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IMPACTS AND FIITIIRE MONITORINd <br />No significant impacts directly attributable to the activities at <br />Mine No. 3 were observed in 1992. Spoil spring discharge was <br />negligible and, therefore, not causing any impacts. The discharges <br />from the effluent sites are small and infrequent and did not occur <br />during the irrigation season in 1991. Furthermore, water quality <br />summaries included on Tables 21 through 24 shows that the discharge <br />from these sites did not contain constituents that would have a <br />detrimental effect on the water quality in Middle Creek. <br />Consequently, these discharges do not result in any detrimental <br />impacts to Middle Creek. Increases in dissolved solids in the <br />Foidel Creek, Middle Creek and the alluvium at the confluence of <br />these two streams have been observed. These increases are the <br />result of increases in dissolved solids within Foidel Creek <br />upstream of the mine and are not related to conditions at Mine 3. <br />Furthermore, dissolved solids concentrations at these locations <br />decreased in 1991 apparently due to increased flows over the <br />drought of the previous four years. Monitoring at alluvial wells <br />AV-1 and AV-2, overburden wells 008-77-58 and 008-79-06, and spoil <br />well 008-SP-SA indicate that the increase in dissolved solids is <br />localized and no material damage has occurred. Spoil well data <br />indicates that water quality and water levels in the wells have <br />stabilized. A significant drop in the concentration of manganese <br />was observed in the 1991 water quality data from spoil well <br />008-SP-5A. If this condition persists it may represent fairly <br />rapid flushing or restoration of pre-disturbance geochemical <br />conditions in these spoils. <br />Page 9 <br />