[freeone3000]

There's enough federal land in Arizona to do it.

The St James Bay project is a sequence of hydroelectric dams covering an area the size of Scotland -- and it was done in the sixties. We're going to need the power. It's unit-profitable. So really, the issue is where to stick it.

(It would, of course, be much more reasonable to simply cover the rooves of all existing buildings, which is a larger area, and have some accessory generation as well.)