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,
Tabqa Dam 2017, after heavy fighting damaged the main control panel at the dam and disabled the hydroelectric power station, ISIL warned of the imminent collapse of the Tabqa Dam, during a joint US/SDF operation to capture the dam. SDF forces announced they captured the dam on 10 May 2017. The Tabqa dam is located on a spot where rocky outcrops on each side of the Euphrates Valley are less than apart. The dam is an earth-fill dam that is long, high from the riverbed ( above sea-level), wide at its base and at the top. The hydroelectric power station is located