Oregon Electric ALCO RS-1 diesel locomotive Number 52 in the yard at Portland, Oregon on May 21, 1945. Locomotive later sold to the SP&S. Photo by Don Roberts.

Oregon Electric ALCO RS-1 diesel locomotive Number 52 in the yard at Portland, Oregon on May 21, 1945. Locomotive later sold to the SP&S. Photo by Don Roberts.

Oregon Electric ALCO RS-1 diesel locomotive Number 52 in Hoyt Street Roundhouse lineup at Portland, Oregon on May 1, 1946. Locomotrive later sold to the SP&S. Photo by W. C. Whittaker.

Northern Pacific Terminal station at Portland, Oregon, in 1948. Aerial photo looking north at Union Station, platforms, passenger and freight yards under water during Columbia/Willamette river floods. J.M. Fredrickson collection. Other Subject Classes: station, railroad yard

Northern Pacific Terminal locomotive facility at Portland, Oregon, in 1948. Looking down on service yard, water tank, sanding tower, car shed, Great Northern and Spokane Portland & Seattle steam locomotives, yard tracks, Union Station platform sheds in water. J.M. Fredrickson collection. Other Subject Classes: locomotive facility, water tank, sanding tower, steam locomotive, railroad yard, station

Northern Pacific Terminal American Locomotive Company switcher 44 cutting off sleeping car from inbound Union Pacific passenger train "City of Portland". It will also switch sleeping cars off the Southern Pacific train "Cascade" and place them on the northbound Union Pacific pool train to Seattle in 1959. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Car-Sleeper.

Northern Pacific Terminal American Locomotive Company 42 and 37 bring in a transfer job from Guilds Lake Yard to the yard at Portland Union Station in 1965. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Train-Freight.

Northern Pacific Terminal American Locomotive Company 42 and 37 bring in a transfer job from Guilds Lake Yard to the yard at Portland Union Station in 1965. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Train-Freight.

Northern Pacific Terminal American Locomotive Company 41 switches Spokane, Portland and Seattle Railway wrecking crane X-5 at Hoyt Street Yard in Portland in 1962. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Wrecker.

Northern Pacific Terminal American Locomotive Company 37 switches a Southern Pacific passenger train into Portland Uinon Station in 1962. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Train-Passenger.