Nice, that's a part of the old Milwaukee Road from Chicago to Seattle! In photos from your link, you can that some of the structures for holding the overhead c

Nice, that's a part of the old Milwaukee Road from Chicago to Seattle! In photos from your link, you can that some of the structures for holding the overhead catenary wire are still present. When that line was built, that section was the longest electrified train line in the world. I'm pretty sure they did it because of the grades. https://en.wikipedia.org/wiki/Olympian_Hiawatha https://en.wikipedia.org/wiki/Olympian_Hiawatha