REP30054

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 9/15/1994
• Doc Name: SUBSIDENCE REPORT ANNUAL WEST ELK MINE PN C-80-007
• From: DMG
• To: MOUNTAIN COAL CO
• Permit Index Doc Type: SUBSIDENCE REPORT
• Media Type: D
• Archive: No

iiiiiiiiiiiiiiu1ii
999
STATE

OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Nawral Resources
131 3 Sherman 51 . Room 215

Denver, Colorado 80207 I~~~
Phone' 130 31 866-3 567
FAX:[phone]
llEPART
NT
OF
M
E
T
T
7~
~
NL~1T V i~L
RESOURCE
September 15, 1994
Rnr Rnmer

Mr. Henry Barbe

Mountain Coal Company lames 5. Lorhhearl
e.ec Wive Di rec~ni
P.O. BOX 591 MuhaelB Inng
Somerset, CO 81434 °'°~°ionD~eO°r
RE: Subsidence Report (Annual); West Elk Mine; Permit No. C-BO-007
Dear Mr. Barbe;
The Division has reviewed Mountain Coal Company's (MCC) Subsidence
Report for 1993, which is dated June 27, 1994 and includes the
survey completed in October 1993. The requirements for the report
were approved during Minor Revision No. 96.
MCC committed to providing a topographical map to show the location
of the subsidence monuments for the F and B seam. The topography
was not included on the map submitted, which does show the location
of the subsidence monuments and mining to date. An additional map
is not required at this time, but MCC should be aware of this
requirement in the future.
MCC noted subsidence cracks over the F seam 1W15 panel and over the
first, second, and third B-seam panels. Review of Map 26 in the
permit, B Seam Overburden Thickness, shows that overburden in the
first and second panels ranges from 1000 to 1200 feet and in the
third panel, 800-1000 feet.
The maximum total subsidence to date is 8.42 feet at point #41.
This point lies over both the F and B seams. Subsidence to date is
within the maximum predicted of 10.22 feet.
The Division accepts this report as submitted; therefore, this
completes the review of the Annual Subsidence Report. Please call
if you have any questions.
ply,
Christine E. Jq~i~i~ton V ~
Environmental/Protection Specialist CEJ/007SUB.93