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
Kirirom 1 Hydropower Dam Chinese State Owned Enterprise, China Electric Power Technology Import & Export Corporation (CETIC), was contracted to re-build the project at a cost of US$24 million under a 30-year build-operate-transfer (BOT) agreement. The Council for Development of Cambodia approved the project on 29 December 2000 and in May 2002 the project re-commenced operation, providing electricity to Kampong Speu Province and Phnom Penh. The project is managed by Electricity du Cambodge and is linked to Phnom Penh by a 120 km long, 115kV transmission line Kirirom 1 Hydropower Dam The Kirirom 1 Dam is an embankment dam located in the Kirirom National