Portland Terminal Railroad Company Alco S-4 diesel locomotive number 41, built in 1952, at Portland, Oregon, circa 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive .

Portland Terminal Railroad Company Alco S-4 diesel locomotive number 42, built in 1952, parked at Portland, Oregon, on September 1, 1970. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive .

Amtrak E-Unit 334 brings in a southbound passenger train to Portland in 1975. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Train-Passenger.

Portland Terminal Railroad American Locomotive Company 36 brings in Southern Pacific locomotives 9313 and 8747 from Guilds Lake Yard to Portland Union Station in 1979. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Portland Terminal Railroad American Locomotive Company 36 with Burlington Northern caboose 10162 at south end of Portland Union Station in 1979. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Caboose-Steel.

Portland Terminal Railroad American Locomotive Company 36 at Portland Union Station in 1979. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Portland Terminal Railroad American Locomotive Company 36 switching at Guilds Lake Yard in 1984. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Portland Terminal Railroad American Locomotive Company 36 switching cars at Guilds Lake Yard in 1984. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.

Portland Terminal Railroad American Locomotive Company 39 at Portland with Industrial Air Products tank car IAPX 1008 in 1962. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Car-Tank.

Portland Terminal Railroad American Locomotive Company 39 at north end of Portland Union Station in 1981. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.