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DWR Set To Finish Major Work On Lake Oroville Main Spillway Project

Bob Moffitt / Capital Public Radio

Crews set up concrete pours in a checkerboard pattern at Lake Oroville. Workers must wait four days for concrete to cure before pouring adjacent concrete. Millions of cubic feet of concrete will be poured before the project is completed.

Bob Moffitt / Capital Public Radio

The California Department of Water Resources says crews are pouring the last bit of concrete on the bottom sections of the new Lake Oroville main spillway project.

Erin Mellon with DWR says that Wednesday is the deadline for the major work to be completed.

"The work that will continue past Nov. 1 on the main spillway is going to be focused on site cleanup, sealing of drains, concrete seams and drainage pipes," Mellon said. 

Crews are also working on a cutoff wall to limit erosion below the emergency spillway.

The main spillway failed in February and DWR allowed water to overtop the emergency spillway. That caused significant erosion to the hillside below. About 180,000 people were evacuated.

Crews will tear down and rebuild the top 730 feet next year. They will also begin construction of a splash pad and partial ramp below the emergency spillway next year.

Bob Moffitt

Sacramento Region Reporter

Bob reports on all things northern California and Nevada. His coverage of police technology, local athletes, and the environment has won a regional Associated Press and several Edward R. Murrow awards.   Read Full Bio 

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