Building Oahe Dam - Part Two

Posted by Brian Gevik on

Oahe Dam on the Missouri River near Pierre, South Dakota, is built of millions of tons of packed earth, rock, and concrete. But a dam has to do more than just hold back water. This film from the 1950s shows construction of the emergency tunnels used for floodwater release, the massive water intake tower upstream from the dam, and several other structures that really make Oahe work.

Images of the Past Building Oahe Dam - Part Two Film from the 1950s shows construction of flood tunnels, power house, and other structures

Notable in the film above are shots of the emergency gates tested for the first time in April of 1957. Fifty-four years later, during the Missouri River Flood of 2001, those tunnels and gates would be used for real. The video below shows the tunnels and other structures capably moving 150,000 cubic feet per second (CFS) of river water. 

Images of the Past Oahe Dam Floodwater Release - 2011 Emergency release of Missouri River floodwater in 2011.

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