SP&S 4-6-6-4 steam locomotive Number 910, Class Z-8, retired at Vancouver, Washington in October 1956.

Two men posing next to SP&S 4-6-6-4 steam locomotive Number 910, Class Z-8, at Wishram, Washington. Photo by Jim Mills.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, at the depot at Kennewick, Washington. Photo by Jim Mills.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, with an extra westbound freight at Marshall, Washington on May 17, 1953. Photo by Ron Nixon.

Builders photo of SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, at American Locomotive Company (ALCO) plant at Schenectady, New York in September 1944. From the ALCO Historic Photos Collection.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, with a westbound freight out of Spokane, Washington in 1945. Photo by George C. Corey.

Front end view of SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, at the Great Northern Hillyard servicing facilities in Spokane, Washington in April 1947. Photo by Ben Griffiths.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, getting ready for another run at Spokane, Washington on August 19, 1949. Photo by W. C. Whittaker.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, at the Great Northern Hillyard servicing facilities in Spokane, Washington.

SP&S 4-6-6-4 steam locomotive Number 911, Class Z-8, taking on water at the Great Northern Hillyard servicing facilities in Spokane, Washington.