2015-06-30_REVISION - C1981035

• Permit No: C1981035
• IBM Index Class Name: Revision
• Doc Date: 6/30/2015
• Doc Name: Adequacy Review #2 Response
• From: GCC Energy
• To: DRMS
• Type & Sequence: TR20
• Media Type: D
• Archive: No

King Coal Mine (C-1981-035) TR -20 Adequacy Review 2 Response
A new report dated June 29, 2015 has been prepared by Trautner Geotech, LLC to
replace the September 30, 2014 report. Section 2.05.4, page 4 has been revised to
reflect this change.
d) (New) The second paragraph says, the final slope grade of the West Waste Bank will not "exceed 2:1 unless
specifically designed..." Please replace the "2:1" with "2.5:1" and add "and approved by the Division" to the end of
the sentence.
Section 2.05.4, page 4 has been revised to reflect these changes.
2. Subsection: "Waste Pile Reclamation"
b) Please revise this subsection to include reclamation details, including proposed thickness of cover material /
fill for the proposed West Waste Bank (see previous item).
The text was revised as requested, and directs the reader to the Trautner study, although the wrong date is
given. Please change July 29, 2014 to read September 30, 2014.
A new report dated June 29, 2015 has been prepared by Trautner Geotech, LLC to
replace the September 30, 2014 report. Section 2.05.4, page 4 has been revised to
reflect this change.
6.0 Reconstruction of Bench and Highwall Mine Waste Bank
In general, the outline proposed for construction of the West Waste Bank is in conformance with the Rules and
permit. We do, however, have a few comments on this section:
a) In 6.2, Trautner recommended that they should be present during the earthmoving phase to evaluate the
uniformity and general consistency of the material as it is moved. Was a representative of Trautner present
during any part of the earthmoving process?
This question does not appear to have been addressed in the 06 -Oct -2014 response. Please expand the Mine
Waste Rock Disposal narrative in Section 2.05.3 of the permit to describe actions taken by GCC as they relate
to the Trautner study (the placement and ultimate removal of the coal mine waste against the portal
highwall, any participation by Trautner, etc.).
Section 2.05.3, page 3, Mine Waste Rock Disposal narrative has been expanded as
requested.
c) Subsection 6.4 addresses the subsurface drainage system proposed for the West Waste Bank. Trautner
evaluated the permeability of the CMW to determine how much water was likely to percolate into and through
the waste bank. Rules 4.09.1(13) and 4.10.3(1) are pertinent to this waste bank project. Subdrains should
need to be constructed only to intercept water from springs or seeps and prevent it from saturating the pile.
Please note that in 4.10.3(1)(c), the subdrainage system is to be covered to protect against entrance of surface
water or leachate. Typically this is accomplished by placing an impermeable membrane on top of the
subdrainage installation.
6.4 of Trautner has been revised to address the requirements for subdrains. This portion of the comment is
resolved. However, the permit does not appear to address the Inspection requirements. Please revise the
Mine Waste Rock Disposal narrative in Section 2.05.3 of the permit to address inspection elements and
frequency for the West Waste Bank, in accordance with Rules 4.09.1(11) and 4.10.2.
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