Avalanche: Egan Basin

Observation Date
Friday, January 11, 2019
Avalanche Date
Tuesday, January 8, 2019
Region
Egan Basin
Location Name or Route
Egan Basin
Elevation
9,000'
Aspect
Northeast
Slope Angle
35°
Trigger
Snowmobiler
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
New Snow/Old Snow Interface
Depth
16"
Width
30'
Vertical
400'
Comments
We rode in the Beaver Creek Area today.  While riding, we notice a small slab avalanche likely triggered by a snowmobiler 2-3 days ago.  The slide was approximately 30 feet wide and ran around 400 vertical feet.  It occurred on a northeast facing slope around 9000 feet.  The failure occurred on the interface between old and new snow and most likely failed on the buried surface hoar from last week. 
 
We did not observe any other signs of instability throughout the day.  We tested several step rollovers with no problems.

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