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REP38979
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REP38979
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Entry Properties
Last modified
8/25/2016 12:23:33 AM
Creation date
11/27/2007 8:15:02 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
Report
Doc Date
5/8/2006
Doc Name
2005 Bi-Annual Subsidence Report
From
J.E. Stover & Associates Inc
To
DMG
Permit Index Doc Type
Subsidence Report
Media Type
D
Archive
No
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CRAGG SURVEYING <br />Stephen B. Cragg PLS <br />14762 2900 Road <br />• Hotchkiss, Colorado 81419 <br />Phone 970-872-2258 <br />Fax 970$72-3358 <br />April 10, 2005 <br />Collin Stewart <br />Bowie Resources LLC <br />P.O. Box 1488 <br />Paonia, Co. 81428 <br />Jim Stover <br />J.E. Stover and Associates <br />2768 Compass Drive <br />Grarrd Junction, Colorado 81506 <br />RE: Bowie No. 2 Mine <br />Subsidence Survey <br />Date of Survey -April 07, 2005 <br />A subsidence monitoring survey network has been established by Cragg Surveying for the <br />Bowie Resources, Bowie No. 2 and 3 Mines. The survey is based on the existing survey centre grid in <br />place arourxi the Bowie No. 2 Mine surface facilities. The poirrts for the subsidence survey network have <br />• been established using a Trimble 4800 GPS survey system. This GPS survey has been calitxated to <br />the existing survey control grid and then the survey has been extended to the north to cover the area <br />where the coal has been mined and will be mined in the future. <br />The subsidence survey network was started in May of 1999 with additional pants added in August 1999, <br />November 2000, November 2001, November 2002, and November, 2003. The majority of the <br />subsidence monitorirg pants area # 5 rebar, 24 to 30 inches in length, with a 2 inch aluminum <br />survey cap. The caps are stamped: Cragg Surveying, LS 24944. <br />Subsidence stations up Hubbard Creek were surveyed on April 07, 2005. <br />The falowing tables list the survey points with the coordinate data, northing, Basting and eleva5on for <br />each pam along with a table showing the relative shift in position from the previous survey. <br />Some of the points show small changes in position which may be due to inherent error in the survey, <br />while some of the poirrts show noticeable shift in position resulting from subsidence due to the mining. <br />See the accemparrying map which shows the surface topography, underground mining plan, and the <br />location of the subsidence pants. <br />C~ <br />S1-1 <br />
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