That should have been the Spokane via Cascade Tunnel(1927) to Seattle and Portland. The motive power will be 4-8-4 Northerns,4-8-2 Mountains,and Mallets like 2-8-8-0 and 2-8-8-2. Will be in 2-rail O scale,of course
No "Omaha Orange" in the 1930-40 decade. The Omaha Orange / Pullman Green "Empire Builder" paint scheme wasn't introduced until the railroad's first FT diesels arrived - 1944 IIRC. No passenger cars were painted in those colors until the first streamlined cars in 1947, which I think is also when the railroad began painting the electric motors into the green and orange scheme. Before that, they were Pullman Green with Dulux Gold lettering.
I don't believe the GN had a mainline from Portland to Spokane. Instead they owned, jointly with the Northern Pacific, the Spokane, Portland and Seattle, which did have a mainline from Portland to Spokane.
Of course, you can certainly model that line as if it was GN...
Mark P.
Website: http://www.thecbandqinwyoming.comVideos: https://www.youtube.com/user/mabrunton
If I model the Great Northern Railway Portland to Spokane mainline in 2-rail O scale in the 1930-40 era the steam locomotives I want to model is the big 4-8-4 Northerns,4-8-2 Mountains, various Mallets,and electric locomotives in Omaha Orange.