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Energy Fuels Mining Company Raton Creek Mine Permit No. C-82-055 2004 Annual Hydrology Repoli (Reporting Period January 1, 2004 through December 31, 2004) Introduction This Annual Hydrology Report (AHR) presents summarized hydrologic monitoring data for the Raton Creek Mine operation-reclamation for the 2004 reporting period. In addition, discussion and comparison of these data with previous reporting periods aze incorporated within the report. The AHR is prepazed and submitted in accordance with CMLRD Rule 4.05.13. Monitoring data compiled for the AHR include the period from 1987 through 2004, representing the entire time that Energy Fuels has operated/reclaimed the mine. EFMC has no hydrologic data from the previous mine operator on file. Required monitoring data collected and presented in this AHR includes: groundwater quality and levels; diversion flow quantity and quality; and quantity and quality of discharges to streams. Groundwater Two (2) groundwater wells aze monitored at the Raton Creek Mine, identified as the Iuppa Well and the Refuse Well. Field and laboratory data collected from the monitor wells aze summarized as described below. As reflected on the water quality data tables and water well level figures, EFMC followed the approved monitoring schedule (revised in 2001) of semi-annual field and laboratory quality sampling, and quarterly water level measurements. Current and historic water quality data for the Iuppa Well and Refuse Well are shown on Tables 2 and 3, respectively. A review of monitoring data for each well through the period of this report indicate that the monitored parameters aze within a range consistent with previous monitoring data. Monitoring data for the Iuppa Well indicate slightly higher levels of total alkalinity for the reporting period as compazed to the average of 1987 through 2002 whereas hardness has decreased. Sulfate ranged higher during the latter 1990's era but has decreased again during the later reporting periods to a range that is more akin to that of the report's beginning years (late 1980's). Refuse Well monitoring data indicate slightly higher levels of total alkalinity, temperature and sodium for the reporting period as compared to the average range of previous monitoring data as stated above. Manganese however, has decreased during the current reporting period. The Division, in response to the 2002 AHR, requested calibrating the monitoring instrument used for conductivity. Inhouse calibration to the meter showed little effect. During 2004, EFCI used a different meter for monitoring the conductivity. With reference to the Iuppa Well,