The spur may end up being the reason the Knik Arm Bridge is built, as it will connect with ANC thru Government Hill and the Port.  There is going to be a Trump stimulus for infrastructure to the tune of $1 T over the next decade.  I can see KABATA, Watana, Ambler and the Juneau projects all funded over that time and built despite Walker, the unions, greens, Backbone or Alaska First protestations.  Cheers -