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2014-09-29_REPORT - C1981010
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2014-09-29_REPORT - C1981010
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Entry Properties
Last modified
8/24/2016 5:48:11 PM
Creation date
9/30/2014 12:54:55 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981010
IBM Index Class Name
Report
Doc Date
9/29/2014
Doc Name
Semi-Annual Geotechnical Monitoring Report - Sept 2014
From
Trapper Mining Inc
To
DRMS
Permit Index Doc Type
Stability Report
Email Name
JLE
DIH
Media Type
D
Archive
No
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TRAPPER MINING INC. <br />September 25, 2014 <br />Mr. Jared Ebert � c,CEIVED <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining, and Safety SEP L'i Z014 <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Dear Mr. Ebert: <br />RE: Semi - annual Geotechnical Monitoring Report — September 2014 <br />Trapper began submitting semi - annual monitoring reports to the Division, beginning March 2008 with the last <br />report completed on March 27, 2014. Trapper has been monitoring the 2006 landslide area for movement <br />through the use of a continuous monitoring system. <br />Section 3.3.3 of Trapper's permit details the initial configuration of the monitoring system. Currently, there are <br />three sites (site 8, site 9 and site 10) that are monitoring the area. A map has been attached showing the <br />location of these sites. Due to the advancement of mining, the GPS site 7 was decommissioned on May 20, <br />2014 and GPS site 9 was installed on the same date. By June 3, 2014 site 9 was configured and collecting <br />accurate data. A third GPS site (site 10) was commissioned on August 28, 2014. <br />Displacement graphs for all four sites covering the time period of March 27, 2014 through September 25, 2014 <br />are attached. The monitoring system was upgraded on May 5, 2014. There are two sets of GPS movement <br />graphs for site 7 and 8. The first set covers the time period prior to the upgrade (March 27, 2014 thru May 5, <br />2014). There are a few spikes in these graphs. The system has a filter that is supposed to remove these <br />spikes but some corrupted data still passed through. The second set of graphs covers the time period after the <br />upgrade (May 5, 2014 thru September 25, 2014). There is still some corrupted data that managed to pass <br />through a filter and can be seen on these graphs as spikes. GPS site 9 shows a jump in the data around August <br />28, 2014. There was an overburden shot to the K seam in L pit cut 3 during this time which probably <br />contributed to the jump in the data. We will continue to monitor this area for any additional movement. Site 8 <br />and site 10 have shown minimal amount of movement. <br />An inclinometer graph for site 8 has been attached. This graph has shown minimal amount of movement. <br />Please contact me if you have any questions. <br />Sincerely, <br />Tonia Perkins, P. E. <br />Senior Mining Engineer <br />P.O. Box 187 Craig, Colorado 81626 (970) 824 -4401 <br />
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