Northern Pacific 5105 and 5108, both class Z-6s, lead a westbound extra freight at Glendive, Montana, on September 03, 1953. It was unusual to doublehead the big Zs due to the loading of bridges. This configuration was likely to transfer power to another terminal. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 5105 at Glendive, Montana, on September 03, 1953. Number 5105 is a class Z-6 built by Alco-Schenectady in 1936. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 692 at Parkwater, Washington, on September 30, 1916. Number 692 is a class B-3 built by Grant in 1888. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 979 at Brainerd, Minnesota, on June 07, 1916. Number 979 is a class L built by Baldwin in 1883. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo