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Keokuk Hydro-Power System

Keokuk, Iowa
Completed 1913

Claim to Fame: At the time, the Keokuk Dam & Power Plant project incorporated the longest monolithic concrete dam in the world and was a pioneering effort in large-scale, low-head hydroelectric power.

Keokuk Dam and Power Plant Project
Courtesy Flickr/Michael Allen



This was the largest privately-funded construction project in the world when completed, and one of only two North American sites to generate 25-cycle power at the time.