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Energy Fuels Mining Company <br />Raton Creek Mine <br />Permit No. C-82-055 <br />2002 Annual Hydrology Report <br />(Reporting Period January 1, 2002 through December 31, 2002) <br />Introduction <br />This Annual Hydrology Report (AHR) presents summarized hydrologic monitoring data for the <br />Raton Creek Mine operation for the 2002 reporting period. In addition, discussion and <br />comparison of these data with previous reporting periods are incorporated within the report. <br />The AHR is prepared and submitted in accordance with CMLRD Rule 4.05.13. <br />Monitoring data compiled for the AHR include the period from 1987 through 2002, <br />representing the entire time that Energy Fuels has operated the mine. EFMC has no hydrologic... <br />_ _ _ . _.. ..data from.the previous mine.operator on file:-.Required monitoring-data collected.and,preseiited'~~-- <br />in this AHR includes: groundwater quality -and levels;. diversion flow quantity and quality, and-----~ - <br />_ .,_. _ ~~. ~ ~ _ -. s ~ J _..-- ..~._ _ -_ <br />- quatttity and gtialtty=ofdtsclfiarges=t~=streariis"°` = `~:.' "'. <br />Groundwater <br />Two groundwater-wells are monitored at the Raton` Creek Mine;'i$entified~asuthe Iuppa.WelI-~" "~~ <br />and the Refuse Well. Field and laboratory data collected from the monitor wells aze <br />" summarized=as described below. As reflected on the water-quality data tables=and water= welh=~'= = - <br />- level. figures, EFMC followedahe appmv_ed-monitoring.schedule (revised ia.2001) of_semi-__ _`__-__~_.- _ <br />- - anuual~field an`d laboratory gvatity sampling;-and quarterly water le"vel measurements. :- ~~.-~-.,T- ' <br />' "=CiirFent"atCd:historie~bafer quali#y°data=for"tlie Iitppa.Well=an3"-Itefitse Well-ate-"shown"on"' `~ ~ ~~Fti ' <br />Tables 2 and 3, respeMively. A review of monitoring data for each well through the period of~~ <br />- -- ----this-report' indicate that the-monitored"pat=ameters-are withiri a-range consistent-with previous`.---~_"_-_ _ <br />?Yttg„~?. _ _ <br />Monitoring data for the Iuppa Weil indicate-slightly fiigher Ievels of total alkalinity, sodium~_ _ ~_•-=- <br />_ and temperature for the reporting period- as compared to~ the average of 1987 through 200] Iri <br />addition, an abnormally high manganese value was recorded during the third quarter- - <br />monitoring period. This value may be a result of laboratory error or sample contamination, <br />since subsequent sampling indicated that manganese was within average limits. <br />Refuse Well monitoring data indicate slightly higher levels of total alkalinity, ortho phosphorus, <br />manganese, temperature, and sodium for the reporting period as compared to the average range <br />of previous monitoring data mentioned above. <br />The noted parameter values are close to the average historic values and are likely to be a short- <br />term trend, potentially caused by drought conditions spanning the past five years. Future <br />monitoring will substantiate the possibility of sustained trends. Water quality in both wells <br />remains within acceptable ranges for material damage criteria. <br />