Purchase Print The historic Caleb Crosby Threshing Barn, located in Norris, Tennessee. The barn, built in the 1830’s, contained a threshing machine powered by oxen, that was used to seperate wheat, oats or barley seeds from the main stalk of each plant. The barn, which stood next to the Holston River for 100 years, was donated to the National Park Service, by the Crosby family during the construction of the Cherokee Dam.