11th Annual Utah Snow & Avalanche Workshop Open and Motorized Sessions Oct. 27th.
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Observer Name: 
Art Bingham
Observation Date: 
Tuesday, December 26, 2017
Avalanche Date: 
Tuesday, December 26, 2017
Region: 
Chalk Creek
Location Name or Route: 
Chalk Creek / Coalville Powerplant access
Elevation: 
8500
Aspect: 
North
Slope Angle: 
46
Trigger: 
Snowmobiler
Trigger: additional info: 
Unintentionally Triggered
Avalanche Type: 
Soft Slab
Avalanche Problem: 
New Snow
Weak Layer: 
Ground Interface
Depth: 
16"
Width: 
60
Vertical: 
400
Carried: 
1
Caught: 
1
Buried - Fully: 
1
Injured: 
1
Snow Profile Comments: 
New snow came off a steep slope 40 to 50 % grade and pushed down into a 30 to 35% grade. The unloaded snow from above was the source of all the fill snow. Stay away from areas that have cliffs above. Several none triggered avalanches in the area all on North and east face slopes. Crown of the slide was 14 to 16 inches thick.
Comments: 
Rider was carried about 80 to 90 feet and his head was about 1 foot under snow surface. Found within 60 seconds due to the corner of his airbag sticking out of the snow about 2 inches. Body position was vertical. Found without his helmet. He was wearing a ABS air bag and beacon was functioning. Rider was blindsided from behind and did not recall pulling his cord. Airbag was deployed. Injuries to victim, a broken hand, mild shock and chills. Sled was 4 feet under the snow. Sled was a total loss. Banged into rocks and a tree.
Coordinates: 
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