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Table 7-62 (Continued) • <br />Comparison of Mean Monthly Upstream (Site 26) and <br />Downstream (Site 27) Water Quality on Fish Creek <br />From July 1979 through March 1986, <br />Routt County, Colorado <br />(Summarized From: Twenty Mile Coal Company Permit <br />Application and Annual Reports, MLRD Library) <br />Mean TDS(mg/1) <br /> % Change (±) in TDS From <br />Month Year Site 26 Site 27 Site 26 to Site 27 <br />September 1979 720 420 -42 <br /> 1980 618 562 -9 <br /> 1981 524 592 +31 <br /> 1982 426 450 +6 <br /> 1983 530 570 +8 <br /> 1984 770 800 +4 <br /> 1985 608 592 -3 <br /> 1986 <br />October 1979 685 650 -5 <br /> 1980 516 552 +7 <br /> 1981 360 364 +1 <br /> 1982 420 460 +10 • <br /> 1983 540 600 +11 <br /> 1984 630 600 -5 <br /> 1985 524 518 -1 <br /> 1986 <br />November 1979 445 450 +1 <br /> 1980 496 496 0 <br /> 1981 330 340 +3 <br /> 1982 524 672 +28 <br /> 1983 655 980 +50 <br /> 1984 800 805 +1 <br /> <br />1985 <br />694 <br />754 _ <br />+9 <br /> 1986 <br />December 1979 405 <br /> 1980 304 516 +70 <br /> 1981 350 400 +14 <br /> 1982 524 528 +1 <br /> 1983 <br /> 1984 530 780 +47 <br /> 1985 652 963 +48 <br /> 1986 <br />• <br />Revised 10/01/86 <br />7-221 ~ <br />