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 4-4-2 steam locomotive Number 605, Class C-1, departing with passenger Train Number 5 at Pasco, Washington, April 30, 1945. Notice the wartime blackout hood on the headlight.

SP&S 4-4-2 steam locomotive Number 605, Class C-1, with passenger train at the station at Camas, Washington, undated, from the Dick Parks Collection.

SP&S 4-4-2 steam locomotive Number 608, Class C-1, with passenger Train Number 4 leaving the Pasco, Washington depot, May 9, 1938. Photo by Al Farrow.

SP&S 4-6-2 steam locomotive Number 621, Class H-1, at a station stop at Goodnoe, Washington in 1927.

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 4-6-2 steam locomotive Number 625, Class H-1, with a passenger train at the Wishram, Washington depot, undated.

SP&S 4-6-2 steam locomotive Number 625, Class H-1, with a passenger train at Vancouver, Washington, July 21, 1947.

SP&S 4-6-2 steam locomotive Number 625, Class H-1, with a passenger train at Camas, Washington, undated.