SP&S 2-8-2 steam locomotive Number 507, Class O-1, at Pasco, Washington. This locomotive was formerly Great Northern Number 3024 and was built by Baldwin Locomotive Works in January 1913.

SP&S 2-8-2 steam locomotive Number 506, Class O-1, is boarded up and in storage at Vancouver, Washington on July 2, 1949. Photo by Dick Wolfe.

SP&S 2-8-2 steam locomotive Number 506, Class O-1, next to the water tank in the yard at Portland, Oregon on June 6, 1941. This locomotive was formerly Great Northern Number 3023 and was built by Baldwin Locomotive Works in January 1913. Photo by Herbert H. Arey.

SP&S 2-8-2 steam locomotive Number 506, Class O-1, at Portland, Oregon on August 3, 1950.

SP&S 2-8-2 steam locomotive Number 505, Class O-1, at Hillyard in Spokane, Washington on September 14, 1947.

SP&S 2-8-2 steam locomotive Number 505, Class O-1, at Portland, Oregon in November 1939. This locomotive was formerly Great Northern Number 3043 and was built by Baldwin Locomotive Works in January 1939.

SP&S 2-8-2 steam locomotive Number 505, Class O-1, at Portland, Oregon on June 6, 1941. Photo by Herbert L. Arey.

SP&S 2-8-2 steam locomotive Number 505, Class O-1, near the turntable at Portland, Oregon in 1937. Photo by Herbert L. Arey.

SP&S 2-8-2 steam locomotive Number 504, Class O-1, at Vancouver, Washington in May 1933.

SP&S 2-8-2 steam locomotive Number 504, Class O-1, at Vancouver, Washington on April 1, 1939. Notice that the stack hood is in the up position.