2010-05-12_PERMIT FILE - C1981010

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 5/12/2010
• Doc Name: Revised K-Pit Butttress Fill Stability Analysis, Feb 2010
• Section_Exhibit Name: Appendix T
• Media Type: D
• Archive: No

February 1, 2010 Page i
REVISED K -PIT BUTTRESS FILL STABILITY ANALYSIS AND
RECOMMENDATIONS
TRAPPER MINE COLORADO
TABLE OF CONTENTS
Page
EXECUTIVE .................................................................... ..............................1
1.0 INTRODUCTION AND BACKGROUND ............................................ ..............................1
2.0 SLOPE STABILITY ANALYSIS ......................................................... ..............................2
2 .1 Model Geometry ........................................................................ ..............................3
2 .2 Methodology .............................................................................. ..............................3
2 .3 Material Properties ..................................................................... ..............................3
3 .0 ANALYSIS RESULTS .......................................................................... ..............................5
3 .1 K -Pit Mining Analysis ............................................................... ..............................5
3.2 Revised K -Pit Buttress Analysis ................................................ ..............................6
4.0 SUMMARY AND CONCLUSIONS ...................................................... ..............................7
5 .0 REFERENCES ...................................................................................... ..............................8
I certify that this report was prepared by me and by other engineers under m direct
supervision. �.� REG �x
l
N - 1 e eO
37784 ay;
_• Ck
� - MA1.E�
Martin W. Chenowcth, P.E. PROFESSIONAL SEAL
Senior Associate
Agapito Associates, Inc.
Agapito Associates, Inc.