- Date: 2013/03/23
(Estimated)
- Observer: Marcus Dreux
- Area Description: East Ptarmigan Hill
- Landmark: Vail Pass
- Average Slope Angle: 35 °
- Maximum Slope Angle: 40 °
- Elevation: 12000 ft
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- Sliding Surface: I - New/Old Interface
- Weak Layer: Unknown
- Average Crown: 12 in
- Maximum Crown: 15 in
- Average Width: 70 ft
- Maximum Width: 100 ft
- Average Vertical: 100 ft
- Maximum Vertical: 100 ft
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