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zephyr aka friendly hiker
Joined: 21 Jun 2009 Posts: 3370 | TRs | Pics Location: West Seattle |
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zephyr
aka friendly hiker
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Sat Dec 05, 2015 10:37 pm
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I don't think this has been posted yet. It's pretty cool. I wondered about the destruction of the old snow sheds on I-90 near Keechelus Lake. Here's what's replacing them--an avalanche bridge. Little video clip from KOMO News via WSDOT's Twitter that I found tonight. ~z
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LizzyRN Member
Joined: 16 Aug 2013 Posts: 204 | TRs | Pics Location: Mount Vernon |
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LizzyRN
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Sat Dec 05, 2015 11:55 pm
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LizzyRN
Where's my inhaler?!
LizzyRN
Where's my inhaler?!
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Randito Snarky Member
Joined: 27 Jul 2008 Posts: 9512 | TRs | Pics Location: Bellevue at the moment. |
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Randito
Snarky Member
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Sun Dec 06, 2015 12:54 pm
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Your tax dollars at work..
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meandering Wa Member
Joined: 25 Jun 2010 Posts: 1516 | TRs | Pics Location: Redmond |
now that you see it, seems so obvious from the get go.
I have been puzzled by what that upper elevation work was and now I see.
I wonder how the more open viewlines will impact the traffic plug that so often happens here on Sundays
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zephyr aka friendly hiker
Joined: 21 Jun 2009 Posts: 3370 | TRs | Pics Location: West Seattle |
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zephyr
aka friendly hiker
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Sun Dec 06, 2015 2:37 pm
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I was always curious as to why the snow sheds only covered the west bound lanes. There's a lot more information here on this WSDOT site with some great graphics. Here's a quote:
The most persistent avalanche zone through Snoqualmie Pass is east of the summit along Lake Keechelus. This area is known as the East Shed.
While a snow shed provides passive protection for the westbound lanes below two avalanche paths, the eastbound lanes are not covered. When active control is required there, we stop traffic a safe distance away from the foot of the avalanche zone. A "sweeper" vehicle drives through to ensure that no vehicles are still inside the zone. Once the area is clear, cable trams deliver the explosives to the top of the avalanche paths where they’re detonated, allowing our technicians to remain at a safe distance.
It goes on to say more about the explosive charges used and their means of delivery. Options range from snowshoes and hand charges to snowmobiles and snow cats. Technicians will often use surplus military artillery to deliver explosives to the top of otherwise inaccessible avalanche paths.
~z
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ScottP Member
Joined: 01 Jul 2003 Posts: 397 | TRs | Pics
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ScottP
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Sun Dec 06, 2015 4:24 pm
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touron Member
Joined: 15 Sep 2003 Posts: 10293 | TRs | Pics Location: Plymouth Rock |
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touron
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Sun Dec 06, 2015 6:25 pm
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On our childhood trips east of the mountains, we would always try to hold our breaths:
1. Through the I-90 Mt Baker tunnels
2. Across the floating bridge
3. Through the snowshed tunnel
Touron is a nougat of Arabic origin made with almonds and honey or sugar, without which it would just not be Christmas in Spain.
Touron is a nougat of Arabic origin made with almonds and honey or sugar, without which it would just not be Christmas in Spain.
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I'm Pysht Member
Joined: 11 Jul 2007 Posts: 517 | TRs | Pics Location: Pacific NW |
We'd try to hold our breath through our regular trips through Tacoma.
[Stinky emoticon goes here]
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Brucester Member
Joined: 02 Jun 2013 Posts: 1102 | TRs | Pics Location: Greenwood |
Cheaper to build than that downtown tunnel! What's wrong with bridges?
Beefy supports beneath the bridge? Rocks and lumber can't be nice to concrete?!
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