2020-03-24_PERMIT FILE - C1981019A ‎(39)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/24/2020
• Type & Sequence: TR135
• Section_Exhibit Name: 2.05 Operations and Reclamation Plans
• Media Type: D
• Archive: Yes

RULE 2 PERMITS
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Acid-Forming and Toxic-Forming Materials
No significant acid-forming materials exist within the overburden soil or coal seams to be mined.
Therefore,Colowyo will not undertake special handling procedures as described in Section 2:05.3.
A detailed description of the chemical characteristics of soils and overburden materials is presented
under Sections 2.04.6 and 2.04.9.
For a detailed description of the special handling of spoil material and sampling programs, refer
to the Production Methods and Equipment Segment of this section.
Flammable liquids, such as oil and fuel,will be protected from spilling into other areas by earthen,
concrete or HDPE lined structures surrounding each storage facility. A spill containment control
plan has been developed to protect against spills.
All major equipment on the mine site will be equipped with portable fire extinguishers or automatic
fire suppression systems. The water truck used for dust suppression at the mine site could also be
used to control most fires.
Sealing of Exploration and Mine Holes
Exploration and mine holes which remain open for use as a water supply well or for use as a
groundwater monitoring well will be completed with casing or piezometers at sufficient height
above the land surface to prevent drainage of surface water or entrance of foreign material into the
well, and will be fitted with caps to prevent the introduction of objects other than monitoring and
sampling equipment. When the groundwater monitoring wells are no longer needed or required
for any purpose,each well will be eliminated by plugging with concrete to the surface and removal
of the associated surface structure.
Plugging procedures utilized for exploration drill holes that will not be mined through during the
current Permit term are as follows:
1. Drill holes drilled deeper than the stripping limit (450-500 feet) will be plugged by
pumping cement or heavy solids bentonite Plug Gel or chips through the drill stem from
the bottom up to within 3 feet of the ground surface.
2. Drill holes shallower than stripping limits (450-500 feet) may be plugged with the ready-
mix concrete method instead the method in#1 to within 3 feet of the ground surface.
3. Drill holes with no water or coal zones may be plugged by backfilling with cuttings, and
placing a plug ten feet below the ground surface to support a cement plug or bentonite
chips to within 3 feet of the ground surface.
For safety considerations, exploration drill holes that will eventually be mined through during the
present Permit term need only be covered with wood, plastic or other such material or otherwise
bermed to prevent access.
Those holes completed in aquifers will be sealed entirely with cement or other suitable sealant to
within 3 feet of the ground surface.
Rule 2 Permits 2.05-36 Revision Date: 12/20/19
Revision No.: TR-135