From the record
“The Upper Brownlee School is a historic school building located on Dry Buck Road near Sweet, Idaho, United States. The school was built in 1911 by the residents of Brownlee, one of the several small mining communities which had grown in the Boise River basin in the late 19th century.”
Wikipedia article Upper Brownlee School, CC BY-SA 4.0.
One of 4 National Register listings published here for Boise County · listed in 1998 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service