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at these two sites. Wells 008-AV-1 and 008-AV ~ are monitored in conjunction with surface water site 304 at a point on Foidel Creek approximately 1000 feet upstream of the confluence of Foidel and Middle Creeks. Water levels in these wells and the stream show the q~pical seasonal interrelationship of relatively rapid increases and declines associated with spring runoff (Figure 16). The longer term trends in water levels at these sites generally parallel the fluctuations observed in annual streamflows. Field conductivity measurements in general at well 001-5-5 (Figure 13) averaged 2300 in 2000, and were again noted [o be higher than the upgradient site 009-5-10 (Figure IS) which averaged -1300. Moving downgradient, field conductivities at well 008-AV-2 (Figure 17) are averaging -1800. Field conductivity measurements at wells 009-5-10 and 008-AV-2 appear to have stabilized within previously established ranges for these sites. Conductivity values at well 001-5-5 continued a general increasing trend in 2000. CYCC will continue [o monitor the direction of this trend. No anomalous water quality impacts attributable to mining were evident in data collected from Foidel Creek alluvial wells during 2000. Water quality parameters for these sites are typically within previously established ranges with a few exceptions. At well 009-5-10 (Table 9), new maximum values were recorded for field conductivity and nitrite. At Well 001-S-5 (Table 8), new maximum values were recorded for field conductivity and nitrite. At Well 008-AV-2 (Table 10), a new minimum value was recorded for sulfate and a mew maximum value was recorded for nitrite. Fish Creek Alluvial Groundwater: During 2000, three Fish Creek alluvial wells (006-AY-l, 006-AZ-3, and 006-AW-2) required monitoring for water levels and field parameters on a monthly basis, and water quality sampling on a quarterly basis. Tables 11 through 13 provide summaries of [he 2000 Water Year data collected at each site. Tables 1 1 a through 13a provide period of record statistical summaries of collected data a[ each site. Figures 18 through 23 provide graphical representations of water levels and selected water quality • parameters recorded at each site. Water levels during 2000 remained generally consistent with established ranges and patterns and showed the typical seasonal variability of elevated water levels in the spring. Well 006-AY-I (Figure 18) is located on Fish Creek upstream of Mine 2. Well 006-AZ-3 (Figure 20) is situated downstream of 006-AY-1, and below the Fish Creek Borehole mine dewa[ering facility. Well 006-AZ-3 is monitored in conjunction with surface water site 307. Further downstream, well 006-A W-2 (Figure 22) is monitored in conjunction with surface water site 1002. Again in 2000, the interrelationship between alluvial groundwater and surface water is evident on these plots. No unusual water level fluctuations were noted at any of these sites during 2000. No anomalous water quality impacts attributable to mining were evident in data collected from Fish Creek alluvial wells during 2000. Water quality parameters for these sites are typically within previously established ranges with a few exceptions. At well 006-AY-I (Table 11), new minimum values were recorded for lab pH, TDS, and dissolved manganese. A[ 006-AZ-3 (Table 12), new minimum values were recorded for lab pH and dissolved manganese. New maximum values were recorded for lab conductivity, dissolved calcium, dissolved magnesium, bicarbonate, and dissolved selenium. At 006-AW-2 (Table 13), a new minimum value was recorded for dissolved calcium. New maximum values were recorded for total ammonia. Field conductivities and TDS values are observed in general to increase in the downstream direction along Fish Creek. The highest values are noted to occur in association with well 006-A W-2. Elevated ammonia readings first detected in August of 1995 continue to be observed. SPOILS Five wells (001-SP-6, 001-SP-7, 026-SP-l, 026-SP-2, and 026-SP-3) are monitored in the spoils on a quanerly basis for water levels and field parameters. They are located at Mine 1 and Eckman Park and were installed in 1985 and 1986. Three of these wells (026-SP-I, 026-SP-2, and 026-SP-3) require semi-annual water quality sampling as well. All sampling requirements were completed at these wells during 2000. CYCC2000.doc 1131/01 3