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.T ._ -.. ~ .. - -.. -.~__ <br />III IIIIIIiIIIIII III <br />STATE OF Cv~viv-~~O <br />DIVISION OF MINERALS AND GEOLOGY <br />Department o! Natural Resources <br />U 13 Sherman St.. Room 215 <br />Denver, Colorado 80203 <br />Phone: (3031 866-3567 <br />FAX: (303) 832-8106 <br />October 23, 1998 <br />Mr. John Walters <br />Grand Valley Coal Company <br />P.O. BOX 70 <br />Loma, Colorado 81524 <br />RE: 1997 Annual Hydrologic Report <br />Munger Canyon Mine (C-81-020) <br />McClane Canyon Mine (C-80-004) <br />Dear Mr. Walters: <br />~,. <br />~~~~~~~ <br />DEPARTMENT OF " <br />NATURAL <br />RESOURCE <br />Roy Romer <br />Governor <br />)amen 5. Lochhead <br />Enecutiv¢ Director <br />Michael B. Long <br />Dinsion DuMOr <br />This letter is to advise you that the Division has completed review of the 1996/1997 water year <br />annual hydrologic report for the McClane Canyon and Munger Canyon Mines, and we find that <br />the data presented in the report indicate that impacts are generally in conformance with PHC <br />projections presented in the permit documents. <br />One suggestion we have for future AHRs, is that it would be helpful to have baseline water <br />quality data presented in the AHR tables for both surface water and groundwater information. <br />This could be done by simply adding another column of data, and would provide an easy way to <br />identify overall water quality trends. <br />Also, as you know, there are a couple remaining hydrology related matters (reclaimed channel <br />designs) still pending from McClane Technical Revision No. 9, for which we aze awaiting <br />responses. I would like to get the issues resolved and issue a decision on the revision as soon as <br />possible, and prior to the midterm review date (January 4, 1999). I would therefore request that <br />you submit responses and revised designs by mid-November. <br />Please let me know if you have any questions. <br />Sincere) ~~ <br />Dan T. Mathews <br />Environmental Protection Specialist <br />cc: llavid Beny <br />Mike Boulay <br />