Garrison Dam Tribes. Construction on the $300-million dam project began in 1947, and its embankment was enclosed in April 1953. The dam was dedicated by President Eisenhower two months later. The Corps of Engineers completed earthwork in the fall of 1954. Garrison Dam is one of six Missouri River Main stem dams operated by the U.S. Army Corps of Engineers, Omaha District. The dam upstream of Garrison Dam is Fort Peck Dam (near Fort Peck, Montana). The dams downstream of Garrison Dam are: Oahe Dam (near Pierre, South Dakota), Big Bend Dam (near Fort Thompson, South Dakota), Fort Randall Dam (near Pickstown,
Beaver Dam, Arizona Beaver Dam, Arizona Beaver Dam is an unincorporated community in Mohave County located in the extreme northwestern corner of the U.S. state of Arizona, settled in 1863. It is located along Interstate 15 approximately 10 miles northeast of Mesquite, Nevada. Beaver Dam is located in the 86432 zip code, which had a population of 3,933 as of the 2010 census. The site of Beaver Dam was located along the pack horse route of the Old Spanish Trail from 1828 and the later wagon route of the Mormon Road between Salt Lake City and Los Angeles from 1847. Beaver Dam Creek