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• <br />TABLE OF CONTENTS <br />Page <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 .........................................................................................4 <br /> 2.1 Subsidence Cracks and Compression Features .............................................................. ...4 <br /> 2.2 Construction Cracks ......................................................................................................... ... 5 <br /> 2.3 Desiccation Cracks ........................................................................................................... ...6 <br /> 2.4 Gravity-Induced Cracks .................................................................................................... ...7 <br />3.0 SUBSIDENCE PREDICTION ..........................................................................................9 <br />4.0 OVERVIEW OF SPRING 2008 FIELD STUDIES .......................................................... 11 <br />5.0 TRAVERSES AND OBSERVATIONS IN THE BOX CANYON, APACHE ROCKS, AN D <br /> SOD MINING AREAS ................................................................................................... 14 <br /> 5.1 Traverse A-A..................................................................................................................... . 14 <br /> 5.1.1 Location 1 ....................................................................................................... .15 <br /> 5.1.2 Photographic Observation Point 8 (Alternate Location 8A) .............................16 <br /> 5.2 Traverse B-B...................................................................................................................... 18 <br /> 5.3 Traverse C-C' ....................................................................................................................19 <br /> 5.3.1 Location 2 ........................................................................................................20 <br /> 5.4 Traverse D-D' .................................................................................................................... 20 <br /> 5.4.1 Location 3 ........................................................................................................ 21 <br /> 5.4.2 Location 4 ........................................................................................................ 22 <br /> 5.5 Traverse E-E...................................................................................................................... 24 <br /> 5.5.1 Location 5 Location 3 of the Fall 2007 Field Visit <br />5.5.2 Photographic Observation Point 1 ................................................................... 24 <br />30 <br /> 5.5.3 Location 6 (Location 5 of the Fall 2007 Field Visit) ......................................... 30 <br /> 5.5.4 Location 7 ........................................................................................................ 31 <br /> 5.6 Traverse F-F...................................................................................................................... 32 <br /> 5.6.1 Location 8 ........................................................................................................ 32 <br /> 5.6.2 Photographic Observation Point 2 ................................................................... 35 <br /> 5.6.3 Location 9 ........................................................................................................ 36 <br /> 5.7 Traverse G-G..................................................................................................................... 37 <br /> 5.8 Traverse H-H' .................................................................................................................... 37 <br /> 5.8.1 Location 10 ...................................................................................................... 38 <br /> 5.8.2 Photographic Observation Point 3 ............................................................................ 38 <br /> 5.8.3 Location 11 ...................................................................................................... 41 <br /> 5.8.4 Photographic Observation Point 4 ................................................................... 43 <br /> 5.8.5 Photographic Observation Point 5 ................................................................... 44 <br /> 5.9 Traverse 1-1' ....................................................................................................................... 45 <br /> 5.10 Traverse J-J....................................................................................................................... 46 <br /> 5.11 Traverse K-K...................................................................................................................... 46 <br /> 5.12 Traverse L-L' ..................................................................................................................... 47 <br /> 5.12.1 Location 12 ...................................................................................................... 47 <br /> 5.12.2 Location 13 ...................................................................................................... 48 <br /> 5.13 Photographic Observation Point 6 ..................................................................................... 49 <br /> 5.14 Photographic Observation Point 7 ..................................................................................... 52 <br /> 5.15 Location 14 (Location 12 of the Fall 2007 Field Visit) ........................................................ 53 <br /> 5.16 Photographic Observation Point 9 ..................................................................................... 56 <br /> 5.16.1 Landslide Located East of the Mouth of Box Canyon ..................................... 56 <br /> 5.16.2 Landslide Located West of the Mouth of Box Canyon .................................... 57 <br /> 5.17 Traverse M-M' ................................................................................................................... 58 <br />5.17.1 Photographic Observation Point 10 .................................................................59 <br />5.18 Photographic Observation Point 11 (Location 13 of the Fall 2007 Field Visit) ..................59 <br />6.0 CONCLUSIONS ............................................................................................................61