SP&S 2-8-2 steam locomotive Number 533, Class O-3, with the fireman getting pressure up to head out on another run at Portland, Oregon in May 1947.

SP&S 2-8-2 steam locomotive Number 533, Class O-3, from the firemans side at Portland, Oregon in August 1946. Photo by Stan Styles.

SP&S 2-8-2 steam locomotive Number 532, Class O-3, with fireman posing in the window. This locomotive was formerly Northern Pacific Number 1727 and was built by Brooks Locomotive Works in April 1913.

SP&S 2-8-2 steam locomotive Number 532, Class O-3, from the firemans side at Portland, Oregon on November 20, 1947. From the Witbeck Studio Collection.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Vancouver, Washington with other out of service steam locomotives.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, out of service at Vancouver, Washington.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Vancouver, Washington on September 9, 1953. Photo by Don Roberts.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Vancouver, Washington in April 1953. Photo by Stan Styles.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Portland, Oregon. Photo by Herbert Arey.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Portland, Oregon. Photo by Herbert Arey.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Portland, Oregon. This locomotive was formerly Northern Pacific Number 1704 and was built by Brooks Locomotive Works in March 1913.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Portland, Oregon on May 30, 1937. Photo by Herbert L. Arey.

SP&S 2-8-2 steam locomotive Number 531, Class O-3, at Pasco, Washington in October 1952.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Vancouver, Washington. This locomotive was formerly Northern Pacific Number 1765 and was built by Brooks Locomotive Works in September 1917. Notice the wartime blackout hoods on the headlight and class lights.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Vancouver, Washington.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Vancouver, Washington in July 1950. By this time the locomotive has add engine number indicators installed.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, with other steam locomotives out of service at Vancouver, Washington in April 1953.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, with a freight train just east of Stevenson, Washington on July 3, 1942. Photo by W.C. Whittaker.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Portland, Oregon. Photo by Herbert Arey.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Portland, Oregon. Photo by Herbert Arey.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Portland, Oregon.

Tender for SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Portland, Oregon.

SP&S 2-8-2 steam locomotive Number 530, Class O-3, at Portland, Oregon on August 25, 1947.

SP&S 4-4-0 steam locomotive Number 53, Class L-4, at Portland, Oregon in May 1922. Former Astoria & Columbia River (A&CR) Number 6.

SP&S 4-4-0 steam locomotive Number 53, Class L-4, at Portland, Oregon on May 16, 1922. Former Astoria & Columbia River (A&CR) Number 6.

SP&S 4-4-0 steam locomotive Number 53, Class L-4, at unknown Oregon location, undated.

SP&S 2-8-2 steam locomotive Number 525, Class O-2, with enginehouse employees posing on the locomotive at Wishram, Washington. This locomotive was formerly Northern Pacific 1698 and was built by Schenectady Locomotive Works in February 1910.

SP&S 2-8-2 steam locomotive Number 525, Class O-2, with enginehouse employees posing on the locomotive at Wishram, Washington.

SP&S 2-8-2 steam locomotive Number 525, Class O-2, at Vancouver, Washington on February 7, 1932.

SP&S 2-8-2 steam locomotive Number 525, Class O-2, at Vancouver, Washington on August 11, 1937. It appears this locomotive may have been in an accident at some point as the cab is of a Great Northern design as compared to earlier photographs with a Northern Pacific one.