The plant may be operational by Thursday!
http://www.sacbee.com/news/state/california/water-and-drought/article135422349.html
An amazing feat if they do.
There was a short video there showing they are already attacking the rock pile.
From your link:
...crews are working to get transmission lines running from the plant reattached to the powergrid...
...the powerplant when fully operational can release about 14,000 cubic feet per second...
... the lake level rose about two feet over night to 840 feet, or 61 feet below the top...
...officials said they’ll open the spillway up again before the lake rises to above 860 feet...
...heavy equipment operators will work round the clock the next few days attacking the debris pile...