The Best Bad Man (1925)

Visiting his vast properties incognito, Hugh Nichols (Tom Mix) discovers that his land agent (Cyril Chadwick) is forcing Peggy Swain (Clara Bow) and her dad (Frank Beal) off their neighboring ranch. When decent-minded Nichols demands that the agent cease harassing the farmers, the nasty villain blows up the nearby dam, flooding the valley.