The conductor and a brakeman were releasing the brakes and uncoupling loaded coal cars one at a time to allow them to roll down a descending grade for unloading. The accident happened when the conductor fouled the track and went between the coal cars to apply the hand brake on the rear coal car, and the brakeman released the hand brake on the coal car in front. As the coal car in front rolled downhill, the coal car in the rear unexpectedly rolled and struck the conductor. The coal car ran over his lower-right leg and lower-right arm, amputating both extremities.

The NTSB is an independent federal agency which determines the probable causes of civil aviation, railroad, transit, highway, marine, pipeline, and commercial space accidents.