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<br />WATER QUALITY <br />Summaries of the water quality data are presented in Tables 30 through 33. A plot of <br />upstream and downstream field electrical conductivity measurements for the river is <br />presented in Figure 27. The data indicates that the surface water quality does not show <br />any significant variation from expected values. The comparisons of data from the <br />upstream and downstream station on the Williams Fork River indicate that there is no <br />detectable effect of mining on river water quality. As expected, conductivity decreases with <br />increasing flow rate in the rivers. This is due to the effects of snow melt and high rainfall <br />diluting the water. <br />SPRINGS <br />• FLOWS <br />One spring on the mine site area is being monitored. The spring is the #1 Strip Pit <br />Discharge. The #1 Strip Pit Discharge is a NPDES monitoring point. There are a few <br />other springs and local permanent "damp spots" in the area; however, their combined flow <br />is normally less than 10 gpm and are, therefore, not significant. The measured discharges <br />for the #1 Strip Pit are presented in Figure 28. The discharge from the #1 Strip Pit <br />increased significantly in 1989. This may have been due to seepage from the ditch that <br />conveys the 7 North Angle discharge. The 7 North Angle discharge began in January of <br />1989. However, discharge rates from 1990 through 1994 are considerably lower and <br />within the range observe during 1982 through 1986. Nevertheless, snowmelt and ditch <br /> <br /> <br />