Laserfiche WebLink
levels have been observed in the R coal the last five years. Data from well GLEV-2 shows that the <br /> alluvium is dry at this location. <br /> Figure A-7 presents water levels for GP-7 and GP-8, which are located very near the <br /> eastern boundary of the PA. They are completed in the HI and KLM aquifers and may provide <br /> undisturbed baseline data for these intervals but could be influenced by mining for the last few years. <br /> Water levels in well GP-7 overall have been steady for several years with a very slight decline in <br /> 2017 and going dry in mid-2018 through 2019. A slight increase was observed in 2010 and 2011 in <br /> well GP-8 after 3 years of steady water levels from 2007 through 2009. Water levels in well GP-8 <br /> gradually declined in 2015 through 2019 after gradually rising in 2014. Both of these water level <br /> changes are thought to be showing natural responses but could be influenced by the mining that is <br /> greater than 1900 feet away. <br /> Well GP-2 (Figure A-8) is located in a previously undisturbed area near the eastern <br /> boundary of the PA. Water levels rose in 2008 through 2011 in well GP-2 to a similar level as <br /> existed prior to 1999. A large decline in water levels started in 1999. A smaller decline occurred in <br /> 2012 through 2019, which is likely due to less recharge. <br /> Wells GP-3 and GP-4 are less than 1000 feet downgradient from A pit. Both are flowing <br /> wells completed in the HI and KLM aquifers, respectively. Water levels in these two wells had <br /> shown similar responses in water levels due to changes in precipitation but the 2005 through 2011 <br /> water level changes were different (see Figures A-9 and A-10). Water levels in well GP-3 have <br /> recovered to above pre-mine levels in this area and show that any depletion of water from upgradient <br /> mining has been replaced by recharge to the HI aquifer. The overall gradual declines in water levels <br /> in well GP-3 in the years just prior to 2005 are probably a function of below normal precipitation <br /> 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 2019. <br /> Trapper Mining Company 2-7 <br /> 2019 Annual Report <br />