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 State Park (Illinois) Beaver Dam State Park (Illinois) Beaver Dam State Park is an Illinois state park on in Macoupin County, Illinois in the United States. The park is southwest of Carlinville, Illinois and is managed by the Illinois Department of Natural Resources (IDNR) as a public place for fishing. The state park centers on the Beaver Dam Lake, an artificial reservoir which was created by a private Carlinville fishing club in the 1890s. The club later became a private resort which catered to visitors who arrived via the adjacent Chicago and Alton Railroad. During the Great Depression, the resort failed. The state