So with all of the upper dams full, a huge snow pack that could take all summer to melt off, the time it takes to draw new plans, plan check and engineering, and the possibility of another heavy winter next year, there may be a huge logistics problem here. Plus the fact of unforeseen problems discovered after demolition and environmentalists breathing down the contractors necks about polluting the feather river.
Plus you need to add in rising the power plant lower level and its equipment. That is your relief valve and needs to be restored and repaired first in my opinion. When working, it can release about 20,000 cfs, a third of what we are releasing now. When the main spillway is unusable as under repair, the only relief valve you have, as I understand it, is what comes out of that area of the dam. That needs to start in ten days as this last river of rain passes.