2009-04-02_REVISION - C1981010 ‎(5)‎

• Permit No: C1981010
• IBM Index Class Name: REVISION
• Doc Date: 4/2/2009
• Doc Name: Response Letter
• From: Trapper Mining Inc
• To: DRMS
• Type & Sequence: PR6
• Email Name: JDM
• Media Type: D
• Archive: No

raarree MINIM inc.
RECEIVED
March 31, 2009 APR p 2 2009
Mr.-Jason. Musick D;visK h 4: -c mIation,
Environmental Protection Specialist Mining acrd Safety
Colorado Division of Reclamation, Mining and safety
1313 Sherman Street, Room 215
Denver, CO 80203
Re: Trapper Mining Inc., Permit No. C-81-010, Permit Revision No. 6
Dear Mr. Musick:
The following information is submitted as a follow-up to our meeting of March 17`h in Denver
where we discussed preliminary adequacy concerns related to Trapper's K Pit mine plan.
This response includes the following enclosures:
Modified or added text pages 3-15a, 3-15b, 3-39, 3-39a, 3-39b, 3-40, 3-40a and 3-40b
Map M12, Post-Mining Topography, Sheet 3
Horse Gulch Fill Plan View, for inclusion in Appendix T
Horse Gulch Fill Cross Sections, for inclusion in Appendix T
Map M14a, Post-Mining Cross-Sections
As we discussed at our meeting, the post-mining configuration for the Horse Gulch Fill has been
modified to eliminate the saddle that was shown previously. The fill now ties into the adjacent
topography with no saddle. Map M12, sheet 3, Map M14, and the Horse Gulch Fill Plan View
and Cross-Sections have all been modified to incorporate this change.
A more complete description of the mining method used in K Pit is included as a :part of Section
3.1.4.1, Mining Sequence, pages 3-15a and 3-15b. A discussion of safety requirements and
resource recovery is included. It is worth noting that the truck and loader development plan for
this area is critical to the recovery of 8.6 million tons of coal in K Pit and 4.0 million tons of coal
in L Pit.
Permit section 3.5, Backfilling and Grading, pages 3-39, 3-39a and 3-39b have been modified
to include a discussion of post mining topography as it relates to K Pit and the Horse Gulch Fill.
The proposed small variation between pre-mining and post-mining elevations in K Pit is
consistent with previously approved configurations associated with Trapper's successful
reclamation efforts.
Permit Section 3.5.3, Post Mining_Contours, pages 3-40, 340a and 340b, includes a description
of the Horse Gulch Fill and The K Pit Buttress Fill. This text has been updated and moved from
Appendix T to Section 3.5.3.
P.O. Box 187 Craig, Colorado 81626 [phone]