2001-04-27_REPORT - C1981014 - Laserfiche WebLink

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March 2001 2 Energy Fuels Coal, Inc. 2000 Annual Hydrology Report ANNUAL REPORT OF INFLOWS, DISCHARGES AND CONSUMPTION OF WATER WITHIN THE MINE 2000 AHR Mine Inflows The estimated amount of mine inflow into accessible areas of the Southfield Mine during the reporting period is 10.3 ac-ft. This quantity is based on the combined total of water pumped within the mine and measured at inflow and seep locations. Mine inflow and seep locations identified during the reporting period are shown on accompanying Map 1. The locations shown for this reporting period include one additional seep area as compared to the previous reporting period. The additional seep area is located in a part of the limited development mining that occurred during the year. Mine inflow and seep monitoring data are presented on Table 1, with each location keyed to Map 1. Inflow and seep locations were monitored as required during the spring and fall of the reporting period. The estimated mine inflow quantity decreased this reporting period compared to the previous reporting periods. The decrease is due to the absence of observed inflow to the 1 North/2 North area of the mine, the elimination of former inflow or seep locations due to retreat mining, and an abnormally low amount of precipitation for the year. No pooled water was visible in the active and accessible areas of 2 North during the reporting period. EFCI believes that this area of the mine may have reached equilibrium with the surrounding groundwater system such that water no longer rises in this of the mine. The 2 North section was permanently sealed in May 2000, and therefor inaccessible after that date. Review of Table 1, Mine Inflow Data Summary, indicates that mine inflow quality is generally consistent with inflow data presented in previous reporting periods. The estimated quantity for each monitoring location in the mine, shown on Table 1, are typically less than data from previous reporting periods. Water Handling Within the Mine Water handling systems in the mine capture most of the inflow near their source. Within the mine, water from each inflow and seep area is pumped to a sump at 32 X-cut, 1 st North Mains, or gravity flows to the abandoned west area of the mine. Water from the sump at 32 X-cut is automatically pumped over the adjacent ramp and into the edge of the pillared area of the West Mains where it is gradually filling the west area of the mine. Water discharged from the 32 crosscut sump totalled 3.6 ac-ft for the reporting period. No Inflow from the 1 North/ 2 North area was pumped to the 32 crosscut sump during the reporting period.