CA - ‘Uncharted territory’ as Lake Oroville rises toward damaged dam

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Still can't get any readings from their web page?

Can not be that they dont know.

Hacked?

Monitoring system error their end?

Deliberate?



[FONT=proxima_nova]According to the [/FONT]U.S. Drought Monitoroffsite link[FONT=proxima_nova], issued today, the geographic extent of drought in the state dropped from 73 percent three months ago to eight percent this week, due to near-record precipitation from a series of powerful winter storms. Also, in February, only three percent of the contiguous U.S. saw severe to exceptional drought, the lowest level in seven years.

[/FONT]http://www.noaa.gov/media-release/spring-outlook-risk-of-major-flooding-in-north-dakota-moderate-flooding-in-idaho
 
CARIIS said:
[FONT=proxima_nova]According to the [/FONT]U.S. Drought Monitoroffsite link[FONT=proxima_nova], issued today, the geographic extent of drought in the state dropped from 73 percent three months ago to eight percent this week, due to near-record precipitation from a series of powerful winter storms. Also, in February, only three percent of the contiguous U.S. saw severe to exceptional drought, the lowest level in seven years.

[/FONT]http://www.noaa.gov/media-release/spring-outlook-risk-of-major-flooding-in-north-dakota-moderate-flooding-in-idaho
Click to expand...

Great link, CARIIS.

Since January 3, 2017... amazing... looking good, California!

20170103_ca_DM.jpg20170207_ca_DM.jpg20170314_ca_DM.jpg

Note that the Drought Monitor classification scheme is based primarily upon the Palmer Drought Severity Index (PDSI), soil moisture, streamflow data, precipitation, and another metric, called the Objective Drought Indicator Blend (which sounds like a coffee or a retirement fund), not sure what that one is all about.

http://droughtmonitor.unl.edu/AboutUs/ClassificationScheme.aspx
 
CARIIS said:
Does anyone remember if there was ever a cfs estimate when the emergency spillway overtopped?

Thinking well maybe if the main spillway craps out, and the only answer till dry season is going to be that one, now that it is shored up that might be ok?

Anyone thoughts?
Click to expand...

Here is a nice synopsis. http://www.water.ca.gov/oroville-spillway/pdf/2017/Lake Oroville events timeline.pdf

Looks like it was about 65,000 cfs on February 11 at about 8pm when the auxiliary spillway began discharging. Stage would have been 901 feet amsl plus.
 
watergirl62 said:
Great link, CARIIS.

Since January 3, 2017... amazing... looking good, California!

attachment.php
attachment.php
attachment.php


Note that the Drought Monitor classification scheme is based primarily upon the Palmer Drought Severity Index (PDSI), soil moisture, streamflow data, precipitation, and another metric, called the Objective Drought Indicator Blend (which sounds like a coffee or a retirement fund), not sure what that one is all about.

http://droughtmonitor.unl.edu/AboutUs/ClassificationScheme.aspx
Click to expand...

I will take a cup of Folgers here at Sunny Day Senior Home!!

Shame on me !!
 
Caution: A mini (mini IMO at least!) rant emerged!

PLs, help! I am dying to know if any of you saw news coverage about Sacramento when it happened? Maybe I was too absorbed in this mess - I just want to know - did they cover it.

A %dmn dam actually broke - how on earth is that not newsworthy??

Their public airwaves, they belong to us. News primary obligation is keep citizens informed. Sorry, but if I was out there, I think, I am being reasonable if I want to know if my dog and I are going to drown today. I just think that is fair and right.

Am I being drama eee IMO no. Reporters, the general station manager, editors etc etc all live there - how on earth, for their own families do they not kinda what to know what is happening. They will drown. How is that not of interest?.

It boggles me. The global implications of that thing crashing down are unreal - cable news has not done it, the white house has not done it.

Far more important, IMO, of what Trump forgot he said 48 hours ago- that has just got repetitive.Ya Know what it is? - there is no death count- ain't that a sad implication of society.

MOO this has should have been in the first 15-minute block of every newscast since the beginning. Up to today. Period.

There not keeping people out there on their toes. I know it's a secret (!) but I have followed this intensely! A lot of my worldview on this, I think is influenced by my decade's long interest in aviation.

Very familiar with the notion of fatigue! Metal fatigue, or dam fatigue same thing. Structures under intense stress for long periods of time --FAIL. Not really that new an idea.

How it works. On anything moo

I cannot grasp the local tv outlets in that region, in the morning assignment meeting, MISSING the tallest dam in the USA falling apart, not a news story. Literally falling apart.

Call me dramatic - fine- they have been spending 4.7 million a day (linked earlier) so I just don't feel that I am really off here. MOO

Ok, I should stop.Its the same thing with Raleigh fire- little update. It was the biggest fire in that cities history since like 1920. How does that not merit follow-up? Like causation would be nice? You guys sent ATF out there, so again, I don't think I am being crazy.

Ah ha, we go back to death count again don't we?

OK I stop for real

URRRRRRRRRRRRRRRRRRRRRRRRRRRRR!

.
 
CARIIS, what happened in Sacramento? That dam break you mentioned in #439 happened in northeast Nevada, near Utah, not California. It's raining again, don't know though if it's a pineapple express storm (AR to you), quite a bit rain. Went to Bear Valley, south of Tahoe, on the weekend to see the snow. Lots of snow but since I've never been there before don't know how it compares to other years.
 
Oh! I saw video of a dam messing up ! I thought it was Sacremtno I was so blown away not remember seeing any of it that took me away from the details!!

TY for clearing me up!
 
[FONT=&amp]
Oroville and Shasta Dam/Inflow have tripled .
[/FONT]
In flow has been catching up with outflow the past 12 hours - in one hour exceeded it.

Actual result - pretty much nothing - unit has remained at 848 for about the last 36 hours- they are unable to lower it at this point. with the rain.

Outlook:
May rain a little today
Break Tomm
Friday a wreck 100% rain
Sat may rain a bit
Sun rain

Warmer air and additional rain are melting the snow in the mountains of CA. Watch for Evacuation Notices.

Shasta dam - for the last 8 hours their outflows have plummeted (?) and have been at around 2500 hundred only - while inflows are around 35000 ?


I do not understand why they would drastically reduce outflow while inflow has tripled in 24 hrs?

This one looks the worse:

San Luis Reservoir, CA This one has risen 192 ft in 7 months and is at 99%

Unlike Oroville and other reservoirs that filled in chaotic and violent ways over the past three months as atmospheric rivers drenched California, San Luis was filled like a bathtub — very carefully — right to the top

neat dictionary of terms:
https://www.des.nh.gov/organization/commissioner/pip/factsheets/db/documents/db-1.pdf


What a pretty pic before the mess. I found it helpful in terms of seeing where the power plant at the right is!



California_Department_of_Water_Resources.jpg
 
officials with the state Department of Water Resources, which operates Lake Oroville -- the site of the nation's tallest dam and California's second-largest lake -- fear a huge rupture that opened in the main spillway could expand to cripple the flood gates that send out controlled releases of water and keep water from spilling over uncontrollably.

[FONT=&quot]Chico State University construction management professor Chris Souder [/FONT][FONT=&quot] wanted to take his college students to show them what their future careers might entail, but the Department of Water Resources wouldn’t allow it.[/FONT][FONT=&quot]

[/FONT]

http://www.kcra.com/article/northern-california-may-face-significant-risk-from-oroville-dam/9170300
 
CARIIS said:
officials with the state Department of Water Resources, which operates Lake Oroville -- the site of the nation's tallest dam and California's second-largest lake -- fear a huge rupture that opened in the main spillway could expand to cripple the flood gates that send out controlled releases of water and keep water from spilling over uncontrollably.

[FONT=&quot]Chico State University construction management professor Chris Souder [/FONT][FONT=&quot] wanted to take his college students to show them what their future careers might entail, but the Department of Water Resources wouldn’t allow it.[/FONT][FONT=&quot]

[/FONT]

http://www.kcra.com/article/northern-california-may-face-significant-risk-from-oroville-dam/9170300
Click to expand...
I think they are going to have to plan this out in phases with short-term milestones. What CAN be done by fall? Etc...

However, the problem with prolonging the time frame is that costs increase while the public memory and sense of urgency decline. Not an ideal combo.

MOO [emoji202]
 
Strange one would think you would not wanna be making drastic changes to messed up structures??

jspplotservlet
 
New Video in the beginning!



https://www.youtube.com/watch?v=yBxzb-sa0WA








If this does not look like the water is coming up !!

[video=youtube;drXj6L2Wn4w]https://www.youtube.com/watch?v=drXj6L2Wn4w&index=3&list=PLzNHIMOfjRjKbDB-bkaVHJu4natK8hzHA[/video]
 
Check out all the aerial pictures of the snow in the Sierra.

https://www.nytimes.com/interactive/2017/03/22/us/california-measuring-snowpack.html?src=recg&_r=1

Knowing with precision how much snow has accumulated is crucial for farmers and water managers.

That’s where a mapping project at NASA's Jet Propulsion Laboratory known as the Airborne Snow Observatory comes in. Using measurements gathered by specialized instruments on a plane, scientists have been able to gain an unprecedented understanding of the amount of water present in the Sierra’s snow.

-------------
A geography lesson. Sierra is plural. We're sensitive about that and I always try to correct myself and use the proper form.

http://thehighsierra.org/sierra_or_sierras.htm

The Sierra Nevada is distinctly a unit, both geographically and topographically, and is well described as "una sierra nevada." Strictly speaking, therefore, we should never say "Sierras," or "High Sierras," or "Sierra Nevadas" in referring to it. Nevertheless, these forms are so frequently found in the very best works of literature and science that it would perhaps be pedantic to deny their admissibility. It becomes, therefore, a matter of preference, and for our part we rather like to keep in mind the unity of our great range by calling it simply "The Sierra" or "The Sierra Nevada."
 
Spillway off

[video=youtube;3Tcf9jXoS6Q]https://www.youtube.com/watch?v=3Tcf9jXoS6Q[/video]
 
JB 3/24/17 update. 15 minute tour of Feather Basin upper watershed lakes and spillways, investigative correspondence spearheaded by public and private sectors of Oroville failure, and a discussion of proposed spillway fixes.

He has some doc links in the comments.

https://youtu.be/4gnOziaifIY

Catching up again. [emoji571]

Sent from my LG-H740 using Tapatalk
 
CARIIS said:
New Video in the beginning!



https://www.youtube.com/watch?v=yBxzb-sa0WA








If this does not look like the water is coming up !!

[video=youtube;drXj6L2Wn4w]https://www.youtube.com/watch?v=drXj6L2Wn4w&index=3&list=PLzNHIMOfjRjKbDB-bkaVHJu4natK8hzHA[/video]
Click to expand...
This is very cool. Love the design. All those little telescoping ledges are hydraulic jumps, which decrease the velocity of moving water. The big blocks at the end of the Oroville primary spillway are also hydraulic jumps which are there to slow the water down to minimize erosion.
 
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