Lake of the Ozarks / Osage Region
Truman Dam controls the flow into Lake of the Ozarks
Truman Dam, near Warsaw, impounds the Osage River to form Truman Lake and sits upstream of Lake of the Ozarks. Because the Osage flows from Truman down into Lake of the Ozarks, releases from Truman Dam feed the lake below it, so the two reservoirs are part of one connected river system rather than two unrelated lakes. The dam is a U.S. Army Corps of Engineers project managed by the Kansas City District, which operates it for purposes that typically include flood control, hydropower, and recreation. For Benton County residents that connection matters in practical ways: lake levels, flows, and recreation on both bodies of water are shaped by how the dam is operated. Confirm the dam’s specific authorized purposes and operations with the Corps before stating them as fact.
Where to see it
- MDC Osage River West Watershed
Use MDC for watershed context around the Osage River system.
- Corps Water Management: Harry S. Truman Lake
Use the Corps page for current lake and release data.
References
More from Benton County: browse every local note for the county.
Last checked against the sources above: June 15, 2026.