OlympicMtnBoy Posted March 23, 2014 Share Posted March 23, 2014 Just got home and saw this, I know a lot of us have driven that road (Hwy 530) to Darrington many times. Condolances to the family members and best wishes for the still missing: http://seattletimes.com/html/localnews/2023201818_mudslidexml.html http://seattletimes.com/html/localnews/2023201818_mudslidexml.html 3 die in mudslide east of Arlington, 6 homes destroyed Mud slammed Saturday into homes near the Snohomish County town of Oso and cascaded over state Highway 530, into the Stillaguamish River, which is backed up by debris. Quote Link to comment Share on other sites More sharing options...
mountainsloth Posted March 24, 2014 Share Posted March 24, 2014 Shit! Hope Hanman and family are ok. Quote Link to comment Share on other sites More sharing options...
genepires Posted March 24, 2014 Share Posted March 24, 2014 same thoughts. saw a satellite photo on the news of the area and it looks like the slide was to the north and far east or west of his house. Could not see the side road that his house is on which is to the south of the hwy. hope that he will chime in soon. Quote Link to comment Share on other sites More sharing options...
num1mc Posted March 24, 2014 Share Posted March 24, 2014 Shit! Hope Hanman and family are ok. Ditto. I bet Chief Dennis Fenstermaker of Darrington FD is busy too. Denny is a old time climber with a number of FA's, including the Zipper at Index. He is also a SFD firefighter and head of the High Angle rescue for SFD. Quote Link to comment Share on other sites More sharing options...
mattp Posted March 24, 2014 Share Posted March 24, 2014 I talked to Hanman yesterday and they evacuated but are fine. Quote Link to comment Share on other sites More sharing options...
hanman Posted March 24, 2014 Share Posted March 24, 2014 Hi all- We saw many choppers in the air all of the sudden, didn't realize what had happened. Power, phone and internet all went out. I looked out at the Stilly which is only about 300 feet away from our home, and the river had dropped to the lowest condition I have ever seen in an hour long period. I figured something like this happened, so we got out with the fam and pets in about 5 minutes. It just seemed really surreal. I'm really sorry for all the affected community, there are only 320 or so residents in Oso proper, so everyone has a stake or close friend impacted.The toll on the responders was quite evident as we drove through to get a few things from the house yesterday. They have performed quite a difficult and painful task and continue to do so at considerable risk. Thanks all for the good wishes- Mark Hanna Quote Link to comment Share on other sites More sharing options...
G-spotter Posted March 24, 2014 Share Posted March 24, 2014 NPR and BBC just reported than in addition to 8 confirmed dead, as many as 108 people are missing. Quote Link to comment Share on other sites More sharing options...
tvashtarkatena Posted March 24, 2014 Share Posted March 24, 2014 18, not 108 Quote Link to comment Share on other sites More sharing options...
JasonG Posted March 24, 2014 Share Posted March 24, 2014 Dru is right on this one, they just updated it. However,I expect it to be revised downwards significantly once a few more days go by. Still, many folks we've worked with over the years on Steelhead Drive are no longer with us....the scale of this most recent slide is hard to comprehend. So much bigger than 2006. I've worked as a fish bio on the Stilly for the past 14 years and this is as bad of an event as I'm likely to see in my career. Quote Link to comment Share on other sites More sharing options...
JL1216 Posted March 24, 2014 Share Posted March 24, 2014 http://blogs.seattletimes.com/today/2014/03/update-on-search-of-mudslide-expected-at-9-a-m-today/ Seattle times says 108. Hope they are wrong. Quote Link to comment Share on other sites More sharing options...
ivan Posted March 24, 2014 Share Posted March 24, 2014 goddamn gravity Quote Link to comment Share on other sites More sharing options...
wayne Posted March 24, 2014 Share Posted March 24, 2014 Much sorrow for the catastrophe, and the people involved. Was that hill one giant moraine? Seems like it could happen anywhere near a hill. Yikes Quote Link to comment Share on other sites More sharing options...
olyclimber Posted March 24, 2014 Share Posted March 24, 2014 (edited) you can see a couple photos of the slide in the WSDOT flicker set: Edited March 24, 2014 by olyclimber Quote Link to comment Share on other sites More sharing options...
G-spotter Posted March 24, 2014 Share Posted March 24, 2014 Was that hill one giant moraine? Seems like it could happen anywhere near a hill. Yikes It's thick, uncompacted glaciolacustrine sediments with a thin cap of glaciofluvial sand, overlying thick compacted till. Quote Link to comment Share on other sites More sharing options...
tvashtarkatena Posted March 24, 2014 Share Posted March 24, 2014 Damn. I heard 18 on NPR this morning and was hoping that was a typo. 18 is not a small number in and of itself. Grim. Quote Link to comment Share on other sites More sharing options...
JasonG Posted March 24, 2014 Share Posted March 24, 2014 The LiDAR for the Hazel reach is sobering. In the last several thousand years there have been several slides larger than the one that we just witnessed. Dru nailed the geology, something that plagues the NF in several reaches. Think of it as a combination of of moraine and lake sediments from when the Puget Lobe blocked the NF valley mouth. The thing that is interesting to me is that, contrary to what the ST reported, the river was not actively cutting at the toe of the slide. We built a several thousand foot log revetment to keep the river away from the toe of the slide after the 2006 event. It was performing as designed and the material behind the crib wall (extending up to the old head scarp) was very low angle and not in danger of failing. This slide originated much higher (a couple hundred feet above the old head scarp) and overran the old debris, going very much farther than I had expected. Amazing. Quote Link to comment Share on other sites More sharing options...
G-spotter Posted March 25, 2014 Share Posted March 25, 2014 It looks like it started as a big rotation: you can see the trees all fallen over on the intact top block. Then when that hit the lower sediments they fluidized and boom. Quote Link to comment Share on other sites More sharing options...
catbirdseat Posted March 27, 2014 Share Posted March 27, 2014 Has anyone seen the slide on Jumbo Mountain from about ten years ago? It was big and cut the road up Squire Creek. I wonder in what ways this is similar or different to that one. Quote Link to comment Share on other sites More sharing options...
num1mc Posted March 27, 2014 Share Posted March 27, 2014 (edited) Jumbo Mountain was probably a failure in the melange bedrock, which the scoured wet debris and the glacial veneer as it flowed downhill. It could have also originated as a relatively small slump in a sedimentary veneer up high. Hazel/Oso is a huge classic slump Edited March 27, 2014 by num1mc Quote Link to comment Share on other sites More sharing options...
JasonG Posted March 27, 2014 Share Posted March 27, 2014 As Mr. mc said, they are very different. To my eye the Jumbo slide started with a chunk of cliff peeling off and impacting the slope below, causing a shallow rapid slide of mostly coarse material. The Steelhead Haven slide of 2014 is a classic deep seated rotational failure as described above. Quote Link to comment Share on other sites More sharing options...
Good2Go Posted March 27, 2014 Share Posted March 27, 2014 How about the Naches slide? Seems pretty analogous, at least with respect to the quarry and river at the bottom. Quote Link to comment Share on other sites More sharing options...
JasonG Posted March 27, 2014 Share Posted March 27, 2014 Similar rotational motion, but very different geology: http://seattletimes.com/html/localnews/2011077973_landslide15m.html Quote Link to comment Share on other sites More sharing options...
olyclimber Posted March 27, 2014 Share Posted March 27, 2014 Jason, when you say "rotational", what is actually rotating? It is just the whole mass of the slide? Quote Link to comment Share on other sites More sharing options...
olyclimber Posted March 27, 2014 Share Posted March 27, 2014 Yeah...I know...LMGTFY Quote Link to comment Share on other sites More sharing options...
max Posted March 27, 2014 Share Posted March 27, 2014 How about the Naches slide? Seems pretty analogous, at least with respect to the quarry and river at the bottom. Or the Hwy 97A slide...? Quote Link to comment Share on other sites More sharing options...
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