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/ /- Kennecott Colowyo Coal Mine <br />5731 State Highway 13 <br />~ ~ Energy Meeker, Colorado 81641 <br />Telephone: 1970) 824-1579 <br />Fax'. (970) 824-1598 <br />Tay Tonoal <br />Sr. Environmental Engineer <br />R~~~hYr~ <br />February 24, 2006 <br />E E 6 2 7 2006 <br />Mr. Jim Stark <br />Division of klinerals a Geoio9Y <br />Environmental Protection Specialist <br />Colorado Division of Minerals & Geology <br />1313 Sherman Street -Room 215 <br />Denver, Colorado 80203 <br />RE: Technical Revision No. 63, Revision to Postmining Topography Colowyo Coal Mine, <br />Permit No. C-81-019. <br />Deaz Mr. Stark, <br />Enclosed please find three copies each of the showing the postmining topography associated with <br />TR-63. As we have discussed, the only change made is as a result of the deletion of a single <br />contour line at the top of the West Pit Spoil fill to more closely match the approved postmine <br />topography. <br />Also included is a tracking sheet listing these maps. <br />If you have any questions or just require additional information, please don't hesitate in <br />contacting me at the phone number above. <br />Sincerely, <br />Tay Tonozzi <br />/C~ <br />Senior Environmental Engineer <br />Encl. 3 copies <br />Ca file CF 1.1.2.52 2006 w\enc] <br />Public Permit w\encl <br />Antelope Mine • Colowyo Mine • Gordero Rojo Mine • Jacobs Ranch Mine • Spring Creek Mine <br />A m=tuber of the Rio Tinto Group <br />