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EASTERN MINING DISTRICT
<br /> The EMD added approximately 7,690 acres to the permit area, and approximately 2,630 acres to the affected
<br /> • area acreage. The additional acreage (beyond the affected area) was added to square up the Permit Area and
<br /> accommodate future panels to the north of the EMD. The mining schedule for the EMD and other current and
<br /> future reserve areas is provided on Map 23, Mine Plan. The existing portals and main entries (1S` and 2 North
<br /> Mains) were used to access the EMD. An additional eastern portal was developed to facilitate mining in this
<br /> district by breaking the existing No. 2 Entry out to the surface, in parallel with the existing mine portals.
<br /> During the initial five -year permit term (1993 — 1998), mining continued in the SWMD and extended into
<br /> Gateroads 5 -Right to 10- Right, the associated sub -main, the North Mains, and Longwall Panels 7 -Right through
<br /> 9- Right. The remaining five -year blocks are shown on Map 23. Surface ownership for the Eastern and
<br /> Northern Mining Districts is shown on Map 1, Surface Ownership, which shows the location of parcels
<br /> overlying the mine workings owned by various companies, individuals, or governmental entities.
<br /> The gateroads in the EMD consist of three entries, typically driven on 100 -foot centers, although the location of
<br /> the entry may vary depending upon ground control requirements as reflected in pillar widths between the
<br /> entries. Including the three 20 -foot wide entries and 35 to 155 foot wide pillars, the gateroads are approximately
<br /> 230 feet in width. Cross -cuts were developed on both 100 and 200 foot centers along the length of the entry,
<br /> except in the vicinity of the start and stop rooms, where cross -cut spacing is reduced. The sub -mains have up to
<br /> six entries, driven on 100 -foot centers. As previously stated, the sub -mains driven off the north mains were
<br /> constructed with up to seven entries, plus a sump. Once the sub -mains were driven to the southeast, up to six
<br /> entries were established. The longwall panels in the EMD have an 850 -foot face and vary in length from
<br /> approximately 10,000 feet to 17,000 feet. Panels 7- Right, 8- Right, and 9 -Right exceed 16,000 feet, and the
<br /> remainder of the panels are approximately 16,000 feet or less. The mine layout is shown on Map 23, Mine Plan.
<br /> As shown on Map 23, 10 -Right and 9 -Right are the northernmost gateroad and panel, respectively. The
<br /> • gateroads and panels in the EMD were mined in a southerly direction, allowing for gravity drainage away from
<br /> the active panels. Mining of Panels 8 -Right and 9- Right, in the initial five -year permit term, resulted in
<br /> undermining of Routt County Road 33, powerlines, telephone- lines, Foidel and Middle Creeks, and the Union
<br /> Pacific railroad spur servicing the mine. Undermining of the noted structures /features is discussed in more
<br /> detail under Rule 2.05.6(6). During subsequent five -year permit terms, mining will occur beneath privately -
<br /> owned structures, and Foidel and Fish Creeks, as shown on Map 23B, Structures and Renewable Resource.
<br /> EMD (Panels 2 - Right through 6 Right) (PR97 - 04)
<br /> The mining for the remainder of the EMD included areas previously discussed in Permit Revision PR93 -03.
<br /> The area mined in this five -year permit term are shown and designated by color- coding on Map 23, Mine Plan.
<br /> The mining layout, i.e. panel widths, gateroad dimensions, and cross -cuts, is essentially the same as described in
<br /> the PR93 -03 submittal, except that dimensions may vary based upon mining conditions encountered in the new
<br /> area, and sumps and ventilation dog legs were established as and where needed. Also, the barrier width or
<br /> location between entries in the northeast may vary based upon mining or geologic constraints.
<br /> During the five -year term, longwall mining was conducted under Routt County Road 33, powerlines, Foidel,
<br /> and Middle Creeks, the Union Pacific Railroad (Energy Spur), and private residences, owned by the Ashley
<br /> family. A more detailed discussion of provisions for undermining these structures is presented under Rule
<br /> 2.05.6(6).
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<br /> PR09 -08 2.05 -15 04/29/09
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