From the record
“Benson Grist Mill is a restoration-replica museum located in Tooele County, Utah in the western United States, which allows visitors to see the inner workings of a latter-nineteenth-century pioneer gristmill. It has four other historic (nineteenth-century) buildings which have been moved onto the site, as well as four ancillary structures, including an open-air pavilion.”
Wikipedia article Benson Grist Mill, CC BY-SA 4.0.
One of 29 National Register listings published here for Tooele County · listed in 1972 · category: Building · built in 1988.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service