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Green River near Greendale, Utah <br />600 <br />_ _ <br />mg /L 1000 -af <br />500 <br />6, 000 <br />r <br />w <br />-� <br />rn <br />ca <br />N 400 <br />4,000 <br />c <br />o <br />V V <br />LL <br />300 <br />u <br />V V\ <br />2,000 <br />200 <br />i <br />0 <br />1940 1945 1950 1955 <br />1960 1965 1970 1975 1980 1985 1990 1995 <br />2000 <br />