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4"' <br />x-~ <br /> .. 1. a .. .. .I n• <br /> J I II II III III I IIII ' ll <br /> • <br />. <br /> 999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department o~ Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (3031 866-3567 <br />FAX: (3031 83'?-8106 <br />November 10, 1997 <br />Mr. John Walters <br />Grand Valley Coal Company <br />P.O. BOX 70 <br />Loma, Colorado 81524 <br />RE: McClane Canyon Mine, Permit C-80-004 <br />MR-24 (Concrete-Portal Structures) <br />Deaz Mr. Walters: <br />~~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Goverrar <br />lames 5. L«hhead <br />Eaecuove Oiredor <br />Michael B. Long <br />Division Dir¢aor <br />We have reviewed the above referenced minor revision application, received November 6, 1997. <br />The only concern we have identified is that the reclamation cost estimate will need to be <br />amended to reflect the changes associated with the proposed revision, including demolition of the <br />proposed concrete portal structures. It would appeaz that additional costs associated with <br />structural demolition may possibly be offset by reduced backfilling costs owing to the interim <br />backfilling proposed, but appropriate cost updates and supporting information will be necessary. <br />Please contact me if you have any questions. <br />Sinc r y, <br />Dan T. Mathelvs <br />Environmental Protection Specialist <br />cc: Larry Routten <br />