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III I II I II I II IIII III • • ` ~ ` ``- ``~ ~ ~~ <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Dtpanmem of Natural Rtsources <br />1713 Sherman 51.. Room ?75 <br />nrn.-er, Colorado 90?03 <br />Phone: 13U7i 966 756i <br />FAS: 13071 932-9106 <br />January 17, 2001 <br />D I VISION O F <br />MINERALS <br />GEOLOGY <br />RECLAMATION <br />MINING•SA FETY <br /> 8iil Owens <br /> Govamo~ <br />Ron Thompson ereg E. ~-VZlcntr <br />Property Manager E.ecmi~e Director <br />Basin Resources, InC. Michael 8. long <br />14300 Highway 12 D ~i,~on D~rer~°. <br />Weston, CO 81091 <br />RE: 1999 Annual Hydrology Report, Golden Eagle Mine, #C-81-013 ~ <br />Dear Mr. Thompson: <br />The Division has completed review of the 1999 Annual Hydrology Report (AHR) for the Golden <br />Eagle Mine. <br />Monitoring Frequency <br />All samples and site visits were conducted as required. One general observation was noted <br />regarding reference to permit maps. The AHR text references Map 8 of the permit document. <br />Map 8 is a soils map. The hydrology maps are Maps 7A and 7B of the permit. Please correct <br />this reference in future reporting. <br />Surface Water quantity and Quality <br />Two stations on the Purgatoire River are monitored for flow and field parameters on a quarterly <br />basis, and a lab sample is analyzed on an annual basis. PRS-2 is located upstream of all <br />Golden Eagle mining activities and PRS-3 is located downstream of all mining activities. One <br />water sample was acquired at each of these locations, in accordance with the annual sample list <br />on page 2.05-47d, Table 23 of the permit. One error was noted in the 1999 data for these <br />stations. The conductivity value for November is improperly entered in millimhos/cm <br />(mmhos/cm) rather than micromhos/cm (umhos/cm). For the water year, flow is slightly lower <br />(3.5%) at the downstream site and salinity is slightly higher, with total dissolved solids (TDS) <br />values recorded of 190 mg/I and 200 mg/I from upstream to downstream. Overall water quality <br />is acceptable according to the standards for all uses. <br />Sediment ponds 3 and 4 were removed in January 1999 and point source discharge no longer <br />occurs at this site. <br />Ground Water Quantity and Duality <br />Data collected during 1999 supports last year's observation that overburden ground water levels <br />are recovering. All overburden bedrock water levels continue to recover. <br />