REP52428

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 7/31/1995
• Doc Name: OCT 94 SUBSIDENCE MONITORING REPORT WEST ELK COAL MINE PN C-80-007
• From: DMG
• To: CHRISTINE JOHNSTON
• Annual Report Year: 1994
• Permit Index Doc Type: SUBSIDENCE REPORT
• Media Type: D
• Archive: No

III IIIIIIIIIIIIIIII
999
1995
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman 51., Room 215
Denver, Colorado 80207
Phone: [phone]
FAX: [phone]
DATE: July 31,
STATE OF COLORADO
~~
II~~~
DEPARTMENT OF
NATURAL
RESOURCES
Roy Romer
Governor
TO: Christine Johnston lames S. Lochhead
Enecunve Duetlor
FROM: Jim Pendleton ~ MichaelB Long
Division Director
RE: Oct. '94 S _ iden Monitoring Report
West Elk Co ine (Permit #C-80-007)
I have reviewed the semi-annual subsidence monitoring data report
for the West Elk mine, which you forwarded to my attention. This
data report presents the survey data, maps and subsidence cross-
sections for the October, 1994 survey.
The report presents a clear rendition of the voluminous subsidence
monitoring data for the West Elk mine. The presentation is
straightforward and comprehensive.
To date the maximum observed subsidence is 8.55 feet. This
vertical displacement was observed in a location overlying multiple
seam mining within both the F and B Seams. This observed
subsidence compares conservatively with the maximum projected
multiple seam subsidence of 10.22 feet.
I recommend that you accepot the semi-annual subsidence monitoring
data report for October 1994, as submitted.
My only concern is that Mountain Coal required five months after
completion of the actual survey to submit the data. I would hope
that future reports could be produced within a couple of months.
cc: David Berry
Doc: M:\MIN\JAP\MTGSUB.REP