You can build them just about anywhere, all you need is a tiny amount of land area for the reservoirs enough of a vertical gradient. There are large mountain ra

You can build them just about anywhere, all you need is a tiny amount of land area for the reservoirs enough of a vertical gradient. There are large mountain ranges running down both coasts with more than enough space to accommodate this. Looking at the surrounding geography of the bath county installation alone looks like it could easily be scaled to 10 times it's current size.