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Corporation, flows measured by the USGS during calendar year 1994 showed a <br />maximum daily flow of 803 cfs and a minimum daily flow of 13 cfs. Monthly minimum, <br />maximum and mean flows are plotted for each month of record in Figure 23. The flows <br />in the Williams Fork River during 1994 appear normal to slightly below normal for the <br />period of record. These flows including comparison between upgradient, WF-1, and <br />downgradient, WF-2, measured to date, do not show any stream depletion impacts from <br />mine dewatering. <br />WATER QUALITY <br />Summaries of the water quality data are presented in Tables 29 through 32. A plot of <br />upstream and downstream dissolved solids measurements for the river is presented in <br />Figure 24. The data indicates that the surface water quality does not show any <br />significant variation from expected values. The comparisons of data from the upstream <br />and downstream station on the Williams Fork River indicate that there is no detectable <br />effect of mining on river water quality. As expected, dissolved solids decrease 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 <br />C-01-044 1994 AHR Page 9 <br />