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from 1990 through 1993 are considerably lower and within the <br />• range observe during 1982 through 1986. Nevertheless, <br />snowmelt and ditch seepage both appear to have some influence <br />on the Strip Pit discharge, as the discharge dropped to just <br />a fev gpm from January through May with a small peak in March <br />coinciding with spring runoff. <br />WATER QUALITY <br />The summary of the water quality data for the spring is <br />presented in Tables 34 and 35. A plot of dissolved solids for <br />the fl Strip Pit is presented in Figure 29. It indicates that <br />the dissolved solids level of the discharge has increased from <br />an average of approximately 900 mg/1 in 1982 and 1983 to <br />almost 1,400 mg/1 in 1986, and then decreased to approximately <br />• 1,100 mg/1 since 1987. <br />PONDS <br />Sediment ponds discharge was limited during 1993, and the <br />associated data is located in the data listings section of the <br />report. <br />HYDROLOGIC IMPACTS <br />No significant unpredicted adverse impacts were detected <br />during 1993. The continued drawdown in the Middle Sandstone <br />unit is determined to be the most significant impact related <br />to mining operations associated with Mines 5 and 6. The <br />Probable Hydrologic Consequences section of the Permit <br /> <br /> <br />