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0 SHANNON 6WIL..SON. INC.
<br />Job No. 28,233, for Kennecott Energy, Colowyo Coal Company, LP, Meeker, Colo.,
<br />November 6.
<br />CTL /Thompson, Inc., 2003a, Geotechnical investigation, South Taylor excess spoil fill, Colowyo
<br />Coal Company, Moffat County, Colorado: Report prepared by CTL /Thompson, Inc., Job
<br />No. 35,853, for Kennecott Energy, Colowyo Coal Company, LP, Meeker, Colo., April 9.
<br />CTL /Thompson, Inc., 2003b, Geotechnical evaluation, three alternative surface mine sites,
<br />Colowyo Coal Company, Moffat County, Colorado: Report prepared by CTL /Thompson,
<br />Inc., Job No. 36,163, for Kennecott Energy, Colowyo Coal Company, LP, Meeker, Colo.,
<br />June 9.
<br />CTL /Thompson, Inc., 2005a, Highwall failure, west pit, Colowyo mine: Memorandum prepared
<br />by Mark Gray to Bob Young, KEC /Colowyo, Project No. DN40,195 -130, May 4.
<br />CTL /Thompson, Inc., 2005b, Geotechnical investigation, Lower Wilson surface mine, highwall
<br />mine, and portal, Moffat County, Colorado: Prepared for Kennecott Energy Company,
<br />Colowyo Coal Company, L.P., Project No. DN40,492 -145, September 9.
<br />GEO -SLOPE International, Ltd., 2007, SLOPE/W, version 7.14: Calgary, Alberta, Canada,
<br />GEO -SLOPE International, Ltd.
<br />Greystone Environmental Consultants, Inc., 2003, South Taylor area seeps and springs: Letter to
<br />Colorado Department of Minerals and Geology prepared by Greystone Environmental
<br />Consultants, Inc.
<br />Shannon & Wilson, Inc., 2006a, Geotechnical data report, Collom excess spoil fill area, Colowyo
<br />mine, Moffat County, Colorado: Letter prepared by Shannon & Wilson, Inc., Job No. 23 -1-
<br />01101 -200, for Kennecott Energy, Colowyo Coal Company, LP, April 10.
<br />Shannon & Wilson, Inc., 2006b, Geotechnical report, South Taylor surface mine feasibility level,
<br />Colowyo coal mine: Report prepared by Shannon & Wilson, Inc., Job. No. 23- 1- 01105-
<br />100, July.
<br />Shannon & Wilson, Inc., 2006c, Geotechnical study, South Taylor excess spoil fills, Rio Tinto
<br />Energy America, Colowyo coal mine: Reported prepared by Shannon & Wilson, Inc., Job
<br />No. 23 -1- 01105 -200, July 7.
<br />•
<br />Shannon & Wilson, Inc., 2006d, Addendum no. 1 to geotechnical study for excess spoil, South
<br />Taylor mine area, Colowyo mine, Moffat and Rio Blanco Counties, Colorado: Letter
<br />prepared by Shannon & Wilson, Inc., Job No. 23 -1- 01105 -200, October 26.
<br />23 -1 -01 101- 400- R1.docx/wp /lkn 23 -1- 01101 -400
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<br />Exh. 23 -1 -26 Revision Date: 08/05/09
<br />Revision No.: PR -03
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