Indeed... I suppose that's what makes a good intro; Just enough to present several probabilities, not enough to figure anything out from it.

I like the Hydroelectrics idea alot, Hoover Dam is one piece of real-estate that will still be around Long after we're gone, it makes sense that they could get power from it again. Or like Syraxis says, the west-coast has been rebuilding alot more than the east. Either way I like that fact that there's power.
If the Hoover dam remained untouched, it would likely remain functionable, A show on the History channel I saw recently reaffirmed this, The dam can run for a long long time with no human interaction, so with some intermittant maintenance it could very well still be operational. Depending on when the game takes place, which I'm really wondering about..
Damn this teaser, now NV is all I can think about, and I have a ton of games to play, but I'm just lurking around various sites for info..