A 4-unit MRL mid-train helper set assists an 18,917 ton coal train, the heaviest ever to traverse Mullan Pass, out of Helena. The fourth unit, 4300, is not working and more power will be added at ... (more)

Trouble on Mullan Pass. With sister 4300 not loading properly, 4309 and another MRL ACe are cut into the middle of the heaviest train to ever cross Mullan. The head-end and other mid-train helpers... (more)

The heaviest train to ever cross Mullan Pass climbs up the stiff 2.2% grade.

The heaviest train to ever cross Mullan Pass is stopped on the hill as the helper crew tries to get SD70ACe 4300 to load. After several failed attempts, the train moves up to Austin where it will ... (more)

The heaviest train to ever cross Mullan Pass, begins the long slow pull out of Helena. Helping the 133 car 18,917 ton train are four head-end units, four manned mid-train helpers, and two DPU rear... (more)