Cowlitzfishermen.......you ever been in a dam? do you know anything about there operation? there is no way these are going to be silted in , some are more than 50 years old .whats this dams being silted in thing your talking about ? what I had posted was fact ,wheres this silted in study of yours? I do know that part of a study done on breaching shows that there is a question with the areas behind the dams that have alot of built up silt and will wash downstream onto crab beds.....We depend on these dams (columbia and snake river hydroelectric dams, I do not know or care about others) and untill there is an alternate power source, which right now there is none nor in the foreseeable future.... the dams will be here long after you and I have gone.