Laserfiche WebLink
March 2001 5 <br /> Energy Fuels Coal, Inc. 2000 Annual Hydrology Report <br /> The approved surface water monitoring program effectively monitors the impacts of mining <br /> operations on the surface water system adjacent to the Southfield Mine and loadout site. <br /> Monitoring of two sites on Newlin, Magpie, and Oak Creeks will provide useful data <br /> concerning potential mining impacts. Monitoring data documented through the period of this <br /> report indicate no significant impacts to surface water as a result of mining operations. <br /> Ground Water <br /> Field and laboratory data collected from monitor wells MW-8, MW-10, MW-16, MW-23, <br /> and MW-65 are summarized as described below. All data was collected in compliance with <br /> the approved monitoring program. <br /> Water quality data for wells 10, 16, 23 and 65 are shown on Tables 5, 6, 7 and 8, <br /> respectively. Water quality samples are not obtained at MW-8 as described in the permit <br /> application. As mentioned in previous AHR's, MW-10 was mined-through. Observations <br /> during the period of this report show the well is dry and draining into the mine cavity. <br /> A review of monitoring data for each well through the period of this report indicate that <br /> water quality data are comparable to previous reporting periods. <br /> Water quality in MW-16 showed moderate increases in conductivity, calcium, TDS, chloride, <br /> magnesium, sodium, and sulfate compared to average previous values. These changes may be <br /> a result of the large fluctuations in well levels observed during the 1999 reporting period. <br /> The water quality data at MW-23 indicate consistent parameters for the reporting period as <br /> compared with previous reporting periods. <br /> At MW-65, the data water quality for the reporting period show a moderate increase in the <br /> amount of nitrogen ammonia consistent with previous reporting periods. All other parameters <br /> remained consistent with average previous values. <br /> Water quality data at the monitoring wells indicate increased values in some parameters as <br /> described above. Additional monitoring will show if any of these changes are sustained <br /> trends. Water quality in all wells remains within acceptable ranges for material damage <br /> criteria. <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; stable levels at <br /> MW-16 and MW-65. <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 />