Well to go electric ( autos / other ) the US would have to double its electric generating capacity not to say anything about what a massive transmission line upgrade it would require. Hydrogen manufacturing ( which would be better if the cost can be reduced ) again would require a doubling of electric generating capacity. So if no nuke, no coal, no natural gas, solar limited, wind generation capacity small, and no hydro then what? Coal oil stoves and lamps? While the Columbia Basin dams have not been good for fish they enabled the PNW economy and descent standard of living to our state and others. The minute that a viable alternative is found there will be changes with the dams but not all will go as flood control is a major function of the system. Some years back the dams got with in a fraction of an inch to having to bypass full flow at flood stage which would have created havoc from John Day down stream.

Want to hear screaming? Tell the urban areas that their power bill is tripling! Rural areas the same but they have long since thrown their hands in the air since PS began to dominate the state government. So you want changes in the dams? Support those who want a Manhattan Project for energy. Technology that is out there now and full blown effort to develop hydrogen as our primary fuel it could be done. It just takes a government that wants to get it done for the benefit of the people and environment. Frankly in the last 4 administrations other than hot air and a truck load of bs little is done. Five spot bet that it ain't gonna change anytime soon. Remember the line from the movie nothing changes until we are at the precipice ? Well we ain't there yet, which is a bit sobering to say the least.