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relatively rapid increases and declines associated with spring runoff. The longer-term trends in water levels at <br />these sites generally parallel the fluctuations observed in annual stream flows. <br />Field conductivity measurements in general at well 001-5-5 were noted to be slightly lower than the up gradient <br />site, 009-S-10. There appears to be a general increasing field conductivity trend for well 001-5-5 through 2010 <br />(Figure 32). Conductivity values dropped in 2014 and 2015, but are still within historic levels. Down gradient, <br />field conductivities at well 008 -AV -2 ranged between 1480 and 1830 for 2015. Field conductivity measurements <br />at wells 008 -AV -1 and 008 -AV -2 are comparable and occurred within previously established ranges for these <br />sites. <br />Fish Creek Alluvial Groundwater: Monitored water quality parameters exhibited values at the Fish Creek <br />alluvial wells which were typically within previously established ranges. There are four older Fish Creek alluvial <br />wells (006 -AY -1, 006-A7--3, 008 -AU -3 and 008 -AW -3). Tables 23 through 26 provide summaries of the 2015 <br />Water Year data collected at each site. Tables 23a through 26a provide POR statistical summaries of collected <br />data at each site. Figures 34 through 37 provide graphical representations of water levels and selected water <br />quality parameters recorded at each site. <br />In addition to the four wells discussed above, three additional alluvial wells, AVF-13 and AVF-14 (installed in <br />August 2001), and AVF-15 (installed June 2002) were added per PR99-05, 4e-7. Monitoring frequencies for <br />these wells are different than that for the four older wells above (see Table 18). <br />Water levels at well 006 -AY -1, located on Fish Creek upstream of the Southwest Mining District and Mine 2, <br />had exhibited a relatively steady increase in water level from approximately 1990 through 1994 (see Figure 34). <br />From 1994 through 1997, that trend has reversed and is generally decreasing from 1994 through 2000, and <br />appears to have subsequently stabilized. POR conductivity data has been relatively consistent the last several <br />years (Figure 35). Well 006 -AZ -3 is situated downstream of 006 -AY -1 and below the Fish Creek Borehole. <br />Well 006 -AZ -3 is monitored in conjunction with surface water site 307. Several water years are presented to <br />show relative seasonal fluctuations (Figure 36). POR conductivity data has exhibited a general increase since the <br />late 1980's, but appears to have stabilized since 2000 (Figure 37). <br />Downstream of 006 -AZ -3 are relatively new alluvial wells, AVF-13, AVF-14, and AVF-15. Data for sites AVF- <br />13, AVF-14, and AVF-15 are provided in Tables 29, 30, and 31, respectively. Figures 38 through 43 provide <br />graphical representations of water levels and selected water quality parameters recorded at each new site. Note <br />that localized mining subsidence along Fish Creek occurred in the area of well AVF-15 during the summer of <br />2004. The general location area of AVF-15 has subsequently been permanent ponded. Note that per our <br />subsidence plan, alluvial 008-AU3 replaced AVF-15 as the downstream monitoring well for subsidence <br />evaluation in 2006. Note that Well AVF-15 was replaced in 2014, and is located in the same general vicinity. <br />Well 008 -AU -3 and surface water site 305 monitor water levels upstream from the Fish Creek Tipple area with <br />data presented on Figure 44. The furthest downgradient Fish Creek alluvial monitoring well is 008 -AW -3 (Figure <br />46) located near the Fish Creek Tipple. No unusual water level fluctuations were noted at any of these sites <br />during 2015. Similarly, conductivity values for these two sites were within historical ranges. <br />9 <br />