It's easy to say this after the fact, but infrastructure like that has a minimal budget for that sort of stuff. If we did this on every dam in the US, it would

It's easy to say this after the fact, but infrastructure like that has a minimal budget for that sort of stuff. If we did this on every dam in the US, it would potentially amount to a billion dollars or more. At a time when the government is trying to claw back budgets, that sort of thing is never going to be approved.