>There's rail access to Port Edward (just a couple miles from Prince Rupert) currently, going by what you can see in Google Maps. Looks like it follows a pretty flat route, though it winds around to follow the shorelines / rivers.
There is a railroad, but that is a windy, two-track railroad for the last ~200 kilometers from Kitwanga to Port Edward, with associated capacity limits and costs. To reach Kitsault from the relatively wide, flat Nisga'a Highway corridor, you need a tunnel of about 25 kilometers, but this could fit four or more tracks and run a much straighter, faster course. You can clearly see the difference:
There is a railroad, but that is a windy, two-track railroad for the last ~200 kilometers from Kitwanga to Port Edward, with associated capacity limits and costs. To reach Kitsault from the relatively wide, flat Nisga'a Highway corridor, you need a tunnel of about 25 kilometers, but this could fit four or more tracks and run a much straighter, faster course. You can clearly see the difference:
https://i.postimg.cc/RhBLxfQx/railbc.jpg