Oroville, Calif. -- Crews went back to work again on the Oroville Dam at midnight on Tuesday for phase two of construction.
This year, crews will be replacing the temporary walls with permanent structural concrete walls.
Crews are removing the temporary roller-compacted concrete walls in the middle section of the main spillway.
"It's difficult to do that during the winter when it's raining, it's not safe. Now the rain has stopped so that's why they've kicked off this. That's why they kept the water level a little lower and not scramble around if you would," said Kevin Zeitler, Chairperson of the Oroville Recreation Advisory Committee.
Back in November, the DWR repaired and reconstructed the main Lake Oroville spillway to handle flows of up to 100,000 cubic feet per second.
Construction also focused on sealing drains, concrete seams, and drain pipes.
For residents who might be concerned about closures for recreational activities on Lake Oroville, Zeitler says not to worry. Zeitler said there might be a longer wait to access recreational activities on Lake Oroville, but construction will not force these activities to close.
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