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2015 Annual Hydrology Report Energy Fuels Coal, Inc. - Southfield Mine <br />Graphs incorporating all available data for the above parameters, plotted as parameters through <br />time, were included in materials submitted with TR -43. These graphs included all available data for <br />wells MW -16, MW -23, and MW -65. Monitoring data for well MW -NW has been collected <br />throughout the monitoring period for the Southfield Mine. No water samples have been collected <br />from the well as the well has been dry to the depth to which levels in the well can be confirmed <br />throughout the monitoring period. <br />An analysis of the data shown on these graphs for the three wells follows. Since there were <br />considerable fluctuations in the data, a moving average trend line was shown on each graph to show <br />a pattern or trend more clearly. <br />Data presented for well MW -16 indicate wide fluctuations in values over time for the indicator <br />parameters including TDS, manganese, and iron. The variations in quality data values, and similar <br />wide fluctuations in water levels, suggest that groundwater in the well is affected by surface water. <br />This well is located in close proximity and down -dip from abandoned mine workings within the <br />same monitoring horizon. These mines are believed to be flooded, and are recharged by <br />precipitation. The Southfield mine did not influence MW -16 until close to the end of operations in <br />2000, when a panel was mined between the well and the old mine works. This mining apparently <br />caused the well to go dry by 2001. Prior to 2001, TDS values are seen to vary widely, then after <br />2001 trend downward before the well went dry. When the well recharged briefly in 2003-2005, <br />TDS levels were similar to those measured when mining began in 1980. Similarly, iron and <br />manganese levels fluctuate over time, and after mining ceased in 2000, are at or below the levels <br />when mining began. For the remaining parameters included on the graphs, most show wide values <br />over time with declining values after the end of mining operations. <br />A review of the data for well M -W23 shows TDS and manganese levels increasing soon after <br />mining commenced in 1980, then remaining in a close range during and after mining operations. <br />Iron values are high at the start of mining, increase slightly between 2003 and 2010, and then have <br />remained low since 2010. Data shown for the remaining parameters show parameter values <br />generally remaining in a close range from the start of mining through the post -mining period. <br />Quality data included for MW -65 begins in 1984 when the well was established. TDS values are <br />higher during 1984 through 1986, then stay in a reasonably close range during mining and after <br />operations ceased. Similarly, some iron levels were higher during the period 1984 through 1988 <br />than the remainder of mining operations, then have declined after 2000. Manganese values <br />increased from 1984 through 1988, then remained stable during mining, and have decreased after <br />mining ceased in 2000. Data included for the remaining parameters show that concentrations have <br />remained in a reasonably close range as monitored during and after mining operations. <br />Review of all groundwater monitoring data shows that no significant adverse quality trends have <br />developed at any of the three monitoring wells. From these results EFCI asserts that there was no <br />significant decrease in coal seam groundwater quality resulting from the Southfield mining <br />operation as compared to coal seam groundwater quality prior to mining operations. <br />Page 5 <br />