SP&S steam locomotive with a passenger train on the temporary bridge over the White Salmon River which is still under construction, undated.

SP&S 4-6-0 steam locomotives Number 161, Class D-7, and 150, Class D-2, disembarking Army troops from passenger trains at Columbia Beach, Oregon, June 1927.

SP&S 4-6-0 steam locomotives Number 161, Class D-7, and 151, Class D-2, disembarking Army troops from passenger trains at Columbia Beach, Oregon, June 1927.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-6, and 538, Class O-3) doubleheading on a freight at the east end of the yard at Wishram, Washington, undated. Photo by the Photo-Art Commercial Studios.

SP&S 4-8-4 Steam locomotive Number 700, Class E-1, and another locomotive at the SP&S Vancouver depot, 1944. Photo by Garratt.

SP&S, Northern Pacific and Northern Pacific Terminal Company steam locomotives at Hoyt Street roundhouse facilities in Portland, Oregon on October 26, 1919, from the Oregon Historical Society Collection.

SP&S freight train with 4-8-4 meeting SP&S diesel locomotive Number 801, an EMD F3A, on westbound passenger train at Skamania, Washington, September 24, 1955. John T. Labbe Photograph.

Photo of Construction Number 1555 showing right side of St. Regis Paper Company 90 Ton, Three Truck Heisler Geared Steam Locomotive Number 92 at Mineral, Washington, undated.

St. Regis Paper Company 2-6-2T steam locomotive number 75 parked at the company's logging operations before the end of railroad operations at Mineral, Washington, circa 1948. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, logging locomotive.

St. Regis Paper Company 2-6-2T steam locomotive number 75 parked at the company's logging operations near Mineral, Washington, circa 1948. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, logging locomotive.