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2009-10-08_REPORT - C1981022
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2009-10-08_REPORT - C1981022
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Last modified
8/24/2016 3:56:05 PM
Creation date
10/8/2009 12:12:54 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
REPORT
Doc Date
10/8/2009
Doc Name
2009 Annual Subsidence Report
From
Oxbow Mining, LLC
To
DRMS
Permit Index Doc Type
Subsidence Report
Email Name
MLT
Media Type
D
Archive
No
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Highway 133 in the lower elevations of the permit area for the Sanborn Creek Mine and the <br />Sanborn East Tract. During monthly monitoring the lower elevations were visually inspected for <br />mass movement features, with particular attention focused on the landslides in Coal Gulch and <br />the unnamed drainage between the Sanborn Creek and Coal Gulch drainages, above Springs 7 <br />and 9 respectively. <br />An analysis of the previous results of this monitoring program suggests there was no identified <br />movement in the slide features either naturally or associated with mining activities. <br />Beginning with the year 2002, PR-04 modified and reduced the Sanborn Creek Mine spring and <br />seep sampling program but the subsidence monitoring of the three mass movement areas in the <br />vicinity of the Sanborn Creek Mine continued. Previously, OMLLC employee Mr. Tom Anderson <br />had participated in the conduct of the required inspections. To provide continuity with respect to <br />the specific areas to be inspected and to provide a perspective regarding any perceived <br />changes to any of the mass movement features Mr. Anderson accompanied the undersigned <br />during the 2002 inspections. The 2002 monitoring indicated there were no visible signs of <br />recent mass movement and no additional new mass movement features noted. <br />Elk Creek Mine <br />PR-05 required additional monitoring of areas overlying the Elk Creek Mine (see the PAP <br />discussion found on page 2.05-104) where regularly traveled roads are located below historic <br />landslides in the Bear Creek drainage. The monitoring conducted in 2009 indicated no unusual <br />movement of the slide features. Minor tension cracks remain in sandstone outcrops associated <br />with Panel #1. No additional tension cracks were observed in the surface of the Bear Creek two <br />track ranch road. <br />Background Information <br />During 2002, Mr. Anderson also accompanied the undersigned to a number of areas visible in <br />the permit area located within the Elk Creek, Bear Creek and Hubbard Creek drainages. These <br />drainages are steep, deeply incised and contain a number of pre-existing slides and slump <br />features. No visible signs of recent mass movement was apparent and no new mass movement <br />features were noted during the year 2002 inspections. <br />The 2003 - 2008 inspections indicated similar results. No significant indication of recent mass <br />movement was apparent and no new mass movement features were noted above the Elk Creek <br />mine. The 2004 inspection noted tension cracks in sandstone outcrops and two track ranch <br />road. See the 2004 report for details. <br />Please contact me at 970-929-5806 if you have any questions concerning the OMLLC annual <br />subsidence monitoring program. <br />Sincerely, <br />J mes A. Kiger <br />.Environmental Manager <br />Xc: Jim Cooper (OMLLC) <br />Files <br /> <br />0 Page 2
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