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Drill Hole Lithology Summary <br />• Drill Hole Easting North Collar Total Depth Township Range Section File <br />D H -106 1,327,027.00 349,005 00 7,642.00 653 00 T4N R94W 35 3C <br />Adjusted Depths <br />From To Seam Thickness Lithologic Qualifiers Lithology Type Shade Color <br />• <br />Rio Tinto Energy America - Colowyo Mine Page 949 of 1194 <br />405.00 <br />417.00 <br />SF3L <br />12.00 <br />sandstone <br />417.00 <br />428.60 <br />11.60 <br />undifferentiated stone <br />428.60 <br />431.50 <br />F3 <br />2.90 <br />coal <br />431.50 <br />432.40 <br />F5 <br />0.90 <br />coal <br />432.40 <br />436.90 <br />F6 <br />4.50 <br />coal <br />436.90 <br />473.50 <br />36.60 <br />undifferentiated stone <br />473.50 <br />475.60 <br />F9 <br />2.10 <br />coal <br />475.60 <br />484.00 <br />8.40 <br />undifferentiated stone <br />484.00 <br />505.00 <br />SFAU <br />21.00 <br />sandstone <br />505.00 <br />511.00 <br />6.00 <br />undifferentiated stone <br />511.00 <br />540.00 <br />SFAL <br />29.00 <br />sandy zone <br />540.00 <br />555.90 <br />15.90 <br />undifferentiated stone <br />555.90 <br />559.00 <br />FA <br />3.10 <br />coal <br />559.00 <br />571.70 <br />FB <br />12.70 <br />coal <br />571.70 <br />573.60 <br />1.90 <br />undifferentiated stone <br />• <br />573.60 <br />580.00 <br />580.00 <br />587.00 <br />G7 <br />G8 <br />6.40 <br />7.00 <br />coal <br />coal <br />587.00 <br />589.00 <br />G9 <br />2.00 <br />coal <br />589.00 <br />594.40 <br />5.40 <br />undifferentiated stone <br />594.40 <br />598.20 <br />GA <br />3.80 <br />coal <br />598.20 <br />602.80 <br />4.60 <br />undifferentiated stone <br />602.80 <br />611.00 <br />GB <br />8.20 <br />coal <br />611.00 <br />623.50 <br />12.50 <br />undifferentiated stone <br />623.50 <br />627.00 <br />GC <br />3.50 <br />coal <br />627.00 <br />637.30 <br />10.30 <br />undifferentiated stone <br />637.30 <br />638.80 <br />HO <br />1.50 <br />coal <br />638.80 <br />653.00 <br />14.20 <br />undifferentiated stone <br />• <br />Rio Tinto Energy America - Colowyo Mine Page 949 of 1194 <br />