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• water year. FBR-2 (Figure 23) e~ibited a slight decline in water level during 2001. 97013TH (Figwe 27) exhibited a rise in water level during 2001. The lower water levels typical in well 91M005 relative to historical values for we11006-82-48A continued. We1191M005 was established in 1993 to replace we11006-82-48A, which was mined through during 1993. Field measwements aze presented in Tables 8 and 9 for wells 006-BRDH-7 and 91M005. Field parameter measwements on these Twentymile Sandstone wells monitored during 2001 exhibited values within anticipated ranges, with no mine related impacts evident. Field measwements and water quality parameters for wells FBR- 11-B, FBR-2, 97012TH, and 97013TH are provided on Tables 10 through 13. At well FBR-11-B (Table 10), new maximum values were recorded for temperature, dissolved calcium, dissolved magnesium, and dissolved sodium. At well FBR-2 (Table 11), new minimum values were recorded for field pH, dissolved magnesium, dissolved sodium, and total dissolved solids. Well 97012TH (Table 12) and 97013TH (Table 13) established some new maximum and minimum values for tested parameters in 2001, but appeazed very consistent with values observed in 2000. Note that these two wells were recently installed, and only a limited number of values have been collected to date, however, none of these values fell outside the typical historical range of other wells in this aquifer. Trout Creek Sandstone: Duriug 2001, six Trout Creek Sandstone wells, 001-83-106, 001-83-107, 95M001, FBR-2-E, 97012TC and 97013TC, required monitoring for water levels and field parameters on asemi-annual basis, and one well, 008-75-EFC, required an annual water level measurement Wells 001-83-106, 95M001, • FBR-2-E, 97012TC and 97013TC, also requved water quality sampling on asemi-annual basis. All monitoring requirements were completed at these sites during 2001. Note that well FCM#2 was replaced in the fall of 1995 by monitoring we1195H001, with semi-annual monitoring during 2001 occurring at we1195M001 in lieu of FCM #2. Tables 14 through 20 provide summaries of the 2001 Water Year data collected at each site. Table 14a provides the period of record statistical sttmmary of collected data at well 001-83-106 with Tables 17a through 20a providing the period of record statistical summaries of collected data at wells 95M001, FBR-2-E, 97012TC and 97013TC. Figwes 29 through 39 provide graphical representations of water levels and selected water quality parameters recorded at each site. The continuous pumping of well 001-83-106 (Figwe 29) complicates the potentiometric surface in the Trout Creek Sandstone. The potentiometric surface trends prevalent in the Twenlymile Sandstone and Wadge Overbwden aquifers are not evident in the monitored Trout Creek wells. The previously monitored well 006-83- 48C routinely exhibited water levels in the 7100 ft elevation range while replacement well FCM#2 exhibited levels azound the 6520 ft elevation during 1995. In the fall of 1995, well 95M001 was established in part to address the apparent discrepancy in water levels between wells 006-83-48C and FCM#2. Water levels from well 95M001 confirm that levels recorded from well FCM #2 were accurate (Figure 31). Water levels in well 95M001 continue to decline since the 1999 water yeaz. Significant inflows from the Trout Creek Sandstone into the mine workings have not been encountered to date to account for the apparent lowering of the potentiometric surface in the Trout Creek formation as indicated by the water level data previously recorded for well 006-83- • 48C. Some dewatering of the aquifer does ocew from the pumping of well 001-83-106 to supply the mine with domestic water. Thuing 2001, the southernmost Trout Creek well, 001-83-107 (Figwe 30), continued to exhibited lower water levels in the 6835 ft elevation range, while the northernmost well, 008-75-EFC (Figwe 32), 5