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2.1 GROUND WATER-LEVEL CHANGES " <br />2.1.1 SUMMARY <br />Significant mine activities during 1997 included the continued expansion of the A, <br />D and H pit areas. Mining of the M and Q seams started in the F (Flintlock) pit in 1997. Pit <br />D dewatering was 49 ac-ft in 1997, while the D pit dewatering wells volume of pumping was <br />35 ac-ft. Dewatering in the A and H pits was 17 and 6 ac-ft in 1997. <br />Annual precipitation for 1997 was above normal and larger than the site's 1996 <br />precipitation (Figure 2-1). The last three years of precipitation have been above normal. <br />Recharge in this geographic setting is directly related to precipitation. <br />The effects of natural recharge variations on the respective aquifers can be <br />observed in wells located in undisturbed areas away from the influence of mining activities. <br />Well GC-3 exhibited the alluvial water level response with a similar increase in 1997 due ~. <br />to recharge to that observed in 1995. The effects on the 3rd White aquifer are observed <br />in wells GC-2 and GP-9. These wells show awater-level rise in late 1995 and 1997, <br />indicating some lag from seasonal precipitation variations. The HI aquifer (GC-1, GP-7) is <br />characterized by fairly steady water levels for the last several years. The KLM aquifer (GP- <br />2, GP-8) has shown fairly steady water-level rise in 1997 with the exception of one outlier <br />from well GP-8. The rise over the last year was between one and two feet. The QR aquifer <br />response (GP-1) has been an overall rise in 1997 with increases of over three feet. <br />There were several water level increases observed in 1996 that exceed those <br />expected from natural variations and are responses to mine activities. Wells GE-1, GE-2 <br />and 81-03a had water level increases which were probably due to a decrease in dewatering <br />2-2 ', <br />