2013-10-08_REVISION - C1982056 ‎(22)‎

• Permit No: C1982056
• IBM Index Class Name: Revision
• Doc Date: 10/8/2013
• Doc Name: Proposed Decision and Findings of Compliance
• From: DRMS
• To: Twentymile Coal, LLC
• Type & Sequence: RN6
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

IV. Topsoil – Rule 4.06

Replaced soils that were stockpiled will be chisel plowed in addition to contour
furrowed. These soils will be drill seeded as soon as practicable following topsoil
replacement. Stockpiled topsoil not utilized at Energy Mine No. 3 has been
transferred to the Foidel Creek permit for distribution at the Fish Creek Tipple.

An alternative treatment to eliminate slippage surfaces, relieve compaction, and
provide for root penetration is approved. This treatment will consist of chisel plowing
(4.06.4(1)). Surface disturbance is proposed with this Permit Renewal at the RDA
Expansion Area Phase II. However, no new topsoil stockpile will be created with
approval of this permit renewal due to the direct haul of topsoil to the Phase I areas of
the RDA Expansion Area.

V. Sealing of Drilled Holes and Underground Openings – Rule 4.07

The Division will require that each hole, well or other underground opening be
capped, sealed, backfilled, or otherwise properly managed (4.07.3).

VI. Use of Explosives – Rule 4.08

The explosives area at the Foidel Creek Mine was transferred from Mine No. 1, Mine
No. 2, and Eckman Park Mine, Permit No. C-81-071. Surface blasting is limited to 5
pounds of explosives. No specific approvals are granted to the applicant under this
section.

VII. Disposal of Excess Spoil – Rule 4.09

No specific approvals are granted to the applicant under this section

VIII. Coal Mine Waste Banks – Rule 4.10

Technical Revision No. 21 (TR-21) approved a coal waste pile south of Pond D at the
main facility area of the Foidel Creek mine. The coal waste pile configuration is a
side-hill design with a maximum estimated volume of 3 million cubic yards of coal
mine waste. The source of the waste is two wash plants which process any low quality
coal product produced by mining, or low quality coal not processed. The Division
approves the design and any alternative specifications as represented in Exhibit 26A of
the PAP (4.10.1(1)).

An expansion to the coal mine waste pile was approved with Technical Revision No.
67 (TR-67). The waste pile expansion provides for approximately 20.0 million cubic
yards of additional refuse placement capacity of the waste pile. The following
stipulation was attached with TR-67 and is complied with as a result of this Permit
Renewal (RN-06):

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Foidel Creek MineOctober 8, 2013