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2.7.5.3d Ground-Water Levels, I and J Pits <br /> The ground water elevations in the area of the I and J Pits are depicted in the most current Annual <br /> Hydrology Report (AHR). The water level elevation contours in the I and J Pits area are well defined in <br /> the AHR. Future analysis of the area will define the changes in water level elevations and will be <br /> included in Annual Hydrology Reports. <br /> Historic monitoring wells GLUX, GE3 and 81-03A were completed in the First,Second and Third White <br /> Sandstone aquifers, respectively, and demonstrated water elevations for the I and J Pit areas. <br /> Water levels in the I and J Pit backfill aquifers will decline due to the I and J Pit boxcut and HWM mining. <br /> These drawdowns are expected to extend outward in the First,Second and Third White sandstone <br /> aquifers for up to a mile in these relatively low permeability aquifers until water levels recover in the <br /> backfill and HWM aquifer areas. The recovery of groundwater to a higher level than baseline in the <br /> northern end of the HWM area will cause the levels in these three aquifers to eventually be higher than <br /> baseline to the north of this mining. This will limit the drawdowns to the north of the mining to several <br /> years with eventual recovery of water levels to above the baseline level. Water levels in the boxcut <br /> areas will not recover to their pre-mine levels due to the increase in transmitting ability in the HWM <br /> area. <br /> FieVlsi® 9: Ply` l0 <br /> 2-523aa Approved <br />