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Hernandez, Alysha <br />From: Burgmaier, Susan <br />Sent: Monday, November 21, 2011 8:51 AM <br />To: Hernandez, Daniel <br />Cc: Binns, Janet; Zuber, Rob; Hernandez, Alysha <br />Subject: RE: Colowyo Mine (C1981019) Minor Revision No. 113 <br />Attachments: colowyo mr113 ays.pdf <br />Dan — I updated AVS with the latest ownership and control information for Western Fuels- Colorado, LLC and Tri -State <br />Generation and Transmission Association, and then ran your requested AVS check. There are no violations reported for <br />Western Fuels- Colorado or its parent corporation, Tri -State Generation and Transmission Association. When the <br />acquisitions of Colowyo Coal Company, Kennecott Colorado Coal Company, and Taylor Creek Holding Company are <br />complete I will need to update AVS again; so please let me know when the sale is complete. A copy of the AVS report is <br />attached. <br />Susan L. Burgmaier <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver CO 80203 <br />303 - 866 -3567 x 8111 <br />From: Hernandez, Daniel <br />Sent: Sunday, November 20, 20114:22 PM <br />To: Burgmaier, Susan <br />Cc: Binns, Janet; Zuber, Rob <br />Subject: FW: Colowyo Mine (C1981019) Minor Revision No. 113 <br />Susan — <br />Here are Colowyo's responses to your 4 AVS questions pertaining to Colowyo's MR -113 (change in parent <br />company). Let me know if you need anything else. <br />Thanks, <br />Dan <br />From: Guptill, Matthew D (CCC) [mailto: Matt. Guptill@riotinto. corn] <br />Sent: Wednesday, November 16, 2011 12:43 PM <br />To: Hernandez, Daniel <br />Subject: FW: Colowyo Mine (C1981019) Minor Revision No. 113 <br />Dan, <br />Below are the answers to your groups' questions. If you need anything else from us please let me know. Have a <br />good Thanksgiving if I don't talk to you before then. <br />Matthew Guptill <br />Technical Services Manager <br />Colowyo Coal <br />