Laserfiche WebLink
steady in 2001 and stayed fairly steady for the next six years with a small increase in 2006 through <br />2008. <br />Figure A-10 also presents water levels for the well COY (alluvium). Water levels at the <br />COY well overall rose in 2008 similar to a rate in previous years. The unconfined alluvial aquifer <br />generally responds gradually to recharge changes. The 2008 water-level elevations are slightly <br />higher 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 is tabulated in Table A-1 in Appendix A. Figure A-11 presents the water level <br />versus time plot, showing a rising trend for the last three years during the period of above normal <br />precipitation which was preceded by fairly steady levels during the below normal precipitation <br />period. These responses are interpreted to be due to a decrease in recharge followed by an increase <br />in recharge during the last four years. These water levels show no response to the higher <br /> precipitation in 2005 while a good response in shown to the higher 2006 through 2008 <br /> precipitation. This data indicates a one year lag in the water level responses in well GP-5 to <br />precipitation. These responses indicate that the mining from the QR seams, which is nearest in the <br />F pit mining that began in 1997, has not significantly affected water levels in well GP-5. <br />Figure A-11 presents the change in water-level elevation for alluvial well P-1, located in <br />the Pyeatt drainage north of the PA. This data demonstrates classic seasonal responses, highs in <br />winter/spring and lows in late summer/fall. Overall the water levels were similar in 2008 with a <br />rise in the first half of 2008 and a gradual decline in the second half. Well P-3 is completed in the <br />Lewis Shale outcrop, which is in contact with the Pyeatt alluvium. It had demonstrated the same <br />seasonal variations (Figure A-11) as the alluvial P-1 well but has recently been dry. <br />Water-level elevations for the Johnson Gulch alluvial well J-1 are also presented in <br />Figure A-11. The J-1 water levels remained steady in 2008. <br />0 Trapper Mining Company 2-7 <br />2008 Annual Report