SP&S 4-4-2 steam locomotive Number 603, Class C-1, with a passenger train in Union Station, 1939. Photo by Herbert L. Arey.

SP&S 4-6-2 steam locomotive Number 621, Class H-1, arriving with passenger train Number One at Portland, May 7, 1939. Photo by Emery J. Roberts.

SP&S 4-6-2 steam locomotive Number 624, Class H-1, with a passenger train in Union Station; oiling around on Train Number 4, August 24, 1947.

SP&S 4-8-4 steam locomotive Number 701, Class E-1, with train Number 3 arriving at Portland Union Station, July 8, 1947.

SP&S 4-6-2 steam locomotive Number 621, Class H-1, with the Portland roundhouse workforce after locomotive was rebuilt from SP&S 4-6-0 Number 107, December 2, 1927.

SP&S 4-6-0 steam locomotives Number 107, Class D-1, with other power by the Portland turntable, undated.

SP&S 4-6-0 steam locomotives; Number 157, Class D-3, with other steam power at Portland, undated.

SP&S 4-6-0 steam locomotive Number 160 (Class D-7), and 2-8-0's Number 301 (Class N-4), 305 (Class N-4), 336 (Class N-7) and other power on roundhouse tracks, 1932. Photo by H. Arey.

SP&S 4-4-2 steam locomotive Number 602, Class C-1, with Northern Pacific Number 79 and Great Northern Numbers 1624 and 1010 by the turntable, 1924. Photo by R. Hart.

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.