Posted on 02/12/2017 4:26:47 PM PST by janetjanet998
Edited on 02/12/2017 9:33:58 PM PST by Admin Moderator. [history]
The Oroville Dam is the highest in the nation.
Yes. People in general and those who have worked hard to enter a profession like in the field of engineering or science, want to contribute and do a stellar job. My issue is the bigger the government, 1) the more corrupt, and 2) the harder for individuals to do a good job.
Thanks for the reply, plus your very valuable information and analysis.
looks like they got a 2nd generator going
outflow now 2300
Excellent. 2 generators.
I wish that the plant could move more water, like about 30-50 thousand cf/s.
Sacramento Bee article about generators...
http://sacramento.cbslocal.com/2017/03/03/1-of-6-turbines-restarted-at-oroville-dam/
As noted in the “sandbagged wall” image, 1 of the 6 is out of service. That might explain the discrepancy between the published cfm and the 14,500 that they expect to achieve at the plant. They expect to reach 3000 cfm by the end of the day.
the pattern has the potential to turn very wet again about a week from now
this weekend a cool moderate storm
of course thy will have to use the main spillway again..there is no “if” about it
I wonder what substance they can spray on that huge hillside to prevent Erosion or is it just BS?
also they admitted the obvious..... things won’t be back to normal next year either
As the spillway is reinforced and the situation gets less dire, engineers will begin transitioning from the emergency response to planning a permanent fix, Croyle said. It will likely take several weeks for officials to develop options for a long-term solution, which may include a temporary fix for next winter.
I don’t know what they can spray on the hillside to prevent erosion. Seems to me, that area right were the good section of the spillway ends is VERY vulnerable, and the first transmission line tower is vulnerable.
As it will take a while to get the spillway fixed, a very long while, I would think that they would want a spillway contingency plan so that they can use what’s left of what they have now until they at least get through the melt season.
I readily admit that I don’t know what all they have up their sleeve, but I see a coming situation where incoming exceeds outgoing for a while and they’ll HAVE to use the spillway again.
Thanks for the link, JJanet. Shotcrete is basically concrete. I wonder if they’re going to use rocks also, or just the concrete. If they harden the area below the spillway, they can probably flow some water with very little erosion because they’re down to bedrock in a lot of that path.
His concern about eroding under the spillway at low flow levels is very valid. When they dropped to 30,000 the other day, it started pushing mud looking water down the hill again. Which means that it was undermining the end of the spillway.
Good video.
Info on snowpack
http://www.freerepublic.com/focus/f-news/3531286/posts?page=1#1
H/t Ernest_at_the_beach
Here is one possibility.. It's a technique where mesh is bolted up above in hold points with the mesh draping over the rock face. Then they "shotcrete" the rock & mesh. I don't know if I'd volunteer to bolt the mesh under those overhanging slabs..
Thanks for that image. It says what a thousand words could not!
River bank concerns downstream from the Dam. Apparently, the abrupt reduction of water has caused some river banks to collapse due to the lack of water pressure holding up the wet ground.
From your link:
When state water officials scaled back their mass dumping of water from the damaged Oroville Dam this week, they knew the riverbed below would dry up enough to allow the removal of vast piles of debris from the fractured main spillway.
But they apparently did not anticipate a side effect of their decision to stop feeding the gushing Feather River a rapid drop in river level that, according to downstream landowners, caused miles of embankment to come crashing down.
With high water no longer propping up the shores, the still-wet soil crashed under its own weight, sometimes dragging in trees, rural roads and farmland, they said.
The damage is catastrophic, said Brad Foster, who has waterfront property in Marysville (Yuba County), about 25 miles south of Lake Oroville.
UNFREAKINBELIEVABLE! !!!
The damage may be more catastrophic if the powerhouse spillways are not operating. Every drop of water through the powerhouse is one less to go down the main spillway, which is in a precarious state.
outflow at ZERO again
unconfirmed............
hearing reports on social media that part of the mountain side gave way and caused the powerplant to fill with debris
the are trying to clear it
0 outflow at this time
they sent divers into the lake side of the main spillway to seal the leaks..I assume if they open it again it will have to be resealed...or can it even be opened sealed?
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