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 to Arizona State Route 389 (which is paved) — and even at that, is connected only to the rest of the "Arizona Strip" (that part of Arizona separated from the rest of the state by the Grand Canyon), not to Arizona at large. The Virgin River Gorge is located just to the east of Beaver Dam. The Post Office is located in Beaver Dam on McKnight Boulevard. Fire Station No. 1 is located in Beaver Dam (No. 2 is located in Desert Springs, and No. 3 is located in Scenic). Beaver Dam has a large population of "snowbirds" (retirees from