From the record
“The Ingomar Public School, also known as Ingomar High School, on Second Avenue in Ingomar, Montana, was built in 1913. It was listed on the National Register of Historic Places in 1994.”
Wikipedia article Ingomar Public School, CC BY-SA 4.0.
One of 22 National Register listings published here for Rosebud County · listed in 1994 · category: Building · built in 1913.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
