2009-12-28_PERMIT FILE - C1996083

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 12/28/2009
• Doc Name: 5/18/2009 Revised Stability Evaluation of Coal Mine Refuse Disposal Area No. 4, BuckhornGeotech,
• Section_Exhibit Name: Volume IX Coal Mine Waste Disposal Area No. 2
• Media Type: D
• Archive: No

TABLE OF CONTENTS •
1.0 INTRODUCTION ......................................................................... ............................... 3
2.0 PROJECT BACKGROUND.. ............................................................ ..............................3
3.0 GEOTECHNICAL INVESTIGATION ................................................ ............................... 4
4.0 SUMMARY OF PREVIOUS STRENGTH TESTING ............................ ............................... 6
5.0 STABILITY EVALUATIONS ........................................................... ..:............................ 7
5.1 Model Geometry ..................................................................... ............................... 7
5.2 Material Properties .................................................................. ............................... 8
5.3 Pore Pressure Conditions ......................................................... ............................... 9
5.4 Stability Evaluations .............................................................. ............................... 10
6.0 CONCLUSIONS AND RECOMMENDATIONS ................................. ............................... 11
7.0 REFERENCES ........................................................................... ............................... 12
8.0 CLOSING ................................................................................. ............................... 12
APPENDICES
APPENDIX A
DRAWINGS
APPENDIX B
GEOTECHNICAL BOREHOLE LOGS
APPENDIX C
CU TRIAXIAL SHEAR RESULTS
APPENDIX E
LIMIT EQUILIBRIUM STABILITY ANALYSIS OUTPUT
0
U
Bowie No 2 Refuse Pile No 4 2009 Revised stability.doc
Project #06- 481 -003
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