They are talking gigawatt. That pretty much implies dedicated long-distance transmission lines. The 1.4 GW they mention are very close to the full output of three mile island. This is not a small power situation that is done with existing power lines. And the moment you drag power in from 20+ miles away, you might as well just put fiber in there as it seems very easy given by how prevalent it is for long distance lines these past decade or two.