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<br />• <br />2.05.6 Mitigation of the Impacts of Mining Operations <br />Surface Water <br />The quality of water discharged from the mine is predicted to the same as <br />that discharged from the McClane Canyon Mine which is mining in the <br />same seam approximately four miles south of the Red Cliff Mine. <br />McClane Canyon Mine's discharge monitoring reports from 2002 to 2007 <br />show Electrical Conductance (EC) values ranging from 1,798 to 2030 with <br />a average of 1918 umhos/cm, TDS values ranged from 705 to 3250 with <br />and average of 1814 mg/I and pH ranged from 7.3 to 8.7 with an average <br />of 8.1. Based on the analysis of mine discharge presented in Volume III, <br />Exhibit 3, iron concentrations ranged from <0.01 to 0.07 mg/I. Manganese <br />concentrations ranged from <0.01 to 0.057 mg/I. <br />Water discharged from the Red Cliff mine could eventually enter East Salt <br />Creek after flowing though approximately 7.6 miles of ephemeral <br />channels. East Salt Creek has an average TDS of 1,998 mg/I based on <br />measurements where the creek goes under SH-139 at ESC-1, see <br />Volume III, Exhibit 3. Iron concentrations ranged from 0.07 to 1.85. <br />Manganese concentrations ranged from <0.01 to 0.24 and pH ranged from <br />7.5 to 8.5. <br />The following table provides a comparison of the quality of East Salt Creek <br />and predicted quality of mine water: <br />Parameter East Salt Creek Mine Water <br />Flow (cfs) 0 - 834* 0 - 0.11 <br />pH (s.u.) 7.5-8.5 7.3-8.7 <br />TDS (mg/1) Average 1,988 1,814 <br />Iron (mg/1) 0.07-1.85 <0.01 - 0.07 <br />Manganese (mg/1) <0.01 - 0.24 <0.01 to 0.057 <br />*ESC-2 <br /> <br />The average TDS of the mine discharge water is lower than East Salt <br />Creek. Mine water discharge and East Salt Creek both have low iron and <br />manganese concentrations so there should not be any affect with regard <br />to those to parameters. The mine water and East Salt Creek do not have <br />any potential acid forming characteristics. Mine discharge, when it occurs, <br />will improve the quality of water in East Salt Creek with regard to salt <br />content in the unlikely event mine discharge reaches East Salt Creek. <br />Permit Application <br />2.05-107 06/08