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Energy Fuels Coal, Inc. Southfield Mine - 2004 Annual Hydrology Report April 5, 2005 accumulate, initially in the lowest portions of the mine-out workings and gradually rising into other mined-out areas until a dynamic equilibrium is reached between mine water inflows and discharge to ground water systems. During the reporting period, consumptive water use was limited to minor pond evaporation. Use of the Corley Well as a water source was discontinued in late January 2001. Due to drought conditions over the past few years, the only ponds that have held any significant quantities of water were Mine Ponds 4 and 5. These ponds have partially filled during the spring and held water for 2 to 3 months before drying out. Although there was more precipitation during 2004, there were few large storm events. Therefore, the water levels in Ponds 4 and 5 were considered insignificant. Pond evaporation was estimated at 0.25 acre-feet for 2003. This estimate is assumed for 2004 and is considered a conservatively high estimate. The source of water for any minor consumptive uses typically is trucked to the site from Florence or Rockvale. No water was trucked to the site during 2004 and it is anticipated that future consumptive water use will be limited to pond evaporation from the remaining sedimentation ponds (Ponds 4, 5, Ll, and L2). Total consumptive use for 2004 is estimated at 0.25 acre-feet, as indicated on Table 2, Water Balance and Consumptive Use Summary. The water balance compares water source withdrawals (consumptive use) with dischazge quantities. Withdrawals previously included any excess mine water pumped from the mine as well as water withdrawn from wells. No water was pumped from the mine or withdrawn from on-site wells during 2004. Consumptive use during the reporting period was limited to only pond evaporation. No pond water was discharged to area streams in 2004. Given that there were no mine water discharges during 2004, water quality data from the most recent discharges (in 2001) are provided in Table 3, NPDES Discharge Summary. Historically, all discharges were within NPDES permit limitations. All samples submitted for WET testing from Outfall 004 were also in compliance. Note that Ponds 1 and 3 have been reclaimed. TABLE 2 WATER BALANCE AND CONSUMPTIVE USE SUMMARY 2004 2004 1st Qtr . 2nd Qtr. 3rd Qtr. 4th Qtr. Total Quantity CONSUMPTIVE USE (ACRE-FT): 1. Corley Well (Pumped) 0.00 0.00 0.00 0.00 ~ 0.00 2. Domestic Use (Trucked from Florence/Rockvale) 0.00 0.00 0.00 0.00 0.00 3. Dust Control/Washdown (Trucked from Florence/Rockvale) 0.00 0.00 0.00 0.00 0.00 4. Pond Evaporation (Estimated) 0.00 0.00 0.249 0.00 0.249 Total Input Water to Mine 0.249 ac-ft DISCHARGES TO STREAMS (ACRE-FTI: 1. Sediment Pond Discharges 0.000 0.000 0.000 0.000 0.000 2. Bypass (NPDES 005) 0.000 0.000 0.000 0.000 0.000 Total Output Water from Mine 0.000 Note: Domestic Use estimated at 10 percent of total amount trucked. son/2004 annualhydrptdoc NWCC INC. Pages