Avalanche: Toll Canyon 2/21/2010

Observer Name:

Keith Clapier

Observation Date:

02/22/2010

Occurrence Date:

02/21/2010

Occurrence Time:

Unknown

Region:

Salt Lake
Parleys Canyon
East Canyon
Toll Canyon

Avalanche Characteristics

Elevation:

7600'

Aspect:

North

Northeast

Trigger:

Skier

Avalanche Type:

Soft Slab

Weak Layer:

Surface Hoar

Depth (avg):

unknown

Depth Range:

6" to

Width:

Unknown

Width Range:

125' to

Vertical:

60'

General Comments

blue bird

I observed an avi in Toll Bowl #3 in Toll Cyn today. Note: Toll Cyn drains into East Cyn. Avi probably occurred 2/21/10. Human triggered, intentional???? Slope is around 30o, aspect NNE and approx 7,600 ft. in elevation. Size is 6"-24" (some wind loading because it sits below a saddle) X 120' X 60'. Avi has a thunderbolt configuration, thus the 120' width . Weak layer is apparent surface hoar. Note: I've been skiing in Toll cyn for 12 yrs with over 800+ days and I've seen this bowl slide only 1 or 2 times in those 12 yrs.
k