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<br />The data in the AHR indicate that there has been no impact on water levels in the alluvium <br />of these two streams. <br />2002 AHR <br />The Division has completed review of the 2002 Annual Hydrology Report from the Roadside <br />Mine. This review has been organized by comparing the results presented in the report to <br />the probable hydrologic consequences (PHC) section of the permit. <br />Surface Water <br />PHC Prediction: Effects of minewater consumption and discharge on the quantity of flow in <br />the Colorado River will be negligible. <br />The AHR data support this prediction. <br />PHC Prediction: The effects of subsidence on flaws in Rapid Creek and Cottonwood Creek <br />will be negligible. <br />The AHR data support this prediction. There has been no detectable effect. <br />PHC Prediction: Discharges will increase the salinity of the Colorado River by 0.1 to 0.2°,f,. <br />The calculations in the AHR support this prediction. In the year 2002 report, the date <br />chosen for the "snapshot" was January 10, during a relatively low-flow period. At that <br />time, the calculated salinity increase was 0.05°~, which is lower than the prediction. The <br />data for the full year show that the dissolved salts and volumes of discharge were within <br />the ranges seen in previous years. <br />PHC Prediction: There will be increased sedimentation due to the surface disturbance. <br />None of the data refute this prediction, but there is nothing to directly support it. <br />PHC Prediction: There will be increased TDS in alluvial groundwater from mine water <br />discharge and refuse pile leachata. An insignificant impact is projected. <br />There was a considerably higher TDS content in the UTL-2 alluvial well this year. See <br />request below. <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. <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 />