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Oroville dam

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Dutch Josh View Drop Down
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    Posted: February 13 2017 at 8:21am
http://earthquake.usgs.gov/earthquakes/eventpage/nc71105714#executive 

There was a quarry blast causing a M2.1 quake 7 km north of Oroville on february 8- 19.56 UTC

A few days later there was http://edition.cnn.com/2017/02/13/us/california-oroville-dam-spillway-failure/index.html Proberbly the quarry blast had nothing to do with the water-system "problems" causing the evacuation of 200.000 people ? (Just a question)

Finally, the reason for the scramble to fix the dam is because a new storm system is forecast for later this week put water officials on a race against time. Bill Croyle, the acting director of the state Department of Water Resources, said they planned to continue discharging flows at a rate of 100,000 cubic feet per second, with the hope of lowering the reservoir level by 50 feet.

The biggest concern was that a hillside that keeps water in Lake Oroville — California’s second largest reservoir — would suddenly crumble Sunday afternoon, threatening the lives of thousands of people by flooding communities downstream. With Lake Oroville filled to the brim, such a collapse could have caused a “30-foot wall of water coming out of the lake,” Cal-Fire incident commander Kevin Lawson said at a Sunday night press conference. Luckily, so far this scenario has not played out.


Three environmental groups — the Friends of the River, the Sierra Club and the South Yuba Citizens League — filed a motion with the federal government on Oct. 17, 2005, as part of Oroville Dam’s relicensing process, urging federal officials to require that the dam’s emergency spillway be armored with concrete, rather than remain as an earthen hillside.

The groups filed the motion with FERC, the Federal Energy Regulatory Commission. They said that the dam, built and owned by the state of California, and finished in 1968, did not meet modern safety standards because in the event of extreme rain and flooding, fast-rising water would overwhelm the main concrete spillway, then flow down the emergency spillway, and that could cause heavy erosion that would create flooding for communities downstream, but also could cause a failure, known as “loss of crest control.”

Que sera, sera, Whatever will be, will be, The future is not ours to see, Que sera, sera !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 13 2017 at 12:37pm
Magnitudeuncertainty2.1 md± 0.2
Locationuncertainty39.581°N 121.551°W± 2.3 km
Depthuncertainty-0.2 km± 31.6
Origin Time
Number of Stations5
Number of Phases5
Minimum Distance5.3 km (0.05°)
Travel Time Residual0.04 s
Azimuthal Gap264°
FE RegionNORTHERN CALIFORNIA (36)
Review StatusREVIEWED
CatalogNC (nc71105714)
Location SourceNC1
Magnitude SourceNC1
ContributorNC1

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Que sera, sera, Whatever will be, will be, The future is not ours to see, Que sera, sera !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FluMom Quote  Post ReplyReply Direct Link To This Post Posted: February 13 2017 at 12:53pm
Another reason NOT to live in California, floods, earthquakes, mudslides (from the floods), fire, and failing dams.

Oh, I forgot about the liberal actors...hee hee hee!
Always Be Prepared
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 13 2017 at 10:03pm
http://www.zerohedge.com/news/2017-02-13/oroville-dam-drains-problem-remains-leaving-evacuees-limbo

While the lack of deterioration is good news, the LA Times has released the following map showing the areas which are still at risk of flooding near Lake Oroville.


And in addition to the threat of the upcoming rains, a residual risk with the emergency spillway is that the erosion from the overflowing water may erode the earth by the dam, destabilizing the structure. According to AP, the erosion at the head of the emergency spillway threatens to undermine the concrete wall and allow large, uncontrolled releases of water from Lake Oroville. Those flows could overwhelm the Feather River and other downstream waterways and levees and flood towns in three counties.

Department engineer and spokesman Kevin Dossey told the Sacramento Bee the emergency spillway was rated to handle 250,000 cubic feet per second, but it began to show weakness Sunday after flows peaked at 12,600 cubic feet per second.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 14 2017 at 10:00pm
http://www.pk-weirs.ulg.ac.be/?q=system/files/Chanson.pdf Apdf-file Queensland University Australia on dam failures in the past. 

http://www.zerohedge.com/news/2017-02-14/oroville-dam-evacuation-order-lifted-residents-allowed-return-water-level-drops A 12ft /3.6m drop with the maximum 901ft/275meter does not sound very safe with new storms on their way (also snow melt a problem ?) and the spillway-failure being clear. http://www.accuweather.com/en/us/oroville-ca/95965/weather-warnings/331994

A major collapse does not stay at the location of the incident but goes all the way in the watersystem both downstream flooding AND upstream sudden waterdrop. Did I get it correct the US has something close to 30.000 dams ?

https://www.youtube.com/watch?v=p_5udzKfLQM&app=desktop On the construction of the Oroville Dam.


USGS:
  1. 1.0

    4km NW of Oroville East, California

    2017-02-14 10:56:01 (UTC)

  2. 0.8

    4km NNW of Oroville East, California

    2017-02-14 10:39:52 (UTC)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 18 2017 at 12:15am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 21 2017 at 9:38pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jacksdad Quote  Post ReplyReply Direct Link To This Post Posted: February 21 2017 at 10:24pm
Originally posted by Dutch Josh Dutch Josh wrote:

Did I get it correct the US has something close to 30.000 dams ?


Believe it or not, it's apparently 84,000 - although only 8,100 are classed as major dams.

https://en.wikipedia.org/wiki/List_of_dams_and_reservoirs_in_United_States

Off topic but interesting nonetheless, this website explains the negative impacts that dams can have on a river system.

http://damnationfilm.com/faq



"Buy it cheap. Stack it deep"
"Any community that fails to prepare, with the expectation that the federal government will come to the rescue, will be tragically wrong." Michael Leavitt, HHS Secretary.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 23 2017 at 12:03am
Thank you jacksdad,

If those 84.000 dams would require 10.000$ each per year for maintenance (just a number) you can put another 0000 behind the 84.000=840.000.000 $ per year for keeping the dam, and system around it functioning. When politics do not want to raise tax how you will finance that ? 


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Post Options Post Options   Thanks (0) Thanks(0)   Quote DeepThinker Quote  Post ReplyReply Direct Link To This Post Posted: February 23 2017 at 11:03am
Originally posted by Dutch Josh Dutch Josh wrote:

Thank you jacksdad,

If those 84.000 dams would require 10.000$ each per year for maintenance (just a number) you can put another 0000 behind the 84.000=840.000.000 $ per year for keeping the dam, and system around it functioning. When politics do not want to raise tax how you will finance that




I don't know... maybe they could spend the money they do get more wisely?   There is absolutely no lack of government funds.   
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: February 23 2017 at 12:53pm
DeepThinker, http://damnationfilm.com/faq Puts questionmarks in the wisdom of building dams in the first place. Interesting points-I always believed hydro-power was-within limits-a good thing. 

But on this forum you can learn and see things from a different corner-that is one of the things I like from AFT. 

You (also) live in California-you need dams for drinkingwater ? The alternative is moving a lot of people ? Climatechange is making already existing problems even larger.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DeepThinker Quote  Post ReplyReply Direct Link To This Post Posted: February 23 2017 at 1:25pm
Yes Dutch_Josh I agree dams do have a tremendous ecological impact that is often underappreciated.   My comment was simply there is no lack of funds just a lack of priorities.   Maybe the government should pay for the important stuff first.   Then raise taxes if everybody agrees to fund less important stuff.  

I am sick an tired of hearing the need for tax raises for roads, schools, fire, police and now damns.     There is PLENTY of money to fund those things.    We like to give all are money away our money for stupid programs and neglect the thing Government is supposed to.

A perfect example.... when Regan was Governor the state spent over 10% on in infrastructure, now we spend maybe a percent or two.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: March 02 2017 at 2:53am
http://www.zerohedge.com/news/2017-03-01/dramatic-aerial-footage-shows-what-oroville-dam-looks-now On Monday the California Department of Water Resources stopped the flow of water down the spillway so that they could assess the damage. Here’s what they found:https://www.youtube.com/watch?v=UyvDPt-HU3g">https://www.youtube.com/watch?v=UyvDPt-HU3g

httpsww.youtube.com/watch?v=UyvDPt-HU3ghttps://www.youtube.com/watch?mmmmv=UyvDPtHU3g
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dutch Josh Quote  Post ReplyReply Direct Link To This Post Posted: March 03 2017 at 10:00pm
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