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 15 1976, when many of the suffixed state routes were eliminated, this route was redesignated as SD 123. South Dakota Highway 15Y (SD 15Y) was a short state highway in the northeastern part of the U.S. state of South Dakota. It was established in the early 1960s, from US 12 in Big Stone City to SD 15 southwest of Shady Beach. In 1976, it was redesignated as SD 109. South Dakota Highway 15 South Dakota Highway 15 (SD 15) is a state highway in the northeastern part of the U.S. state of South Dakota. It connects Clear Lake, Milbank, and Wilmot.