakota State Historical Society is South Dakota's official state historical society and is located in Pierre, South Dakota at 900 Governors Drive. It is a part of the Department of Education The South Dakota State Historical Society was founded in 1862 as the Old Settlers Association of Dakota Territory. In 1901, the South Dakota Legislature established the Association as the official state historical society. In 1975, the State Archives were incorporated into the Society, which continues to operate them and also functions as a public library. In 1989 the Culture Heritage Center was
South Dakota Highway 25 of former SD 35. This was redesignated as part of SD 25 in 1976. South Dakota Highway 25 South Dakota Highway 25 (SD 25) is a state highway in the eastern part of the U.S. state of South Dakota. It connects Scotland, Howard, De Smet, and Webster. It consists of two disconnected segments. Its shorter southern segment extends from SD 50 northwest of Tabor to U.S. Route 18 (US 18) west of Olivet. Its much-longer northern segment extends from SD 262 northwest of Emery, through Howard, De Smet, and Webster, to the North Dakota state line. Here, the roadway continues