SP&S 4-4-2 steam locomotive Number 603, Class C-1, on Train Number 4 at Pasco, Washington, April 30, 1945. Photo by Al Farrow.

SP&S 2-8-2 steam locomotive Number 539, Class O-3, leaving by the site of the old Northern Pacific Pasco, Washington depot, July 13, 1955. Photo by Al Farrow.

SP&S diesel locomotives Number 304 (an American Locomotive Company (ALCO) C-424), 310 (an American Locomotive Company (ALCO) C-425) and 302 (an American Locomotive Company (ALCO) C-424) along with with Northern Pacific Number 3604 (EMD SD45) on the engine tracks at Pasco, March 1969. Photo by Robert Johnston.

SP&S diesel locomotives Number 304 (an American Locomotive Company (ALCO) C-424), 310 (an American Locomotive Company (ALCO) C-425) and 302 (an American Locomotive Company (ALCO) C-424) along with with Northern Pacific Number 3604 (EMD SD45) on the engine tracks at Pasco, March 1969. Photo by Robert Johnston.

SP&S diesel locomotives Number 301 (an American Locomotive Company (ALCO) C-424), 311 and 325 (an American Locomotive Company (ALCO) C-425) and Northern Pacific 7052A (EMD F9A) in the power line-up at Pasco, Washington, March 1969. Photo by Robert Johnston.

SP&S diesel locomotive Number 61, an American Locomotive Company (ALCO) RS-2, switching tank cars near Pasco, Washington, August 5, 1953. Photo by Al Farrow.

Spokane, Portland, and Seattle Railway Steam Locomotive Number 621 formerly Great Northern Class E-14, at Pasco, Washington, 1947.

Spokane, Portland and Seattle steel coach Number 274 at Pasco, Washington on August 17, 1949. Photo by W.C. Whittaker.

Spokane, Portland and Seattle steel coach Number 274 at Pasco, Washington on August 17, 1949. Photo by W.C. Whittaker.

Spokane, Portland and Seattle combination Railway Post Office (RPO) mail and baggage car Number 31 at Pasco, Washington in June 1968.