Water & Drought

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.

Water & Drought

Oroville Dam: Evacuation warnings lifted for Butte County

More than a month after a near-catastrophe at Oroville Dam sparked mass evacuations, Butte County’s sheriff Wednesday, March 22, 2017, lifted the evacuation warning that had remained in place for thousands of downstream residents. Seriff Kory Honea lifted the warning, saying the situation had stabilized at Lake Oroville in the weeks following the evacuation.

Water & Drought

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

Jennifer Harrison of Sacramento Valley Water interviews Matt Murray of the California Department of Water Resources about reopening the Oroville Dam spillway today, March 17, 2017. The fractured main spillway was set to resume outflows Friday after a three-week shutdown as state officials concentrate on reducing water levels at the troubled reservoir.

Water & Drought

Watch the Oroville Dam spillway reopen

In a new test of Oroville Dam’s battered infrastructure, water resumed flowing down the fractured main spillway Friday, March 17, 2017, after a three-week shutdown, as state officials concentrate on reducing water levels at the troubled reservoir.

Water & Drought

A look at repair efforts at the Lake Oroville dam spillway this week

Images from the state Department of Water Resources show round-the-clock work the week of March 11-17, 2017 at Oroville Dam. A giant fracture developed in Oroville Dam’s main spillway during a heavy storm earlier this year. Five days later, water flowed over the dam’s emergency spillway for the first time, nearly causing the hillside below to fail. Approximately 188,000 downstream residents were evacuated for two days.

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