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53. The field conductivity data shows some typical seasonal <br />variation: the water quality improves during spring runoff. Ponds <br />A, D, F, and H appear to be impacted by spoil spring inflows. The <br />discharge rates from Hare not significant during irrigation season <br />and therefore do not cause any significant impacts. <br />For the ponds affected by spoil springs, increased calcium, <br />magnesium, sulfate, dissolved solids, and SAR were observed. No <br />significant changes in parameters were observed for the ponds <br />during the 1993 water year other than for iron at site 84. This <br />appears to have been related to activities associated with the <br />adjacent underground operations. The observed Trout Creek <br />conductivity increase between sites during 1992 was not enough to <br />cause material damage, and occurred during a period of irrigation <br />withdrawals. Also, the water quality of Trout Creek was better <br />than maximum levels predicted in the past salt-loading calculations <br />performed as part of the "probably hydrologic impacts" section of <br />the mine permit application. <br />Only insignificant discharges during spring runoff were recorded <br />from Mine No. 2 Ponds in 1993. Therefore no impacts to Fish Creek <br />were observed as a result of runoff from Mine No. 2. <br />IMPACTS AND FIITORE MONITORING <br />• Increased salt loading from the Mine No. 1 discharges have been <br />observed since 1982. They appear to have leveled off starting in <br />1986. The increased salt loading was predicted as described in the <br />°probable hydrologic consequences" section of the permit renewal <br />application. Actual observed salt loading in Trout Creek during <br />the irrigation season resulting from surface mining operations is <br />less than predicted and has not caused material damage. The total <br />recoverable manganese levels in Foidel Creek are below the stream <br />standard. <br />Localized increases in dissolved solids in the Foidel Creek <br />alluvium have been observed; however, these increases are confined <br />to areas immediately adjacent to the mine and no material damage <br />has or is expected to occur. As predicted, two Wadge Overburden <br />wells have increased dissolved solids levels. This increase is <br />within predicted levels and since there are no water supply wells <br />completed in this aquifer (except by the mines) no material damage <br />has or will occur. No impacts have been observed. <br />• 10 <br />