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.

SP&S 4-6-2 steam locomotive Number 626, Class H-1, with SP&S passenger Train Number 5 at the Pasco, Washington depot, along with Northern Pacific diesel locomotive Number 6503, an EMD F3A, with Northern Pacific passenger Train Number 5 on July 8, 1947. From the Phillip C. Johnson Collection.

SP&S 4-8-4 steam locomotive Number 700, Class E-1, with Train Number 4 on the Fort Wright trestle, July 21, 1950. Photo by Phillip C. Johnson.

SP&S 4-8-4 steam locomotive Number 700, Class E-1, at Wishram, Washington with the 'Farewell to Steam' passenger train on May 20, 1956. Photo by Frank Seufert.

SP&S 4-8-4 steam locomotive Number 700, Class E-1, at Wishram, Washington with the 'Farewell to Steam' passenger train on May 20, 1956. Photo by Frank Seufert.