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PHC Prediction; There will be increased TDS in alluvial groundwater from mine <br />water discharge and refuse pile leachate. An insignificant impact is projected. <br />The TDS returned to historic (pre-2002) levels this year. The level of sodium was <br />somewhat higher, but overall the prediction appears to be correct. <br />PHC Prediction: There will be no impact on the quality of the Rollins sandstone <br />groundwater. <br />According to the data in the report, there was no apparent impact. There has been an <br />increase in bicarbonate level, but the overall TDS levels have remained relatively steady. <br />PHC Prediction: There will besubsidence-caused dewatering of the strata <br />overlying the workings. <br />Since the mine has been closed, there are no more inflow data to demonstrate this. <br />PHC Prediction: There will be no impact on the alluvial groundwater of Rapid <br />Creek and Cottonwood Creek. <br />The data in the AHR indicate that there has been no impact on water levels in the <br />alluvium of these two streams. The water levels recovered somewhat from the previous <br />year's measurements, which were probably attributable to drought conditions. <br />Other Comment: <br />It's notable that the water level in well N-1, measuring mine infilling, has remained <br />steady. <br />If you have any questions, please feel free to call. <br />~~ <br />Jim Burnell <br />cc: Sandy Brown <br />