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.. -. <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 impact. <br />PHC Prediction: There will be subsidence-caused dewatering of the strata overlying the <br />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 Creek and <br />Cottonwood Creek. <br />The data in the AHR indicate that there has been no impact on water levels in the alluvium of <br />these two streams. <br />One additional note should be made. It was noted that the hydrochemistry of the outfalls <br />reported in the AHR are based on "total" values, not dissolved values. Hence, even a small <br />amount of sediment within the sample makes interpretation of the water chemistry impossible, <br />since the quoted analyses include the chemistry of the sediment carried in the water. This hadn't <br />been noted last year but there was a large change in the apparent chemistry of the water from <br />Discharge O1 this year, but this is likely due to the presence of sediment in the water and not the <br />chemistry of the water itself. <br />If you have any questions, please feel free to call. <br />Jim Burnell <br />cc: Sandy Brown <br />