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Wet fall. Above average snow pack. Wet and warn spring. Which canyon will we see this first?
http://seattletimes.com/html/localne...dslidexml.html (Too much crap to link.)
http://seattletimes.com/ABPub/2014/03/22/2023202605.jpg
https://pbs.twimg.com/media/BjaoTP7CcAAn0pR.png:large
You asking about something like that here? The geology in CO and there in WA are quite different.
Dang, looks like a few homes are gone.
Up to 16 dead as of this evening. Whole lot more are missing. Some are likely to never be found.
Approximately 1 mile of mud. 100+ whereabouts unknownQuote:
Originally Posted by sniper7
There are some slide scares in Boulder Canyon, from the Sept. rains/flooding.Quote:
Originally Posted by Gman
They seem to be more concerned about the streams staying within their banks due to debris and inferior dams resulting in flooding.
CDOT worries that work to repair damage from September's flood could be washed away.
The main concern is to dredge the rivers, so the water has a place to run off. Take a run up Boulder Creek. East to west, there are backhoes in the water clearing sediment.
Barker Res. is still full from the Sept. flooding. The res. has to be at least 1/3 empty before spring run off.
We are looking at a 30-90 day flood watch.
Yea, they haven't dredged the creeks yet in Longmont, wondering if they're going to get to them in the next six weeks before the melt begins.
I heard that 49 structures were directly in the path of this mud slide. I can't see any in the before shot though. I don't remember how many were permanently occupied.
From what I have heard, the subdivision that was hit early Sunday morning, was most likely still occupied.
You can see the road layout for the subdivision in the before photo. The subdivision was under construction and alot of the missing are the construction crews.
Is it just me or is there evidence of a previous slide in that before picture?
Conpletely right merl. Also they built on a flood plain.
It's Snohomish County. When I lived in Seattle, you could count on every spring seeing what seemed to be the same Snohomish residents, standing in the middle of flooded fields and streets telling the reporter "Well, it flooded last year, and the year before, but we didn't think it would flood again".Quote:
Originally Posted by Wulf202
I work with Boulder County Emergency Radio services. At our annual meting few weeks ago, the head of the Boulder County EOC aid that we were at 120% of average snowpack and 100% of the waterways in the county were damaged by the floods. We are expecting a busy spring, especially if we have a rapid melt.Quote:
Originally Posted by Ah Pook
Same thing I'm hearing.Quote:
Originally Posted by Singlestack
Sounds like this area slides about every 10 years. The county still accepts building permits and lets them build. The before pic was about a 150' slide. The latest was 600'.
Heard on the radio today that it is even nick named "Slide Hill" because it slides so often.
Hopefully people were able to survive this mess.
Your post reminded me of all those Californians that build on top of a cliff and then are on the news... "Well when we built here we had no idea the erosion would continue and gravity would drag our house to the bottom. [facepalm]Quote:
Originally Posted by Rucker61
Risk of slide ‘unforeseen’? Warnings go back decades
Quote:
Since the 1950s, geological reports on the hill that buckled during the weekend in Snohomish County have included pessimistic analyses and the occasional dire prediction. But no language seems more prescient than what appears in a 1999 report filed with the U.S. Army Corps of Engineers, warning of “the potential for a large catastrophic failure.”
That report was written by Daniel J. Miller and his wife, Lynne Rodgers Miller. When she saw the news of the mudslide Saturday, she knew right away where the land had given way. Her husband knew, too.
“We’ve known it would happen at some point,” he told The Seattle Times on Monday. “We just didn’t know when.”
Daniel Miller, a geomorphologist, also documented the hill’s landslide conditions in a report written in 1997 for the Washington Department of Ecology and the Tulalip Tribes. He knows the hill’s history, having collected reports and memos from the 1950s, 1960s, 1980s and 1990s. He has a half-dozen manila folders stuffed with maps, slides, models and drawings, all telling the story of an unstable hillside that has defied efforts to shore it up.
That’s why he could not believe what he saw in 2006, when he returned to the hill within weeks of a landslide that crashed into and plugged the North Fork of the Stillaguamish River, creating a new channel that threatened homes on a street called Steelhead Drive. Instead of seeing homes being vacated, he saw carpenters building new ones.
“Frankly, I was shocked that the county permitted any building across from the river,” he said.
“We’ve known that it’s been failing,” he said of the hill. “It’s not unknown that this hazard exists.”