Great Northern Diesel Locomotive 663, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 668, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 668, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 688 at Wenatchee, Washington, June 8, 1968, Big Sky Blue paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 688 at Wenatchee, Washington, June 8, 1968, Big Sky Blue paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 692 at Wenatchee, Washington on undated. The photograph shows an Electro-Motive Division Type GP-9, Great Northern Class GP-9. The locomotive is painted in the simplified green and orange scheme. Other subject classes: Locomotive-Diesel

Great Northern Diesel Locomotive 693, Class GP9 in Wenatchee, Washington, undated. This photograph was taken before dynamic brakes were installed. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 714, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 715 at Wenatchee, Washington, July 1969, simplified orange/green paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 717, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 720, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 720, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 724, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 731, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 732 at Wenatchee, Washington, June 8, 1968, Big Sky Blue paint scheme. Other subject classes: Locomotive

Great Northern Diesel Locomotive 732, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive , Class SD45 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Number 578, a Type SD9, at Wenatchee, Washington, June 1969.

Great Northern Diesel Locomotive , Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive Service Facility at Wenatchee, Washington, April 4, 1987, diesel locomotive service facility. Other subject classes: Structure, Diesel Servicing

Great Northern Diesel Locomotives 200 and 219, Class RS3 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 2504 and 2519, Class U25B in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 472D and 446, Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 472D and 446D, Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 472D and 446D, Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 721, Class GP9 and 464A, Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 721, Class GP9 and 464A, Class F7 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotives 724 and 731, Class GP9 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Servicing at Wenatchee, Washington, 1987. Photograph by George Werkema.

Great Northern electric locomotive 5000B, Class Z1 in Wenatchee, Washington, undated. Photograph by Wade Stevenson.