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conL <br />• FLOWB <br />Plots of the measured discharges for the two f5 Mine discharge <br />points are presented in Figures 19 and 20. The flows are <br />measured at the discharges by totalizing flow meters on the <br />dewatering sump pumps. The mean flow rate did not exceed the I <br />mine inflow predictions from the Probable Hydrologic <br />Consequences (PHC) evaluation. The 1993 average discharge was <br />260 gpm from the }`5 Mine sump, and 178 gpm from the 7 North <br />Angle. The combined average discharge was 438 gpm. The water <br />produced in the {`6 Mine is pumped underground to the ~5 Mine <br />sump and is accounted for at the discharge from that point. <br />The low discharge from the 7 North Angle Sump during the first <br />half of the year was due to the shutdown of the pump. The <br />• discharge from the sump generally ranges from 250 to 450 gpm <br />when the pump is working year-round. The decrease in the ~5 <br />mine sump discharge is due to a pump failure in the last <br />quarter of 1993. <br />WATER QUALITY <br />Summaries of the water quality data for the mine discharge are <br />presented in Tables 19 through 22. The #5 Mine sump discharge <br />is NPDEs discharge point 8003. The 7 North Angle Discharge is <br />NPDES discharge point #024. The }`5 Mine discharge water <br />quality indicates a slight increase in dissolved solids <br />concentrations over time. The plot of dissolved solids <br />presented in Figure 21 shows that the average dissolved solids <br />• <br />6 <br />