.......for the folks that may not realize....dredgers did exactly what they are attempting to do,for a lot less $$$(multi millions),and none of the environmental damage they are causing.This isnt the first one of these they have done either.....they did one on the Stanislaus above Knights Ferry
They did it below Englebright dam on the Yuba also, total wasteland now - thanks again to "theoretical scientists".
I remember about 20 yrs ago, they spent close to a million bringing in 5 ten ton boulders to create "scour pools" in the Truckee river in downtown Reno. It
was front page news with huge cranes, etc. Can't find a trace of those boulders now. Why are they so arrogant to think nature gives a s**t what we puny humans do?