|
WESTERN MINING DISTRICT
<br /> WMD(Panels 12-Left through 20-Left and 14-and 15-Left Inby; PR06-07, PR09-08, TR07-63, TR08-64,TR09-
<br /> 68,TR09-71)
<br /> During 2007-2008, and the subsequent permit term (2008-2012), mine development (Phase I, II, and Interim III) will
<br /> progress in the WMD,with final Phase III development and actual longwall mining proceeding following approval of a
<br /> permit revision application(PR09-08) addressing these activities. In preparation for future mining in the WMD, TC
<br /> will proceed with development of main and sub-main entries for Panels 13-Left through 17-Left. Alignment of
<br /> development entries may be adjusted, as necessary, to address geologic conditions.
<br /> Phase I through Interim Phase III development will result in extension of development in the 18-, and 17-Left gate-
<br /> roads to their furthest western limit, partial development of the 16-, 15-, 14, and 13-Left gate-roads, and full
<br /> development of the 9- and 10-North Mains. Development of the 18-, 17- and 16-Left gate-roads will extend into
<br /> the new Federal coal lease(COC-72980) at the western edge of the WMD. Under the full WMD development and
<br /> mine plan modification approvals (PR09-08 and TR09-71) development of Gate-roads 12 through 20-Left, 13-
<br /> through 15-Left Inby, the associated bleeder entries, and mining of Panels 12- through 20-Left and 14- and 15-Left
<br /> Irby will involve mining coal from Federal Coal Leases COC-20900 (as modified June 22, 2007) and COC-72980,
<br /> State lease CO-3229,and fee coal leased by TC from NRC-CO 1, LLC, LLC.
<br /> WOLF CREEK RESERVE(WCR)
<br /> WCR(Development and Mining of Panels WC-4RT through 9RT,TR13-83,TR18-92,PR14-10,PR15-11)
<br /> TC plans to initiate construction of the rock-slope to access the WCR in 40' quarter 2014. The rock-slope access will
<br /> consist of three entries driven approximately 670 feet at a 12 percent grade from the 5-Main North Entries down to the
<br /> Wolf Creek Seam. Based on known geologic conditions, the first 130 feet of the rock-slope will require supplemental
<br /> support in the form of steel arch supports and a multi-plate liner. The remainder of the rock-slope will be driven in
<br /> competent rock using conventional supports (resin-grouted bolts with strap and steel mesh). Rock materials removed
<br /> during construction of the rock-slope access will remain underground,with placement in the un-used rock-belt entry in
<br /> the 5-North Mains. It is anticipated that limited ongoing dewatering will be required, with extension of existing
<br /> systems to serve the Wolf Creek development,and transfer of mine inflows and excess water from dust control through
<br /> existing systems into abandoned and sealed workings in the SWMD and WMD.
<br /> Once the rock-slope reaches the Wolf Creek Seam, TC will proceed with development of the Wolf Creek main entries,
<br /> which will serve the entire reserve. Initially, the WCR Mains will provide access for development and nursing of
<br /> Panels WC-7RT through 9RT. The Mains will subsequently be extended to the south to access Panels WC-4RT
<br /> through 6RT. Once the Mains are in place, gate-road and bleeder entries will be developed progressively for the
<br /> longwall panels, as shown on Map WC23. The anticipated panel sequence takes into account geologic constraints,coal
<br /> production requirements, and mine drainage and dewatering considerations, and is anticipated to progress from WC-
<br /> 9RT through 5RT, followed (will require additional permit approvals) by WC-4RT through IRT or WC-11RT
<br /> throughl4RT, dependent on the timing of dewatering operations. With a better understanding of structural constraints,
<br /> based on previous drilling and ongoing mining operations, TC plans to extend the 7-East longwall panel (Panel
<br /> designation changed from WC-7RT to avoid confusion with Wadge Seam panel designations) approximately 1,400
<br /> feet to the east. TC also plans to develop an internal ventilation and utility shaft between the Wolf Creek and Wadge
<br /> seam workings. The shaft will be roughly 20 to 24 feet in diameter, will be completed by either raise-bore or
<br /> conventional sink methods,and will be cement or grout lined.
<br /> The initial rock-slope, Mains, and the initial gate-roads for Panels WC-7RT through 9RT will be developed in State
<br /> coal under existing lease CO-3229. The remainder of these panels and most of Panels WC-4RT through 6RT will be
<br /> developed and mined in State and fee coal that is either owned or controlled by TC through lease. Development and
<br /> mining of the western portions of Panels WC-5RT through 6RT will be in leased Federal coal. Future development of
<br /> the northern panels (WC-1IRTthrough 14RT) will also be in State and fee coal that is either owned or controlled by
<br /> TC through lease. Alignment of development entries and panels may be adjusted, as necessary, to address geologic
<br /> conditions and drainage constraints.
<br /> TRI 8-92 2.05-7.2 09/26/18
<br />
|