We built an interstate across an entire mountain range. Just because a road goes over a mountain does mean it can’t be easily possible at highway speeds.
Well, sure. but they're looking to put in a gravel road. king cove, population 757. I think you'd want a road grader to start, I don't see a quarry on the map, but maybe there's one near by. You could also move a rock crusher up there. I mean, it's fine, but gravel roads are kind of a pain. you have to keep adding more, year after year. I mean, you could pave it, but asphalt doesn't like freezing and thawing over and over. But sure, a good road could be built.
If they're concerned about emergency services - Anchorage seems like the closest trauma center. 900 miles away. Maintain the airport and keep a plane there. Screwing around with an hour drive before getting to a plane seems like the kind of plan that won't really help much if you need emergency services.