Bagnell Dam Turbine, 12 July 2014 This cast steel, 50-ton turbine sitting on the shore on the Osage River side of the Bagnell Dam at the Lake of the Ozarks is one of the originals. It was placed in service in 1931, after 20 months of 24-hour-a-day construction to build the dam, and stayed in use for 70 years.…