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Oroville dam spillway damaged

They need some of those blue tarps from Ace hardware, those things work great
 
Brokenlink said:
Not entirely true. It's an emergency repair so they can bypass ceqa.
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The repairs will be statutorily exempt under CEQA but not categorically excluded under NEPA because there is a federal nexus and there is probably downstream damage in the riparian zone. Permits and mitigation will be required and the Army Corp as well as USFWS will be involved (fish passage).

I just made my classification to environmental planner today :banana
 
Wow, some great pics for scale. Didn't realize it was so beeeeeeeg!
 
JakesKTM said:
The repairs will be statutorily exempt under CEQA but not categorically excluded under NEPA because there is a federal nexus and there is probably downstream damage in the riparian zone. Permits and mitigation will be required and the Army Corp as well as USFWS will be involved (fish passage).

I just made my classification to environmental planner today :banana
Click to expand...

:thumbup
 
Get the neighborhood kids to put a skateboard jump on it. Than rent inner tubes and sell tickets. :laughing

There is an interesting water dynamic on those spillways. Forces that alternate eroding areas. One section hardly wears, next section wears quickly.

[youtube]hu1zAoQBQbM[/youtube]
 
This is about the only picture i've seen from today.

920x920.jpg



And you have to wonder, with the next big rain storms less than a week away.. now what?
 
Phanuel said:
How is the emergency spillway designed? Is it a concrete wall at the top as well so that that top of the reservoir on the west side doesn't just get washed down the hill as debris and completely bypass the dam?
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Calling it a spillway is a little... misleading. It's a designated hillside that is deemed OK to be washed away.

The only part that is concrete is the lip the water will be spilling over, and maybe a short section near it to keep water from going to Other Bad Places?

Read up on Hydraulic Mining For the kind of environmental impact one could expect.
 
JakesKTM said:
I just made my classification to environmental planner today :banana
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Congratulations.:thumbup

Now, please tell God to not send so much rain and snow. He's messing up the environment and killing Salmon. I like Salmon.:rofl
 
auntiebling said:
Read up on Hydraulic Mining For the kind of environmental impact one could expect.
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IIRC, hydraulic Mining was so devistating to the landscape it was banned IN THE 1800's ! strictly for environmental reasons. Think about how many tree huggers were around in the 1800's....
 
auntiebling said:
Calling it a spillway is a little... misleading. It's a designated hillside that is deemed OK to be washed away.

The only part that is concrete is the lip the water will be spilling over, and maybe a short section near it to keep water from going to Other Bad Places?

Read up on Hydraulic Mining For the kind of environmental impact one could expect.
Click to expand...

I'm sure they designed it well. I was just curious how it was designed.

But then we see the spillway disintegrating so maybe I'm giving them too much credit...
 
Phanuel said:
I'm sure they designed it well. I was just curious how it was designed.

But then we see the spillway disintegrating so maybe I'm giving them too much credit...
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"Structural engineering is the art of molding materials we don't wholly understand, into shapes we can't fully analyze, so as to withstand forces we can't really assess, in such a way that the community at large has no reason to suspect the extent of our ignorance." ...James E. Amrhein - Masonry Institute of America
 
Mike95060 said:
IIRC, hydraulic Mining was so devistating to the landscape it was banned IN THE 1800's ! strictly for environmental reasons. Think about how many tree huggers were around in the 1800's....
Click to expand...

Look at the damage it did to Arizona

ken-sanger-grand-canyon.png
 
revnort said:
So it sounds like they just have opted to completely sacrifice the spillway rather than use the emergency run off?

http://kron4.com/2017/02/10/sacrificing-lake-orovilles-spillway-may-avoid-emergency-releases/
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Indeed it does.
"The devil you know" kind of situation. Also, if they intentionally use the Emergency Spillway they might still have to use the damaged Regular Spillway if things get out of hand. It's already sending a ton of sediment and debris downstream, at least it isn't irreparably destroying a hillside also. Yet
 
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