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under COC -54608 for Sections 21, 22, and 23, T5N, R96W in conjunction with mining plans for the Wolf Creek <br />Reserve, and has filed a Lease Modification application, which is expected to be finalized in late 2015. <br />Map 23A identifies previously mined areas, and delineates active and planned future mining areas at a more <br />detailed scale. Evaluations of projected subsidence and related effects, initially based on subsidence modeling, and <br />subsequently confirmed by actual mining and subsidence monitoring experience, indicate that subsidence would <br />not significantly impact the designated AVF or related environmental values. For actual and potentially impacted <br />portions of the designated Fish Creek AVF, the subsidence evaluation approach and conclusions are documented by <br />Exhibits 7B, 7C, 7K, 45 and 46 and by appropriate revisions to Exhibit 14. <br />The subsidence monitoring network for the longwall areas is shown on Maps 23A and WC23. 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 />SOUTHWESTERN MINING DISTRICT <br />TC, through the acquisition of the un -leased federal coal reserves located in the SWMD, added additional <br />recoverable reserves to its existing mine plan. The SWMD lease application was submitted to the BLM on January <br />27, 1992, and was subsequently approved. <br />The lease application area is located in the N1/2 of Section 36, T5N, R87W, and the W/2NR/4 and the NWA of <br />Section 31, T5N, R86W. The lease application comprises approximately 537 acres. The surface of this coal is <br />controlled by three different landowners, TC, Robert Perry, and Robert Perry et al. <br />TC extended the 2- and 3 -Southwest Panels to the west. The 2 -Southwest Panel was extended approximately 300 <br />feet to the west and the 3 -Southwest Panel was extended approximately 700 feet to the west. The modified mine <br />projections are shown on Maps 23 and 23A, Mine Plan. The panel extensions allowed for the recovery of <br />additional reserves in the newly acquired federal lease. <br />PRi5-1 i 2.05-3.1 07/06/15 <br />