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a? <br />O?j <br />O <br />r?F <br />0 <br />Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />April 25, 2011 <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 />??R `L S 2011 <br />;.,,;clacn?tion' <br />t1'?inin9 an <br />RE: Colowyo Mine's response to the Division's Second Adequacy Report for Technical <br />Revision - 81. <br />Dear Mr. Stark, <br />Colowyo received the Division's adequacy comments for TR-81 on February 25, 2011. Adequacy <br />comments and responses that have that have been previously accepted by the Division have not <br />been included in this response letter. Colowyo has the following responses to the Divisions <br />comments: <br />Rule 3.02.2 - Determination of Bond Amount <br />9. The Division now believes that the TR-81 plan for the South Taylor Pit is a viable mining <br />and reclamation plan. There are a few adequacy concerns that remain but they will not <br />affect the overall plan. Colowyo will need to provide a reclamation cost estimate that <br />addresses the changes to the mining and reclamation plans (including the changes to the <br />permanent fills, temporary fills, and mining limits) contained in TR-81. Colowyo has <br />previously submitted a reclamation cost estimate as TR-85, which remains incomplete. <br />The correct way to address changes to the reclamation cost estimate is to incorporate <br />those changes into the revision where the changes occurred. Colowyo will need to <br />submit the changes to the reclamation cost estimate as part of TR-81. At that time, <br />Colowyo can withdraw TR-85. <br />Response. Materials originally provided under TR-85 have been reformatted and are being <br />resubmitted with this submittal. As shown in the index sheet, this includes all of <br />the Reclamation Bond Tables provided in Volume 13, Exhibit 13A as well as Maps <br />34A, 35A, 36A, 38, and 39A Sheets I and 2 All references to TR-85 have been <br />removed. Upon approval of TR-81, Colowyo will withdraw TR-85. <br />As discussed, Colowyo is providing an analysis that compares the estimated impact <br />to the previously submitted reclamation bond calculation as a result of changes <br />that will occur as a result of TR-81 topography changes.