2008-10-03_PERMIT FILE - C1982056A ‎(4)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 10/3/2008
• Doc Name: Pages 2.05-1 to 2.05-64
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

infiltration. At the cuttings pit liner interface, quick-set grout will be injected above and below the liner to seal
the liner where it is penetrated by the surface casing. Cover material will be removed from a portion of the
cuttings pit, and borehole cuttings will be transferred to this area to dry, and will then be spread and compacted.
On completion of the borehole(s), the cover material will be replaced and stabilized by seeding with a
• temporary cover. The stockpiled cuttings will be used to backfill the MAC boreholes) during final
reclamation. A methane drainage pipeline and/or nitrogen injection pipeline will be installed within the cased
MAC borehole, and connected to one or more manifolded pipe systems underground which will connect to
sealed gob areas. At the surface, an 8-foot diameter culvert manhole may be installed around the cased MAC
boreholes) as a well-head, with appropriate grounding and lightning protection to meet MSHA requirements.
The fixed pipeline(s) will connect at the surface to a portable skid-mounted methane drainage pump and/or
skid-mounted nitrogen generator. Required power for this installation will be provided by dropline from the
existing powerpole, and the area will be fenced for security. Installation details are shown by the design
drawings in Exhibit 49Q.
6-North Mains Ventilation Shaft (TR05-48, MR06-208, MR06-210, MR06-212, MR07-218)
An additional intake ventilation shaft is necessary to maintain effective ventilation of active mining areas
in the northwest mining district and future west mining district. The new ventilation shaft will be located
in Section 17, TSN, R86W on a ridge northwest of the Northwest Mains Ventilation Shaft and fan, as
shown on Maps 23 and 23B. Site-specific investigations required for design and permitting of the new
ventilation shaft included a cultural resource survey of potential disturbance areas, soil and foundation
characterization as the basis for shaft pad and access road design, and completion of a wetland/AVF survey
for the shaft pad and access road. The cultural resource survey was conducted by Metcalf Archaeological
Consultants, the engineering soils characterization by Northwest Colorado Consultants, and the
soils/wetland/AVF survey by Habitat Management, as described in Section 2.04. Development,
construction, and installation of the intake ventilation shaft (Exhibit 49A, Figures EX49A-F 1 through F4
. and Maps EX49A-M1 through M3, and Exhibits 49E and 49N) involve the following sequential activities:
• Completion of environmental and engineering investigations
• Placement of disturbed area markers
• Marking of wetland buffer zone
• Temporary drainage and sediment control measures
• Recovery and stockpiling of available topsoil
• Installation of drainage and sediment control structures
• Construction of an access road and site preparation for shaft pad
• Drilling and casing of seven (7) boreholes for:
- 3 power boreholes
- 1 water borehole
- 1 air compressor borehole
- 1 rockdust borehole
- lbulk-material drop borehole
• Construction of shaft collar structure and temporary drilling equipment pad
• Conventional blind sink excavation and casing operations
• Driving of additional entries to the south of the existing 6-North Main entries
• Installation of electrical sub-station and extension of power distribution line
• Fabrication ofMillion-Gallon Tank for mine water storage
• Installation of Rock-Dust Tank and Compressor
• Erection of escape hoist/elevator buildings and equipment and installation offence(s)
• • Installation and connection of escape hoist/elevator control equipment and systems
• Final clean-up and dressing of roads and site pads
These activities are briefly described in the following sections.
MR08-229 2.05 - 45.6a 08/01/0