On September 22, 1993, an Amtrak Sunset Limited passenger train derailed on the CSX Transportation Big Bayou Canot Bridge near Mobile, Alabama, United States.

Prior to the derailment, a barge pushed by the towboat Mauvilla (owned and operated by Warrior and Gulf Navigation of Chickasaw, Alabama) made a wrong turn on the Mobile River and entered the Big Bayou Canot, a channel of water closed to commercial boat traffic[2] and crossed by a CSX Transportation rail bridge.

The towboat's pilot, Willie Odom, was not properly trained on how to read his radar and so, due to very poor visibility in heavy fog and his lack of experience, did not realize he was off course.

The collision forced the unsecured end of the bridge span approximately 3 feet (1 m) out of alignment and severely kinked the track.

This might have given the Amtrak engineers sufficient time to stop the train or at least reduce its speed in an effort to mitigate the accident's severity.

In addition to corroborating findings of the official accident report, the program revealed that the train had been delayed in New Orleans by repairs to an air conditioner unit and a toilet.