2015-07-21_REVISION - C1982056 ‎(2)‎

• Permit No: C1982056
• IBM Index Class Name: Revision
• Doc Date: 7/21/2015
• Doc Name: Adequacy Review No. 3
• From: DRMS
• To: Twentymile Coal Company
• Type & Sequence: PR10
• Email Name: JLE
• Email Name: DIH
• Media Type: D
• Archive: No

Twentymile Coal, LLC.
Page 9
July 21, 2015
b. Division's response: Item resolved.
25. Rule 2.05.6(6)(c)(ii) requires that the application shall include an appropriate map, prepared
according to the standards of section 2. 10, showing the location of monuments to be installed and
structures to be monitored within the permit and adjacent area. Revised pages 2.05-191.8 and
191.9 indicate that TC will monitor monuments along RCR33 and the Railroad. The Division
could not locate a map in the permit that depicts the monuments/subsidence reference points used
to monitor subsidence related impacts to these structures. Please submit a map that complies with
the cited rule.
a. TC's response: Revisions and updates to the accompanying Map 23WC include
delineation of those areas where subsidence monitoring points will be established to
monitor subsidence of RCR33, the UP Railroad Spur, and the YVEA Powerline.
b. Division's response: The revised map shows the subsidence monitoring area but does
not show the location of the monuments to be installed. Please revise this map to indicate
where monuments will be installed. Please keep the subsidence monitoring area polygon
on the map.
26. On revised page 2.05-191.8, the applicant indicates subsidence monitoring of RCR 33 and 27 will
be conducted quarterly while active longwall mining is occurring. Please clarify; does TC intend
to monitor both these roads the entire time active longwall mining is occurring in the WCR? Or,
will monitoring be initiated when the longwall operation is within a specific distance to these
structures? If so, please indicate this distance.
a. TC's response: The referenced page and text section have been reviewed and revised to
clarify that, for all monitored structures, monitoring will be initiated when active mining
is within 500 feet of the reference structure. Revised copies of the corresponding pages
accompany these responses for replacement in the PAP.
b. Division's response: This issue is considered resolved. However, revised page 2.05-
191.8 cuts the end off the last bulleted paragraph on this page. The bulleted item in
question begins with "Permittee shall, at its expense, fund... ". The last sentence and a
portion of the second to last sentence is cut off. Please revise this page to include the
missing text.
27. On revised page 2.05-191.9, the applicant indicates subsidence monitoring will be conducted at
the railroad. A trigger has been specified when monitoring will be initiated for this structure, but
a frequency of monitoring (daily, weekly, monthly... etc.) is not specified. Please revise this
section to indicate the frequency the railroad will be monitored.
a. TC's response: The referenced page has been reviewed and revised to clarify that, for
the railroad spur, monitoring will be on a daily basis for any portion of the spur which is
within the affected area while active mining is occurring. Revised copies of the
corresponding pages accompany these responses for replacement in the PAP.
b. Division's response: A new revised page 2.05-191.9 was not included in either copy of
the technical adequacy review response. Please submit an updated page.