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June 2000 6 <br />Energy Fuels Coal, Imo. 1999 Annual Hydrology Report <br />Well levels for all monitoring wells are summarized on Table 4, and water level data are <br />presented graphically for the five monitor wells on Figures 3, 4, 5, 6, and 7. <br />A review of water levels data shows steadily declining water levels at MW -23; seasonally <br />fluctuating levels at MW -16; and stable levels at MW-65. Water levels at MW -16 reached a <br />record high during the second quarter, probably due to the previously described precipitation <br />events during that quarter. <br />Well MW -8 was mined- through in 1993 and immediately went dry. Subsequent monitoring <br />showed that the borehole had collapsed to a point 336 feet below the surface. The water level <br />recovered and gradually increased from the 280 foot level after early 1996. The sustained <br />recharge of the well may indicate that sub - surface conditions stabilized. In the final quarter of <br />the monitoring period, however, the well casing collapsed at approximately 250 feet from <br />ground level, malting the water level measurement impossible. <br />The approved ground water monitoring program adequately monitors potential impacts of <br />mining on the ground water system. The data collected through the period of this report <br />indicate that no significant ground water impacts have occurred as a result of mining. <br />