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 3` 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 5' North Mains were extended approximately 6,000 feet to develop the NMD. As an
<br />extension the 3` North Mains, the 4' North Mains were developed, and the head -gate and tailgate entries for
<br />Longwall Panel 12 were driven from the 4' 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 5' 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 5' 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 6' 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 7' North Mains were extended approximately 7,500 feet to
<br />the northwest, off the 6' 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 Panel 23- Right, the mains were turned to the north, and the 8 1h 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 6' North Mains will be extended approximately 600
<br />feet further to the west, and the new 9 1h and 10' North Mains will be extended approximately 6,900 feet to the
<br />southeast to connect back to the 3` North Mains. Panels 13 -Left through 17 -Left will be developed from the 6'
<br />Main North extension, and the 9 1h and 10 "' North Mains. Development and mining of the WMD will be phased;
<br />with initial development (Phase 1) of sub -mains and head -gate and tailgate entries for Panels 17- and 18 -Right
<br />previously approved under TR07 -63; development of the the 9' and 10' North Mains and remaining head -gate and
<br />tail -gate entries up to the limits of the pending federal coal lease under Phase II (TR08 -64); extension of Panels 17-
<br />and 18 -Right and associated bleeder entries to their western limits under Interim Phase III; and remaining panel
<br />development, mining of the WMD, and construction of required surface facilities under Phase 111, which will be
<br />addressed by a future revision (PR09 -08) 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 />TR09 -68 2.05 -13 07/14/09
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