The last time Lake Oroville neared capacity was four years ago, and very quickly it plunged into drought territory and has seen low water levels until this winter. And now that billion-dollar, renovated spillway is back in use as the reservoir is back at 99% of its capacity.

It's been a total reversal of fortune this year for Lake Oroville and the recreational houseboaters who like to hang out on the reservoir, with the water level now over 100 percent of its historical average. But Lake Oroville is returning to a point of too much of a good thing.

Work to redesign and replace the heavily damaged main spillway at Oroville Dam is underway, with officials saying that design work is about 60 percent complete on this rush job, which could begin