Northern Pacific steam locomotive 5115 at Spokane, Washington, on July 28, 1951. Number 5115 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5115 at Spokane, Washington, on July 28, 1951. Number 5115 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5118 at Spokane, Washington, in 1949. Number 5118 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 5118 at Spokane, Washington, on May 06, 1950. Number 5118 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific 5119, a class Z-6, leads a westbound extra freight with stock cars on the head end through downtown Spokane, Washington, in 1953. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, stock car.

Northern Pacific steam locomotive 5119 at Spokane, Washington, on May 20, 1953. Number 5119 is a class Z-6 built by Alco-Schenectady in 1937. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5140 at Spokane, Washington, on June 10, 1955. Number 5140 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 5140 at Spokane, Washington, on June 10, 1955. Number 5140 is a class Z-8 built by Alco-Schenectady in 1943. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 684 at Woodinville, Washington, in 1953. Number 684 is a class C-1 built by Rome in 1883. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 684 at Woodinville, Washington, in 1953. Number 684 is a class C-1 built by Rome in 1883. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo