2015-09-24_REVISION - C1982056 (4)

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TWENTYMILE COAL, LLC - FOIDEL CREEK MINE MR15-287, WCR OFFSET DRILL ZONES AND WC -030 ADEQUACY RESPONSES (09/15) 1) Proposed revised page 2.04-9.1 is missing information from the currently approved page. The section discussing the 15 -Left Rock Dust Tank Installation and 16 -Left Utility Borehole is missing currently approved information regarding the 5M7V Cement Borehole and Pipeline from MR283 and MR288. Please revise this page to include the missing information. Response: The referenced page has been reviewed and revised to incorporate the currently approved permit text. Copies of the revised pages are provided with these responses for replacement in the PAP. 2) Proposed revised page 2.05-17.3 is missing information from the currently approved page. The top of the page is missing information regarding field operations for the 2012 WMD seismic survey. Given this, information from the currently approved page 2.05-17.4 has moved up on the document and is now on revised page 2.05-17.3. Please revise this page to include the missing information and ensure that the text follows with the previous and next page. Response: The referenced pages have been reviewed and revised to incorporate the currently approved permit text. Copies of the revised pages are provided with these responses for replacement in the PAP. 3) Revised page 2.04-9.1 indicates Twentymile Coal, LLC (TC) intends to drill 36 potential coreholes. Revised page 2.05-17.3 indicates TC intends to drill up to 46 coreholes. Based on the Division's review of the previous revisions regarding the Wolf Creek Reserve Coal Corehole project, with the approval of MR -287, TC will have approval to drill 46 coreholes. Please clarify the discrepancy between the two revised pages. Response: The number representing the total number of coreholes under the referenced MR's (page 2.04-9.1) had not been updated to include the 10 coreholes under MR14-280. For reference, the following summarizes the total number of permitted coreholes for the WCR to date: Revision' Number of Coreholes MR13-269 4 MR13-272 6 MR14-275 4 MR14-276 12 MR14-278 2 MR14-280 10 MR15-287 8 Pages 2.04-9.1 and 2.05-17.3 have been revised for consistency, and copies of the revised pages are provided with these responses for replacement in the PAP. 4) The Division has reviewed the Cultural Resource Survey submitted to the Division on August 21, 2015 by Metcalf Archaeology. The survey covered the proposed drillhole WC -030 area. However, it did not cover the three strips of land proposed as exploration zones depicted on Figure EX52-F7 submitted with the application. Based on our telephone conversation yesterday and an email you