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2.1.2 WATER -LEVEL CHANGES <br />Water -level changes for 2015 are presented in Figures A-1 through A-11 in Appendix A. <br />The table in Appendix A lists data from 2005 through 2015 and the historical data for the Trapper <br />Mine is presented on the attached CD. The wells are grouped on the water -level plots according to <br />aquifer where possible but, in most cases, are grouped by similar water -level elevations. Table A-1 <br />in Appendix A presents a tabulation of the water -level elevations for each of the monitoring wells. <br />Figure 2-1 presents the total annual precipitation at the Trapper Mine from 1978 through 2015. <br />Precipitation declined from a high in 1983 to a low in 1988 and had increased again to a peak in <br />1993 with a below average value in 1994. The years 1995 through 1997 had above average <br />precipitation relative to the Trapper Mine record, while 1998 through 2004 were below. The <br />precipitation in 2005 through 2011 was above or near normal while precipitation in 2012 was <br />slightly below the 1988, 1994 and 2002 low precipitation years and 2013 precipitation was equal to <br />the Trapper Mine average while 2014 and 2015 were slightly above. Water levels in many of the <br />wells reflect the natural variations in recharge. These changes may lag the actual precipitation <br />events due to the time it takes the head change to move through the aquifer to the monitoring well. <br />Figure A-1 presents water levels versus time for wells GF -5 and P-5. The wells are <br />completed in the HI backfill and 2nd White Sandstone aquifers, respectively. Water levels in well <br />GF -5 slightly rose in 2007 and 2008 and were steady in 2009 and 2010 and a small overall rise in <br />2011 and a very gradual decline in 2012 through 2015. Well P-5 went from being dry in early 2010 <br />to recovering four feet in late 2010 and 2011 but was dry in 2012 through 2015 except for the 4th <br />quarter in each of these years and three quarter in 2014. <br />The GC wells (GC -1, GC -2, GC -3, see Figure A-2) are located near the northeast corner <br />of the permit area (PA) slightly more than 1100 feet from mining activity in 2015. These wells are <br />completed in the HI, 3rd White and alluvial aquifers, respectively. The water -level changes in these <br />Trapper Mining Company 2-4 <br />2015 Annual Report <br />