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The water levels in the wells show the typical seasonal pattern of relatively ' rapid increase and decline due to spring runoff. While the seasonal variation in water levels in the alluvial sediments is readily apparent, no impact from the mining is evident. Water Quality - The water quality data is summarized in Tables 11 and 12 for the ' Foidel Creek well 008-AV-2 and Tables 13 and 14 for the Middle Creek well. The historic dissolved solids concentrations for these two wells and well 008-AV-1 ' are plotted on Figure 11. Seasonal variation is evident in the wells. This is probably due to flushing effect of the relatively low dissolved solids surface ' water which recharges the alluvial aquifers during spring runoff. The water quality of Foidel Creek alluvial wells is probably effected by the relatively high dissolved solids of the Foidel Creek water, a mean of 1470 mg/L at Station ' 60 in 1986. While a large increase in the dissolved solids level in well 008-AV-1 was observed in 1986 there is insufficient data to determine if this is a long-term or seasonal trend. Directly downstream of Mine No. 3 the water quality of the alluvium has not been affected by the mining operation. This is ' due to the localization of the effects on the alluvial aquifer due to its relatively low permeability and to the flushing effect from the spring runoff in Middle Creek. Where the dissolved solids are elevated the sulphate, sodium and ' the SAR are elevated. The data does not indicate any significant changes in the trace metals concentrations. ' Spoils ' Two wells in the spoils are monitored. They are located in the Mine 3 spoils ' and were installed in 1985. One spoil well, 008-SP-4A has been dry since it was installed. ' Water Levels - The plot of the historic water levels in spoil well 008-SP-5A is presented on Figure 12. The water levels have a similar pattern to the alluvial ' wells: they respond rapidly to the spring runoff and then decline rapidly in the summer. 1 1 -3-