PERMFILE132486

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 3/20/2007
• Doc Name: 2/1/2007 Geotechnical Report, BuckhornGeotech, ‎(Stability Evaluation of Coal Waste Pile No. 4)‎
• Section_Exhibit Name: Volume IX Coal Mine Waste Disposal Area No. 2
• Media Type: D
• Archive: No

TABLE OF CONTENTS
EXECUTIVE SUMMARY ....................................................................
1.0 INTRODUCTION ......................................................................
1.1 Scope of Services ...................................................................
2.0 PROJECT BACKGROUND ......................................................
2.1 Project Location .....................................................................
2.2 Site Conditions ........................................................................
2.3 Geology ....................................................'..............................
3.0 SITE INVESTIGATION ............................................................
3.1 Drilling Program .....................................................................
3.1.1 Gob Pile No. 4 .................................................................
3.1.2 Gob Pile No. 2 .................................................................
4.0 LABORATORY TESTING ........................................................
4.1 Index Properties ......................................................................
4.2 UU Triaxial Shear Testing ......................................................
4.3 CU Triaxial Shear Testing ......................................................
5.0 STABILITY EVALUATIONS ...................................................
5.1 Cross Sections and Geometry .................................................
5.2 Shear Strength Parameters ......................................................
5.3 Findings of Stability Evaluations ............................................
6.0 CONCLUSIONS AND RECOMMENDATIONS .....................
7.0 REFERENCES ...........................................................................
8.0 CLOSING ...................................................................................
APPENDICES

APPENDIX A
APPENDIX B
APPENDIX C
APPENDIX D
APPENDIX D.1
APPENDIX D.2
APPENDIX E
APPENDIX E.1
APPENDIX E.2
APPENDIX E.3
Bowie Gob Pile No. 4 stability report
Project #OS-126-GEO
Page 2 of IS
VICINITY MAP AND SITE PLAN DRAWINGS
LOGS OF EXPLORATORY DRILLING
LABORATORY INDEX TEST RESULTS
TRIAXIAL SHEAR TEST RESULTS
UU TRIAXIAL SHEAR TEST RESULTS
CU TRIAXIAL SHEAR TEST RESULTS
LIMIT EQUILIBRIUM STABILITY ANALYSIS OUTPUT
SUBGRADE EXCAVATION ANALYSES
2.SH:1V SUGRADE EXCAVATION ANALYSES
2H:1 V SUBGRADE EXCAVATION ANALYSES
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