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EMD (Panels 2-Right through 6-Right, PR97-04) <br />During the 1993-1998 five-year permit term, mining continued in the EMD. Initial development of gateroads in the <br />EMD encountered a previously unidentified fault. Conditions associated with this fault required TCC to redesign the <br />submains and mains; with their new locations as shown on Map 23. Development mining occurred in Gateroads 2- <br />Right through 4-Right in the EMD. Longwall mining occurred in Panels 6-Right through 2-Right in the remainder of <br />the EMD. These mining areas are shown on Map 23. <br />Longwall Panels 6-Right through 2-Right involved mining of coal contained in Federal leases COC-54608, C-081330, <br />and D-052543, and fee coal owned by TCC. Development of Gateroads 4-Right through 2-Right involved mining coal <br />from Federal lease COC-54608, and fee coal owned by Twentymile. Development of the Northeast Submains involved <br />mining of coal from Federal leases C-081330 and COC-54608. <br />NORTHERN MINING DISTRICT <br />NMD (Pane112-Right through 16-Right, PR99-0~ <br />During the 1998-2003 five-year permit, mining continued in the EMD (as approved in Permit Revision PR97-04) and <br />progressed into the NMD. Development mining continued in Gateroad 11-Right through 18-Right, the Northeast and <br />Northwest Mains, and Longwall Panels 12-Right through 16-Right. The mining area is shown on Map 23. <br />Mining of Longwall Panels 12-Right through 16-Right involve mining of coal from Federal lease COC-54608, State <br />lease CO-3229, and fee coal owned by TCC. Gateroads 11-Right through 18-Right involved mining coal from the <br />same leases as described for the longwall panels. In the Northeast Mains, in addition to Federal lease COC-54608, and <br />State lease CO-3229, coal was mined from the Myron Walker Trust lease. <br />NMD (Pane117-Right through 21-Right, PR03-06) <br />During 2003-2008, mining will continue in the NMD. Development mining will continue in Gateroads 18-Right <br />through 24-Right, the bleeders, the Northwest Mains, and Longwall Panels 17-Right through 22-Right (partial). The <br />mining area is shown on Map 23. <br />Mining of Longwall Panels 17-Right through 22-Right will involve mining of coal from State lease CO-3229 and fee <br />coal owned by TCC. Gateroads 18-Right through 24-Right and the associated bleeders will involve mining coal from <br />the same leases as described for the longwall panels. The Northwest Mains will mine coal from State lease CO-3229. <br />NMD (Pane121-Right through 24-Right (partial), PR06-07, TR07-63) <br />During 2006-2008, mining will continue in the NMD. Development mining will continue in Gateroads 21-Right <br />through 24-Right, the bleeders, the Northwest Mains, and Longwall Panels 21-Right through 24-Right (partial). The <br />mining area is shown on Map 23. Alignment of development entries may be adjusted, as necessary, to address <br />geologic conditions. <br />Mining of Longwall Panels 21-Right through 24-Right will involve mining of coal from federal lease COC-20900 (as <br />modified June 22, 2007), State lease CO-3229, fee coal owned by TCC, and to be obtained by TCC (federal lease sale <br />scheduled for October 6, 2006). Gateroads 18-Right through 24-Right and the associated bleeders will involve mining <br />coal from the same leases as described for the longwall panels. The Northwest Mains will mine coal from State lease <br />CO-3229 and fee coal owned by TCC. <br />TR08-64 2.05-7.1 06/17/08 <br />