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Colowyo Coal Company, L.P.
<br />Attn.: Mr. Juan Garcia
<br />January 4, 2013
<br />Page 7 of 7
<br />LIST OF REFERENCES
<br />SHANNON 6WILSON, INC.
<br />Colorado Division of Minerals and Geology, 2005 (Revised), Regulations of the Colorado Mined
<br />Land Reclamation Board for Coal Mining, Effective August 30, 1980: Denver, Colorado.
<br />Geoslope International, Ltd., 2007, SLOPE /W, version 7.17, Build 4921: Calgary, Alberta,
<br />Canada, Geoslope International, Ltd.
<br />Shannon & Wilson, Inc., 2006, Geotechnical Study, South Taylor Excess Spoil Fills, Colowyo
<br />Coal Mine: Report prepared by Shannon & Wilson, Inc., Job No. 23 -1- 01105 -200, for Rio
<br />Tinto Energy America (now Colowyo Coal Company, LP), July.
<br />Shannon & Wilson, Inc., 2006a, Geotechnical Study, Feasibility Level, South Taylor Surface
<br />Mine, Colowyo Coal Mine, Moffat County, Colorado: Report prepared by Shannon &
<br />Wilson, Inc., Job No. 23 -1- 01105 -100, for Rio Tinto Energy America (now Colowyo Coal
<br />Company, LP), July.
<br />Shannon & Wilson, Inc., 2010, Revised Addendum 3 to Geotechnical Study for Excess Spoil,
<br />Temporary Spoil Stability, South Taylor Mine Area, Colowyo Mine, Moffat and Rio Blanco
<br />Counties, Colorado: Letter prepared by Shannon & Wilson, Inc., Job No. 23 -1- 01105 -206,
<br />for KCC - Colowyo Coal Company, April 15
<br />23 -1- 01105 -600
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