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Link Posted: 2/11/2017 11:17:04 PM EST
[#1]
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Quoted:
I'm trying to give a picture of the underwater topography, not on the spillway side. 
https://www.youtube.com/watch?v=W9YUKbHt6B4
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cool... although he confused the Spillway and Hydroelectric intakes...
Link Posted: 2/11/2017 11:17:48 PM EST
[#2]
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It is just the battery voltage of the sensor suite.  Many have a solar panel as well for charging the battery and powering the unit during the day like what is pictured.

http://www.schuylkillcenter.org/blog/wp-content/uploads/2015/07/CanalSense.jpg
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Nice to see the increase tapering off.
Voltage back down to nominal too!


What does the voltage represent and what is the acceptable "nominal" range?


Hell if I know!

It is just the battery voltage of the sensor suite.  Many have a solar panel as well for charging the battery and powering the unit during the day like what is pictured.

http://www.schuylkillcenter.org/blog/wp-content/uploads/2015/07/CanalSense.jpg


I gotta get me one of them!
Link Posted: 2/11/2017 11:17:59 PM EST
[#3]
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Starting Wednesday night and the following 10-14 days do not look favorable as far as rain predictions go. If they get hit again like this last thursday your looking at possibly 190k cfs coming into that dam again.
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https://pbs.twimg.com/media/C4bfFOoVcAUTAyr.jpg


Isn't that watershed supposed to get a whole bunch of rain starting early next week ?


Starting Wednesday night and the following 10-14 days do not look favorable as far as rain predictions go. If they get hit again like this last thursday your looking at possibly 190k cfs coming into that dam again.

It will be a MINIMUM 190k cfs coming next friday/saturday. Minimum....
Link Posted: 2/11/2017 11:18:02 PM EST
[#4]
Video of runoff


<iframe width="560" height="315" src="Gchf6COGAKQ" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/watch?v=Gchf6COGAKQ




Lake Oroville Spillway aerial footage 2-11-2017 12:00PM
Link Posted: 2/11/2017 11:18:52 PM EST
[#5]
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Quoted:
So now you are no longer saying it a fuse plug that is designed to fail on first use but rather a weir that is designed for multiple use and not to fail until it's design flow rate of 250k cfs is exceeded?  And that it is not designed to fail as plan A but if it does fail as plan b then the bedrock will save a complete failure?  Well that's pretty much what I said I thought it was. 

Still, I'd like to know how it was really designed instead of listening to someone who guesses about it, presents their guess as a fact and then changes their guess later on to another guess after several people point to facts that argue against your first guess being correct.
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you are looking at a trickle right now, try thinking of 10x or more water, 300,000 - 500,000 cfs flowing over that and tell me about its designed as a weir features, of course it is built to function as a weir until the shtf big time then it sacrifices to save the dam.
So now you are no longer saying it a fuse plug that is designed to fail on first use but rather a weir that is designed for multiple use and not to fail until it's design flow rate of 250k cfs is exceeded?  And that it is not designed to fail as plan A but if it does fail as plan b then the bedrock will save a complete failure?  Well that's pretty much what I said I thought it was. 

Still, I'd like to know how it was really designed instead of listening to someone who guesses about it, presents their guess as a fact and then changes their guess later on to another guess after several people point to facts that argue against your first guess being correct.
I only repeated other info given in this thread, yes I am guilty of saying the plug word. I never implied it was a single use item or that it would even fail under 10 feet of overflow. I just know that overflow of too much cfs is bad and will eventually find a weak spot somewhere. As a fact I stated that there is no theoretical limit to the capacity of the Espill.

I grew up fishing under a dam in AZ and am well aware of the mechanics of the spillways and hydraulic pressure in those things. Ours had a huge bypass pipe that usually had a couple feet oozing out, once they opened it up and it shot a 16 foot stream a half mile away into a hillside.
Link Posted: 2/11/2017 11:20:49 PM EST
[#6]
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CA is 400 Billion in debt. How does that happen? The dams are maintained by federal dollars but we neglected infra structure the last 8 years.
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Not apologizing for Moonbeam being a first class cunt, but the emergency relief funds request is for flooding in 34 counties and not this particular incident as far as I can tell.

I agree the federal govt should withhold any and all funds until California obeys immigration laws.
CA is 400 Billion in debt. How does that happen? The dams are maintained by federal dollars but we neglected infra structure the last 8 years.


Ten million illegal aliens sure got their pay outs.  And sanctuary city status remains.
Link Posted: 2/11/2017 11:22:10 PM EST
[#7]
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It's interesting that they have decided to increase the primary spillway's flows back to 65,000 cfs.  I wonder if something about the emergency spillway's behavior is giving them concern.
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Well... it's flowing Around the the Emergency spillway, and also shooting up in between, so yeah, there might be a few things for them to be concerned about.
Link Posted: 2/11/2017 11:28:14 PM EST
[#8]
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Innout is pretty fuckin fantastic for a very affordable fast food joint
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Good AAR Mr Ryan !

Damn that menu is quite affordable, how are the burgers ???
(never had one)


Innout is pretty fuckin fantastic for a very affordable fast food joint
I hate OP right now. I want In n Out sofaking bad
Link Posted: 2/11/2017 11:28:56 PM EST
[#9]
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Haha...I said "one of"

It feels pretty deep when your floating in it waiting for the tow boat to circle back. 

Baikal is crazy deep and has some hard to believe percent of the worlds fresh water. 
Link Posted: 2/11/2017 11:30:07 PM EST
[#10]
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Quoted:


Well... it's flowing Around the the Emergency spillway, and also shooting up in between, so yeah, there might be a few things for them to be concerned about.
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None of the videos or pictures posted in this thread have shown water flowing Around the Emergency Spillway... so do please post your exclusive news worthy evidence.


In case you were unaware... The Emergency Spillway runs the length of the parking lot.
Link Posted: 2/11/2017 11:31:51 PM EST
[#11]
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Haha...I said "one of"

It feels pretty deep when your floating in it waiting for the tow boat to circle back. 

Baikal is crazy deep and has some hard to believe percent of the worlds fresh water. 
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and fresh water sea lions
Link Posted: 2/11/2017 11:32:11 PM EST
[#12]
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The person I quoted stated the Oroville dam would fail and then used a cofferdam failure that shares very little in design with the Oroville dam while saying they were the same.

I am, of course, concerned that the emergency spillway could fail and considering the size of the reservoir, that would probably result in a huge disaster.  Assuming the entire height of the spillway is above bedrock, the crumbling of the spillway to bedrock on a reservoir that large would be a huge disaster.

So, I don't see the need to make up facts that aren't true to confuse the situation.

As it stands, I don't think the emergency spillway is designed to fail before the 250,000 cfs design rate is reached.  I am guessing that they will continue to run the normal spillway as much as possible in the coming days to drop lake levels for some storage capacity.

As we have seen, the storage capacity of the lake was used to take the very high flows of a few days ago so that by the time the lake filled up, the incoming flow rates were down to something much more manageable.

Lots of people were screaming that the dam should be operated at higher outflows.  The people operating the dam probably understood that the flows would slow down and therefore have picked an outflow rate to minimize damage.

I think they have done well.

I also think they will have to continue operating the normal gates to reduce lake levels so they can do the same thing again in the coming months if more rain and/or snow melt causes big inflows that need to be absorbed by lake level storage rather than topping an already topped emergency spillway.
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The Espill is on top of a hill, if it failed you would have 20 to 40 feet of lake follow it. Look at the video here:


Link Posted: 2/11/2017 11:32:29 PM EST
[#13]
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I hate OP right now. I want In n Out sofaking bad
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I had my dinner all thawed but threw it back in the fridge, headed there in a couple minutes.

3x3 animal style
Link Posted: 2/11/2017 11:33:16 PM EST
[#14]
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Embeds >> Links

eta:  It looks like the flow over the Espillway has decreased or the flow has consolidated into one channel after the left channel plugged itself with all the debris seen in this video.  It also looks like that debris might act to protect that power line tower.

eta again:  The DWR photo set again shows that the Espillway outflow has moved upstream another 30 or so feet.  Looks like the water is finding bedrock and wants to find a path around it to be able to dig deeper.
Link Posted: 2/11/2017 11:34:31 PM EST
[#15]
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Leave it to arfcom to give me a fucking innout craving reading a dam thread
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it's worse when you live in AK, trust me

2005 since I partook
Link Posted: 2/11/2017 11:36:45 PM EST
[#16]
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None of the videos or pictures posted in this thread have shown water flowing Around the Emergency Spillway... so do please post your exclusive news worthy evidence.
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I think it's just a misunderstanding of where the weir actually stops. The fact that it's partially back filled makes it appear narrower than it actually is. It goes a ways beyond that segment of fence that can be seen in several videos
Link Posted: 2/11/2017 11:37:30 PM EST
[#17]
Link Posted: 2/11/2017 11:39:25 PM EST
[#18]
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it's worse when you live in AK, trust me

2005 since I partook  
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I haven't had an In 'N Out Burger since 1992 and I'm in eastern PA.  ProFryan's photos of his dinner stop almost has me in tears jonesin' for a Double Double.
Link Posted: 2/11/2017 11:42:00 PM EST
[#19]
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it's worse when you live in AK, trust me

2005 since I partook
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Leave it to arfcom to give me a fucking innout craving reading a dam thread
it's worse when you live in AK, trust me

2005 since I partook

So strange... Out all day, road trip, haven't checked the thread since 10am or so, got In N Out on the trip back. Then I see everyone getting/craving it here.
Link Posted: 2/11/2017 11:43:11 PM EST
[#20]
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I had my dinner all thawed but threw it back in the fridge, headed there in a couple minutes.

3x3 animal style
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You better be asking for chilis in that burger.
Link Posted: 2/11/2017 11:48:09 PM EST
[#21]
Good job, OP. You're a pretty cool guy.
Link Posted: 2/11/2017 11:48:23 PM EST
[#22]
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Quoted:
The Espill is on top of a hill, if it failed you would have 20 to 40 feet of lake follow it. Look at the video here:


https://www.youtube.com/watch?v=W9YUKbHt6B4
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Quoted:
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The person I quoted stated the Oroville dam would fail and then used a cofferdam failure that shares very little in design with the Oroville dam while saying they were the same.

I am, of course, concerned that the emergency spillway could fail and considering the size of the reservoir, that would probably result in a huge disaster.  Assuming the entire height of the spillway is above bedrock, the crumbling of the spillway to bedrock on a reservoir that large would be a huge disaster.

So, I don't see the need to make up facts that aren't true to confuse the situation.

As it stands, I don't think the emergency spillway is designed to fail before the 250,000 cfs design rate is reached.  I am guessing that they will continue to run the normal spillway as much as possible in the coming days to drop lake levels for some storage capacity.

As we have seen, the storage capacity of the lake was used to take the very high flows of a few days ago so that by the time the lake filled up, the incoming flow rates were down to something much more manageable.

Lots of people were screaming that the dam should be operated at higher outflows.  The people operating the dam probably understood that the flows would slow down and therefore have picked an outflow rate to minimize damage.

I think they have done well.

I also think they will have to continue operating the normal gates to reduce lake levels so they can do the same thing again in the coming months if more rain and/or snow melt causes big inflows that need to be absorbed by lake level storage rather than topping an already topped emergency spillway.
The Espill is on top of a hill, if it failed you would have 20 to 40 feet of lake follow it. Look at the video here:


https://www.youtube.com/watch?v=W9YUKbHt6B4


Any thoughts on my previous question?  About a page ago...
Link Posted: 2/11/2017 11:49:18 PM EST
[#23]
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Quoted:
Video of runoff


<iframe width="560" height="315" src="Gchf6COGAKQ" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/watch?v=Gchf6COGAKQ

https://www.youtube.com/watch?v=Gchf6COGAKQ


https://www.youtube.com/watch?v=bCK1FSKfPwU
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It looks like that transmission tower is perilously close to the bottom of the spillway
Link Posted: 2/11/2017 11:50:00 PM EST
[#24]
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+ the 20 feet or so to the water.

It's called Perspective.
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That fence is like 3'+ the concrete lip.

http://i.imgur.com/b7DRS7T.png
+ the 20 feet or so to the water.

It's called Perspective.
that is a 4 foot fence. yes about 20 feet down to the weir top. which I think is about 40 feet tall at that end. You can count the forms which should be 4ft
Link Posted: 2/11/2017 11:58:40 PM EST
[#25]
Thanks you to the guys on the ground and your hard work.

In for more shocking video of the frantic efforts to keep the Oroville Dam from creating Cali's new ecological attraction, the Feather River Canyon. Imagine, 700 feet deep and extending thru the formerly inhabited town of Oroville creating the new silt bed for 4WD and motorcycle adventure at it's exit. And it was all done by the failure of the fuse plug in broad daylight which was never documented because of a ban on overflights. Even more amazing that it only took two sacks of Quikcrete and a gallon of Flex Seal to patch the flume for the primary sluice, putting the dam back in operation for the six months it took a referendum to pass shutting it down.

One highly popular attraction is the In-n-out Burger located in the old Powerhouse where you can see the turbines making electricity to power the heat lamps for your favorite dinner, spinning at 87 rpm in their original bearings.

Did I miss anything?

In future news, the California Valley crop disaster of '17. How will that impact the State when tax revenues on ag and trucking dry up?
Link Posted: 2/12/2017 12:03:24 AM EST
[#26]
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Quoted:
Thanks you to the guys on the ground and your hard work.

In for more shocking video of the frantic efforts to keep the Oroville Dam from creating Cali's new ecological attraction, the Feather River Canyon. Imagine, 700 feet deep and extending thru the formerly inhabited town of Oroville creating the new silt bed for 4WD and motorcycle adventure at it's exit. And it was all done by the failure of the fuse plug in broad daylight which was never documented because of a ban on overflights. Even more amazing that it only took two sacks of Quikcrete and a gallon of Flex Seal to patch the flume for the primary sluice, putting the dam back in operation for the six months it took a referendum to pass shutting it down.

One highly popular attraction is the In-n-out Burger located in the old Powerhouse where you can see the turbines making electricity to power the heat lamps for your favorite dinner, spinning at 87 rpm in their original bearings.

Did I miss anything?

In future news, the California Valley crop disaster of '17. How will that impact the State when tax revenues on ag and trucking dry up?
View Quote


Yes, the 34.6 v output from the turbines never varied by so much as a jet.
Link Posted: 2/12/2017 12:06:59 AM EST
[#27]
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Good job, OP. You're a pretty cool guy.
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Word. Happy to buy him his choice of Sierra Nevada when this thing settles down.
Link Posted: 2/12/2017 12:07:55 AM EST
[#28]
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Quoted:
Thanks you to the guys on the ground and your hard work.

In for more shocking video of the frantic efforts to keep the Oroville Dam from creating Cali's new ecological attraction, the Feather River Canyon. Imagine, 700 feet deep and extending thru the formerly inhabited town of Oroville creating the new silt bed for 4WD and motorcycle adventure at it's exit. And it was all done by the failure of the fuse plug in broad daylight which was never documented because of a ban on overflights. Even more amazing that it only took two sacks of Quikcrete and a gallon of Flex Seal to patch the flume for the primary sluice, putting the dam back in operation for the six months it took a referendum to pass shutting it down.

One highly popular attraction is the In-n-out Burger located in the old Powerhouse where you can see the turbines making electricity to power the heat lamps for your favorite dinner, spinning at 87 rpm in their original bearings.

Did I miss anything?

In future news, the California Valley crop disaster of '17. How will that impact the State when tax revenues on ag and trucking dry up?
View Quote


Highest point in MO is 1772'...lowest is 230'

So apparently the spillway of Lake Oroville ,dropping 700', may make it to one of your low spots?

Crap...missed the sarc...:-)
Link Posted: 2/12/2017 12:08:12 AM EST
[#29]
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I gotta get me one of them!
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Here ya go, just for the case though. I have one from before hardigg merged with pelican, it's tough as shit. 

storm case
Link Posted: 2/12/2017 12:08:45 AM EST
[#30]
Can anyone explain to me why the lake level is still rising on decreasing inflows and increased outflows?
Link Posted: 2/12/2017 12:13:21 AM EST
[#31]
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Can anyone explain to me why the lake level is still rising on decreasing inflows and increased outflows?
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My unprofessional and uneducated guess.... Sensors are dying/breaking/not working/getting destroyed.
Link Posted: 2/12/2017 12:13:48 AM EST
[#32]
Link Posted: 2/12/2017 12:14:42 AM EST
[#33]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Thanks you to the guys on the ground and your hard work.

In for more shocking video of the frantic efforts to keep the Oroville Dam from creating Cali's new ecological attraction, the Feather River Canyon. Imagine, 700 feet deep and extending thru the formerly inhabited town of Oroville creating the new silt bed for 4WD and motorcycle adventure at it's exit. And it was all done by the failure of the fuse plug in broad daylight which was never documented because of a ban on overflights. Even more amazing that it only took two sacks of Quikcrete and a gallon of Flex Seal to patch the flume for the primary sluice, putting the dam back in operation for the six months it took a referendum to pass shutting it down.

One highly popular attraction is the In-n-out Burger located in the old Powerhouse where you can see the turbines making electricity to power the heat lamps for your favorite dinner, spinning at 87 rpm in their original bearings.

Did I miss anything?

In future news, the California Valley crop disaster of '17. How will that impact the State when tax revenues on ag and trucking dry up?
View Quote


There are no heatlamps at innout
Link Posted: 2/12/2017 12:17:25 AM EST
[#34]
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OK, back on topic...I have no idea what I am talking about...

I have been on the Lake when it was full and as it has been dry.  Just like in the Utube vid, as we had to launch the boat off a dirt road...below the boat ramp...

Are you trying to say that the weir (new word to me) is over 200' high or if the dam is set up for the espill with the weir, as the fuse plug?
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I think what we are getting at is there is not technically a fuse plug but that weir can only take so much pressure or it wouldn't be backfilled like that.


So you have seen the cut and fill drawings for the overflow weir (e-spill)?
Saw a video where the water level was way  down of a guy walking near the boat launch, under where the Espill is, backfill is considerable but steep. He was a couple hundred feet under the current water level.


No way that was a couple of hundred feet, I'm guessing closer to 15'-20'.
I'm trying to give a picture of the underwater topography, not on the spillway side. 
https://www.youtube.com/watch?v=W9YUKbHt6B4


OK, back on topic...I have no idea what I am talking about...

I have been on the Lake when it was full and as it has been dry.  Just like in the Utube vid, as we had to launch the boat off a dirt road...below the boat ramp...

Are you trying to say that the weir (new word to me) is over 200' high or if the dam is set up for the espill with the weir, as the fuse plug?
We have decided that the Espill isn't technically a fuse plug. However some of us believe it may end up that way under extreme conditions. Weir is just a term for a partial dam which is overflowed by the water body as I understand it. The weir is on top of the hill to the left of the boat ramp and is visible for some 40 feet. On the lake side it is backfilled to protect it from hydrostatic pressure. We do not know its full height or thickness.
Link Posted: 2/12/2017 12:21:52 AM EST
[#35]
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Video of runoff


<iframe width="560" height="315" src="Gchf6COGAKQ" frameborder="0" allowfullscreen></iframe>

https://www.youtube.com/watch?v=Gchf6COGAKQ

https://www.youtube.com/watch?v=Gchf6COGAKQ


https://www.youtube.com/watch?v=bCK1FSKfPwU
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That first drone video was incredible! We need more rogue drone flyers like this, that was some beautiful footage. 

OP, you are the freaking man for your efforts today! If I weren't half a country away from you, I'd drag out a few cases of ammo, and whatever you want to shoot for your efforts. I know it's been mentioned before, but you definitely get my vote for most awesome teener of arfcom this year! Thank you for streaming us all the great videos. 
Link Posted: 2/12/2017 12:23:21 AM EST
[#36]
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We have decided that the Espill isn't technically a fuse plug. However some of us believe it may end up that way under extreme conditions. Weir is just a term for a partial dam which is overflowed by the water body as I understand it. The weir is on top of the hill to the left of the boat ramp and is visible for some 40 feet. On the lake side it is backfilled to protect it from hydrostatic pressure. We do not know its full height or thickness.
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Thanks...I have seen this weir and I have touched it...again, I know nothing about this...but, wholly cow...if this thing was made to fail...it is way above my pay grade...
Link Posted: 2/12/2017 12:27:02 AM EST
[#37]
And just to helpfurther tourism to vegas
Link Posted: 2/12/2017 12:28:48 AM EST
[#38]
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You guys bitching about your cute little ponds... errr I mean lakes.
Link Posted: 2/12/2017 12:29:36 AM EST
[#39]
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So if they are dumping out water faster than it is coming in, how the hell is the level still going up?
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Distance between the sensors maybe ?
Link Posted: 2/12/2017 12:30:54 AM EST
[#40]
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No.  There's a video several pages back posted multiple times of the KRCA news helicopter over the area in the morning.  You can hear the pilot dealing with lots of aircraft coming into the area and not communicating very well... the airspace was getting crowded and was uncontrolled... so he left... he didn't want some sightseeing random person to run into him.

I would guess he filed some sort of complaint or someone who's job it is to manage airspace noticed or the choppers zipping in and out working on the electrical lines requested the restricted airspace.
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Any reason to think they did the no fly zone to stop news people reporting how bad it actually is?
No.  There's a video several pages back posted multiple times of the KRCA news helicopter over the area in the morning.  You can hear the pilot dealing with lots of aircraft coming into the area and not communicating very well... the airspace was getting crowded and was uncontrolled... so he left... he didn't want some sightseeing random person to run into him.

I would guess he filed some sort of complaint or someone who's job it is to manage airspace noticed or the choppers zipping in and out working on the electrical lines requested the restricted airspace.

I listened to that exchange, and have flown in similar situations. The news help was at 3100 ft, just above the TFR zone, following all legal and professional procedures- after all, that's what he does, every day. There was just too many assholes, lookyloos, as described on the radio, 
But nobody is 'managing'the TFR zone, it is an honesty system amongst gentlemen pilots, and sometimes an asshole shows up, just like everywhere else. And when shut goes sideways, just like at the range, it's best to unass the area, NOW
Link Posted: 2/12/2017 12:31:44 AM EST
[#41]
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Can anyone explain to me why the lake level is still rising on decreasing inflows and increased outflows?
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Wind might have changed direction.
Link Posted: 2/12/2017 12:31:59 AM EST
[#42]
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The past 3 hours, outflow (River CFS) has been greater than their "Inflow CFS" number, yet the water keeps rising.

As we know, every inch of elevation is a lot more water than the previous inch.  So if they are dumping out water faster than it is coming in, how the hell is the level still going up?

I also feel sorry for that dude standing on top of the spillway by the fence, he drew the short straw for counting how many fish go over.
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02/11/2017 19:00902.33357454355148675336946534.7613.4
02/11/2017 20:00902.39357549955005662406897934.7613.4
02/11/2017 21:00902.443576295------34.7613.5


The past 3 hours, outflow (River CFS) has been greater than their "Inflow CFS" number, yet the water keeps rising.

As we know, every inch of elevation is a lot more water than the previous inch.  So if they are dumping out water faster than it is coming in, how the hell is the level still going up?

I also feel sorry for that dude standing on top of the spillway by the fence, he drew the short straw for counting how many fish go over.
My theory: Delayed effect between the inflow and outflow locations. The size of the lake means the flow over the emergency spillway started slowly and is now increasing to match the inflow. It wasn't an instaneious 30k CFS going over that wall. At some point outflow will exceed inflow until equilibrium is reached and then the lake height will begin to fall.
Link Posted: 2/12/2017 12:34:19 AM EST
[#43]
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I had my first in n out in vegas a couple weeks ago during SHOT show. I gotta say, as simple as that burger was, it was amazing! Will be back for more!
Link Posted: 2/12/2017 12:35:00 AM EST
[#44]
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Thanks...I have seen this weir and I have touched it...again, I know nothing about this...but, wholly cow...if this thing was made to fail...it is way above my pay grade...
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I think they don't ever intend for it to fail, however if shit was really bad and you asked me to save the dam I would blow that tall section of the Espill on the left end towards the parking lot and let some pressure off the dam.
Link Posted: 2/12/2017 12:36:15 AM EST
[#45]
I have to add...this Lake is so big, that it has floating outhouses...
Link Posted: 2/12/2017 12:42:02 AM EST
[#46]
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Can anyone explain to me why the lake level is still rising on decreasing inflows and increased outflows?
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Common core.
Link Posted: 2/12/2017 12:42:37 AM EST
[#47]
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We have decided that the Espill isn't technically a fuse plug. However some of us believe it may end up that way under extreme conditions. Weir is just a term for a partial dam which is overflowed by the water body as I understand it. The weir is on top of the hill to the left of the boat ramp and is visible for some 40 feet. On the lake side it is backfilled to protect it from hydrostatic pressure. We do not know its full height or thickness.
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A weir is a flow device.  There are many types of weirs used in agriculture and civil works.  The emergency spillway at Oroville is a an overflow weir which provides a smooth laminar flow when topped.

Folks keep saying fuse plug - I suppose what you/they mean is a some sort of dyke that is designed to be breached, like the Birds Point and New Madrid levees on the Mississippi that were intentionally breached by the COE in 2011.  The emergency spillway at Oroville Dam is most certainly NOT designed to breach.  

I do not believe we know the backside of the emergency spillway is backfilled to protect it from hydrostatic pressure.  I personally believe the emergency spillway was sited in that position because the bedrock rises on that side of the damn and the pool depth and spillway / dam / emergency spillway configuration made sense given the geography.
Link Posted: 2/12/2017 12:46:18 AM EST
[#48]
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I think they don't ever intend for it to fail, however if shit was really bad and you asked me to save the dam I would blow that tall section of the Espill on the left end towards the parking lot and let some pressure off the dam.
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Again...I know nothing about hydrodynamics...

However, I would blow the E-weir to allow the lake to drain the about 40 feet below 901' before I would do anything else...

But then again, I do not have the all the info on what would happen with all the different scenarios......


dcat above makes more sense than I
Link Posted: 2/12/2017 12:47:57 AM EST
[#49]
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That first drone video was incredible! We need more rogue drone flyers like this, that was some beautiful footage. 

OP, you are the freaking man for your efforts today! If I weren't half a country away from you, I'd drag out a few cases of ammo, and whatever you want to shoot for your efforts. I know it's been mentioned before, but you definitely get my vote for most awesome teener of arfcom this year! Thank you for streaming us all the great videos. 
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Something I noticed in the first video was that there was some relatively "clean" water in with the red muddy water.  That makes me wonder if the erosion of the main spillway has stabilized and found bedrock, allowing the "clean" lake water coming down it to flow more or less without picking up a lot of additional mud.


The other videos showing the down stream portion of the Feather river show just how bad things are.  There isn't any more room for water to go and stay within the banks of the river.  Any significant increase in overflow from the dam is just going to flood more and more land below the dam.
Link Posted: 2/12/2017 12:47:57 AM EST
[#50]
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I had my first in n out in vegas a couple weeks ago during SHOT show. I gotta say, as simple as that burger was, it was amazing! Will be back for more!
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I had my first in n out in vegas a couple weeks ago during SHOT show. I gotta say, as simple as that burger was, it was amazing! Will be back for more!


I was kind of shocked at the basic menu the OP posted...burgers, fries and shakes. Then I googled them.

Good lord! and I love their cups and fry boats, so retro.
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