2014-11-17_PERMIT FILE - C1982056A (5)

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WESTERN MINING DISTRICT WMD (Panels 12 -Left through 20 -Left and 14- and 15 -Left Inby; PR06 -07, PR09 -08, TR07 -63, TR08 -64, TR09- 68, TR09 -71) During 2007 -2008, and the subsequent permit term (2008- 2012), mine development (Phase I, II, and Interim III) will progress in the WMD, with final Phase III development and actual longwall mining proceeding following approval of a permit revision application (PR09 -08) addressing these activities. In preparation for future mining in the WMD, TC will proceed with development of main and sub -main entries for Panels 13 -Left through 17 -Left. Alignment of development entries may be adjusted, as necessary, to address geologic conditions. Phase I through Interim Phase III development will result in extension of development in the 18 -, and 17 -Left gate - roads to their furthest western limit, partial development of the 16 -, 15 -, 14, and 13 -Left gate- roads, and full development of the 9- and 10 -North Mains. Development of the 18 -, 17- and 16 -Left gate -roads will extend into the new Federal coal lease (COC- 72980) at the western edge of the WMD. Under the full WMD development and mine plan modification approvals (PR09 -08 and TR09 -71) development of Gate -roads 12 through 20 -Left, 13- through 15 -Left Inby, the associated bleeder entries, and mining of Panels 12- through 20 -Left and 14- and 15 -Left Inby will involve mining coal from Federal Coal Leases COC -20900 (as modified June 22, 2007) and COC- 72980, State lease CO -3229, and fee coal leased by TC from NRC -CO 1, LLC, LLC. WOLF CREEK RESERVE (WCR) WC (Panels WC -1 through WC -5, TR13 -83) TC plans to initiate construction of the rock -slope to access the WCR in 4 "' quarter 2014. The rock -slope access will consist of three entries driven approximately 670 feet at a 12 percent grade from the 5 -Main North Entries down to the Wolf Creek Seam. Based on known geologic conditions, the first 130 feet of the rock -slope will require supplemental support in the form of steel arch supports and a multi -plate liner. The remainder of the rock -slope will be driven in competent rock using conventional supports (resin - grouted bolts with strap and steel mesh). Rock materials removed during construction of the rock -slope access will remain underground, with placement in the un -used rock -belt entry in the 5 -North Mains. It is anticipated that limited ongoing dewatering will be required, with extension of existing systems to serve the Wolf Creek development, and transfer of mine inflows and excess water from dust control through existing systems into abandoned and sealed workings in the SWMD and WMD. Once the rock -slope reaches the Wolf Creek Seam, TC will proceed with development of main entries to access Panels WC -1 and WC -2 and the gate -road and bleeder entries for the WC -1 and WC -2 longwall panels. Subsequent development will include development of a separate set of mains to access Panels WC -3 through WC -5 and potential future reserves, and development of the gate -road and bleeder entries for Panels WC -3 through WC -5, as shown on Map 23. The initial rock - slope, most of Panels WC -1 and WC -2, and roughly half of Panels WC -3 through WC -5 will be developed in State coal under existing lease CO -3229. A small portion of Panel WC -2 and about half of Panels WC- 3 through WC -5 will be developed in TC's fee coal reserves. Alignment of development entries may be adjusted, as necessary, to address geologic conditions. TR13 -83 2.05 -7.2 12/23/13