Burlington Northern trailer is unloaded from a flat car by a Piggy Packer at South Seattle, Washington, on April 26, 1971. This event is commemorating first arrival of train number 3 at South Seattle. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive.

Burlington Northern trailer is unloaded from a flat car by a Piggy Packer at South Seattle, Washington, on April 26, 1971. This event is commemorating first arrival of train number 3 at South Seattle. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Burlington Northern train 3, the Chicago to Seattle TOFC service named the Pacific ZIP, arrives for the first time at the South Seattle intermodal terminal with 6474, 6476 and 6481. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Officials prepare to commemorate Burlington Northern train 3, the Chicago to Seattle TOFC service called the Pacific ZIP led by 6474, 6476 and 6481, on its first arrival at the South Seattle intermodal terminal. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Burlington Northern train 3, the Chicago to Seattle TOFC service named the Pacific ZIP, arrives for the first time at the South Seattle intermodal terminal with 6474, 6476 and 6481. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Burlington Northern train 3, the Chicago to Seattle TOFC service named the Pacific ZIP, arrives for the first time at the South Seattle intermodal terminal with 6474, 6476 and 6481. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Officials prepare to commemorate Burlington Northern train 3, the Chicago to Seattle TOFC service called the Pacific ZIP led by 6474, 6476 and 6481, on its first arrival at the South Seattle intermodal terminal. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern diesel locomotive 6474 at South Seattle, Washington, on April 26, 1971. Officials prepare to commemorate Burlington Northern train 3, the Chicago to Seattle TOFC service called the Pacific ZIP led by 6474, 6476 and 6481, on its first arrival at the South Seattle intermodal terminal. Photo by J.M. Fredrickson. Other Subject Classes: freight train, diesel locomotive, people.

Burlington Northern crew 10 with diesel locomotive 2507 moves under a cantilever signal bridge with a Holland America Westours full-dome passenger car at South Seattle, Washington, in 1987. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, car switching, signal equipment

Amtrak diesel locomotive 243 at South Seattle, Washington in June 1974. Amtrakm243 leads train number 1798 at South Seattle in 1987 Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, passenger train