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<br />TWENTYMILE COAL COMPANY, POND E, FISH CREEK TIPPLE <br />IRON <br /> <br />c <br />z <br />m <br />198 0 1981 1982 1983 1984 1985 1986 1987 <br />Legend <br />o TOTAL <br />• TOTAL REC. <br />MEAN STANDARD <br />MAXIMUM STANDARD <br />