REV01772

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 5/9/1997
• Doc Name: TR 79 SECOND RESPONSE WEST ELK MINE PN C-80-007
• From: MOUNTAIN COAL CO
• To: DMG
• Type & Sequence: TR79
• Media Type: D
• Archive: No

C
Technical Revision No. 79 (Second Response)
May S, 1997
Page 3
MCC will maintain the stability monuments for as long as any cut slopes during Phase 1 are
open, and will report these observations in the quarterly reports.
As required by Rules 4.10.2(2)(a) and 4.09.1(11), MCC will submit quarterly reports to the
Division, as is currently done with the Lower Refuse Pile, which will include a description of
the appearance of any instability, structural weakness, and other hazardous conditions
observed during the inspection. The inspections will be done by a registered professional
engineer or other qualified specialist experienced in construction of earth and rockfill
embankments under the direction of a qualified professional engineer. The reports will also
be completed during the critical construction periods, which include: removal of all organic
material and topsoil, placement of underdrainage systems, installation of surface drainage
systems, placement and compaction of fill materials and revegetation.
33. The ditch design table in Appendix L has been revised to include the design specifications
for the interim clear water ditch in Phase 3.
Reclamation Plan (2.05.4)
38. Topsoil that is relocated from the Lower Kefuse Pile to the North Soil Storage area will be
utilized for reclamation of the Lower Refuse Pile.
40. MCC provided the data from the 1993 and 1995 Lower Refuse Pile vegetation reports in
MCC's previous response. As the Division requested the reports in their entirety during our
meeting on April 15, they are now enclosed.
As indicated in previous telephone conversations, MCC will provide the materials originally
submitted and considered by the Division in Technical Revision No. 53, for a soil cover
variance at the Lower Refuse Pile (and approved in 1987), as the Division cannot locate this
information in their files.
Mitigation of the Impacts of Mining Operations (2.05.6)
44. See the response to question 2.
45. a. New Figures 2.1 and 2.2 have been included which show details of the NSS pond,
including cross-sections.
b. A detailed drawing of the spillway, which includes cross-sections is provided on new
Figure 2.2.
c. A detailed plan view drawing of the NSS pond is provided on new Figure 2.1.
d. Figure 2.0 has been revised to include ditch labels.
e. Map 53 and 54 have revised to include the NSS pond.