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US: Lake Oroville spillway project making good progress

Project Updates // March 7, 2017

Crews working at the Lake Oroville Spillway in California are continuing to make progress on the project, nearly one week since flows from the spillway were halted to give excavators better access for debris removal.

“Our crews continue to make great progress on this 24/7 operation,” said Department of Water Resources (DWR) Acting Director Bill Croyle. “We’re seeing very positive results from their efforts.”

The wet weekend weather has not significantly interfered with debris removal or created a lake elevation concern. DWR will continue to monitor the weather forecast.

DWR does not expect Lake Oroville to rise above 860ft elevation while spillway flows are halted. This still would be 41ft below the level at which the emergency spillway would be used.

In the channel at the base of the main spillway, approximately 329,000 cubic yards of the estimated 1.7 million cubic yards of debris have been removed.

The dredging will help the Hyatt Power Plant reach full capacity. Debris removal lowered the water level in the channel at the base of the spillway, making it possible for the plant to resume operation Friday.

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