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• Table 7-53 (Continued) <br />Tabulation of Mean Monthly Flow, TDS and Salt Load at Surface Water <br />Monitoring Site NPDES 003 (DA0003) <br />From January 1981 through September 1986, <br />Seneca II Mine, Routt County, Colorado <br />Mean Mean <br />Month Year Flow(cfs)1 x TDS(rng/1)2 = (Flow)(TDS)3 <br />November 1981 No Flow 0.00 <br />1982 0.025 1490 37.25 <br />1983 0.028 1710 47.88 <br />1984 0.353 2415 852.50 <br />1985 0.431 2756 1187.84 <br />1986 <br />December 1981 No Flow 0.00 <br />1982 0.015 1331 19.97 <br />1983 0.012 1557 18.68 <br />1984 0.727 'L645 1922.92 <br />1985 0.492 2198 1081.42 <br />1986 <br />• 1Mean monthly flow determined from continuous flow record except for 1981, <br />January through April 1982 and 1986 which was estimated from weekly <br />instantaneous flow measurements. <br />2Mean monthly total dissolved solids concentration determined from weekly <br />or monthly measurements. <br />3Flow(cfs) x TDS(mg/1) x 0.9847 = tons/year. <br /> <br />7-184 Revised 10/01/86 <br />