From the record
“The Laurens Polygonal Hog House is a historic farm outbuilding in Dewey County, South Dakota. It is located northeast of Eagle Butte, on the east side of South Dakota Highway 63, about 1 mile (1.6 km) north of its junction with United States Route 212.”
Wikipedia article Laurens Polygonal Hog House, CC BY-SA 4.0.
One of 5 National Register listings published here for Dewey County · listed in 1995 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service