Western Pacific Railroad diesel locomotive 137 with a freight train at Oroville, California on June 23, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Union Pacific diesel locomotive number 2830 leads the Western Pacific Railroad Ford train at Oroville, California on June 23, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Western Pacific Railroad diesel locomotive 3518 and other units at the fuel rack in Oroville, California on June 22, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Western Pacific Railroad diesel locomotive 3518 at Oroville, California on June 23, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Western Pacific Railroad diesel locomotive 3542 leads the Ford train at Oroville, California on June 23, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Western Pacific Railroad diesel locomotive 713 leads a train at Oroville, California on June 22, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Four Western Pacific Railroad diesel locomotives lead freight train 137 at Oroville, California, circa 1982. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive