Mule Train is a 1950 American Western film directed by John English and written by Gerald Geraghty. The film stars Gene Autry, Sheila Ryan, Robert Livingston, Frank Jaquet, Vince Barnett and Syd Saylor. It was released on February 22, 1950, by Columbia Pictures.
Prospectors have discovered a natural cement mine that yields material of astonishing durability. However, greedy contractor Sam Brady enjoys a monopoly on the transportation of crushed rock, which is being used to build a local dam. U.S. Marshal Gene Autry discovers that Brady has used this method before, and his dams always burst shortly after construction, flooding entire towns. Despite Brady's power, Autry campaigns to have the new dam constructed using cement.