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during this period. The water level in well GP -4 has also recovered to pre -mine levels but observed <br />variable levels in 2004 through 2015. The decline in the fourth quarter is similar to other large <br />declines observed in this well. <br />Well GMP -1 (Figure A-9) is completed in the HI aquifer to monitor ground -water <br />conditions downgradient of the ash disposal site immediately south in A pit. Water levels became <br />steady in 2001 and stayed fairly steady for the next six years with a small increase in 2006 through <br />2011. A very gradual decline was observed in 2012 through 2015. <br />Figure A-10 also presents water levels for the well COY (alluvium). Water levels at the <br />COY well started to decline in 2009 and 2010 after seven years of overall rising. Overall water <br />levels rose in 2011 but overall declined in 2012 and were overall fairly steady in 2013 through 2015. <br />The unconfined alluvial aquifer generally responds gradual to recharge changes. The 2011 and <br />2012 water -level elevations are slightly lower than the natural high water levels in 1985 and 1986. <br />Well GP -5 is completed in the QR aquifer. GP -5 is immediately downgradient of A pit. <br />Water -level data from 2005-2015 is tabulated in Table A-1 in Appendix A (see attached CD for all <br />historical water -level data). Figure A-11 presents the water level versus time plot, showing a rising <br />trend for the previous six years during the period of above normal precipitation and fairly steady <br />water levels during the 2012 low precipitation year and a small decline in 2014 and 2015 with the <br />slightly above normal precipitation. These responses are interpreted to be due to an increase in <br />recharge followed by a decrease in recharge. These water levels show no response to the higher <br />precipitation in 2005 while a good response in shown to the higher 2006 through 2011 precipitation. <br />This data indicates that a one year lag in the water level responses in well GP -5 to precipitation may <br />occur. These responses indicate that the mining from the QR seams, which is nearest in the F pit <br />mining that began in 1997, has not significantly affected water levels in well GP -5. <br />Trapper Mining Company 2-8 <br />2015 Annual Report <br />