Swanee River (1931)

A power company floods a sleepy Tennessee Valley for a dam to run a hydraulic power plant. Garry, a Northern engineer on the project, falls in love with Caroline, Colonel Bradford's adopted daughter. The colonel's nephew, Jack Bradford, uses his power of attorney to sell a valuable portion of the colonel's estate to Morton, head of the power project. The colonel confronts Jack and is killed in the struggle. When Garry finds the body and Jack accuses him of the murder, he escapes, but is pursued by bloodhounds. Jack witnesses Garry retrieving the deed of sale from Morton and blows up the dam to prevent him from returning. The waters sweep Jack away and trap Caroline in a cave. Garry rescues her and the two become engaged.