2010-04-21_REVISION - C1982056

• Permit No: C1982056
• IBM Index Class Name: REVISION
• Doc Date: 4/21/2010
• Doc Name: Adequacy Responses
• From: Twentymile Coal Company
• To: DRMS
• Type & Sequence: RN5
• Email Name: JHB
• Media Type: D
• Archive: No

volumes) associated with the 6MN Ventilation Shaft Installation only. The total volume currently
shown on Table 49A ialso include the topsoil for the 6MN Mine Water Storage Reservoir. Copies of
the revised PAP materials accompany these responses for insertion/replacement in the PAP.
5) TCC representatives met with the Division on December 1, 2008 regarding the structure of
Peabody Coal Company. Please assure that all owners, officers and director information are
updated in the permit in agreement with officers and director information in the national AVS
database. (Rule 2.03.4).
Response: The relevant ownership and control information was recently reviewed and updated to
reflect Peabody's current corporate structure, and assure consistency with OSMRE's Applicant
Violator System, in conjunction with submittal of MR10-241, reflecting a company name change.
6) Section 2.05, p. 105.1 includes a discussion of reclamation of the NMD site; dismantling of the
surface facilities, removal of powerline, transformers, structure, regrading the pad and road, but
there is no discussion regarding sealing the boreholes. Please direct the Division to where sealing
of the NMD power boreholes is discussed in the PAP, or include a discussion of sealing these
NMD boreholes. (Rule 4.07.3).
Response: A general discussion of measures for plugging and sealing drillholes, and boreholes has
been added to the PAP, beginning on page 2.05-106.2. Copies of revised pages accompany these
responses for insertion/replacement in the PAP.
7) Section 2.05, p. 105.1, in the discussion of the NW-Mains Vent Shaft reclamation, reclamation of
the Thickener Underflow Project is included in the last paragraph (TR-39). This seems an obscure
place to add this description. For the sake of organization, and finding appropriate descriptions
regarding reclamation of facilities, this description would be better placed with description of the
Portal Area reclamation (p. 2.05-99 or 2.05-100). -The current location of the Thickener
Underflow reclamation is incorporated with facilities that are remote from the main facilities area.
Since the Thickener Underflow lines are located at the main facilities, reorganizing the description
would be logical.
Response: In reviewing this comment and the related text, it was noted that there is opportunity to
reformat the entire Reclamation Plan section to group facilities, for clarity. This section has been
reviewed and reformatted to group related facilities together. Copies of the revised PAP materials
accompany these responses for insertion/replacement in the PAP.
8) Page 2.05-106 contains text that discusses the 6-Main North Ventilation Shaft and Facilities. This
page has been revised on 11712008 (MR227, approved 111112008), 21412008 (TR62, approved
21412008), and 81112008 (MR229, approved 812212008). It appears that text approved in MR227
and TR62 was lost from this page with the approval of MR229. Please replace the previously
approved text or if the approved text has been moved to another page, please direct the Division to
its location.
Response: The referenced page revisions have been reviewed, and any missing text has been
incorporated into the reformatted Reclamation Plan section, as referenced in the previous response to
Comment 7. Copies of the revised PAP materials accompany these responses for
insertion/replacement in the PAP.
9) Rangeland seed mix, Table 55 and text on page 2.05-112 discuss seeding techniques to be utilized
for the reclaimed areas. The discussion in the text references studies from the 1970's and older.
While the results of these studies are valid, observation of thirty years or more of reclaimed coal