From the record
“The Carson Roller Mill is a manufacturing facility in Carson, North Dakota that was built in 1913. It was listed on the National Register of Historic Places (NRHP) in 1980.”
Wikipedia article Carson Roller Mill, CC BY-SA 4.0.
One of 3 National Register listings published here for Grant County · listed in 1980 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service