Union Pacific Railroad steam locomotive number 4004 on display at Cheyenne, Wyoming on July 29, 1986. UP 4004 rests in a park at Cheyenne Wyoming in 1986. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive.

Union Pacific Railroad steam locomotive number 4019, circa 1950. UP 4019 moves in an engine terminal. Photo by Blackie Moser, J.M. Fredrickson collection. Other Subject Classes: steam locomotive.

Union Pacific Railroad steam locomotive number 4024, circa 1950. UP 4024 parked at an engine terminal. Photo by Blackie Moser, J.M. Fredrickson collection. Other Subject Classes: steam locomotive.

Union Pacific Railroad steam locomotive number 7014 at Tacoma, Washington on September 11, 1975. UP 7014 with train no, 458 at Tacoma Union Station. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 7014 at Tacoma, Washington, undated. UP 7014 helping up diesel 1561 out of Tacoma. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, helper locomotive.

Union Pacific Railroad steam locomotive number 7861 at Reservation Tower in Tacoma, Washington on April 27, 1935. UP 7861 on train 458 at Reservation in Tacoma in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 7861 at Tacoma, Washington on February 11, 1936. UP 7861 on train 457 running from Seattle to Portland in 1936. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 7861 at Union Station in Tacoma, Washington on February 11, 1935. UP 7861 on train 457 running from Seattle to Portland after the UP started using bigger locomotives in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 7864 at Tacoma, Washington on December 05, 1935. UP 7864 at Tacoma Union Station in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 7864 at Tacoma, Washington on April 16, 1936. UP 7864 arriving Tacoma with train 457 in 1936. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.