I'm a huge fan of Hydro - we already have most of the dams we need in place, may as well take advantage of them! but nope.

i understand the fish migration issue, but most places like the one near me have an elevator system and they do their best to get as many fish up and over the dam as possible.

Plus it's a great educational thing for all ages, I usually spend 3 months watching fish swim into the elevators and up to the other side.