REP03688

• Permit No: C1982056
• IBM Index Class Name: Report
• Doc Date: 3/27/2007
• Doc Name: 2nd Half 2006 Subsidence Report Review Letter
• From: DRMS
• To: Twentymile Coal Company
• Permit Index Doc Type: Subsidence Report
• Media Type: D
• Archive: No

Review of Subsidence Monitoring Report
Mine: Foidel Creek Date this review was completed: March 26, 2007
Permit No.: C-1982-056 CDMG reviewer: Byron G. Walker
Report period: 2"d half 2006
Panel(s) mined during report period: 19 Right, Northern Mining District
This monitoring report covers that period of time where portions of the 19 Right panel were
long-wall mined from approximately Station 130+50 to Station 25+50 in the 19 Right panel,
Northern Mining District [see report, Foidel Creek Mine -Permit No. C-82-056 Second Half
- 2006 Subsidence Report (3/13/2006)[3/13/2007J.
Monitoring requirement
(regulation citation)
Permit requirement In
compliance:
Comment
Yes/no?
Previous subsidence monitoring
PAP, pages 2.05- has demonstrated that
184.10 and 2.05-191.4. subsidence predictions were
2.05.6(6)(c)(i)(A) The requirement of this conservative and provided
Monuments shall be rule has been limited to acceptable descriptions of
installed and surveyed monitoring of selected
Yes expected subsidence in areas for
prior to the structures and which there are no structures. No
commencement of renewable resource monuments were installed
mining lands. See Rule during this period. Previously
2.05.6(6)(c)(i)(C) surveyed monuments were
below. monitored during the report
eriod.
2.05.6(6)(c)(i)(B) pAp page 2.05-184.10.
Monuments shall be The requirement of this
situated to appropriately rule has been limited to
monitor ground surface monitoring of selected
movement, vertical and structures and Monuments were situated
horizontal, within the renewable resource Yes appropriately over areas of this
area proposed to be lands as for the rule report.
undermined, including above. See Rule
an area to accommodate 2 05.6 6 c t C
O( )( )( )
the predicted angle-of- below
draw. .

2.05.6(6)(c)(i)(C) The PAP, pages 2.05-

184.10 and 2.05-191.4
A section of Fish Creek was
orientation, location and ,
and the 2005 Map. monitored as it was within the
elevation of each
Only those structures
Yes estimated angle of draw. Electric
structure within the
within the approved transmission lines were
permit and adjacent
affected area are monitored as they were directly
area shall be monitored.
monitored. over long-wall mined areas.
2.05.6(6)(c)(i)(D)
PAP, page 2.05-185, Monitoring was accomplished at
Monitoring of scheduled by time of Yes least quarterly. Power line
established monuments monuments were monitored
and structures shall be mining progress. dail as undermined, and