SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S diesel locomotive Number 303, an American Locomotive Company (ALCO) C-424, leads a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S an American Locomotive Company (ALCO) 'Century Series' diesel locomotives with a freight train on the Fort Wright trestle, undated. Photo by Robert Johnston.

SP&S EMD F7A diesel locomotive Number 803 in a multiple unit lashup at Spokane, Washington in September 1956. Photo by Stan Styles.

SP&S EMD F3A diesel locomotive Number 800 at the Great Northern roundhouse at Hillyard near Spokane, Washington in August 1953. Photo by Stan Styles.

SP&S ALCO RS-2 diesel locomotive Number 62 in a multiple lashup at Spokane, Washington. Photo by Stan Styles.

SP&S ALCO C-425 diesel locomotives Number 313, 310 and 311 on a westbound freight at Spokane, Washington.

Spokane, Portland & Seattle Railway diesel locomotive number 54 at Spokane, Washington, on February 19, 1976. SP&S 54, an Alco RS3, parked at the engine terminal in Spokane in 1976. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, locomotive facility.

Spokane, Portland, and Seattle Railway 862 and 868, American Locomotive Company (ALCO) Type Type FA2's at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 862 and 868, American Locomotive Company (ALCO) Type Type FA2's at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 862 and 868, American Locomotive Company (ALCO) Type Type FA2's at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 862 and 868, American Locomotive Company (ALCO) Type Type FA2's at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 862, an American Locomotive Company (ALCO) Type Type FA2 at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 806 and 803, Electro-Motive Division Type FP7A's at Spokane, Washington, April 13, 1968.

Spokane, Portland, and Seattle Railway 801, an Electro-Motive Division Type FP3A at Spokane, Washington, April 12, 1968.

Spokane, Portland, and Seattle Railway 750 (Burlington Northern when photographed), an Electro-Motive Division E7 at Spokane, Washington, March 27, 1970.

Spokane, Portland, and Seattle Railway 750 (Burlington Northern when photographed), an Electro-Motive Division E7 at Spokane, Washington, March 27, 1970.

Spokane, Portland, and Seattle Railway 750 (Burlington Northern when photographed), an Electro-Motive Division E7 at Spokane, Washington, March 27, 1970.

Spokane, Portland, and Seattle Railway 313, an American Locomotive Company (ALCO) Type C425 at Spokane, Washington, April 13, 1968.

Spokane, Portland, and Seattle Railway 303 and 306, American Locomotive Company (ALCO) Type C424s at Spokane, Washington, April 13, 1968.

Spokane International Railroad (SI) diesel locomotive 203, a Class RS1 at Spokane, Washington, undated. Other Subject Classes: Locomotive-Diesel

Spokane International Railroad Alco RS3 diesel locomotive number 211 with a boxcar and caboose at Spokane, Washington, circa 1955. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, wood caboose.

Spokane International Railroad Alco RS3 diesel locomotive number 211 at Spokane, Washington, circa 1955. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive .

Northern Pacific passenger train number 2, the eastbound Mainstreeter, stands at the station at Spokane, Washington, in July 1968, behind two-unit diesel locomotive led by number 6703C, a 1750-hp model F9, built by Electro-Motive Division in 1956. Seven-car train consists of baggage car, coaches, cafeteria car, sleeping car, and business car for company officials. Photo by J.M. Fredrickson. Other Subject Classes: passenger train, diesel locomotive, passenger station

Northern Pacific F-9 diesel locomotive 7008D in a yard at Spokane, Washington, on 1968. Blackhawk Films slide, GJ Werkema collection. Other subject classes: freight train, diesel locomotive

Northern Pacific Number 6701B, an Electro-Motive Division (EMD) Type F9B, at Spokane, Washington, June 1969.

Northern Pacific diesel locomotive number 6505 at the station in Spokane, Washington, in 1949. NP 6505 is an F-3 built by Electro Motive Division of General Motors Company in 1947. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number 6504 in the station at Spokane, Washington, in 1950. NP 6504 is an F-5 built by Electro Motive Division of General Motors Company in 1948. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number 6503 in the station at Spokane, Washington, on May 20, 1952. NP 6503 is an F-3 built by Electro Motive Division of General Motors Company in 1947. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,