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.

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.

Standard Steel Works Company saddle-tank steam locomotive number 10 on display at Connecticut Valley Railroad in Essex, Connecticut on January 28, 1977. Number 10 was built by Baldwin in 1934. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Steam Locomotive 15, undated. Photograph by Wade Stevenson.

Steam Locomotive 801, undated. Photograph by Wade Stevenson.