PERMFILE123352

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 60 Subsidence Evaluation for Apache Rocks Mining Area & Box Canyon Lease Tract
• Media Type: D
• Archive: No

LIST OF FIGURES

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Figure I Conceptual Diagram Showing Subsidence Processes
Figure 2 Diagram Showing Subsidence Profile and Parameters
Figure 3 Graph Showing Subsidence Factors
Figure 4 Graph Showing Maximum Tilt and Horizontal Strain
Figure Sa North Transverse Subsidence Profile at the West Elk Mine (West to East)
Figure 56 South Transverse Subsidence Profile at [he West Elk Mine (West to East)
Figure Sc Longitudinal Subsidence Profile at the West Elk Mine (South to North)
Figure 6 Comparison of Model Predictions to Observed Subsidence
Figure 7a Subsidence Model Profiles far Apache Rocks West
Figure 76 Subsidence Model Profiles for Apache Rocks East
Figure 7c Subsidence Model Profiles for the Box Canyon Mining Area
Figure 8 Subsidence Development Curves
Figure 9 Cross-Section Through [he Oliver No. 2 Mine
LIST OF TABLES
Table I Maximum Subsidence Parameters, West Elk Mine
Table 2 Maximum Subsidence Parameters, Apache Rocks Mining Area
Table 3 Maximum Subsidence Parameters, Box Canyon Mining Area
LIST OF MAPS
Map I Apache Rocks and Box Canyon Area Delineation Map
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