2007-11-30_REPORT - C1980007 - Laserfiche WebLink

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~ sn ~' ~~ t r ~~ TABLE OF CONTENTS ~~~ ~ .F , . ~ ~u07 Di P e aa visw„ " 1.0 . . ,~c:~~arnatlo SUMMARY OF MAJOR FINDINGS .....................................................MlNnga~.s ....tL1 ~~ 2.0 FIELD RECOGNITION OF SUBSIDENCE AND NON-SUBSIDENCE FEATURE 4 THE WEST ELK MINE AREA ......................................................................................... 4 1 Subsidence Cracks and Compression Features ............................................................... 2 .. . 2.2 Construction Cracks .......................................................................................................... ..5 6 2.3 Desiccation Cracks ............................................................................................................ .. 8 2.4 Gravity-Induced Cracks ..................................................................................................... .. 9 3.0 SUBSIDENCE PREDICTION .......................................................................................... 10 1 E1 Panel Subsidence Monitoring Grid ............................................................................... 3 . 2 Stream Channel Baseline Data for Dry Fork ..................................................................... 3 10 4.0 . OVERVIEW OF FALL 2007 FIELD STUDIES ............................................................... 12 0 5 TRAVERSES AND OBSERVATIONS IN THE BOX CANYON, APACHE . ROCKS, AND SOD MINING AREAS ............................................................................ 14 5.1 Traverse A-A' ..................................................................................................................... ' 14 15 ..................................................................................................................... 5.2 Traverse B-B 2.1 Location 1 (Location 2 of the Spring 2007 Field Visit) .....................................15 5 . 5.2.2 Location 2 (Location 3 of the Spring 2007 Field Visit) .................................... .17 5.3 Traverse C-C' .................................................................................................................... 5.3.1 Location 3 (Location 5 of the Spring 2007 Field Visit) .................................... .19 .19 5.3.2 Photographic Observation Point 1 .................................................................. .25 5.3.3 Location 4 ....................................................................................................... 3.4 Location 5 (Location 4 of the Spring 2007 Field Visit) .................................... 5 .27 .28 . 5.4 Traverse D-D' .................................................................................................................... .30 ............................... 5.4.1 Photographic Observation Point 2 .30 .................................... 5.4.2 Location 6 ....................... 5.4.3 Location 7 (also D' and Photographic Observation Point 2) ........................... .31 5.5 Traverse E-E' .................................................................................................................... .32 33 5.5.1 Photographic Observation Point 3 .................................................................. . 5.5.2 Location 8 (Location 9 of the Spring 2007 Field Visit) .................................... .34 5.6 Photographic Observation Point 6 (Location 11 of the Spring 2007 Field Visit) ................~~ 5.7 Traverse F-F' ................................................................................................................ 7.1 Location 9 (Location 12 of the Spring 2007 Field Visit) ...................................43 5 . 5.7.2 Location 10 (Location 14 of the Spring 2007 Field Visit) ............................... ..44 5.7.3 Location 11 (Location 15 of the Spring 2007 Field Visit) ............................... ..45 5.8 Traverse G-G' .................................................................................................................. ..45 46 9 Location 12 (Location 17 of the Spring 2007 Field Visit) ................................................. 5 .. . 5.10 Photographic Observation Point 7 ................................................................................... ' ..50 53 ................................................................................................................... 5.11 Traverse H-H .. 53 5.11.1 Photographic Observation Point 8 ................................................................. .. 12 Location 13 (Location 19 of the Spring 2007 Field Visit) ................................................. 5 ..55 . 13 Photographic Observation Point 9 ................................................................................... 5 ..57 . 13.1 Landslide Located East of the Mouth of Box Canyon .................................... 5 ..57 . 13.2 Landslide Located West of the Mouth of Box Canyon .................................. 5 ..57 . 5.14 Traverse I-I' ........................................................................................................................59 61 6.0 CONCLUSIONS ............................................................................................................ 63 7.0 BIBLIOGRAPHY ......................................................................................................... ..