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West Elk Mine <br />• groundwater effects resulting from this mining method. These monitoring wells include SOM <br />38-H-1, SOM C-72-H, and SW-1 through SW-6 and JMB-12. <br />The 1NW Panel was the first panel mined using the longwall mining technique. Complete <br />mining of this panel took approximately nine months (i.e., July 24, 1992, to May 1, 1993). <br />Figure 24 shows the observed water levels in monitoring well SOM 38-H-1, including the <br />advancement of this longwall panel directly under the well (July 1992 through November 1992). <br />During this time there were no observed water level fluctuations. <br />• <br />• <br />1.05-165 Revised June 1005 PRIO; Rev. March 1006; Rev. May 1006 PRI G <br />