The Missouri River 9


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Oahe Dam, Lake Sharpe, near Pierre SD   ·   © Joe Riis

Note by Joe Riis: This photograph of Oahe Dam looks downstream with Lake Sharpe on the left and Lake Oahe on the right. The water in-tanks are above the dam and the powerhouse is below the dam. Over a mile wide, the Oahe dam is one of the biggest earthen dams in the world. There is more shoreline on Lake Oahe than along the US Pacific Coast. The dam was built for flood control, power generation, and barge navigation; although none of it really happened. The 6 large main-stem dams on the Missouri River are running out of their usefulness and are outdated.