Oroville Spillway is failing with enough rain dam may break - Page 4 - Mountain Buzz

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Old 02-13-2017   #31
Rosa, At the bottom of the Lake
Paddling Since: 1996
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These events have fascinated me from the moment the news broke. Who needs a monkey wrench when you have FERC. I imagine things are going to be getting weird throughout California and the rest of the West if this season keeps delivering the goods.

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Old 02-13-2017   #32
Bozeman, Montana
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really crazy drone footage of the spill of the emergency spillway: Drone video shows the Oroville Dam crisis - SFGate
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Old 02-13-2017   #33
Salida, Colorado
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Originally Posted by richp View Post

It does look like they could have gone to school on Glen Canyon '83 when it comes to learning how to retrofit a smooth concrete surface to resist cavitation.


Rich Phillips
And maybe planning too!
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Old 02-28-2017   #34
cedar city, Utah
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The photos of the damage to the main spillway after they shut off releases yesterday are phenomenal. The scale of that spillway was lost on me until I saw the helicopter in the photo. Such a massive structure.

How do they fix something like that? Not to mention all of the dredging and cleanup of the river channel so the lower power station is protected for operation.

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Old 03-02-2017   #35
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Laramie, Wyoming
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Great drone footage of before/during/after.

oroville dam spillway - Album on Imgur
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Old 04-02-2019   #36
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Wheat Ridge, Colorado
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Followup on Oroville

Here's an HCN article on the expert report on the Oroville Dam incident in 2017, when the dam was nearly lost due to overfilling:

What went wrong at Oroville?

From the article:

[The report]...describes the physical factors that caused the spillways to crumble, problems like unstable rock foundations and cracked concrete that allowed water beneath the main spillway.

The report also highlighted human and organizational errors, including faulty design details, shortsighted inspections and “overconfident and complacent” management by the California Department of Water Resources. The department “take(s) the findings very seriously,” said then-director Grant Davis in a statement. “We will … incorporate the lessons learned going forward.”
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse
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