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,
Grishk Dam operation in their attempt to blow up the dam. Grishk Dam The Grishk Dam is a dam and power plant on the Helmand River, located in Helmand Province, Afghanistan. It was built by the United States in 1945 for the Helmand Valley Authority for hydroelectric power. The dam is an example of one of the 20th century projects to modernize Afghanistan. A 2003 technical journal noted that the Grishk power plant was commissioned on an irrigation canal in 1945, and had two damaged and obsolete 1.2 megawatt units which would cost US$3 million to repair. In 2005, a group of