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. localized mining subsidence along Fish Creek occurred in [he area of well AVF-14 during 2003. Wells AVF-13, <br />AVF-14, and AVF-15 indicated a significant increase in dissolved iron concentrations. Higher concentrations of <br />iron at AVF-14 and AVF-15 [tray be related in part to subsidence ponding in the area of AVF-14 (See upcoming <br />discussion of related surface sites SW -13 through SW-15). Due to the limited period in which these wells have <br />been established, the data base will need to be expanded before these new maximum values can be evaluated. <br />TCC will continue to monitor this anomaly. <br />We11008-AU-3 and surface water site 305 monitor water levels upstream from the Fish Creek Tipple area with <br />data presented on Figure 48. The furthest downgradient Fish Creek alluvial monitoring well is 008-AW-3 (Figure <br />50) located near the Fish Creek Tipple. No unusual water level fluctuations were noted at any of these sites <br />during 2003. Similarly, 2003 conductivity values for these two sites were within historical ranges (Figures 49 <br />and 51, respectively). <br />No new minimum or maximum values were recorded at well 006-AY-1 (Table 27) in 2003. At well 006-AZ-3 <br />(Table 28), a new maximum value was recorded for dissolved manganese. Well 006-AW-2 (Table 29) was <br />deactivated and subsequently abandoned in 2003. At well 008-AU-3 (Table 30) a new minimum value was <br />recorded for lab conductivity. At well 008-AW-3 (Table 31) no new minimum or maximum values were <br />recorded. Other monitored water quality parameters returned values at the Fish Creek alluvial wells typically <br />within previously established ranges. <br />• Trout Creek Alluvial Groundwater: During 2003, one Trout Creek alluvial monitoring well (008-AT-1) <br />required monitoring for water levels and field parameters on a monthly basis, and water quality sampling on a <br />quarterly basis. Per TR03-42, field monitoring requirements at this site were reduced to a quarterly basis, and <br />water quality sampling to semi-annual. One additional well (Jones well) required monitoring far water levels and <br />field parameters on a quarterly basis, and water quality sampling for full suite parameters on an annual basis and <br />sulfate on a quarterly basis. All monitoring requirements were met at these sites. All monitoring requirements <br />were met at this site. Table 35 provides a summary of [he 2003 Water Year data collected. Figures 52 through <br />55 provide graphical representations of water level and field conductivity information to date. Table 32 provides <br />the 2002 data for this well. <br />Well 008-AT-I is monitored in conjunction with surface water site 1005. Figure 52 depicts the water level <br />relationship between these two sites. Additionally, at well 008-AT-I (Table 32) no new minimum or maximum <br />values were recorded. At the Jones well (Table 33) new maximum values were recorded for dissolved <br />magnesium, and sulfate. Monitoring was initiated on Trout Creek Alluvial wells back in 1994. <br />Middle Creek Alluvial Groundwater: Two Middle Creek alluvial wells (AVM-1 and AVM-2) were <br />inwrporated into the monitoring network during 1996. Both had required monthly monitoring of water levels <br />and field parameters with quarterly water quality sampling. However, per TR03-42, these wells were abandoned <br />in the Fall of 2003. Tables 34 and 35 provide 2003 Water Year data collected at each site. Tables 34A and 35A <br />provide period of record statistical summaries of collected data at each site. Figures 70 through 73 provide <br />graphical representations of water levels and selected water quality parameters recorded at each site. <br />10 <br />