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NMD (Panels 12 -Right through 16 -Right, PR 99-05)
<br />TC will continue to mine the reserves it controls in the Twentymile Park Basin. The mine moved operations into
<br />the NMD as shown on Map 23, Mine Plan Map. TC controls all of the coal required to mine in this area. TC
<br />projects annual coal production at up to10 million tons per year.
<br />TC uses the longwall mining method as the primary technique for assuring maximum recovery of the resource. In
<br />the NMD, plans call for a 1,000 -foot wide face, with panel lengths ranging from approximately 13,600 to 17,000
<br />feet. The gate -roads, main and sub -mains will be developed by continuous miner, as is the current practice.
<br />NMD (14 -Right Gate -road Alternate Location, MR 01-171)
<br />TC evaluated whether or not the 1,000 -foot wide face could be increased to approximately 1,200 feet or wider. In
<br />general, the outcome of the evaluation limited the face width to something less than 1,200 feet. In order to
<br />accommodate tine uncertainty associated with this evaluation, and initiate the start of the gate -road, an area is shown
<br />in red on Map 23 and 23 B for potential areas in which the 14 Right Gate -road will be started.
<br />NMD (Panels 17 -Right through 21 -Right, PR03-06)
<br />The mine continues its operation into the NMD as shown on Map 23, Mine Plan Map. TC has projected annual
<br />coal production to increase from the current levels to a maximum of approximately 12 million tons per year.
<br />TC uses the longwall mining method as the primary technique for assuring maximum recovery of the resource. In
<br />Panels 17- through 21 -Right, mining continued in the NMD during this permit term with a 1,000 -foot wide panel
<br />and panel lengths ranging from approximately 10,900 to 15,700 feet. The gate -roads, main and sub -mains were
<br />developed by continuous miner, as is the current practice.
<br />NMD (Panels 21 -Right through 24 -Right (24 -Right Partial), PR06-07)
<br />The mine will continue its operations to the geologic/economic limits of the NMD as shown on Map 23, Mine Plan
<br />Map. TC projects ongoing annual coal production of up to approximately 12 million tons per year.
<br />TC uses the longwall mining method as the primary technique for assuring maximum recovery of the resource. In
<br />Panels 21- through 24 -Right, mining will continue in the NMD during this permit term with a 1,000 -foot wide
<br />panel and panel lengths ranging from approximately 9,500 to 15,700 feet. The gate -roads, main and sub -mains will
<br />be developed by continuous miner, as is current practice.
<br />WESTERN MINING DISTRICT (WMD)
<br />WMD (Panels 12- through 17 -Left, and 13- through 20 -Left Outby, PR06-07, PR09-08, PR12-09, TR07-63,
<br />TR08-64, TR09-68, TR09-71, TR13-82)
<br />TC will continue to mine the reserves it controls in the Twentymile Park Basin. Preliminary (Phase I) development
<br />of the WMD was initiated under PR06-07 and TR07-63 to facilitate extension of mine ventilation and support
<br />facilities for both the northern portion of the NMD, and the new WMD into the Northern Mining District as shown
<br />on Map 23, Mine Plan Map. TC controls all of the coal required to mine in these areas. TC projects annual coal
<br />production at up to 12 million tons per year. In preparation for future mining in the WMD, TC has proceeded with
<br />initial (Phase I) Phase 11, and Interim Phase III development of the main and sub -main entries for Panels 13 -Left
<br />through 17 -Left, as shown on the Mine Plan Map, Map 23. Phase I through Interim Phase III development will
<br />result in extension of development in the 18-, and 17 -Left gate -roads to their- furthest western limit, partial
<br />development of the 16-, 15-, 14-, 13- and 12 -Left gate -roads, and full development of the 9- and 10 -North Mains.
<br />Development of the 18-, and 17 -Left gate -roads will extend into the new Federal coal lease (COC -72980) at the
<br />western edge of the WMD. Full development and longwall mining under PR09-08 will extend development
<br />TR13-82 2.05-2.1 02/28/13
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