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III IIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />7313 Sherman St .Room 215 <br />Denver. CO 80203 <br />303 866-3567 <br />Fn%:303 832-8106 <br />DATE: January 17, 1990 <br />T0: Berhan Keffelew <br />FROM: Bill Crick ~ <br />RE: Raton Creek, (File Flo. C-62-055), Mid-Term Review <br />of ~o~ <br />t, 9 <br />F , a(a~~%jY p <br />.I`\ 4 ~ .i :.0 <br />. ra~6/6 <br />Rov Romer <br />Goverro~ <br />F+etl R Bama. <br />Dw~sron D:reaor <br />I have examined the recent ground water monitoring reports from Raton Creek, <br />and see no measurable impacts of the mine on the local water quality or <br />quantity. The Iuppa well, completed in the Vermejo Formation and possibly the <br />uppermost part of the Trinidad Sandstone, shows nearly unchanged water levels <br />and quality since 1982. Although total dissolved solids and sulfate levels <br />exceed recommended standards, they are no higher than in previous years. <br />14.7 acre-feet of water were pumped from the Helen, Animas, and Storage mines <br />during the period from July, 1988 to June, 1989. Based on field <br />determinations of pH, conductivity, and iron, water quality has remained <br />constant. <br />No changes in the operation are necessary due to ground water impacts. <br />/ern <br />cc: Mike Savage <br />3099E <br />