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Posted: 2/12/2017 2:59:38 PM EST
[#1]
Rough ass guess - 100,000 cubic yards of concrete to replace the spillway.
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Posted: 2/12/2017 2:59:54 PM EST
[#2]
Quote HistoryQuoted:
Closely zoomed in (and therefore shakey) video of the Espillway. Looks like a lot of scouring took place on the bare ground and bedrock is exposed in many places on the hillside. The runoff is a lot cleaner than yesterday and a pretty good channel has been cut going down the hill. It looks like the water it running on bedrock most of the way down now. https://www.youtube.com/watch?v=mQkVr98xai0&feature=youtu.be#t=32.36625 |
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Posted: 2/12/2017 3:00:31 PM EST
[#3]
Quote HistoryQuoted:
they were cut going across the spillways and across river They made it sound as if those were a separate thing from the powerhouse and not needed for operation. |
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Posted: 2/12/2017 3:02:07 PM EST
[#4]
Video is up!
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Posted: 2/12/2017 3:02:20 PM EST
[#5]
Quote HistoryQuoted:
I still don't understand why the turbines couldn't just spin and let water through. Hell if thats true, I sure don't understand why they didn't put some non turbine outlets down there for emergency like this to release water. Because the turbines are hooked to these generator things. |
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Posted: 2/12/2017 3:03:32 PM EST
[#6]
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Posted: 2/12/2017 3:03:40 PM EST
[#7]
The e-spillway channel near the tower dumping into the river is HUUUGGGEE compared to yesterday. It looks like the right side of the regular spillway has eroded a ton too but I'll need to compare to a shot from yesterday.
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Posted: 2/12/2017 3:04:07 PM EST
[#8]
Quote HistoryQuoted:
sorta... not exactly... You can't run water through the turbines and generate power if you have no place to put it... The other functions of the dam... like lights... the controls for the spillway gates... need power which since the dam's powerhouse isn't functioning is being carried in by the powerlines which are still attached. Besides the above, the generators don't have permanent magnets like a small generator. They have field coils which must be energised first in order to produce electricity. I don't know if this power house has a permanent magnet generator to kick start the main generators or not. |
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Posted: 2/12/2017 3:05:00 PM EST
[#9]
here is the presser from yesterday
at ~12:30 he starts talking about the power house https://youtu.be/39m-60s9h6g  Failed To Load Title |
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Posted: 2/12/2017 3:06:21 PM EST
[#10]
Quote HistoryQuoted:
Besides the above, the generators don't have permanent magnets like a small generator. They have field coils which must be energised first in order to produce electricity. I don't know if this power house has a permanent magnet generator to kick start the main generators or not. Hell ya would think they would have some diesel generators in case they go black. |
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Posted: 2/12/2017 3:07:57 PM EST
[#11]
Looks like your feed boogered up. I did see that slip, and wow.
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Posted: 2/12/2017 3:10:26 PM EST
[#12]
Quote HistoryQuoted:
Looks like your feed boogered up. I did see that slip, and wow. Damn, I missed the start of that slip |
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Posted: 2/12/2017 3:10:40 PM EST
[#13]
ProFryan Live Feed
Periscope - https://www.periscope.tv/w/1mrGmeVBkqdGy YouTube - https://youtu.be/olWJrre59HQ Media Player - http://periscope-prod-us-west-1.global.ssl.fastly.net/vidmanlive/nRJ8NvUia4sak7ZrUuAwQ14ZT2tRdtIcnsqjfxLAAiHXw6CKMVR0ocUqJX47l0vPM7tyTBPNVpQ-rDsarxpctg/playlist.m3u8 |
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Posted: 2/12/2017 3:13:44 PM EST
[#14]
That dude working the heavy equipment ain't getting paid enough for when all that dirt just came loose.
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Posted: 2/12/2017 3:13:46 PM EST
[#15]
Massive land chunk broke off
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Posted: 2/12/2017 3:14:57 PM EST
[#16]
Thanks for the live stream op! This is the best thread on arfcom in a long time.
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Posted: 2/12/2017 3:15:01 PM EST
[#17]
Quote HistoryQuoted:
Massive land chunk broke off Back fell off! |
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Posted: 2/12/2017 3:15:02 PM EST
[#18]
Quote HistoryQuoted:
That dude working the heavy equipment ain't getting paid enough for when all that dirt just came loose. I bet his shorts are brown now too. |
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Posted: 2/12/2017 3:17:58 PM EST
[#19]
On the DWR presser on right now they explained why both sides of the river and the area around the diversion pool are needed.
They need to get down close to erosion zones and remove the sand and silt to lower the water levels so the power plant can come back online. That's probably a good reason to keep the area on lock down and keep the looky loos away. |
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Posted: 2/12/2017 3:18:20 PM EST
[#20]
Inflow back up to 51k
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Posted: 2/12/2017 3:18:55 PM EST
[#21]
Looks like from the power line near the river to the emergency spillway is 3728 feet away, just so you know OP.
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Posted: 2/12/2017 3:21:00 PM EST
[#22]
Any footage of the big chunk falling in? I missed it DAM!
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Posted: 2/12/2017 3:21:14 PM EST
[#23]
I am not sure how may of you are familiar with CA but there is a similar dam on Trinity lake. It has a smaller hole spillway from what i can tell. I don't see an emergency spillway like on Oroville Dam. What would happen at Trinity if its spillway also failed? I am guessing the possible inflow for Trinity is much less than Oroville. https://en.wikipedia.org/wiki/Trinity_Dam
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Posted: 2/12/2017 3:22:19 PM EST
[#24]
I think my YT stream may have caught it, you can rewind it.
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Posted: 2/12/2017 3:22:26 PM EST
[#25]
PGE is going to wait until the espillway flow stops to remove 2 of the transmission towers. Does the water take them first?
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Posted: 2/12/2017 3:23:03 PM EST
[#26]
OP has more peps on periscope than the DWR presser has.
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Posted: 2/12/2017 3:23:25 PM EST
[#27]
Quote HistoryQuoted:
Hell ya would think they would have some diesel generators in case they go black. Or just a small turbine with permanent magnets. |
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Posted: 2/12/2017 3:23:58 PM EST
[#28]
Quote HistoryQuoted:
I think my YT stream may have caught it, you can rewind it. How? |
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Posted: 2/12/2017 3:25:19 PM EST
[#29]
Quote HistoryQuoted:
Massive land chunk broke off Video? |
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Posted: 2/12/2017 3:27:23 PM EST
[#30]
Quote HistoryQuoted:
The e-spillway channel near the tower dumping into the river is HUUUGGGEE compared to yesterday. It looks like the right side of the regular spillway has eroded a ton too but I'll need to compare to a shot from yesterday. It did, and OP caught a UUUUGGGEEE earth erosion on the right side that crashed in the water. |
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Posted: 2/12/2017 3:27:31 PM EST
[#31]
Quote HistoryQuoted:
How? |
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Posted: 2/12/2017 3:28:53 PM EST
[#32]
Quote HistoryQuoted:
Use the slider at the bottom of the video. |
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Posted: 2/12/2017 3:29:41 PM EST
[#33]
Quote HistoryQuoted:
I still don't understand why the turbines couldn't just spin and let water through. Hell if thats true, I sure don't understand why they didn't put some non turbine outlets down there for emergency like this to release water. Running the turbines without an electrical load would overspeed them with even very low flow rates. Getting a turbine to, or past, it's critical speed would be spectacularly bad. They would be designed to come apart before they reach infinite energy (enough kinetic energy that if they came apart the fragments could not be contained by the structure) to avoid launching turbine parts into orbit. They will protect the turbines at nearly any collateral cost. Many of those parts are one offs built 50 years ago. |
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Posted: 2/12/2017 3:32:13 PM EST
[#34]
Quote HistoryQuoted:
I think my YT stream may have caught it, you can rewind it. Do you have a link? I'm having a problem with OPs stream on Periscope for whatever reason. |
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Posted: 2/12/2017 3:34:34 PM EST
[#35]
Quote HistoryQuoted:
Do you have a link? I'm having a problem with OPs stream on Periscope for whatever reason. Links are above a few post up. |
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Posted: 2/12/2017 3:35:12 PM EST
[#36]
having problems here also. Video feed keeps dropping out then I get these diagonal lines that slowly crawl across the screen.
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Posted: 2/12/2017 3:35:16 PM EST
[#37]
This thread has been the coolest thing on arfcom in recent memory. OP is a good guy.
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Posted: 2/12/2017 3:37:53 PM EST
[#38]
Quote HistoryQuoted:
Hell ya would think they would have some diesel generators in case they go black. Quote HistoryQuoted:
Quoted:
Besides the above, the generators don't have permanent magnets like a small generator. They have field coils which must be energised first in order to produce electricity. I don't know if this power house has a permanent magnet generator to kick start the main generators or not. Hell ya would think they would have some diesel generators in case they go black. Think synchronous motor. All most dams are doing is using head to spin very very very large synchronous motors.  Synchronous motor start 350 HP 2400 volt |
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Posted: 2/12/2017 3:38:22 PM EST
[#39]
Quote HistoryQuoted:
His video is very laggy, I cannot connect either. Links are above a few post up. Quote HistoryQuoted:
Quoted:
Do you have a link? I'm having a problem with OPs stream on Periscope for whatever reason. Links are above a few post up. Oh, I thought you were talking about your feed. I'm not too keen on listening to government nitwits bullshitting their way through a conference, but I do want to monitor the situation since I'm not up to anything today. |
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Posted: 2/12/2017 3:39:19 PM EST
[#40]
Quote HistoryQuoted:
having problems here also. Video feed keeps dropping out then I get these diagonal lines that slowly crawl across the screen. I wonder if he's catching interference from those power lines, or are they completely dead? |
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Posted: 2/12/2017 3:39:30 PM EST
[#41]
kept refreshing the periscope link and it came back up.
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Posted: 2/12/2017 3:40:30 PM EST
[#42]
OP is gonna have to restart his stream. If someone gets a chance tell him on his feed.
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Posted: 2/12/2017 3:40:34 PM EST
[#43]
Quote HistoryQuoted:
Running the turbines without an electrical load would overspeed them with even very low flow rates. Getting a turbine to, or past, it's critical speed would be spectacularly bad. They would be designed to come apart before they reach infinite energy (enough kinetic energy that if they came apart the fragments could not be contained by the structure) to avoid launching turbine parts into orbit. They will protect the turbines at nearly any collateral cost. Many of those parts are one offs built 50 years ago. I think some people do not realise that the generator is permanently mounted to the same driveshaft that the water turbine is permanently mounted to. It's a one piece system that cannot be decoupled. There is no way to adjust the speed of the shaft by braking. There is no way to have the shaft locked to zero rotation while allowing water to flow through it. |
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Posted: 2/12/2017 3:40:41 PM EST
[#44]
sabotage.
who said anything about sabotage!!!????? 
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Posted: 2/12/2017 3:40:48 PM EST
[#45]
Quote HistoryQuoted:
Here's a screenshot I just took from Wunderground for the weather forecast for Oroville, CA. Doesn't look too good in the immediate area. I'll check upstream next. http://www.ar15.com/media/mediaFiles/173545/Capture-145360.png USGS water data will give you the watershed area in square miles for the oroville dam. I don't have time right now but when I get home I'll pull it up on the laptop. |
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Posted: 2/12/2017 3:42:01 PM EST
[#46]
Quote HistoryQuoted:
Think synchronous motor. All most dams are doing is using head to spin very very very large synchronous motors.  https://www.youtube.com/watch?v=fNuI6keQXYAI just meant if they aren't running the turbines they could cover house load. When our plant trips we have 3 emergency diesels to cover house load while we bring up the main unit. I guess they could always just buy power from the grid. |
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Posted: 2/12/2017 3:42:09 PM EST
[#47]
Quote HistoryQuoted:
Besides the above, the generators don't have permanent magnets like a small generator. They have field coils which must be energised first in order to produce electricity. I don't know if this power house has a permanent magnet generator to kick start the main generators or not. |
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Posted: 2/12/2017 3:43:14 PM EST
[#48]
Is OP in a bad reception spot?
Also where is Simjedi's live stream for today (I must see the chunk fall in )
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Posted: 2/12/2017 3:44:09 PM EST
[#49]
Quote HistoryQuoted:
Typically with black start hydro plants they can use station batteries/inverter to flash the field of the generator to get the generator starting producing a given terminal voltage before the regular exciter is able to take over and control terminal voltage and reactive power. This particular plant apparently has no black start capability according to the press conference guy. Most hydro plants will also have a small house generator that can charge station batteries and keep min flow requirements met but these typically are not PMG type generators either and require field flashing/external exciter that is fed from the station batteries/inverter as well as the grid back feed into the plant. This info is based on my limited experience and is in no way shape or form to be construed as anything other than internet ramblings by the village idiot. Good info man thats exactly what I was talking about. |
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Posted: 2/12/2017 3:44:59 PM EST
[#50]
Quote HistoryQuoted:
Running the turbines without an electrical load would overspeed them with even very low flow rates. Getting a turbine to, or past, it's critical speed would be spectacularly bad. They would be designed to come apart before they reach infinite energy (enough kinetic energy that if they came apart the fragments could not be contained by the structure) to avoid launching turbine parts into orbit. They will protect the turbines at nearly any collateral cost. Many of those parts are one offs built 50 years ago. |
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