Author Topic: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency  (Read 1639 times)

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Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #25 on: June 10, 2024, 10:41:32 pm »
@rustynail  pointing-up Thank you.

That guy is too engineery. It ain't no damn piano.
The vid was enlightening though. They've already pushed the top soil off the uphill side, and you can bet money there will be 2 lanes of gravel there, toot-sweet. It'll be 20' lower than the original road, using the original road to bolster the temporary one. Meanwhile, the original road will be pushed into the cut to provide material for the fix.

I still think it was a water issue. And to fix it proper, a big culvert (3' anyway, maybe a 5' squashpipe) would need to be installed at the bottom of the fill - That will take longer than anything to do it proper - So I bet they won't do it.

Offline DB

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #26 on: June 10, 2024, 10:53:39 pm »
@rustynail  pointing-up Thank you.

That guy is too engineery. It ain't no damn piano.
The vid was enlightening though. They've already pushed the top soil off the uphill side, and you can bet money there will be 2 lanes of gravel there, toot-sweet. It'll be 20' lower than the original road, using the original road to bolster the temporary one. Meanwhile, the original road will be pushed into the cut to provide material for the fix.

I still think it was a water issue. And to fix it proper, a big culvert (3' anyway, maybe a 5' squashpipe) would need to be installed at the bottom of the fill - That will take longer than anything to do it proper - So I bet they won't do it.

There's no obvious seepage of water coming out of the sidewalls of where it failed. So it isn't clear there was any underground source of water moving through it. Most likely cause is poor engineering with the soils used.

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #27 on: June 10, 2024, 10:55:25 pm »
There's no obvious seepage of water coming out of the sidewalls of where it failed. So it isn't clear there was any underground source of water moving through it. Most likely cause is poor engineering with the soils used.

There's a cavern on the leftward face of the slide. Zoom way in on that.

Offline DB

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #28 on: June 10, 2024, 10:56:58 pm »
There's a cavern on the leftward face of the slide. Zoom way in on that.

Yes, the soil was less compacted there. But I don't see any signs of water seeping out of any of it.

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #29 on: June 10, 2024, 11:05:05 pm »
Yes, the soil was less compacted there. But I don't see any signs of water seeping out of any of it.

Look below it on the natural ground. And look deep inside it... Wtf is that? something white-ish...

Doesn't matter. there's 10-20 year old trees on the downhill sluff edge... That dirt stayed put a long time before it gave. To write off water in an extraordinarily wet spring, on a big fill with no drainage is a mistake, I think.

And they'll use the fill they have. It's  a mountain road. You have to mess with it all the time.

Offline DB

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #30 on: June 10, 2024, 11:10:28 pm »
Look below it on the natural ground. And look deep inside it... Wtf is that? something white-ish...

Doesn't matter. there's 10-20 year old trees on the downhill sluff edge... That dirt stayed put a long time before it gave. To write off water in an extraordinarily wet spring, on a big fill with no drainage is a mistake, I think.

And they'll use the fill they have. It's  a mountain road. You have to mess with it all the time.

That is probably layers of fill. The fill likely came from different locations with different soil composition.

Offline rustynail

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #31 on: June 10, 2024, 11:10:58 pm »
A curved suspension bridge would look nice.

Offline DB

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #32 on: June 10, 2024, 11:15:33 pm »
Look below it on the natural ground. And look deep inside it... Wtf is that? something white-ish...

Doesn't matter. there's 10-20 year old trees on the downhill sluff edge... That dirt stayed put a long time before it gave. To write off water in an extraordinarily wet spring, on a big fill with no drainage is a mistake, I think.

And they'll use the fill they have. It's  a mountain road. You have to mess with it all the time.

There still could have been water, but it would have to be below what we can see. Maybe even a sink hole. On what you can see, if it were saturated with water it would be seeping out at the edge of the failure. That isn't obvious in the photo.

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #33 on: June 10, 2024, 11:17:00 pm »
There still could have been water, but it would have to be below what we can see. Maybe even a sink hole. On what you can see, if it were saturated with water it would be seeping out at the edge of the failure. That isn't obvious in the photo.

I think that cavern fell into the failure.

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #34 on: June 10, 2024, 11:18:58 pm »
A curved suspension bridge would look nice.

Bridges cost lots and lots of money. There's a reason why there ain't a bridge there already.

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #35 on: June 10, 2024, 11:31:31 pm »
Where is the sluff? where did it go?

Offline roamer_1

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #36 on: June 10, 2024, 11:49:24 pm »


Here it is. The road did not fail... the natural land beneath it went. The sluff, with its trees intact...

Offline Sighlass

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #37 on: June 11, 2024, 01:45:19 am »
Every 10 years we have a nice wipeout on our mountain roads up the mountain.... 2 years later they have them up and running again at full capacity. Fortunately there is several means of getting up the mountain within a few miles of each other. But it does put a strain on the truckers at times.

Good news is this slide can be temp fixed with a few 2X4s and duct tape. /s
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Offline Smokin Joe

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Re: Wyoming’s Teton Pass Road Collapses, Governor Declares Emergency
« Reply #38 on: June 11, 2024, 01:52:21 am »


Here it is. The road did not fail... the natural land beneath it went. The sluff, with its trees intact...
It isn't done. Note the crack in the pavement on the right side. There is another slice there that looks primed to follow the original slide.
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