From the record
“The Smith Mine Historic District, in Carbon County, Montana, near Bearcreek, Montana, is a historic district which was listed on the National Register of Historic Places in 2009. The district included 27 contributing buildings and 12 contributing structures on 200 acres (81 ha).”
Wikipedia article Smith Mine Historic District, CC BY-SA 4.0.
One of 81 National Register listings published here for Carbon County · listed in 2009 · category: District · built in 1906.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

