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• <br />• <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 10 <br />3.1 Monument Dam /Minnesota Reservoir Monitoring Data 11 <br />4.0 OVERVIEW OF SPRING 2011 FIELD STUDIES 13 <br />5.0 TRAVERSES AND OBSERVATIONS IN THE BOX CANYON, APACHE ROCKS, AND <br />SOD MINING AREAS 15 <br />5.1 Traverse A -A' Through H -H' 15 <br />5.2 Traverse I -I' 16 <br />5.2.1 Location 1 17 <br />5.2.2 Location 2 18 <br />5.3 Traverse J -J' 19 <br />5.4 Traverse K -K' 20 <br />5.4.1 Photographic Observation Point 12 21 <br />5.4.2 Location 3 23 <br />5.5 Traverse K1 -K1' 25 <br />5.5.1 Location 4 26 <br />5.5.2 Photographic Observation Point 13 27 <br />5.6 Traverse K2 -K2' 29 <br />5.7 Traverse K3 -K3' 30 <br />5.7.1 Location 5 31 <br />5.8 Traverse K4 -K4' 33 <br />5.8.1 Location 6 33 <br />5.8.2 Location 7 35 <br />5.8.3 Location 8 36 <br />5.9 Traverse L -L' 37 <br />5.10 Traverse L1 -L1' 39 <br />5.11 Location 9 39 <br />5.12 Photographic Observation Points 4 and 5 40 <br />5.13 Photographic Observation Point 6 40 <br />5.14 Photographic Observation Point 7 40 <br />5.15 Photographic Observation Point 9 42 <br />5.16 Traverse M -M' 42 <br />5.17 Photographic Observation Point 11 43 <br />5.18 Traverse N -N' 43 <br />6.0 CONCLUSIONS 44 <br />7.0 BIBLIOGRAPHY 47 <br />