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Major Hurricane Ida


WxWatcher007
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12 minutes ago, RandyHolt said:

We take the cheap ugly and inefficient way out. When folks visit me from the EU they are always amazed at our lame duck solution, noting how ugly it is. It's not just NO and low lying areas, of course.

Really? Underground is on average 10 times more expensive than overhead lines. Europe as a continent is barely larger than the entirety of the US. I'd like to see them run underground lines hundreds of miles for no reason whatsoever. We could increase the amount of underground lines but then we'd dramatically increase the cost of electricity and underground lines are much more difficult to fix if something goes wrong. Source: I work for a utility. 

As a side note, NO is in trouble for a few days, if not weeks, if all 8 transmission lines into town are out of service. That would explain why they had a "catastrophic" failure to cause 100% power loss. The tower that fell into the Mississippi can have the line be temporarily rerouted in a matter of days if the area isn't under water. 

Edit: edited two inaccurate statements 

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9 minutes ago, RandyHolt said:

We take the cheap ugly and inefficient way out. When folks visit me from the EU they are always amazed at our lame duck solution, noting how ugly it is. It's not just NO and low lying areas, of course.

I work in transmission.  There's no shortage of transmission towers in Europe.  ...

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How states, counties, townships etc along the coast,  allow surface transmission lines is beyond me. Makes absolutely no sense. Let’s put a tree in the ground and attach 480 to it. Hopefully since we call it a pole it will survive 150 mph winds… insanity
480? Distribution is usually 12.47, 25, etc kV, so MV; 480 is LV. Transmisison usually much higher, > 100 kV. Either way, reality, is underground and ring/euro RMU style distribution is much more reliable, but brownfield is 7 figures per mile. Either way, if your transmission towers fall into the Mississippi not much you can do. Microgrids could get power to back to some sooner, but tough and general favor the ones with the means.

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3 minutes ago, Kristospherein said:

Really? Underground is on average 10 times more expensive than overhead lines. Europe as a continent is barely larger than the entirety of the US. I'd like to see them run underground lines hundreds of miles for no reason whatsoever. We could increase the amount of underground lines but then we'd dramatically increase the cost of electricity and underground lines are much more difficult to fix if something goes wrong. Source: I work for a utility. 

As a side note, NO is in trouble for a few days, if not weeks, if all 8 transmission lines into town are out of service. That would explain why they had a "catastrophic" failure to cause 100% power loss. The tower that fell into the Mississippi can have the line be temporarily rerouted in a matter of days if the area isn't under water. 

Europe has overhead transmission lines in rural areas and over long distances. They don't have overhead local distribution in denser areas. 

 

America does, and america is less dense, but more of that has to do with the us allowing rampant, ugly sprawl to occur anywhere, and it's invention of the disaster that is the modern car dependent suburb.

If everywhere else that is developed can afford to bury power, so can the usa, but if it's a major transmission line here, that's not the issue. The larger issue is needing the line in the first place to service thousands living in an area that will constantly, and increasingly meet with disaster.

 

 

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Just now, mempho said:

This is inside the Storm Damage Reduction System for New Orleans. I mean, could easily be extreme flash flooding...
I hope so.

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I mean, extreme flash flooding pushing people all the way to the attic? 

 

Either way, regardless of how it is happening that is incredibly bad news.

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I mean, extreme flash flooding pushing people all the way to the attic? 
 
Either way, regardless of how it is happening that is incredibly bad news.
I'm saying that because my understanding is that there is no risk of storm surge inside the system.... That's what they were telling everyone, at least.

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11 minutes ago, KPITSnow said:

That is potentially extremely bad. 

I think that is where the memorable footage of a driver driving into the water and a reporter rushing in to help him was, near the I-10/610 split.  I've been to New Orleans and Venice enough to know that area.  That video was on TV before people outside NOLA knew about the flooding in the city.  I don't know if that is rainwater flooding alone, or there has been a flood control/levee breach.  But that area was where the first indication New Orleans wasn't fine, as reported by reporters staying in the French Quarter.

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6 minutes ago, mempho said:

This is inside the Storm Damage Reduction System for New Orleans. I mean, could easily be extreme flash flooding...
I hope so.

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I don't believe it is. It is not according to the maps of that system I am pulling up. It iappears it is west of where that system ends.

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It could be rain, but the second floor window flooding rescues in Houston/Harvey didn't start the first day with the first foot of rain.  Not claiming to be any kind of expert in rainfall runoff, but roof top rescues from a foot of rain, that doesn't seem likely in fairly flat terrain.

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9 minutes ago, Doc Jon said:

2900 block of Donner drive in New Orleans flooded, water rising.

Looks like there is some sort of small stream that runs parallel to Donner Dr in NOLA. It looks tiny, so the fact that they're reporting flooding from it is pretty astonishing. 

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