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Q1 = discharge of Williams Fork at the Upstream <br />Q2 = No. 5 + No. 6 mine discharge <br />Q3 = No. 1 Strip Pit discharge <br />Qt = Total flow <br />C1 = Mean dissolved solids, calcium, magnesium, or sodium concentration of the Williams Fork <br />River <br />C2 = Weighted concentration of dissolved solids, calcium, magnesium, or sodium concentration <br />Of the No. 5 and 7 North Angle discharges, which are a combination of discharges from the <br />Nos. 5 and 6 Mines. <br />C3 = Mean dissolved solids, calcium, magnesium, or sodium concentration of the No. 1 Strip Pit <br />Ct = Flow-weighted dissolved solids, calcium, magnesium, or sodium concentration downstream <br />of the mine site in the Williams Fork River <br />The calculated effect of the mine discharge and Strip Pit discharge is to increase dissolved solids concentrations <br />during aloes-flow event from 332 mg/L to 576 mg/L and to increase [he SAR from 0.44 to 5.05. The Williams Fork <br />River water would have a low to moderate sodium hazard and maintain a medium salinity hazard during low flows. <br />Since actual discharges have always been less than the maximum predicted discharges, the likelihood of there being <br />any significant impact to the Williams Fork River is minimal. Also, impacts to agriculture would be minimal because <br />the river flow over the entire irrigation season would be higher than the 7 day/10-yr low flow. <br />Permit Renewal No. 4 2.05-45 Revised 3/5/03 <br />