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The general operations plan for the Foidel Creek Mine is illustrated on Map 23, Mine Plan. This map shows the <br />planned schedule for Life-of--Mine mine advance. Separate five-year renewals will be obtained and incremental <br />performance bond will be posted, as necessary. The Mine Permit Area encompasses a total of approximately <br />• 2],720 acres. The current permit area acreage reflects a reduction in acreage of approximately ],320 acres due to a <br />permit boundary modification (TROS-51). Total permitted affected and disturbed acreages are approximately <br />10,920 acres and 491.6 acres, respectively. <br />As shown on Maps 1 and 2, there are two parcels of unleased federal coal and one parcel of unleased federal coal <br />overlain by federal surface. For quick reference, the parcels are located in portions of Sections 5, 19, and 20 of <br />TSN, R86W, and portions of Section 33, T6N, R86W. <br />Twentymile Coal Company understands that the Bureau of Land Management maintains conVol of the coal within <br />these areas. Further, it is understood that the BLM controls surface usage of the parcel of land located in the SW'/< <br />SW'/< Section 33, T6N, R86W. <br />Map 23A presents the initial mining area at a more detailed scale. The mining projections are for the initial five <br />year period. This map has been revised to reflect partial extension of Panels 5 and 6 under portions of the <br />designated Fish Creek AVF. Panel extension was not contemplated under the original Foidel Creek mine plan. <br />Subsequent evaluation of projected subsidence and related effects based on actual mining experience, however, <br />indicated that subsidence would not significantly impact the designated AVF or related environmental values. For <br />the potentially impacted portion of the designated Fish Creek AVF, the subsidence evaluation approach and <br />conclusions are documented by Exhibits 7B, 7C, 45, and 46 and by appropriate revisions to Exhibit 14. <br />The proposed subsidence monitoring network for the longwall area is shown on Map 23A. Mapped subsidence <br />survey lines include the supplemental monitoring stations to be established for evaluation of potential subsidence <br />impacts in the effected portion of the designated Fish Creek AVF. <br />SOUTHWEST MINING DISTRICT <br />Twentymile Coal Company, through the acquisition of the unleased federal coal reserves located in the Southwest <br />Mining District, added additional recoverable reserves to its existing mine plan. The Southwest Mining District <br />lease application was submitted to the Bureau of Land Management on January 27, 1992, and subsequently <br />approved. <br />The federal lease area is located in the Nl/2 of Section 36, TSN, R87W, and the W/2N E/4 and the NW/4 of Section <br />31, TSN, R86W. The lease application comprises approximately 537 acres. Overlying surface areas (split-estate) <br />are controlled by three different landowners, Twentymiie Coal Company, Robert Perry, and Robert Perry et al. <br />Twentymile Coal Company extended the 2- and 3-Southwest Panels to the west. The 2-Southwest Panel was <br />extended approximately 300 feet to the west and the 3-Southwest panel will be extended approximately 700 feet to <br />the west. The modified mine projections are shown on Maps 23 and 23A, Mine Plan. These extensions allow for <br />recovery of the additional reserves in the newly acquired federal lease. <br />• <br />PR06-07 2.05.3 12/05/06 <br />