Southern Pacific Railroad diesel locomotive number 3002 at Palo Alto, California on August 09, 1973. SP 3002 and another unit leads six-car commuter Train No. 122 at Palo Alto in 1973. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train, truss bridge.

Southern Pacific Railroad diesel locomotive number 3001 at Palo Alto, California on August 09, 1973. SP 3001 and 3005 lead a commuter train No. 126 at Palo Alto in 1973. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train.

Southern Pacific Railroad diesel locomotive number 2608 at Portland, Oregon in 1990. SP 2608, an EMD SW1500 switcher, parked at Portland in 1990. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive.

Southern Pacific Railroad diesel locomotive number 2549 at Redwood City, California on August 28, 1975. SP 2549 with a switch drag at Redwood City in 1975 Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, switcher locomotive.

Southern Pacific Railroad diesel locomotive in August 1975. SP 9042 and 9119 lead a local freight train in California in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Southern Pacific Railroad diesel locomotive 9310 in August 1975. SP 9310 and 8483 lead a westbound extra freight train in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train.

Southern Pacific Railroad diesel locomotive 9140 in August 1975. SP 9140 and 3226 on a westbound extra freight train in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, railroad crew.

Southern Pacific American Locomotive Company type PA 6007 along with another type PA after cutting off the inbound Southern Pacific passenger train "Cascade" at Portland Union Station in 1959. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Depot-Passenger.

Southern Pacific 3822 on a transfer freight from Southern Pacific Railroad's Brooklyn Yard, train is about to enter Union Pacific Railroad's Albina Yard. in 1978. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel, Train-Freight.

Southern Pacific Baldwin switcher 1495 and Union Pacific SW switcher 1837 with transfer trains at the south end of Portland Union Station in 1962. Photograph by Alden Raney. Other subject classes: Locomotive-Diesel.