Union Pacific Railroad diesel locomotive number 3637 at Tacoma, Washington, in 1975. UP 3637 leads SP 8824 and SP 9347 leads southbound freight by UP Junction in Tacoma in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

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 3364 at Tacoma, Washington, in 1979. UP 3364 and 3233 lead freight train No. 684 by the Tacoma grain terminal in 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 3357 near East Olympia, Washington, in 1981. UP 3357, 3221 and 2022 lead a freight train between Kyro and East Olympia in 1981 Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 3354 on the waterfront at Tacoma, Washington, in 1979. UP 3354 leads a freight train at Sperry dock in Tacoma in 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 3354 on the waterfront at Tacoma, Washington, in 1979. UP 3354 leads a freight train at Sperry dock in Tacoma in 1979. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Union Pacific Railroad diesel locomotive number 3277 at Salt Lake City, Utah, in 1985. UP 3277 helps a freight near Salt Lake City in 1985. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, helper locomotive.

Union Pacific Railroad diesel locomotive number 3252 at Menlo Park, California on August 26, 1975. SP 3252 leads five other units and a freight train at Menlo Park in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

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 308 at Richland, Washington on February 20, 1976. UP 308 leads a freight train near Richland in 1976. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.