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TABLE OF CONTENTS <br />Pa4e <br />1.0 SUMMARY OF MAJOR FINDINGS ...................................................................................1 <br />2.0 FIELD RECOGNITION OF SUBSIDENCE AND NON-SUBSIDENCE FEATURES IN <br />THE WEST ELK MINE AREA .......................................................................................... 2 <br />2.1 Subsidence Cracks and Compression Features ................................................................ 2 <br />2.2 ConsVuction Cracks ............................................................................................................ 4 <br />2.3 Desiccation Cracks ............................................................................................................. 5 <br />2.4 Gravity-Induced Cracks ....................................................................................:................. 6 <br />3.0 SUBSIDENCE PREDICTION ............................................................................................ 7 <br />3.1 E1 Panel Subsidence Monitoring Grid ................................................................................ 8 <br />4.0 OVERVIEW OF SPRING 2007 FIELD STUDIES .............................................................9 <br />5.0 TRAVERSES AND OBSERVATIONS IN THE BOX CANYON, APACHE ROCKS AND <br />SOUTH OF DIVIDE MINING AREAS ........................................:.................................... 10 <br />5.1 Traverse A-A' .................................................................................................................... 11 <br />5.1.1 Location 1 ....................................................................................................... 11 <br />5.2 Traverse B-8' .................................................................................................................... 12 <br />5.2.1 Location 2 ....................................................................................................... 12 <br />5.2.2 Location 2a ..................................................................................................... 14 <br />5.2.3 Location 3 ....................................................................................................... 15 <br />5.3 Traverse C-C' .................................................................................................................... 16 <br />5.3.1 Location 4 ....................................................................................................... 17 <br />5.3.2 Location 5 ....................................................................................................... 18 <br />5.4 Traverse D-D' .................................................................................................................... 20 <br />5.4.1 Location 6 ....................................................................................................... 20 <br />5.4.2 Location 7 ....................................................................................................... 21 <br />5.5 Location 8 ....................................................................................................... 22 <br />5.6 Traverse E-E' .................................................................................................................... 22 <br />5.6.1 Location 9 ....................................................................................................... 23 <br />5.6.2 Location 10 ..................................................................................................... 25 <br />5.7 Location 11 ........................................................................................................................ 26 <br />5.8 Traverse F-F' ..................................................................................................................... 27 <br />5.8.1 Location 12 ..................................................................................................... 28 <br />5.8.2 location 13 ..................................................................................................... 29 <br />5.8.3 location 14 ..................................................................................................... 30 <br />5.8.4 Location 15 ..................................................................................................... 31 <br />5.9 Traverse G-G' ................................................................................................................... 32 <br />5.10 Traverse H-H' .................................................................................................................... 32 <br />5.10.1 Location 16 ..................................................................................................... 33 <br />5.11 Location 17 ..................................................................................................... 33 <br />5.12 Traverse I-I' ..................................:.................................................................................... 36 <br />5.12.1 Location 18 ..................................................................................................... 36 <br />5.13 Traverse J-J' ..................................................................................................................... 37 <br />5.14 Location 19 ........................................................................................................................ 37 <br />6.0 CONCLUSIONS .............................................................................................................. 38 <br />7.0 REFERENCES .......................................:........................................................................ 40 <br />