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,
Lake Oahe a National Historic Landmark. Species of fish in the reservoir include walleye, northern pike, channel catfish, and smallmouth bass. Chinook salmon, native to the Pacific Northwest, are artificially maintained in Lake Oahe and are a popular target for anglers. The lake also supports populations of the endangered pallid sturgeon. There are 50 public recreation areas that allow access to Lake Oahe. Many of these areas offer boat ramp facilities, marinas, campgrounds, picnic areas, hiking trails, along with access for hunting and fishing opportunities. Some of the recreation areas include: Both the Cheyenne River Indian Reservation and the Standing Rock Indian