I thought the dam was built privately by an electric company long before Truman.
Yes, it was. Truman was built many decades after the Lake of the Ozarks was built.
In the flood of ‘93, it is said that had it not been for Truman, the Bagnell Dam would have been over topped, leading to a major disaster.
The Osage River flows through Truman, then through our lake.
BTW: Bagnell is pumping out 80,360 CFM. The lake is at 662.55.