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a, <br />//® Kennecott <br />~ .Energy <br />Colowyo Coal Mine <br />5731 State Wghway 13 <br />Meeker. Colorado 81641 <br />Telephone: (970) 824-1579 <br />Fax: (970) 824-1598 <br />November 17, 2005, Hand Delivered <br />Tay Tonossl <br />' ""~ P` r FrT' "~p Environmental Engineer <br />Mr. Tim Stark NUV 17 2005 <br />Environmental Protection Specialist gyj6wn of Minerals and Geology <br />Colorado Division of Minerals & Geology <br />1313 Sherman Street -Room 215 <br />Denver, Colorado 80203 <br />RE: Technical Revision No. 61, Change in Reclamation Bond Colowyo Coal Mine, <br />Permit No. C-81-019. <br />Dear Mr. Stark, <br />As we have discussed, enclosed please find three copies each of the following materials which <br />have been prepared to present the revised Reclamation Bond cost model. Specifically, Technical <br />Revision No. 61 addresses Item No. 49 of the Mid-Term Review. Also included is a tracking <br />sheet relative to this change. <br />You will note that with the proposed tracking sheet, we are proposing the most of existing Exhibit <br />13 (Volume 4) gets deleted and is replaced with the revised bond calculations. This includes <br />some of the supporting information contained in Appendices A, B, C, and D of Exhibit 13. <br />Existing Appendix E needs to remain, primarily because of the correspondence relative to bond <br />release. We are proposing that new Appendices A, B, and C to Exhibit 13 be used to provide <br />supporting information for the revised bond model. <br />Also included with this submittal is a comment/response package specifically addressing the <br />individual review comments related to Item 49 of the Mid-Term Review. Note that while the <br />bond model addresses changes to Map 36 and Map 38; these revised maps will be resubmitted <br />under MR-75 as they are also related to other review comments. <br />The enclosed binder is a temporary housing for these materials and can be discazded following <br />public comment and subsequent incorporation into Volume 4. <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 />Sin~ce• ~~ <br />Tay Ton zi <br />Senior Environmental Engineer <br />Encl. 3 copies <br />Cc: file CF 1.1.2.50 2005 w\encl <br />Public Permit w\encl <br />Antelope Mine • Cobwyo Mine • Cordaro Rojo Mine • Jacobs Ranch Mine • Spring Creek Mine <br />A member of the Rio Tinto Group <br />