SP&S ALCO S-2 diesel locomotive Number 23 switcher on the Oregon Electric Railway at Eugene, Oregon in September 1956. Photo by Stan Styles.

Southern Pacific Railroad diesel locomotive number 9505 at Eugene, Oregon on May 28, 1974. SP 9505 parked at Eugene in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, locomotive facility.

Southern Pacific Railroad diesel locomotive number 8980 at Eugene, Oregon on May 29, 1974. SP 8980 and 8961 parked by the yard tower in Eugene in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Southern Pacific Railroad diesel locomotive number 8961 at Eugene, Oregon on May 29, 1974. SP 8961 and 8980 parked by the yard tower in Eugene in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, tower.

Southern Pacific Railroad diesel locomotive number 4370 at Eugene, Oregon on May 30, 1974. SP 4370 and caboose 1214 make a hoop at Eugene in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, steel caboose.

Southern Pacific Railroad diesel locomotive number 3100 at Eugene, Oregon on May 31, 1974. SP 3100 parked near the hump tower of the classification yard at Eugene in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, tower.