Re: Major bridge outage reported on Facebook
#Conditions
Lange :
Packraft ??
I love that very stretch of the river south of MTR and also MTR :( that is unfortunately out I suppose, not to mention Evo and Muir ( of course I could venture up and back
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Karina Bezkrovnaia
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#76684
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Re: Speculating on the SFSJ bridge
This bridge of similar construction over Dusy branch shows a minor twist on the upstream side, since quite some years. Possibly caused by logs?
Gesendet: Sonntag, 23. April 2023 um
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Henning Rech
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#76683
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Re: Speculating on the SFSJ bridge
Most plausible failure mechanism to me is an extremely heavy, wet snow load that got lopsided as the upstream side melted, twisting the bridge until it buckled. Might have been aided by a strong wind
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Mike Sherman
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#76682
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Re: Major bridge outage reported on Facebook
#Conditions
The first nobo PCT hikers will be there next month, probably. Earlier than any ranger.
Henning
Gesendet: Sonntag, 23. April 2023 um 04:43 Uhr
Von: "Lange Jorstad via groups.io"
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Henning Rech
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#76681
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Re: Major bridge outage reported on Facebook
#Conditions
Might be a good year for MOBO’s - do half the trail and come out before the bridge, then get a second permit to do the other part of the trail from a different trailhead (acknowledging that
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Lange Jorstad
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#76680
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Re: Safely crossing the creek at the SFSJ bridge, what about this method?
Also, I wonder about this idea in the time frame after mid-July. Not before
such.
Sent from Gmail Ipad See my Google Profile for interesting research links:
http://tinyurl.com/3vnolh8
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Roleigh Martin
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#76679
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Re: Speculating on the SFSJ bridge
Seems plausible some dynamic force is the cause but hard to imagine an avalanche was the culprit as there is no damage to even the smallest of trees in the photos.
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Chris Armstrong
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#76678
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Re: Safely crossing the creek at the SFSJ bridge, what about this method?
Also it is often the case water levels in the high sierra are lowest in the early morning too. Twice I crossed in the early morning.
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Roleigh Martin
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#76677
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Re: Major bridge outage reported on Facebook
#Conditions
I hope there will be some accommodation by the rangers for hikers routing around the bridge. Bad decisions often stem from hikers weighing up a short, risky choice (like crossing a damaged bridge,
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Lange Jorstad
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#76676
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Safely crossing the creek at the SFSJ bridge, what about this method?
I have done the JMT 11 times in the last 20 years. The years 2011 and 2017
involved a lot of hiking on snow and high creek crossings. I have crossed
creeks that were up to my waist in water.
I also
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Roleigh Martin
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#76675
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Re: Speculating on the SFSJ bridge
I would guess dynamic forces (like an avalanche) would be the culprit - seems like a bridge like this would be designed to manage a winter snow load, even a big one.
I’ll be curious to see how close
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Lange Jorstad
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#76674
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Re: Speculating on the SFSJ bridge
An older and longer bridge on the MFSJ failed back in 1997, they managed to get it back into service the next year before proper repairs could be made. While I don't know if the failure this year
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Nathan
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#76673
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Re: Speculating on the SFSJ bridge
I'm reading the photo as:
-right (downstream) handrail buckled and kinked outwards severely, twisting the bridge
-left handrail rotated about 45 degrees in the middle, with perhaps a kink in the
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Mike Sherman
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#76672
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Re: Speculating on the SFSJ bridge
Chris,
Some people know how to look at pics ! I didn’t notice the shadow :) you are right that it doesn’t look sitting in the river ?
Karina Bezkrovnaia
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Karina Bezkrovnaia
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#76671
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Speculating on the SFSJ bridge
Ok, admitedlly pure speculation on may part but I've zoomed in on the picture of the SFSJ River bridge and to me, it looks like the bridge is still suspended well above the river. From the overhead
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Chris Armstrong
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#76670
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Re: Major bridge outage reported on Facebook
#Conditions
Regarding the Reddy's Hole option... I've seen that route marked as well,
but haven't had a chance to explore it. That said, there are no junctions
at either end that indicate the start/end of the
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Elizabeth Wenk
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#76669
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Re: Major bridge outage reported on Facebook
#Conditions
I think this is the last picture of Wayne Peferdehirt on Mather before his fall. The stretch of remaining snow that he slipped on was apparently very short -? a few yards
1
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John Curran Ladd
San
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John Ladd
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#76668
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Re: Major bridge outage reported on Facebook
#Conditions
I think this was just bad luck and maybe missing attention in the early morning around 7am.
https://kb.wisconsin.edu/images/group171/95769/717-MemorialResolutionforWaynePferdehirt.pdf
Was
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Henning Rech
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#76667
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Re: Major bridge outage reported on Facebook
#Conditions
Ravi,
Whether continued entrance interrupted by the road will be allowed remain to be seen.
That if not it will send hundreds of people into uncharted terrains - for sure. Worse even - this is the
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Karina Bezkrovnaia
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#76666
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Re: Major bridge outage reported on Facebook
#Conditions
I have done the Tyee hike and it's quite doable and scenic, as described in my earlier email. Good solution for those who want to avoid a lotta road walking, hitching or arranging a shuttle.
By
Marion Davison
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#76665
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