Detail view under the cab on SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, in storage at Vancouver, Washington on August 18, 1956. Photo by John Labbe.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, in storage at Vancouver, Washington in October 1956.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, in storage at Vancouver, Washington in September 1956. Photo by Stan Styles.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, in storage along with two others at Vancouver, Washington on September 9, 1956. Photo by John Labbe.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, at the enginehouse at Wishram, Washington on October 9, 1951. Photo by John Labbe.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, at the east end of the enginehouse at Wishram, Washington along with some ALCO FB diesel locomotives.

SP&S 4-6-6-4 steam locomotive Number 905, Class Z-6, at the enginehouse at Wishram, Washington.

SP&S 4-6-6-4 steam locomotive Number 910, Class Z-8, on a snowy day at Lamont, Washington.

SP&S 4-6-6-4 steam locomotive Number 910, Class Z-8, at Pasco, Washington on July 29, 1953.

The crew and management pose next to SP&S 4-6-6-4 steam locomotive Number 910, Class Z-8, at Portland, Oregon on October 16, 1944. Photo by Don Roberts.