Oahe Dam dam upstream is Garrison Dam, near Riverdale, North Dakota, and the next dam downstream is Big Bend Dam, near Fort Thompson, South Dakota. In September and October 1804, the Lewis and Clark Expedition passed through what is now Lake Oahe while exploring the Missouri River. Oahe Dam was authorized by the Flood Control Act of 1944, and construction by the United States Army Corps of Engineers began in 1948. The world’s first rock tunnel boring machine (TBM) was invented in 1952 by James S. Robbins for the Oahe Dam project, which marked the beginning of machines replacing human tunnelers. The
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