2013-11-29_REVISION - C1981035

• Permit No: C1981035
• IBM Index Class Name: Revision
• Doc Date: 11/29/2013
• Doc Name: Preliminary Adequacy Review
• From: DRMS
• To: GCC Energy, LLC
• Type & Sequence: TR20
• Email Name: MLT
• Email Name: SB1
• Media Type: D
• Archive: No

Tom Bird, GCC Energy
C- 1981 -03 5 / TR -20 PAR
29- Nov -2013
Page 3 of 12
(5) [See also 4.09.2(7) and 4.10.3(2) & (3)] Slope protection shall be provided to minimize
surface erosion at the site. Diversion design shall conform with the requirements of 4.05.4.
All disturbed areas, including diversion ditches that are not riprapped, shall be vegetated
upon completion of construction.
(11) Inspection [See also 4.10.2]
(a) The fill shall be inspected for stability by a registered engineer or other qualified
professional specialist experienced in construction of earth and rockfill embankments
under the direction of a qualified professional engineer at least quarterly throughout
the construction and during the following critical construction periods: (1) removal of
all organic material and topsoil, (2) placement of underdrainage systems, (3)
installation of surface drainage systems, (4) placement and compaction of fill
materials, and (5) revegetation.
(b) The qualified registered engineer shall provide to the Division a certified report within
2 weeks after each inspection that the fill has been constructed as specified in the
design approved by the Division. The report shall include a description of any appear-
ances of instability, structural weakness, and other hazardous conditions observed
during the inspection. A copy of the report shall be retained at the mine site.
(c) Any certified report addressing the underdrain system and protective filters shall
include color photographs taken during and after construction, but before underdrains
are covered with excess spoil. If the underdrain system is constructed in phases, each
phase shall be certified separately. The color photographs accompanying each
certified report shall be taken in adequate size and number with enough terrain or
other physical features of the site shown to provide a relative scale to the photographs
and to specifically and clearly identify the site.
(12) Coal mine wastes may only be disposed of in excess spoil fills, if such waste is:
(a) Placed in accordance with 4.10.4;
(b) Demonstrated to be non -toxic and non -acid forming; and
(c) Demonstrated to be consistent with the design stability of the fill, in accordance with
2.05.3(6) (b), (c) and (d).
(13) [See also 4.10.3(1) and (5)] If the disposal area contains springs or wet - weather seeps, an
underdrain system consisting of durable non - acid- forming and non - toxic- forming rock shall
be constructed from the wet areas in a manner that prevents infiltration of the water into the
spoil material. The underdrain system shall be protected by an adequate filter and shall be
designed and constructed using standard geotechnical engineering methods.
(14) The foundation and abutments of the fill shall be stable under all conditions of construction
and operation. Sufficient foundation investigation and laboratory testing of foundation
materials shall be performed in order to determine the design requirements for stability of
the foundation. Analyses of foundation conditions shall include the effect of underground
mine workings, if any, upon the stability of the structure.