From the record
“The former South Dakota School for the Blind campus is located on Coteau Street in Gary, South Dakota. The school served as a specialized facility for educating the state's blind children.”
Wikipedia article South Dakota School for the Blind, CC BY-SA 4.0.
One of 10 National Register listings published here for Deuel County · listed in 1988 · category: District · built in 1900.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service