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• • iii nniiiiniii iii <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />131 3 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (3031 H66-3567 <br />FAX: U03) P72 8106 <br />September 12, 1997 <br />Richard Mills <br />Environmental Supervisor <br />Twentymile Coal Company <br />?9587 Routt Co. Rd. #27 <br />Oak Creek, CO 80467 <br />Mr. Mills: <br />The Division has completed review of the 1996 Annual Hydrology Report for Mine No. 3, <br />permit no. C-84-062, and has the following questions or comments. <br />~I~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5 Lochhead <br />Executive Director <br />Michael B. Long <br />Drcision Duecior <br />Both spoil wells missed one semi-annual sample in the 1996 water year. The sample was <br />apparently made up in November of 1996, during the first quarter of the 1997 water year. <br />The Division reminds CYCC to complete all sampling exactly as per the approved <br />perntit. DMG will expect the nomtal frequency of two samples during the 1997 water <br />year, not counting [he November 1996 sample, to account for this omission. <br />Table l depicts data as reported for Site 700, Site 900, and Site 29. <br />Date Site 700 Site 900 Total Site 29 <br />3125 3.1 44 47.1 47.1 <br />4/8 18 44 62 62.5 <br />4/15 18 38 56 56.5 <br />5/10 64 31 95 95 <br />6/4 ]0 5 15.5 15.5 <br />7/2 2.4 3.7 6.1 6.1 <br />8/5 2.3 .25 2.55 1.7 <br />8/12 1.3 .OS 1.35 1.3 <br />8/20 3.1 .4 3.5 3.1 <br />