Union Pacific Railroad diesel locomotive number 3124 in helper service at Motanic, Oregon, in 1979. UP 3124 and 2509 help on the rear of UP freight train NP-SE (North Platte-Seattle). Jim is riding the dome car ahead of 2509 on its way to Seattle and Alaska. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, helper locomotive-.

Union Pacific Railroad diesel locomotive number 3435 at Motanic, Oregon, in 1986. UP 3435 and 2433 lead two other units on a freight at Motanic in 1986. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 3753 at Motanic, Oregon, in 1986. UP 3753 leads 2936 and two other locomotives on an eastbound freight at Motanic Oregon in 1986. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 962 at Hinkle, Oregon, in 1964. UP 962 with an extra passenger train at Hinkle Oregon in 1964. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train.

Union Pacific Railroad steam locomotive number 3203 in a park at Portland, Oregon, undated. UP 3203 parked in a park at Portland. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive.

Union Pacific Railroad steam locomotive number 3224 at Bonneville, Oregon on June 18, 1939. UP 3224 with a passenger special on a Bonneville Dam Trip in 1939. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

US Air Force B-52 simulator cars at Portland Union Station in 1962. Photograph by Alden Raney. Other subject classes: Car-B-52 Simulator.

US Air Force B-52 simulator cars at Portland Union Station in 1962. Photograph by Alden Raney. Other subject classes: Car-B-52 Simulator.

US Air Force B-52 simulator cars at Portland Union Station in 1962. Photograph by Alden Raney. Other subject classes: Car-B-52 Simulator.