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Hernandez, Daniel <br />From: Hernandez, Daniel <br />Sent: Friday, September 16, 2011 4:12 PM <br />To: Ron Thompson; 'Susan Patton' <br />Subject: Adequacy Review -- New Elk Mine TR58 (Blue Seam Mine Plan) <br />Hello Ron and Susan. This e-mail will serve as our office's adequacy review of the application for Technical Revision TR- <br />58 to New Elk Coal Company's New Elk Mine (C- 1981 -012). As the Proposed Decision Due Date for TR -58 is Monday <br />September 19 at 5 pm, and as I will be out of the office for most of next week, we would appreciate it if a request for <br />an extension of the Proposed Decision Due Date to Friday September 30 were submitted by Monday the 19 <br />1. Figure 2 "Estimated Life -of -Mine Plan Area" (dated 6/13/11) appears to show an increase in the area on the map <br />identified as "Potential Future Mining Boundary" relative to the currently- approved version of Figure 2 dated <br />2/15/11. Please revise Permit Page 2.05 -3 (approved via PR -02 and Revised "8/2011 ") to include a statement <br />that "the "life of mine" acreage (Rule 2.05.2(2)) was increased under TR -58 from acres to acres as <br />shown on Figure 2 "Estimated Life -of -Mine Plan Area" (dated 6/13/11) ". <br />2. Does Map 20, Sheets 1, 2, and 3, entitled "New Elk Mine Structure Inventory Map — Overall" and dated 4/20/11, <br />need to be updated to reflect the existence of any new structures built after 4/20/11? <br />3. The proposed update to the currently- approved Exhibit 24 "Subsidence Control, Monitoring, and Mitigation <br />Plan" contains numerous references to Maxwell Seam mining. As TR -58 is a new mine plan for Blue Seam <br />mining only, and as Maxwell Seam mining within the existing New Elk Mine permit boundary has not been <br />approved under the existing New Elk Mine permit, please revise the version of Exhibit 24 proposed by TR -58 so <br />as to remove all reference to Maxwell Seam mining. <br />4. If Map 20 needs to be updated to reflect the existence of any new structures built after 4/20/11, please update <br />Exhibit 24 as necessary to (a) describe how material subsidence damage to these structures, and diminution of <br />reasonably foreseeable use of these structures (Rule 2.05.6(6)(e)(ii)), will be prevented, and (b) to add these <br />new structures to the subsidence inventory (Rule 2.05.6(6)(a) and subsidence monitoring program (Rule <br />2.05.6(6)(e)(iii)). <br />Thank you, <br />Dan <br />Daniell. Hernandez <br />Daniel I. Hernandez <br />Senior Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman St, Room 215 <br />Deriver, CO 80203 <br />New Phone Number: 303 - 866 -3567 ext 8126 <br />Fax: 303 - 832 -8106 <br />Website: www.minino.state.co.us <br />1 <br />