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West Elk Mine 2006 Annual Hydrology Report 24 <br />3.3 Ground Water Monitoring <br />Currently, there are 28 monitored wells in the Project's ground water monitoring plan, including <br />the SOM-23-H-1 (completely obstructed in August 2006), SOM-23-H-2, SOM-23-H-3, and SOM- <br />23-H-4 wells that MCC re-introduced -into the monitoring program in 2005. Well SOM-23-H-1 <br />was monitored in 2005, however, although there was audible water flowing in well, the well casing <br />was damaged at depths of 135 feet, 145 feet, and 190 feet and it was completely obstructed at 243 <br />feet (original depth was 604 feet). As a result, monitoring data collected from SOM-23-H-1 is <br />suspect and this well will not be monitored in the future. <br />In September 2003, MCC installed five monitoring wells (Upper Dry Fork Alluvial, Lower Dry <br />Fork Alluvial, SOM-3E, SOM-3B, and 03-11-1). Baseline data for these wells were collected from <br />October 2003 to September 2004 and are presented in the 2004 Annual Hydrology Report <br />(HydroGeo, 2005) and shown in Appendix C. <br />The ground water monitoring wells are divided into the following 6 categories for discussion <br />purposes: <br />o Facility Area Wells and Alluvial Wells <br />o Wells completed in the Barren Member above the F Seam <br />o Wells completed in the F Seam <br />o Wells completed in the E Seam <br />o Wells completed above the E Seam <br />o Wells completed in the B Seam <br />The locations of the ground water monitoring wells are shown on Map 2. A summary of the <br />ground water monitoring well characteristics is presented in Table 5 and a summary of the ground <br />water monitoring program is presented in Table 6. <br />• <br />December 2007 HydroGeo, Inc. <br />