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Right), the Foidel Creek Mine Union Pacific railroad spur (Panels 7-Right through 10-Right), and several
<br />_ powerlines were undermined and subsided without any significant damage. Both a mine dewatering borehole and a
<br />` new ventilation shaft and escape hoist were established from the 10-Right longwall panel to support future mining
<br />operations in the NMD.
<br />On intercepting one of the two major identified fault zones within the coal reserve area, the main entries were
<br />turned to the northeast and the 3rd North Mains were extended approximately 4,000 feet, ramping up through the
<br />fault zone. Where the main entries intercepted the coal seam on the east side of the fault, the mains were turned
<br />back to the northwest and the 5th North Mains were extended approximately 6,000 feet to develop the NMD. As an
<br />extension the 3rd North Mains, the 4th North Mains were developed, and the headgate and tailgate entries for
<br />Longwall Panel 12 were driven from the 4`h North Mains to initiate development of the NMD. During initial
<br />development of the NMD, a 300-foot barrier pillar was established between the Eastern and Northern Mining
<br />Districts. From the fault-crossing, sub-mains were progressively developed to the east-northeast off the 5th North
<br />Mains for Panels 13-Right through 17-Right. In this portion of the NMD, panel widths were expanded to
<br />approximately 1,000 feet, and panel lengths extended up to 16,000 feet. To maintain adequate ventilation airflows,
<br />a new ventilation shaft was established off the 5th North Mains, in-line with the 15-Right Longwall Panel. During
<br />mining of Panels 12-Right through 17-Right, a portion of Foidel Creek (Panel 12-Right), a portion of Fish Creek
<br />(Panels 13-Right through 17-Right), the Foidel Creek Mine Union Pacific railroad spur (Panels 12-Right through
<br />17-Right), and several powerlines were undermined and subsided without any significant damage.
<br />At the northern limit of Panel 17, the Mains were turned back to the west, and the 6th North Mains were extended
<br />approximately 2,400 feet, both in preparation for future development of the WMD, and to maintain maximum panel
<br />length for mining of the remainder of the NMD. The 7t'' North Mains were extended approximately 7,500 feet to
<br />the northwest, off the 6th North Mains, to support development and mining of Panels 18-Right through 23-Right in
<br />the NMD. Panel widths in this portion of the NMD have been maintained at approximately 1,000 feet, and panel
<br />lengths vary up to approximately 14,000 feet. Continuing development of mine ventilation facilities, to maintain
<br />adequate ventilation airflow, included construction of a new ventilation intake shaft, equipped with an emergency
<br />' escape hoist and ventilation air heater, on the eastern end of the 18-Right Longwall Panel.
<br />At roughly the center of Pane123-Right, the mains were turned to the north, and the 8"' North Mains were extended
<br />approximately 3,000 feet to the northern limit of the mineable coal reserves. Development and mining of the NMD
<br />will be completed with mining and recovery of the remaining coal reserves in Panels 23-Right through 25-Right.
<br />Given decreasing panel lengths for Panels 20-Right through 25-Right, increasing grades as the coal seam turns up
<br />along the margins of the reserve area, and associated ground control and coal quality issues, the potential exists that
<br />the final panels (Panels 24-Right and 25-Right) may be only partially mined or eliminated. In order to provide
<br />adequate ventilation airflow for both the northern portion of the NMD and future development of the WMD, a new
<br />intake ventilation air shaft was established over the 6-North Mains intersection. The shaft is equipped with an
<br />emergency escape hoist and ventilation air heater, and other mine infra-structure (electrical substation and power-
<br />drop boreholes, mine dewatering borehole and surface storage facilities, rock-dust storage tank and borehole,
<br />compressor station and compressed air borehole, and bulk-material drop borehole) has been established to serve
<br />both the Northern and Western Mining Districts.
<br />To support development and future mining of the WMD, the 6t'' North Mains will be extended approximately 600
<br />feet further to the west, and the new 9th North Mains will be extended approximately 6,900 feet to the southeast to
<br />connect back to the 3rd North Mains. Panels 13-Left through 17-Left will be developed from both the 6th Main
<br />North extension, and the 9th North Mains. Development and mining of the WMD will be phased, with initial
<br />development (Phase I) of sub-mains and headgate and tailgate entries for Panels 17-Right through 19-Right
<br />previously approved under TR07-63, development of the the 9th North Mains and remaining headgate and tailgate
<br />entries up to the limits of the pending federal coal lease under Phase II (TR08-64), and remaining panel
<br />development, mining of the WMD, and construction of required surface facilities under Phase III, which will be
<br />~~ addressed by a future revision to the approved permit. Panel widths in the WMD will be maintained at
<br />' approximately 1,000 feet, and panel lengths will vary up to approximately 20,000 feet. Approximately 45,000 feet
<br />of mains are expected to be driven over the life-of--mine.
<br />TR08-64 2.05-13 06/17/08
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