Construction of the Hartington City Auditorium began in the spring of 1922 and was completed in 1923. The building was designed by Sioux City architect, William Steele, who formerly worked for Louis H. Sullivan, a prominent member of the Chicago School of Architecture. Listed on the
Gavin's Point Dam, part of the 1944 Pick-Sloan Plan, plays an important role in the successful operation of the six main stem dams and reservoirs on the Upper Missouri River Basin. The dam was completed in 1957 at a cost of $51 million.