California

Water & Drought

Damage, design flaws in Oroville Dam spillway point to lengthy repairs, consultants say

The main spillway at Oroville Dam is riddled with design flaws and so badly damaged that an independent panel of experts hired by the state has concluded it’s probably impossible to repair the structure completely before the next rainy season begins in November. The panel of four engineering consultants, in a recent memo to the state Department of Water Resources, said it believes the concrete spillway can be made functional enough to release water from Lake Oroville during the next rainy season.

Water & Drought

New look at Oroville Dam spillway after reopening

New video shows water coming down Oroville Dam's main spillway on March 21, 2017. The dam’s main spillway fractured Feb. 7, 2017, prompting a temporary shutdown of the structure as a big storm rolled in. On Wednesday, more than a month after a near-catastrophe at Oroville Dam sparked mass evacuations, Butte County’s sheriff Wednesday lifted an evacuation warning that had been in place for thousands of downstream residents.

Videos

New look at Oroville Dam spillway after reopening

New video shows water coming down Oroville Dam's main spillway on March 21, 2017. The dam’s main spillway fractured Feb. 7, 2017, prompting a temporary shutdown of the structure as a big storm rolled in. On Wednesday, more than a month after a near-catastrophe at Oroville Dam sparked mass evacuations, Butte County’s sheriff Wednesday lifted an evacuation warning that had been in place for thousands of downstream residents.
Department of Water Resources
New look at Oroville Dam spillway after reopening 0:53

New look at Oroville Dam spillway after reopening

Whitewater flows as damaged Oroville Dam spillway is reopened 0:37

Whitewater flows as damaged Oroville Dam spillway is reopened

Watch the Oroville Dam spillway reopen 0:18

Watch the Oroville Dam spillway reopen

Oroville Dam spillway ready to run again: How DWR did it 2:42

Oroville Dam spillway ready to run again: How DWR did it