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May 28, 2009 Page i <br />K-PIT BUTTRESS FILL STABILITY ANALYSIS RECEIVED <br />TRAPPER MINE, COLORADO JUN 0 0 2009 <br />uon. <br />nltiDivision 01 and Safety <br />ning <br />TABLE OF CONTENTS <br />1.0 INTRODUCTION AND BACKGROUND .......................................................................1 <br />2.0 SLOPE STABILITY ANALYSIS ....................................................................................1 <br />2.1 Model Geometry ..................................................................................................2 <br />2.2 Methodology ........................................................................................................7 <br />2.3 Material Properties ...............................................................................................7 <br />2.4 Boundary Conditions ...........................................................................................8 <br />3.0 ANALYSIS RESULTS ....................................................................................................9 <br />3.1 Mid-Section Model ..............................................................................................9 <br />3.2 East-Section Model ..............................................................................................9 <br />3.3 West-Section Model ...........................................................................................13 <br />4.0 CONCLUSIONS ...........................................................................................................15 <br />5.0 CONSTRUCTION INSPECTION .................................................................................15 <br />I certify that this report was prepared by me and by other engineers under my direct <br />supervision. <br />tlk%l0 9 km C ***n <br />c,? tiro <br />-"Martin W. Chenoweth, P.E. <br />Senior Associate <br />Agapito Associates, Inc. <br />37784 <br />N AL PROFESSIONAL SEAL <br />Agapito Associates, Inc.