2011-02-15_REVISION - C1980004 (2)

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Corey Heaps McCIane Canyon Mining, LLC February 15, 2011 page 12 Rules 2.05.3 (8) and 4.10 —Coal Mine Waste and Non -Coal Processina Waste 52. The first two paragraphs on page 2.05 -30 indicate that, initially, topsoil and cover material will be salvaged from about half of the proposed CMWP footprint. Please describe which portion of the footprint will be developed first, and delineate that area on Figure 2.2 -2. 53. The second paragraph on page 2.05 -30 says that cover material will be salvaged to a depth of 6 to 8 feet. Please revise Section A -A' on Figure 2.2 -2 to depict the proposed limits of cover material salvage beneath the original ground surface. 54. Due to the size of the proposed CMWP, and the presence of the potential man -made fill beneath, please provide an additional cross section of the pile (on Figure 2.2 -2) that is oriented approximately perpendicular to Section A -A'. Appendix R — Stability Evaluation of Proposed Waste Pile by Buckhorn Geotech (Sep -2010) 55. A similar stability evaluation (study) was conducted by Buckhorn in 2007, and was incorporated into the permit (as Appendix R) with TR -16. TR -16 approved the development of a smaller Coal Mine Waste Pile (CMWP) adjacent to McClane Canyon. For the 2007 study, five boreholes were drilled within the footprint of the proposed CMWP; a sixth borehole was drilled 650' to the southwest, and finished as a monitoring well. 56. It is not clear from the current PR -02 submittal whether Buckhorn's 2010 study is intended to replace the 2007 version, or whether the new report is provided as a supplement. Some portions of the earlier study have been reiterated in the current submittal, while others are missing entirely. Please clarify the intent (to replace or to supplement the 2007 version) of the 2010 report, and revise its contents accordingly. 57. Table of Contents a. Exhibit A, as provided, is a CMWP plan, not Vicinity Map. Please revise the TOC reference or add a vicinity map to the exhibits and rename the CMWP plan. b. Appendix A — Laboratory Index Test Results — the results are not provided (but are available in 2007 study). Please provide them here, or reference the 2007 study. C. Appendixes C, C.1,.C.2, and C.3 are not provided. Please provide these sections of the study for review and inclusion in the application. d. Borehole #6 drill log and GW -9 data are provided with the report, but are not referenced in the TOC. Please reference these two items. 58. Section 1.0 — Introduction