2010-12-17_REVISION - C1981019 ‎(130)‎

• Permit No: C1981019
• IBM Index Class Name: Revision
• Doc Date: 12/17/2010
• Doc Name: Exhibit 6 Item 7 Geology Pre-Feasibility Part 2
• Type & Sequence: PR3
• Media Type: D
• Archive: No

Coal Quality Data Review for Colowyo Coal Company
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Table of Contents
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1.0 Introduction ................................................... ............................... 3
1.1 Introduction ................................................. ..............................3
1.2 Conclusions and Recommendations .................. ..............................3
2.0 Base Data ...................................................... ..............................4
2.1 Discussion of Base Coal Quality Data ................ ..............................5
3.0 Coal Quality Data Analyses ................................ ..............................6
3.1 Review Proximate Analyses ............................... ..............................7
3.2 Ash versus Btu /Ib Analysis .............................. ..............................7
3.2.1 Cross -plots and Regression Analysis .............. ..............................7
3.2.2 Ash and Btu /Ib Variance ........................... ............................... 10
July 2004
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