Amtrak diesel locomotive 551 at Centralia, Washington on May 14, 1975. Amtrak 551 leads train number 11 at Centralia in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 553, an EMD SDP40F at an unknown location on August 2, 1976. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 553, an EMD SDP40F near King Dome construction at Seattle, Washington in August 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 555 at Meeker, Washington on December 23, 1974. Amtrak 555 leads train number 11 at Meeker in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 555 at Tacoma, Washington in August 1974. Amtrak 555 leads train number11 approaching McCarver Street in Tacoma in 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 555, an EMD SDP40F at Tacoma, Washington on October 7, 1976. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 556, an EMD SDP40F at Union Station in Portland, Oregon in June 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 556 at Portland, Oregon in June 1974. Amtrak 556 leads train number 11 at Portland Union Station in 1986. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train

Amtrak diesel locomotive 558 at Tacoma, Washington in April 1975. Locomotive 558 makes a station stop with train number 14 at Union Station in Tacoma in 1975. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train