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West Elk Mine minable coal reserves in these leases occur in two of the six seams (the E and B Seams). The northern B Seam reserves have been mined and the E Seam will continue to be mined as projected on Map 51. The past and projected B scam mining is shown on Map 52. MCC mined in the F Scam from 1982 to 1991 from Lease D-044569 and C-0117192. This mining was only marginally successful. Poor mine roof conditions, sandstone channels, thin coal, poor coal quality, and other unfavorable conditions negatively affected mining and rendered this seam uneconomic under past and present market conditions. Approximately 180 feet below the F Seam horizon lies the E Seam. Approximately 400 feet below F Seam and 200 feet below E Seam lies the B Seam. The northern mineable B Seam reserves contained some areas of coal, particularly in Federal Leases D-044569, C-0117192, COC -54558, and COC -56447 where no mineable E Seam exists above the B Seam. As such, B Seam mining in this area caused no issues for E Seam. Recovering the two economically viable seams at West Elk Mine requires thorough evaluation of various mining scenarios. The mineable areas of the E and B Seams can be seen by comparing Map 13 (B Seam thickness) with Map 18 (E Seam. thickness). E and B Seam projected operations, maximizing the recovery of reserves, are shown on Maps 51 and 52, respectively. MCC has assessed the recoverable coal reserves of the Federal coal leases contained in the E and B Seams. As of early 2015, approximately 57.7 million tons of recoverable reserves were estimated to remain in the E and B Seams (Table 28) within the current permit and lease areas. The mine plan was laid out to recover as much coal as possible with consideration for personnel and equipment safety and surface protection. The percent of recovery in the development (room and pillar) sections is approximately 40-60 percent, more or less, depending upon pillar design. Longwail _pa.aui ='� �ccion methods increase that extraction ratio to 80-90 percent for the mining height, which is planned at approximately 12.0 feet for the B Seam and 8.0 to 14.0 feet for the E Seam. The overall recovery of the mine layout has not been calculated, because it varies continuously with changes in mine plans. Coal recovery depends on the method of coal extraction. Using room and pillar methods, MCC recovered about 50 percent of coal reserves in the F Seam. With the longwall mining method, MCC recovered and plans to recover about 80 percent of the thickness mined for the coal reserves of the B and E Seams (Table 29), based upon current aline plans. Anticipated annual production is shown with expected employment needs in Table 32, (Section 2.05.3). 2.05-4 Rev. 11/04-PRII, 03/06- PRIG, 05/15- TR137; 07/15- MR413 - Table 28 Estimate of Recoverable Coal Reserves at the West Elk Mine Recoverable Reserves (millions of tons) Lease Lease Lease Lease Lease Other Seam COC -56447 COC -67232 C-1362 b-044569 & COC -54558 & COC -67011 C-0117192 Fee Lease Total B 0.5 7.5 23.4 0.0 0.0 0.01 31.4 E 0.0 1.7 22.3 0.0 0.0 2.3 26.3 Total 0.5 1 9.3 45.7 0.0 1 0.0 23 57,7 The mine plan was laid out to recover as much coal as possible with consideration for personnel and equipment safety and surface protection. The percent of recovery in the development (room and pillar) sections is approximately 40-60 percent, more or less, depending upon pillar design. Longwail _pa.aui ='� �ccion methods increase that extraction ratio to 80-90 percent for the mining height, which is planned at approximately 12.0 feet for the B Seam and 8.0 to 14.0 feet for the E Seam. The overall recovery of the mine layout has not been calculated, because it varies continuously with changes in mine plans. Coal recovery depends on the method of coal extraction. Using room and pillar methods, MCC recovered about 50 percent of coal reserves in the F Seam. With the longwall mining method, MCC recovered and plans to recover about 80 percent of the thickness mined for the coal reserves of the B and E Seams (Table 29), based upon current aline plans. Anticipated annual production is shown with expected employment needs in Table 32, (Section 2.05.3). 2.05-4 Rev. 11/04-PRII, 03/06- PRIG, 05/15- TR137; 07/15- MR413