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Water qualip~ parameters for these sites are typically vvi[hin previously established ranges with a few exceptions. <br />At site 16 (Table 24), anew minimum value was recorded for total recoverable iron, and a new maximum <br />value was recorded for dissolved aluminum. At site 1002 (Table 25), a new maximum value was recorded for <br />dissolved aluminum. At site 302 (Table 27); a new minimum value was recorded for lab pH. <br />At all sites, the typical inverse relationship between Flow and field conductivity was generally evident. The <br />TDS concentrations in the upstream station of Fish Creek (16) are generally slightly lower than those in the <br />downstream station (1002). There is also a slight downstream trend of increasing sodium and sulfate <br />concentrations while calcium; magnesium and bicarbonate concentrations remain fairly consistent. The <br />proportionally higher sodium concentrations over calcium and magnesium leads to a slight downstream <br />increase in SAR. These major ion changes are more apparent during the low-flow period. The increase in <br />TDS could be caused to some extent by evapotransporative effects, but this would not account for the major <br />ion changes. These changes are more likely attributable [o discharges of waters having higher sodium and <br />sulfate concentrations than the Fish Creek water. One source of such discharge is the spoil runoff and springs <br />associated with Mine 2. However, the very low flows associated with [he Mine 2 disturbed areas indicates <br />minimal influence from [his source. The primary source of such water is the Foidel Creek mine underground <br />mine discharge point located near Mine 2. <br />Trout Creek: Two surface flow monitoring sites on Trout Creek are utilized. Site 301 is located on Trout <br />Creek above the confluence with Middle Creek and site 69 is located on Trout Creek below the confluence. <br />Tables 28 and 29 provide summaries of the 2000 Water Year data collected at Trout Creek surface flow sites. <br />Tables 28a and 29a provide period of record statistical summaries of collected data at sites 301 and 69. Period <br />of record flow summaries for these sites are provided as Tables 28b and 29b. Figures 56 through 63 provide <br />graphical representations of water levels and selected water quality parameters recorded a[ each site. For the <br />most part, typical patterns were observed with flow magnitudes near average. Again, peak flow estimates were <br />derived from extrapolated flow curves in some instances. <br />Water quality parameters for these sites are typically within previously established ranges with a few exceptions. <br />At site 301 (Table 28), new minimum values were recorded for temperature and sulfate. New maximum <br />values were recorded for lab pH and nitrite. At site 69 (Table 29), a new minimum value was recorded for <br />temperature. New maximum values were recorded for field conductivity and nitrite. <br />Since 1987, except for a short period during 1990, the salt content of Trout Creek below Middle Creek has <br />been consistently higher than above Middle Creek. Typically, there is approximately 100 to 200 umhos/cm <br />increase in field conductivity over this reach. The downstream increase was again apparent during the 2000 <br />water year. This is probably due to the effects of Middle Creek flows that have a higher salt content than Trout <br />Creek, primarily as a result of Foidel Creek which Flows into Middle Creek just upgradien[ of the Trout Creek <br />confluence. Foidel Creek salt loads during the spring runoff are primarily due to [he impact of surface mine <br />discharges. However, the Trout Creek salt content increase has not caused material damage, nor is there any <br />increase in trace metal levels. <br />SPOIL SPRING MONITORING <br />A spoil spring monitoring program was initiated in 1986 and will be conducted annually until such time as [he <br />ntoni[oring requirement is eliminated. According to [he approved plan, the annual mine-wide survey is <br />conducted during May with springs measured for Flow and field parameters. If a spring is dischazging 35 <br />gallons per minute or greater, it is monitored throughout the remainder of the year in accordance with the <br />monitoring plan. <br />The field data for the 2000 spoil spring monitoring program is presented on Table 30. A plot of the historic <br />flow data for Pond 87 and spoil spring 114 is presented on Figure 64. No discharge from the spring was <br />CYCC2000.doc 1131101 6 <br />