PERMFILE52052

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 14C 1997/98 Landslide Corrective Measures
• Media Type: D
• Archive: No

Mountain Coal
West EIk Mine
Existing Landslide
Risk Analysis
Table of Contents
1.0 Introduction ............................................................. 1
2.0 Probability Based Upon the Factor of Safety Analyses ............................. 2
2.1 Pre-Correction Shear Strength of the Soil .................................... 2
22 Shear Strength of the Pins (Micropiles) ...................................... 2
2.3 Post Correction Factor of Safety ............................................ 3
2.4 Coefficient of Variation of the Sheaz Strength ................................. 3
2.5 Probability of Landslide Outcomes .......................................... 3
3.0 Probability Based Upon Observed Landslide Movements ........................... 5
3.1 Velocity of Landslide .................................................... 5
3.2 Landslide Velocity Class (LVC) ............................................ 5
3.3 Coefficient of Variation .................................................. 5
3.4 Probability of Landslide Outcomes .......................................... 6
4.0 Summary ................................................................ 7
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0626024\60558-1/CET 1