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Kurtis Blunt Ilk O° <br />?• Colowyo Coal Company <br />5731 State Hi <br />hwa <br />13 ?- <br />`?©10 <br /> g <br />y n <br />?vN <br /> Meeker, CO 81641 <br /> T: 970-824-1531 <br /> <br /> <br /> May 28, 2010 <br /> Mr. James R. Stark <br /> Environmental Protection Specialist <br /> Colorado Division of Minerals and Geology <br /> Department of Natural Resources <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br />Re: Colowyo Mine C-1981-019 <br />Colowyo's Third Response to Technical Adequacy of TR-82 <br />Dear Mr. Stark: <br />Based upon our discussions during the week of May 17, 2010 Colowyo has modified the <br />submitted materials to resolve issues raised by the Division during the second round of <br />technical adequacy regarding variable topsoil replacement depths. <br />Your comments and Colowyo's response is as follows: <br />Re: Colowyo Mine C-1981-019 <br />Preliminary Adequacy Review - Technical Revision 82 <br />Dear Mr. Blunt: <br />The Colorado Division of Reclamation, Mining and Safety (Division) has received the <br />Colowyo Coal Company, LP's (Colowyo) responses to the Division's 23 November 2009 <br />Preliminary Adequacy Review Letter. The Division has reviewed the responses and has <br />the following comments and adequacy questions. <br />Rule 2.05.4 - Reclamation Plan <br />1. Colowyo has provided footnotes to the topsoil replacement depth generic cross- <br />section on amended page 2.05-46. The footnotes describe three replacement <br />zones for the post-2007 reclamation in the original permit area (West Pit), and <br />four replacement zones for the South Taylor expansion area. The presentation is <br />still somewhat confusing because only one cross-section is depicted, showing <br />three replacement zones (which reflects the West Pit plan, but not the South <br />Taylor plan). Also, the replacement thickness for South Taylor lower slope areas