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under COC -54608 for Sections 21, 22, and 23, T5N, R86W in conjunction with mining plans for the Wolf Creek <br />Reserve. TC filed a Lease Modification application for the coal reserves contained in the Wolf Creek Coal Seam in <br />portions of Sections 21 and 22, T5N, R86W, which was approved by the BLM and was issued and became <br />effective on April 1, 2016, and will be filing a Lease by Application for the remainder of these federal reserves <br />(portions of Sections 22 and 23) during 2016. <br />Maps 23A, WC23, and WC23A identify previously mined areas, and delineate active and planned future mining <br />areas at a more detailed scale. Evaluations of projected subsidence and related effects, initially based on subsidence <br />modeling, and subsequently confirmed by actual mining and subsidence monitoring experience, indicate that <br />subsidence would not significantly impact the designated AVF or related environmental values. For actual and <br />potentially impacted portions of the designated Fish Creek AVF, the subsidence evaluation approach and <br />conclusions are documented by Exhibits 713, 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. Tile 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 N 1/2 of Section 36, T5N, R87W, and the W/2NR/4 and the NW/4 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 />PR 14-10 2.05-3.1 04/28/16 <br />