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• IMPACTS AND FUTURE MONITORING <br />No significant impacts directly attributable to the activities at <br />Mine No. 3 were observed in 1993. 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 late irrigation season in 1993. Furthermore, water <br />quality summaries included on Tables 21 through 24 shows that the <br />discharge from these sites did not contain constituents that would <br />have a 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 <br />apparently the result of increases in dissolved solids within <br />Foidel Creek upstream of the mine, and are not related to <br />conditions at Mine 3. Monitoring at alluvial wells AV-1 and AV-2, <br />overburden wells 008-77-58 and 008-79-06, and spoil wells 008-SP-5A <br />and 008-SP-4B 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 and 1993 water quality data from spoil <br />well 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 />~ ~1 <br />U <br />Page l0 <br />