Burlington Northern 725, former Northern Pacific 6011C at the Interbay roundhouse in Seattle, Washington, in August 1971. Northern Pacific 6011C, a type F7B built by General Motors Electromotive Division in 1950. Photo by GJ Werkema. Other subject classes: diesel locomotive, F7B

Burlington Northern diesel locomotive 182, formerly Northern Pacific 123, at Interbay, Washington, on February 26, 1973. Number 182 is an SW1200 built by General Motors Electro Motive Division (EMD), builder's number 20332. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 182, formerly Northern Pacific 123, at Interbay, Washington, on February 26, 1973. Number 182 is an SW1200 built by General Motors Electro Motive Division (EMD), builder's number 20332. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive.

Burlington Northern diesel locomotive 215, formerly Northern Pacific 156, at Interbay, Washington, on June 23, 1973. Number 215 is an SW1200 built by General Motors Electro Motive Division (EMD), builder's number 22758. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, oil tank.

Burlington Northern diesel locomotive 217, formerly Northern Pacific 158, at Interbay, Washington, on June 23, 1973. Number 217 is an SW1200 built by General Motors Electro Motive Division (EMD), builder's number 22760. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight yard.

Colorado and Southern Railway diesel locomotive 921 connected to Burlington Northern 6824 at Interbay Yard in Seattle, Washington on May 10, 1974. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive

Burlington Northern 800, former Northern Pacific 7000A coupled to two former Great Northern Units at the Interbay roundhouse in Seattle, Washington, in August 1971. Northern Pacific 7000A, a type F9A built by General Motors Electromotive Division in 1954. Photo by GJ Werkema. Other subject classes: diesel locomotive, F9

Great Northern Diesel Locomotive 187 at Interbay, Washington, December 1, 1973, original orange/green paint scheme (as Burlington Northern 987). Other subject classes: Locomotive

Great Northern Diesel Locomotive 222 at Interbay, Washington, 1963, original orange/green paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 2506 at Interbay, Washington, August 1967, simplified orange/green paint scheme. Other subject classes: Locomotive