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Rio Tinto Energy America - Colowyo Mine Page 46 of 1194 <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type Shade Color <br />435.00 <br />438.30 <br />E2 <br />3.30 <br />coal <br />438.30 <br />462.20 <br />23.90 <br />undifferentiated stone <br />462.20 <br />465.50 <br />F1 <br />3.30 <br />coal <br />465.50 <br />495.00 <br />29.50 <br />undifferentiated stone <br />495.00 <br />520.00 <br />SF3 <br />25.00 <br />sandstone <br />520.00 <br />520.80 <br />0.80 <br />undifferentiated stone <br />520.80 <br />522.80 <br />F3 <br />2.00 <br />coal <br />522.80 <br />537.00 <br />14.20 <br />undifferentiated stone <br />537.00 <br />538.00 <br />F5 <br />1.00 <br />boney coal <br />538.00 <br />538.50 <br />0.50 <br />undifferentiated stone <br />538.50 <br />540.20 <br />F6 <br />1.70 <br />coal <br />540.20 <br />550.00 <br />9.80 <br />undifferentiated stone <br />550.00 <br />580.00 <br />SFA <br />30.00 <br />sandstone <br />580.00 <br />586.20 <br />6.20 <br />undifferentiated stone <br />586.20 <br />590.00 <br />FA <br />3.80 <br />coal <br />590.00 <br />596.40 <br />FB <br />6.40 <br />coal <br />596.40 <br />597.00 <br />0.60 <br />undifferentiated stone <br />597.00 <br />604.20 <br />G7 <br />7.20 <br />coal <br />604.20 <br />605.00 <br />0.80 <br />undifferentiated stone <br />605.00 <br />606.20 <br />G8 <br />1.20 <br />coal <br />606.20 <br />623.00 <br />16.80 <br />undifferentiated stone <br />623.00 <br />671.00 <br />SGA <br />48.00 <br />sandstone <br />671.00 <br />672.20 <br />1.20 <br />undifferentiated stone <br />672.20 <br />674.00 <br />GA <br />1.80 <br />coal <br />674.00 <br />675.00 <br />1.00 <br />undifferentiated stone <br />675.00 <br />682.10 <br />GB <br />7.10 <br />coal <br />682.10 <br />692.00 <br />9.90 <br />undifferentiated stone <br />692.00 <br />704.00 <br />SGC <br />12.00 <br />sandstone <br />704.00 <br />722.80 <br />18.80 <br />undifferentiated stone <br />722.80 <br />724.80 <br />GC <br />2.00 <br />coal <br />724.80 <br />725.30 <br />0.50 <br />undifferentiated stone <br />725.30 <br />728.00 <br />HO <br />2.70 <br />coal <br />728.00 <br />748.00 <br />20.00 <br />undifferentiated stone <br />748.00 <br />778.00 <br />SH2 <br />30.00 <br />sandstone <br />778.00 <br />785.70 <br />7.70 <br />undifferentiated stone <br />785.70 <br />788.00 <br />H2 <br />2.30 <br />coal <br />788.00 <br />800.00 <br />12.00 <br />undifferentiated stone <br />• <br />800.00 <br />814.00 <br />SH4 <br />14.00 <br />sandstone <br />Rio Tinto Energy America - Colowyo Mine Page 46 of 1194 <br />