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
Conant Brook Dam Conant Brook Dam The Conant Brook Dam is located on Conant Brook in Monson, Massachusetts, about upstream from the confluence of Conant Brook and the Quaboag River. It is approximately east of Springfield, Massachusetts. Designed and constructed by the United States Army Corps of Engineers, this dam substantially reduces flooding along the Quaboag, Chicopee, and Connecticut rivers. Construction of the project began in 1964 with completion in 1966 at a cost of US$2,950,530. The Conant Brook Dam is located within the Chicopee River watershed and is part of the Connecticut River basin. Access to the site is available from State