Walla Walla Valley Railway diesel locomotive 775 at Auburn, Washington in 1950. Walla Walla Valley 775, formerly Northern Pacific number 126 class SW660, built by Alco, 1940. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, roster shot

Walla Walla Valley Railway diesel locomotive 775 at Auburn, Washington on August 19, 1953. Walla Walla Valley 775, formerly Northern Pacific number 126 class SW 660, built by Alco, 1940. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, roster shot

Walla Walla Valley Railway Electro-Motive Division (EMD) SW-1 diesel locomotive number 104 (built in 1939 as Fort Worth & Denver 602) switches a box car in Milton Freewater, Oregon, on October 16, 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

Walla Walla Valley Railway Electro-Motive Division (EMD) SW-1 diesel locomotive number 104 (built in 1939 as Fort Worth & Denver 602) switches a box car in Milton Freewater, Oregon, on October 16, 1980. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

Walla Walla Valley Railway Alco SW-660 diesel locomotive number 775 (construction number 69237, built in 1940 as Northern Pacific 126) awaiting scrapping at Simon & Sons reclamation yard in Tacoma, Washington, circa 1970. Photo by Al Harris, J.M. Fredrickson Collection. Other Subject Classes: diesel locomotive, switching locomotive.

Walla Walla Valley Railway Alco SW-660 diesel locomotive number 775 (construction number 69237, built in 1940 as Northern Pacific 126) awaiting scrapping at Simon & Sons reclamation yard in Tacoma, Washington, circa 1970. Photo by Al Harris, J.M. Fredrickson Collection. Other Subject Classes: diesel locomotive, switching locomotive.

Washington Central Railroad Electro-Motive Division (EMD) SW1200 diesel locomotive number 212 (construction number 29788, built in 1965) switches cars at Yakima, Washington, in August 1987. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switching locomotive.

Washington Central Railroad Electro-Motive Division (EMD) GP9 diesel locomotive number 301 (construction number 22737, built in 1957 as Northern Pacific 334) leads a train east of Thrall, Washington, in August 1987. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Washington Central Railroad Electro-Motive Division (EMD) GP9 diesel locomotive number 301 (construction number 22737, built in 1957 as Northern Pacific 334) pushes a cut of cars by the newly-renovated Yakima Depot at Yakima, Washington, in August 1987. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, station.

Washington Central Railroad Electro-Motive Division (EMD) GP9 diesel locomotive number 301 (construction number 22737, built in 1957 as Northern Pacific 334) makes up its train at Yakima, Washington, in August 1987. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, covered hopper car.