Great Northern Diesel Locomotive 602, Class GP7 heading the "Cascadian" in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 602, Class GP7 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 602, Class GP7 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 649, Class GP7 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 649, Class GP7 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Diesel Locomotive 721 at Skykomish, Washington, 1965, original orange/green paint scheme (on train). Other subject classes: Locomotive

Great Northern electric locomotive 5002B, Class Z1 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern Electric Locomotive 5006A at Skykomish, Washington, undated. Other subject classes: Locomotive

Great Northern electric locomotive 5010, Class Y1 in Skykomish, Washington, undated. Photograph by Wade Stevenson.

Great Northern electric locomotive 5010, Class Y1 in Skykomish, Washington, undated. Photograph by Wade Stevenson.