Laserfiche WebLink
• Energy Fuels Coal, Inc <br />Southfield Mine <br />ANNUAL REPORT OF INFLOWS, DISCHARGES AND CONSUMPTION OF WATER <br />WITHIN THE MINE <br />1993 AHR <br />1. MINE INFLOWS <br />Mine inflow quantity for the Southfield Mine during the 1993 AHR reporting period is <br />estimated at 43.6 AC-FT. This figure is based on the combined total of water discharged <br />from the North Entry Well, shown on Table I. Significant inflows into the west sections of <br />the mine, presumably still occumng, are inaccessible behind seals constructed prior to the <br />reporting period. <br />Mine inflow and seep locations were monitored during the reporting period on an <br />opportunistic basis. Inflow locations, where accessible, were monitored for flow and quality <br />data. All mine inflow and seep monitoring data is presented on Table 2; each location keyed <br />to a current mine map attached as Map 1. The locations shown on the map are consistent with <br />those documented on previous AHR's. Because Southfield is retreat mining most areas, <br />inflows and seeps monitored during the reporting period may become inaccessible later during <br />the same period. This situation has occurred at the locations shown as nos. 1, 7, 8, and 9 on <br />Map 1, Mine Inflow Locations. <br />Mine inflow and seep quality, presented on Table 2, indicates that mine inflow quality <br />is consistent with inflow data presented in previous reporting periods for those areas <br />persisting for several years. Estimated total mine inflow, 43.6 AC-FT, are 70 percent greater <br />than the previous reporting period (North Well discharge only). The increase is primarily <br />attributed to increased inflow quantity in the 2 North mining area. Inflows monitored in 2 <br />Notth during the reporting period indicate and average inflow for the entire 2 North area <br />averages approximately 20 gallons per minute. <br />2. DISCHARGES TO STREAMS " <br />Water discharged to the stream system totalled 47.8 AC-FT during the period of this <br />report (refer to Table 3). All water discharged is treated and managed by Southfield's surface <br />water handling system depicted on Figure 2. Discharge events are sampled and reported in <br />accordance with the approved wastewater discharge permit. <br />Water quality data for discharges to streams are summarized on Table 3. A review of these <br />data indicate that discharges were within NPDES permit limitations, including the samples <br />submitted for Acute WET testing. Only one discharge event from Pond No. 5, on 5/12/94 <br />exceeded discharge limitations for total suspended solids and total iron. The probable cause of <br />• <br />