From the record
“The Superior School in Superior in Mineral County, Montana was built in 1915-16. It was listed on the National Register of Historic Places in 1997.”
Wikipedia article Superior School (Superior, Montana), CC BY-SA 4.0.
One of 19 National Register listings published here for Mineral County · listed in 1997 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article