The base would likely be located near Barrow, Alaska.
It will handle the expansion of traffic in the Arctic Ocean, and will coordinate traffic through the Bering Strait with the Russians.
When there is an open path during the summer months, which appears to be happening ahead of the worst cases given by climate change scientists, the traffic through such a “Northwest Passage” could be significant, and would require significant monitoring and aid by coast guards of all the nations on the arctic ocean.
Needless to say, this is a rather profound manifestation of global warming, notwithstanding the protestations of the global warming deniers.