It's really hard to express that scale. I've spent a fair amount of time 'gunkholing' the bays and estuaries on the river, many of them blind. I mean you can't see in from the main body of the river. If you pull into one and somebody is already there just go to the next one. A certain amount of skinny dipping may have occurred there... You can actually take a normal pleasure boat about 145 miles without leaving the impoundment,

I got an inside tour before the third powerhouse was built. Friend of my sister got his engineering degree and went to work for the Bureau and asked me if I'd like to plow around with him. Yes, please. Those turbines are just nothing short of really impressive.