"But the good news is that the bridge will eventually get built if for no other reason than Anchorage is running out of open space to build homes and businesses."
Anchorage is about 2000 sq. miles with a population of about 300,000. Singapore comprises about 280 sq. miles with a population of 5.4 million. I would suggest that Anchorage can build vertically, like most cities, for quite awhile before having a space problem.