2010-06-04_PERMIT FILE - C1982056A ‎(9)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 6/4/2010
• Doc Name: Pages 2.05-1 to 2.05-64
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

• Installation of drainage and sediment control structures (includes sedimentation pond)
• Construction of a light -use road and site preparation for shaft pad
• Construction of the shaft pad and lined cuttings pit
40 • Drilling and casing of an exploration borehole to verify geologic and groundwater conditions
• Substation construction and installation of electrical distribution line and equipment
• Grouting operations (as necessary) and drilling of shaft pilot holes
• Excavation and construction of shaft collar structures
• Blind- drilling and casing of two shafts
• Installation of mine ventilation fan, fan shroud, silencer, equipment building, and associated equipment and
controls on ventilation exhaust shaft
• Installation of shaft heater and associated ancillary equipment on ventilation intake shaft
• Erection of escape hoist building and installation of equipment and controls on ventilation intake shaft
• Construction of security fence around shafts
• Extension of entries from the 18 -Left longwall panel to connect to the shaft bottom
• Conversion of the exploration borehole to a Mine Atmosphere Control borehole, and installation of
modular methane drainage and/or nitrogen injection systems
• Boring and casing of a mine dewatering borehole and installation of a pumping system and controls
• Installation of a mine water transfer pipeline, associated valving, and access manholes
• Final clean -up and dressing of roads and site pad
Site - specific investigations required for design and permitting of the new ventilation shaft and pipeline will, or have
included a cultural resource survey of potential disturbance areas, soil and foundation characterization as the basis
for shaft pad and access road design, vegetation community mapping, and verification of TES compliance. The
cultural resource survey was conducted by Metcalf Archaeological Consultants, the engineering soils
characterization by Northwest Colorado Consultants, and the soils /vegetation investigations by Habitat
Management. The perimeter of all areas affected by surface facilities construction will be clearly marked before
• the beginning of surface disturbances. The proposed shaft pad and cuttings pit will have maximum dimensions of
approximately 425 x 500 feet (4.5 acres) with cut and fill slopes, and the substation area will be approximately 80 x
125 feet. The substation and powerline disturbance, light -use road, and soil stockpile area will add approximately
1.1 acres of disturbance, for a total disturbed area of approximately 5.6 acres. The light -use road disturbance
corridor will be approximately 420 feet long and 40 feet wide (0.3 acres of disturbance). Actual constructed road
width (finished top width) is expected to be approximately 24 feet. Refer to Exhibit 25Y, 18LT Ventilation Shaft
Installation — Foundation and Road Investigations, Map 24 (Sheet 4 of 4), and Exhibit 49R, 18LT Ventilation Shaft
Installation — Design Drawings, for details on the road, and the road profile and cross - section. The proposed light -
use road crosses upland areas where road construction will involve removal of any large vegetation and stripping
and stockpiling of other vegetation, soil, and organic materials.
As the basis for design and construction of two proposed mine ventilation shafts and associated ancillary facilities,
TCC conducted geotechnical investigations for the 18 -Left (18LT) Mine Ventilation Shaft Installation. The site
was accessed using a Snow -Cat mounted auger, and the geotechnical investigations involved completion of up to
eight 4 -6 inch hollow -stem auger sample holes and collection, examination, and testing of the resulting samples.
Auger test holes were located by the contractor within the areas defined as the 18LT shaft pad and road areas, as
shown on Figure EX49R -Fl, and were advanced to depths of 15 -40 feet. On completion of each sample hole, the
hole was backfilled with drill cuttings and leveled. Given that all sample holes fall within the 18LT shaft facilities
footprint, and shaft facility construction is anticipated within the next six months, further reclamation will not occur
unless shaft facility construction is deferred or cancelled. In those circumstances, drill -sites will be seeded with the
approved rangeland seed mixture during the first scheduled seeding operations follow the decision to defer of
cancel shaft construction, but no later than nine months following completion of sampling activities.
In order to reestablish effective vegetative cover, TCC will recover and stockpile a maximum of 18 inches of soil
• material from shaft disturbance areas. With a total road disturbance area of approximately 0.3 acres, approximately
750 CY of soil material will be salvaged from the road corridor, and approximately 12,800 CY from the 5.3 acre
shaft pad and associated disturbance areas. Prior to initiation of soil salvage operations, temporary sediment
control measures (silt fence, wattles, and/or other, as appropriate) will be installed. Soil salvage volumes are
indicated on Table 49A. Soil material from the road corridor and other disturbance areas will be stockpiled in a
TR09 -70 2.05-45.15 11/16/09