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Jennifer Sekulski-Barton <br />?. Colowyo Coal Company <br />O 5731 State Highway 13 <br />Meeker, CO 81641 <br />T: 970-824-1529 <br />10 August 2010 <br />Mr. James R. Stark <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Technical Revision - 88, West Taylor Temporary Out of Pit Spoil <br />Extension, Colowyo Coal Mine, Permit No. C-1981-019. <br />Dear Mr. Stark, <br />?•? "_ 7) <br />Enclosed please find two copies of materials provided for Technical Revision - 88. <br />This revision updates Colowyo's permit to include a change in the boundary of the <br />West Taylor Fill. Colowyo has found it necessary to extend the West Taylor Fill to <br />include temporary out of pit spoil in order to optimize haulage and operate in a more <br />efficient manner. This out of pit spoil will occur below an elevation of 7875, as <br />shown on the included figures. All related text, maps, figures and hydrologic <br />modeling have been submitted in support of this change. <br />A copy of the updated page, an application form and a list of changes has been <br />included to ease incorporation into the permit. <br />If you have any questions or require additional information, please feel free to <br />contact me at (970) 824-1529. <br />Sincerely, <br />4 <br />e nifer t l k'Barton <br />vironmental Engineer <br />Encl. 2 copies <br />Cc: file CF 1.1.2.77 <br />Colowyo Coal Company • 5731 State Highway 13 • Meeker, CO 81641 <br />T+ 1 970 824 1529 • F+ 1 970 824 1598 • http://prospect.riotinto.org/irj/portal