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California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed

 
Use your brian, moran!

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
The Spillway, not the Damn has suffered major Daage due to unexpected erosion. The flows have currently been halted. That is all the info I have read so far.


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 Quoting: #Geomagnetic_Storm#


Weather warfare?
I'm a proud Texan & American, posting from Central Texas & have no clue why my flag shows friggin Canada(no offense to my Canadian friends).

"Men will never be free until the last king is strangled with the entrails of the last priest."

Diderot

"Immigration without assimilation is invasion!" - Anonymous Coward

Gird your lions, shave your Family & panic sex the 'maters!

"When your so-called religion is purely a political theory of conquest, and deception is one of it's core principles then it strikes me as perfectly sane and reasonable to assume literally everyone who is of such a "religion" to be exactly the same POS who deserves to be treated as the enemy non-stop." Darkwolf007
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Head to the mater bunker!

doomalert5
Use your brian, moran!

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
 Quoting: Westsail


Holy shit! THAT is a nontrivial fuckin hole!
I'm a proud Texan & American, posting from Central Texas & have no clue why my flag shows friggin Canada(no offense to my Canadian friends).

"Men will never be free until the last king is strangled with the entrails of the last priest."

Diderot

"Immigration without assimilation is invasion!" - Anonymous Coward

Gird your lions, shave your Family & panic sex the 'maters!

"When your so-called religion is purely a political theory of conquest, and deception is one of it's core principles then it strikes me as perfectly sane and reasonable to assume literally everyone who is of such a "religion" to be exactly the same POS who deserves to be treated as the enemy non-stop." Darkwolf007
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02/07/2017 08:02 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Head to the mater bunker!

doomalert5
 Quoting: Astral Goat


If I was living beneath this reservoir I would take my family out now, ahead of the pack...get a room or stay with reletives at least until these next 3-4 days pass...

How U feelin' btw Astral? Flu still comin' on?
blink
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02/07/2017 08:03 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Head to the mater bunker!

doomalert5
 Quoting: Astral Goat


If I was living beneath this reservoir I would take my family out now, ahead of the pack...get a room or stay with reletives at least until these next 3-4 days pass...

How U feelin' btw Astral? Flu still comin' on?
blink
 Quoting: Anonymous Coward 71484121


Feel much better now thanks
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


No dumb questions.

A "SPILLWAY" is the channel that they use for flowing water out of a lake once it is near full (how near to full depends upon the lake and it's purpose).

Water goes out the spillway, which is located at a level near the top of the dam, but often NOT on the dam structure itself, by gravity and then flows downhill, eventually reaching the old river channel below the dam.

On major dams for the spillway (or sometimes spillwayS) there are GATES that are lifted to allow MORE water to flow out of the lake, and lowered to permit LESS water to flow out of the lake, depending upon how high they want the lake water level to be.

In the case of the Oroville Dam if you go look at it via Google Earth or Bing Maps (click on the satellite option - Bing is better in this case than Google) you can see that the spillway is off to the side and away from the main dam structure. You can also see the control gates that are raised or lowered to control the outflow of the water into the SPILLWAY CHANNEL.

It is the Spillway Channel that has suffered serious damage (if you look at the pictures) AND the damage is severe and undermining the entire spillway itself.

If the undermining would continue, depending upon how they built the control gate structures at the top of the dam, it could undermine the entire channel such that the control gates structures would FAIL ... and then the lake would start to release uncontrollably ... at least until the lake level would fall below the level of channel coming up to the control structures.

Hope that explanation helps.
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Water will find a way!!!!
Use your brian, moran!

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Updated info on how much water they can spill via the Hydro Power Plant ... I was WAY off above.

The Hydro Power Plant can ONLY spill out 5000 cfs of water(cubic feet per second) even as inflows into the lake are running about 130,000 cubic feet per second
 Quoting: Anonymous Coward 52154903


Houston, we have a problem!
I'm a proud Texan & American, posting from Central Texas & have no clue why my flag shows friggin Canada(no offense to my Canadian friends).

"Men will never be free until the last king is strangled with the entrails of the last priest."

Diderot

"Immigration without assimilation is invasion!" - Anonymous Coward

Gird your lions, shave your Family & panic sex the 'maters!

"When your so-called religion is purely a political theory of conquest, and deception is one of it's core principles then it strikes me as perfectly sane and reasonable to assume literally everyone who is of such a "religion" to be exactly the same POS who deserves to be treated as the enemy non-stop." Darkwolf007
Crunch62

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02/07/2017 08:06 PM

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Oroville Dam has a regular spillway, which is the one that failed today. It has gates that can be opened or closed to control the spillway flow.

The dam also has an emergency spillway, which is basically a concrete 'spout' that in theory, would allow water to overtop the dam without causing erosion or structural damage to the dam (since it is an earth-fill dam). Since the emergency spillway has no means of controlling the flow of water, damage downstream could be considerable.
What the Hell?...
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
 Quoting: Westsail


Holy shit! THAT is a nontrivial fuckin hole!
 Quoting: Use your brian, moran!


Yes. Quite serious. If they have to release water thru it it will erode quickly right up to the reservoir itself and then start eroding under it as the entire hillside would wash out from under itself.....
Catastrophic failure....
Use your brian, moran!

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
 Quoting: Westsail


Holy shit! THAT is a nontrivial fuckin hole!
 Quoting: Use your brian, moran!


Yes. Quite serious. If they have to release water thru it it will erode quickly right up to the reservoir itself and then start eroding under it as the entire hillside would wash out from under itself.....
Catastrophic failure....
 Quoting: Anonymous Coward 71484121


yep
I'm a proud Texan & American, posting from Central Texas & have no clue why my flag shows friggin Canada(no offense to my Canadian friends).

"Men will never be free until the last king is strangled with the entrails of the last priest."

Diderot

"Immigration without assimilation is invasion!" - Anonymous Coward

Gird your lions, shave your Family & panic sex the 'maters!

"When your so-called religion is purely a political theory of conquest, and deception is one of it's core principles then it strikes me as perfectly sane and reasonable to assume literally everyone who is of such a "religion" to be exactly the same POS who deserves to be treated as the enemy non-stop." Darkwolf007
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02/07/2017 08:09 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
What cities are below that might be effected?

I have relatives in Chico and Sacramento.


.
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Oroville Dam has a regular spillway, which is the one that failed today. It has gates that can be opened or closed to control the spillway flow.

The dam also has an emergency spillway, which is basically a concrete 'spout' that in theory, would allow water to overtop the dam without causing erosion or structural damage to the dam (since it is an earth-fill dam). Since the emergency spillway has no means of controlling the flow of water, damage downstream could be considerable.
 Quoting: Crunch62


Oh, ok. That is good news then. I wasn't aware of a second 'emergency' spillway.
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
So it's been raining non stop there?
Crunch62

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02/07/2017 08:11 PM

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
What cities are below that might be effected?

I have relatives in Chico and Sacramento.


.
 Quoting: Anonymous Coward 69546725


Chico is to the northwest and would not be affected.

The cities of Oroville, Biggs, Gridley, Live Oak, Marysville, Yuba City, Linda, Olivehurst, Plumas Lake, and Sacramento are downstream and could be affected by a failure of the dam.
What the Hell?...
Anonymous Coward
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02/07/2017 08:13 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
...


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Head to the mater bunker!

doomalert5
 Quoting: Astral Goat


If I was living beneath this reservoir I would take my family out now, ahead of the pack...get a room or stay with reletives at least until these next 3-4 days pass...

How U feelin' btw Astral? Flu still comin' on?
blink
 Quoting: Anonymous Coward 71484121


Feel much better now thanks
 Quoting: Astral Goat

Glad to hear it! Be careful though, could be a false sense of wellness, this thing lasted over a week for me...
Take care of yourself, get lots of rest...
Crunch62

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02/07/2017 08:14 PM

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Forgive my ignorance but what is A spillway? Dam runoff?
 Quoting: Astral Goat


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Oroville Dam has a regular spillway, which is the one that failed today. It has gates that can be opened or closed to control the spillway flow.

The dam also has an emergency spillway, which is basically a concrete 'spout' that in theory, would allow water to overtop the dam without causing erosion or structural damage to the dam (since it is an earth-fill dam). Since the emergency spillway has no means of controlling the flow of water, damage downstream could be considerable.
 Quoting: Crunch62


Oh, ok. That is good news then. I wasn't aware of a second 'emergency' spillway.
 Quoting: Anonymous Coward 71484121


If you look at an aerial photo of the dam, the regular spillway is to the left of the dam itself. To the left of the spillway, you will see a concrete 'apron' that is the emergency spillway. Below the emergency spillway, you will also see roads and structures that would be destroyed if the emergency spillway ever comes into use.
What the Hell?...
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
So it's been raining non stop there?
 Quoting: Astral Goat


Just a brief lull today, much more rain forecast the next 3 days! Flooding everywhere...our little creek is a raging river!
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02/07/2017 08:18 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
...


The overflow spillway, which is really only the safe way to release excess water...
Otherwise erosion will occur rapidly leading to possible MAJOR STRUCTURAL FAILURE
hiding
 Quoting: Anonymous Coward 71484121


Oroville Dam has a regular spillway, which is the one that failed today. It has gates that can be opened or closed to control the spillway flow.

The dam also has an emergency spillway, which is basically a concrete 'spout' that in theory, would allow water to overtop the dam without causing erosion or structural damage to the dam (since it is an earth-fill dam). Since the emergency spillway has no means of controlling the flow of water, damage downstream could be considerable.
 Quoting: Crunch62


Oh, ok. That is good news then. I wasn't aware of a second 'emergency' spillway.
 Quoting: Anonymous Coward 71484121


If you look at an aerial photo of the dam, the regular spillway is to the left of the dam itself. To the left of the spillway, you will see a concrete 'apron' that is the emergency spillway. Below the emergency spillway, you will also see roads and structures that would be destroyed if the emergency spillway ever comes into use.
 Quoting: Crunch62

Hmmm...
Well it seems they better prepare to use this...don't see any way around it now...
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Karma for all the Hillary votes.

Shame.
 Quoting: TheTruthMonger™


I hate democrats as much as the next guy, but central California is red as it gets.

Try to focus your energy on hoping for 9.9 for San Francisco or better yet, Los Angeles.
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
you'd think they could just chopper in some cement and patch it good enough till something better can be done
 Quoting: Anonymous Coward 23557933


Take a look at how DEEP that hole is from the one picture on the news link I posted above and here.

Then look at how much of the spillway has been ripped away!

This is DAM (NO pun intended) SERIOUS SHIT!!


[link to ww2.kqed.org (secure)]

-----------------

this thread NEEDS a definite pin ... at least until they can get things stabilized there.

PLEASE REQUEST A PIN !!


This is the tallest dam in the US ... and it is in REAL, not made up, TROUBLE!!

 Quoting: Anonymous Coward 52154903


Odd. With clear erosion along the side of the spillway you would think they should have known about this before it became a large problem.
Have a nice day = GFY. GFY = Go Fuck Yourself. If this offends you then have a nice day.
the redeemable furry pete

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
you'd think they could just chopper in some cement and patch it good enough till something better can be done
 Quoting: Anonymous Coward 23557933


Take a look at how DEEP that hole is from the one picture on the news link I posted above and here.

Then look at how much of the spillway has been ripped away!

This is DAM (NO pun intended) SERIOUS SHIT!!


[link to ww2.kqed.org (secure)]

-----------------

this thread NEEDS a definite pin ... at least until they can get things stabilized there.

PLEASE REQUEST A PIN !!


This is the tallest dam in the US ... and it is in REAL, not made up, TROUBLE!!

 Quoting: Anonymous Coward 52154903


Odd. With clear erosion along the side of the spillway you would think they should have known about this before it became a large problem.
 Quoting: Carnac


they probably did
"It's a friendly friendly world" (Andy Kaufman)
Calm seas do not a sailor make,
Nor easy horses, a horseman.
And Jesus was a sailor when he walked upon the water And he spent a long time watching from his lonely wooden tower and when He could be certain only drowning men could see Him- Leonard Cohen
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02/07/2017 08:23 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Updated info on how much water they can spill via the Hydro Power Plant ... I was WAY off above.

The Hydro Power Plant can ONLY spill out 5000 cfs of water(cubic feet per second) even as inflows into the lake are running about 130,000 cubic feet per second
 Quoting: Anonymous Coward 52154903


I know there are 'river valves' in the base of the dam, but don't know if they are separate from the power plant flow.

I know one of these valves was damaged several years ago and read recently it still has not been repaired.
 Quoting: Crunch62


A malfunction and resulting accident occurred with the RVOS in 2009, however, which resulted
in significant restrictions being placed on its operation. At this time, through agreement with the
California Division of Occupational Safety and Health and others, the RVOS is approved for
limited operations during the current (2015-2016) drought emergency. DWR is working with dam
safety regulatory agencies and others toward a long-term solution for using the RVOS, which is
intended to restore the full original design capacity of 4,000 cfs at lake elevation 640’ for the
RVOS.
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02/07/2017 08:28 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Karma for all the Hillary votes.

Shame.
 Quoting: TheTruthMonger™


I hate democrats as much as the next guy, but central California is red as it gets.

Try to focus your energy on hoping for 9.9 for San Francisco or better yet, Los Angeles.
 Quoting: Anonymous Coward 6408666

And N. Cali is even redder...most all the counties North of the capital signed up to secede from Cali and form the 'Great State of Jefferson'..

[link to stateofjefferson.com]
Crunch62

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02/07/2017 08:32 PM

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
you'd think they could just chopper in some cement and patch it good enough till something better can be done
 Quoting: Anonymous Coward 23557933


Take a look at how DEEP that hole is from the one picture on the news link I posted above and here.

Then look at how much of the spillway has been ripped away!

This is DAM (NO pun intended) SERIOUS SHIT!!


[link to ww2.kqed.org (secure)]

-----------------

this thread NEEDS a definite pin ... at least until they can get things stabilized there.

PLEASE REQUEST A PIN !!


This is the tallest dam in the US ... and it is in REAL, not made up, TROUBLE!!

 Quoting: Anonymous Coward 52154903


Odd. With clear erosion along the side of the spillway you would think they should have known about this before it became a large problem.
 Quoting: Carnac


The spillway hasn't been used very much in recent years. DWR has generally supplied water downstream to fulfill contracts long before the lake level was high enough to even use the spillway.

I think the erosion seen next to the spillway is the result of water splashing out of the hole created today.
What the Hell?...
fred also

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02/07/2017 08:33 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Where's the terminator when you need him?

Oh, on reality tv
catfilenails
Crunch62

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02/07/2017 08:34 PM

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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Updated info on how much water they can spill via the Hydro Power Plant ... I was WAY off above.

The Hydro Power Plant can ONLY spill out 5000 cfs of water(cubic feet per second) even as inflows into the lake are running about 130,000 cubic feet per second
 Quoting: Anonymous Coward 52154903


I know there are 'river valves' in the base of the dam, but don't know if they are separate from the power plant flow.

I know one of these valves was damaged several years ago and read recently it still has not been repaired.
 Quoting: Crunch62


A malfunction and resulting accident occurred with the RVOS in 2009, however, which resulted
in significant restrictions being placed on its operation. At this time, through agreement with the
California Division of Occupational Safety and Health and others, the RVOS is approved for
limited operations during the current (2015-2016) drought emergency. DWR is working with dam
safety regulatory agencies and others toward a long-term solution for using the RVOS, which is
intended to restore the full original design capacity of 4,000 cfs at lake elevation 640’ for the
RVOS.
 Quoting: Anonymous Coward 70725803


So a net gain of only 4,000 CFS release, even if they could make it operable? That isn't going to help.
What the Hell?...
JustJuls

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02/07/2017 08:35 PM
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
Rumor among the locals that stopping the spill way could potentially cause damage to the levee system.

Levees contact or expand depending on water levels. When the water level is high and they want to lower it. They do so over a period of time to allow levee to adjust.

Levees are currently full or filling up. With the spill way stopped water levels downstream in some of the levee systems may drop dramatically with out time to adjust. Potentially comprising the levees.

Don't know how accurate this is but anyone familiar with the Sacramento Valley knows how important the levee systems are.
Just being in the moment. :)
the deplorable catnahalf
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
I'm about 15 miles downstream from the dam. CA DWR has been trying to maintain the elevation at around 850 feet (crest elevation is 900') for flood storage.

Even with the previous 50K CFS releases, the lake rose almost 10 feet in the past 24 hours. With the spillway shut down, it will rise even faster. Currently at 858 feet. 42 feet to go.

I'm having flashbacks to 1997, when they thought the dam was going to be overtopped by excessive inflow. It wasn't a fun time.
 Quoting: Crunch62


Lived in Sacramento for years. They have some truly stupid people in charge. If I was you I'd take a vacation starting now.
 Quoting: the redeemable furry pete


Pack up and move upstream for a nice camping trip.
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Re: California's Lake Oroville Main Spillway Severely Damaged/Eroded. Oroville Dam's Recently Reconstructed Main Spillway Fundamentally Flawed
They quote an official here

[link to www.kcra.com]

"About 200 to 300 feet of the spillway itself has eroded away, it's just gone. And that's of course of great concern," DWR information officer Doug Carlson said. "We could let the water flow down the spillway, and continue to erode the base of it. That's preferable to allowing the water to get too high in the dam."

So it sounds like they are reluctant to use the emergency spout.
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