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Old 01-07-2018, 07:51 AM
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Default Rattlesnake Ridge sliding away



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Who lives near Yakima? This hill is slowly slumping over.

https://blogs.agu.org/landslideblog/...snake-ridge-1/

Last edited by dethmaul; 01-07-2018 at 07:53 AM.. Reason: Link didn't paste properly
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Old 01-07-2018, 08:17 AM
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Originally Posted by dethmaul View Post
Who lives near Yakima? This hill is slowly slumping over.

https://blogs.agu.org/landslideblog/...snake-ridge-1/
I note that the comments section that followed the article had several from geologists familiar with the basalt structures of the area, and landslides in general, saying "O! M! G!!!"

That's not reassuring.
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Old 01-07-2018, 10:33 AM
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Wouldn't want to be travelling down that road below when it lets loose...
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Old 01-07-2018, 10:43 AM
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Nothing will be done about it until it goes.

A controlled landslide using demolition with all residents out of harms way would be safer but then the cost would be on the state and if the state waits until the ridge collapses then they can ding dong the federal government for disaster assistance.

What's a few humans anyway? \sarcasm.
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Old 01-07-2018, 10:44 AM
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Residents below the ridge are being advised to evacuate now:

http://www.spokesman.com/stories/201...icted-landsli/

and a geologist thinks it will be very bad and happen by early February:

https://www.seattletimes.com/seattle...icials-expect/
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Old 01-07-2018, 02:04 PM
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they have been undermining the toe of the hill for many years, I have been past there many times and rode horses up on the rattlesnake ridge.
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Old 01-07-2018, 02:33 PM
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The officials seem to be saying, 'We don't like what you're saying about it all coming down, so we won't listen to you. But these other guys, who say it will be a minor thing and most it will fall in the quarry - we like that so we'll listen to them."

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"That geologists can come to such opposite conclusions shows how hard it is to predict the behavior of a massive, unstable pile of rock and dirt ..... "Anytime you are approaching millions of cubic yards of material moving, there is not a deep well of experience to draw from on how it will behave,” he cautioned. “There are a number of ways that this could develop.”
As long as there is the possibility of a sudden collapse without warning the road and rail should be closed. Basing their strategy on the hope they will get lucky isn't a winning formula.
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Old 01-07-2018, 03:38 PM
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My girlfriend lives upriver a few miles. If you travel up in the hills around there you can see where slides like this have occurred naturally (though it seems pretty obvious this was man made). Right now the ground around here is frozen, come the spring with the thaw and the rain we'll be getting I dont see how all that dirt is going to stay up on the hillside. A pretty busy highway, a railroad and a river will probably all be closed up if that whole hillside goes.
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Old 01-07-2018, 10:55 PM
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That area is getting quite a bit of rain right now. I'm not sure it will wait for the thaw. The ground has got to be pretty soaked.
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Old 01-09-2018, 03:28 PM
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hopefully it won't block the river, but the canyon is narrow there.... I can see this going bad in a real way...
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Old 01-10-2018, 05:24 AM
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Look at the risk.


Look at how they haven't closed the waterway, the railway, or the road.

Now go read about the state of the US's roads and bridges.

Think of that next time you cross a bridge.

Happy driving
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Old 01-11-2018, 04:33 AM
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Different cause,but Ca. is dealing with many deaths from mudslides currently.Maybe you locals should forward some of the reports to your local "officials"?
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Old 01-11-2018, 02:46 PM
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Default Yakima County Declares a Disaster at Rattlesnake Ridge

http://www.king5.com/article/news/lo.../281-505365303
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Old 01-11-2018, 04:18 PM
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Didnt that let go yesterday?

I saw on the news Oprah whining about her land and some guy trying to rescue his family but his dumb mom decided to go downstairs and got killed.

The funny (not haha) part is that they knew it was going to let go for over a week and decided to stay put.

Risking it to ride out a storm is one thing, staying in the path of a mudslide that is going to have the force and weight of millions of tons of earth moving in a unstoppable wave is just foolish.
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Old 01-11-2018, 05:56 PM
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a little confused about the differences between Washington State and southern California? It's about a thousand miles between Yakima and LA
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Old 01-12-2018, 11:04 AM
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Quote:
Originally Posted by Bud View Post
a little confused about the differences between Washington State and southern California? It's about a thousand miles between Yakima and LA
Can I have reading comprehension for $800?
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Old 01-12-2018, 04:52 PM
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http://q13fox.com/2018/01/10/rattles...rofessor-says/
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Old 01-16-2018, 09:43 AM
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I wonder how exactly it will slump since it's rock and loess. I hope it doesn't go too terribly far.
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Old 01-20-2018, 10:31 AM
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Quote:
Originally Posted by Bud View Post
a little confused about the differences between Washington State and southern California? It's about a thousand miles between Yakima and LA
The mudslides in LA (like the one in Oso, WA a few years back) are mud slides, the hill side becomes water soaked and can't withstand gravity. Just like fecal matter, mud goes down hill. In LA, the fires burned off the greenery that helps absorb the water.

In Yakima County, the slide is the result of a rocky hillside giving way, not mud. The entire area is geologically active (minor quakes occur at Mt Adams and Mt St Helens, both within 100 miles of Yakima area). The quarry has ate away the foot of the hill, and a layer of the hillside is just breaking off. Happens all the time, naturally, but this case is a result of bad quarrying, I believe.
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Old 01-20-2018, 10:40 AM
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Latest news is that the unstable part is moving at about 3 inches a day. That constancy stumps geologists. If it were accelerating, that would mean the slide was getting ready to let go. If it was diminishing, that might mean it was stabilizing. But 3 inches a day, day in, day out, they're not sure what to make of that. But every inch it moves, brings the collapse that much closer...

http://nwnewsnetwork.org/post/rattle...ict-geologists
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