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III IIIIIIIIIIIIIIII <br />RECEIVED <br /> <br />APPENDIX J <br />2001 ADDENDUM TO <br />Mountain Coal Company, L.L.C., West Elk Mine <br />1997/98 Landslide Corrective Measures Report <br />Table of Contents <br />• <br />• <br />J1.0 Invoduction ..................................................................................... <br />J2.0 Characterization of Landslide .......................................................... <br />J3.0 Corrective Measures ..................................................................... <br />J3.1 On Going and Potential Corrective Measures ........................... <br />J4.0 Analyses of Corrective Measures .................................................. <br />J4.1 Groundwater Analyses ............................................................. <br />J4.2 Limit Equilibrium Slope Stability Analyses ............................. <br />]4.3 Pin (Micro-Pile Analyses) ........................................................ <br />J4.4 RCC Butvess ........................................................................... <br />J5.0 Summary of Selected Monitoring Information ........................... <br />J5.1 Surface Monitoring Points .................................................... <br />J5.2 Piezometers ........................................................................... <br />J5.3 Incl inometers ......................................................................... <br />]5.4 Stone Columns ...................................................................... <br />J5.5 Load Cells on RCC Butvess ................................................. <br />]6.0 Discussion of Stability for Existing Conditions .................................. <br />DEC 1 9 2001 <br />Division of Minerals and Geology <br />.................... 1 <br />...................... 2 <br />.......................... 4 <br />.......................... 5 <br />............................ 7 <br />............................ 7 <br />............................ 7 <br />............................ 8 <br />............................ 8 <br />............... 13 <br />J7.0 Discussion of Stability for Long-Term Conditions Based on Current Conditions to Nov. 2001........ 14 <br />J7.1 Validity of Models ........................................................................................................................ 14 <br />J7.2 Risk Analysis and the Probability of future Landslide Outcomes ................................................. 14 <br />J7.3 Future Monitoring ......................................................................................................................... 16 <br />Barr Englneering Company <br />PCDOCSt230503/CAK <br />December 75, 2000 <br />i Appendix J <br />2001 Addendum to <br />1997/99 Lendsllde Corrective Measures Report <br />