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2.05.3(2) Operation Description - Permit Area <br />Underground coal mining operations began in the permit area in 1899 and have <br />run intermittently until the present time. Operations using current mining methods <br />began in 1974. From 1974 to 1999, approximately 242 acres of surface lands were <br />disturbed in conjunction with mining operations. Disturbance of additional surface <br />lands during the life of the permit is only planned for above the South Portal to repair <br />hydrologic communication as approved by TR -69 in 2017. Exhibits 6A through 11A, <br />13C, 51 and 52, Tab Section 13, and Figure 14-17, Tab Section 14 show the location <br />of each disturbed, or approved disturbed, surface area and Table 13-1 describes the <br />buildings and structures in each area. In the period from 1974 through 1999, a total of <br />3,523 acres were affected in conjunction with underground mining activities. Between <br />1993 and 1997, 566 acres were affected. Table 12-1 presents areas disturbed to <br />date. Table 12-2 presents the acres affected by the North and South Portal workings <br />through 1999. The underground mining sequence and aerial extent of affected lands <br />is depicted in Exhibit 5 and Appendix 12-2. A significant portion of the above <br />described affected acres have been released by SL -3 through SL -10 from 2008 <br />through 2017, leaving a total of 302.3 acres affected within the permit boundary. The <br />new permit acres are presented in Table 3-7. <br />Mining ceased at the Roadside Portals on December 2, 1999. The North Mine <br />was sealed during January and February 2000. The Roadside South Mine was <br />sealed during April 2000. <br />C -SEAM EXPLORATION <br />In September 1999, all C -Seam coal production was halted after a decision to <br />suspend the operations of the mine was made. Better quality coal and better mining <br />conditions found in the Cameo B Seam retreating section allowed the operator to mine <br />coal at the most efficient levels during the months leading up to the suspension. <br />The following is a summary of the rationale for mining the C -Seam, the <br />conditions found while mining and the mechanism employed in the mining of the C - <br />Seam. <br />RN -7 12-3 Rev 10/17 <br />