Union Pacific Railroad steam locomotive number 3975 at Tacoma, Washington, in 1947. UP 3975 a Tacoma Union Station in 1947. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive.

Union Pacific Railroad steam locomotive number 3225 at Tacoma, Washington on December 12, 1935. UP 3225 with a passenger train at Tacoma in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 3225 at Tacoma, Washington on December 13, 1935. UP 3225 with a passenger train at Tacoma in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

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.

Union Pacific Railroad steam locomotive number 3223 at Union Station in Tacoma, Washington on November 12, 1935. UP 3223 with passenger train at Tacoma in 1935. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger train.

Union Pacific Railroad steam locomotive number 3203 at Tacoma, Washington on February 15, 1936. UP 3203 with passenger train at Tacoma in 1936. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam 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 3181 at Tacoma, Washington on December 13, 1935. UP 3181 With a passenger train at Tacoma 1935. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger train.

Unidentified three-truck Shay steam locomotive, circa 1945, likely in western Washington. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, geared locomotive, logging locomotive.