Avalanche: Pfeifferhorn 6/20/2011

Observer Name: 
Craig Gordon/Ted Scroggin
Observation Date: 
06/28/2011
Occurrence Date: 
06/20/2011
Occurrence Time: 
Unknown
Region: 
Salt Lake
Little Cottonwood Canyon
Pfeifferhorn
Location Name: 
Pfeifferhorn
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Location

40° 32' 2.2524" N, 111° 42' 18.2844" W
Avalanche Characteristics
Elevation: 
10900'
Slope Angle: 
37
Trigger: 
Natural
Avalanche Type: 
Wet Slab
Weak Layer: 
Wet grains
Depth (avg): 
4.5'
Depth Range: 
4.5 to '
7'
Width: 
Unknown
Width Range: 
350' to
450'
Vertical: 
600'
General Comments

It's not too often you get to geek out and investigate a deep slab avalanche late in June. Clearly visible from upper elevations on the north side of LCC, this large slide obviously caught our eye. My good friend and Uinta colleague Ted Scroggin made the trip down from Evanston, joining me on my annual Wasatch ski holiday and we took a stroll up Maybird to take a look.

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General Comments 2

Triggered by a large piece of rock peeling off the cliffs, the snowpack received a sudden nuclearesque impact and would have been nearly impossible for a person to initiate a slide of this magnitude.

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General Comments 3

This was an impressive slide and both Ted and I were interested to see if the MLK raincrust was a player. We dug around in several portions of the crown and interestingly enough, were able to identify the crust still quite visible near the bed surface. While no one was present to witness the slide, we suspect the combination of water pooling on the slick crust, combined with the perfect timing of a ginonormous trigger was the culprit behind this unusual avalanche. Of interesting note- a similar event occurred in May 2006 above Cecret Lake.... a large rockfall peeling off Sugarloaf Peak was the trigger in that event.

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General Comments 4

This slide was packin' heat, jumping over a well defined stauchwall, running well into low angle terrain.

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