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130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:04 am
Just on FNC.
Line of vehicles 25 miles long leaving area.
Police roadblocks to prevent people going into danger area.
Oroville Dam is in danger of failing. Emergency spillway is apparently eroding upwards towards damn structure.
Helicopters are dropping rip rap in spillway.
Dire situation.
Tallest earthfill dam in US, operational since 1968.
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:13 am
(This post was last modified: February 13, 2017 at 2:17 am by vorlon13.)
Wiki notes Oroville impounds 4.4 cubic kilometers of water. For scale, the 100+ day of flooding on the Missouri River from Kansas City to Montana during the summer of 2011 carried over 40 cubic kilometers of water.
Also, the infamous Teton Dam failure back in the 70s, had a capacity of ~ 8% of the Oroville dam.
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:22 am
I'm in California, but a way different part. Oroville is in the Northstate near Chico, which is a college town of about 85,000. About 75 miles north of Sacramento, where I went to university. I was watching a local (Chico/Redding) ABC affiliate on the web tonight, and they spent the evening in breaking news mode for it. Not sure if they're on now, but you can get info here if you're interested:
http://www.krcrtv.com/
Also, here: http://www.actionnewsnow.com/
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:33 am
Presscon just announced they are emptying the dam at 100,000 cfs and it is filling at 40,000. They really want to get the water level down before the next rain, forecast for around Thursday.
Apparently they are using the main spillway now, and have slowed/stopped the flow over the emergency overflow.
Also, rumors of looting are unfounded. 1 bar had an attempted break in.
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:45 am
(This post was last modified: February 13, 2017 at 2:45 am by vorlon13.)
Release rate of 100,000 cfs is nothing to sneeze at. During the 2011 flood on the Missouri, Gavins Pt Dam (last dam on the Missouri, near Yankton S.D.) the output was 160,000 cfs for weeks and it was a huge mess downstream.
Not to be snarky, but it's impressive the Gavins Pt Dam spillway was able to take the sustained pounding of that for 100+ days with minimal damage, and Oroville Dam apparently couldn't withstand a similar flow for a week . . .
And don't get me started on Teton Dam . . . . .
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:48 am
The meteorologist was saying that the DWR told him that the river levee is rated to handle a max 200,000 cfs and that the peak, as you said, was at 160,000, which was pretty serious.
I guess the real worry is the damage/erosion northwest of the emergency spillway, near the parking lot. That's rated to handle 0 cfs. And there was a lot of flow over that portion.
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 2:58 am
The 160,000 cfs was the maximum flow on the Missouri River during the 2011 flood that is still vivid in my memory.
100,000 cfs on the Feather river is just freaking astonishing!
Apparently the evac area is from the dam clear to Sacramento.
The 'theoretical' maximum flow rate out of (an intact) Gavins Pt Dam is ~ 550,000 cfs*. I wouldn't want to be around for that, 160,000 was bad enough.
*I went to a couple NRC meetings on the flood endangered Ft Calhoun power plant. That was a grim experience. And 550,000 cfs isn't the 'worst' scenario the NRC examined . . .
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 4:17 am
The main spillway damage has advanced pretty heavily. That's pretty scary looking. Apparently, this is the first time the emergency spillway has ever been used.
![[Image: 20170209-100707-jsefh-jpg.24407]](https://www.metabunk.org/attachments/20170209-100707-jsefh-jpg.24407/)
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 4:45 am
yikes. Is this spillway damage undermining the stability of the dam itself?
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RE: 130,000 People being evacuated downstream of Oroville Dam
February 13, 2017 at 5:24 am
No. The dam is intact and in no danger. The worry is that the erosion continues and the spillway won't be usable.
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
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