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Rio Tinto Energy America - Colowyo Mine Page 1115 of 1194 <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type Shade Color <br />0.00 <br />30.00 <br />30.00 <br />undifferentiated stone <br />30.00 <br />30.00 <br />OXID <br />0.00 <br />undifferentiated stone <br />30.00 <br />50.00 <br />20.00 <br />undifferentiated stone <br />50.00 <br />61.00 <br />11.00 <br />sandstone <br />61.00 <br />67.80 <br />6.80 <br />undifferentiated stone <br />67.80 <br />69.50 <br />Y65 <br />1.70 <br />coal <br />69.50 <br />106.00 <br />36.50 <br />undifferentiated stone <br />106.00 <br />108.70 <br />Y55 <br />2.70 <br />coal <br />108.70 <br />115.00 <br />6.30 <br />undifferentiated stone <br />115.00 <br />147.00 <br />SY35 <br />32.00 <br />sandstone <br />147.00 <br />158.80 <br />11.80 <br />undifferentiated stone <br />158.80 <br />160.60 <br />Y35 <br />1.80 <br />coal <br />160.60 <br />171.00 <br />10.40 <br />undifferentiated stone <br />171.00 <br />180.00 <br />SY25 <br />9.00 <br />sandstone <br />180.00 <br />204.50 <br />24.50 <br />undifferentiated stone <br />204.50 <br />207.60 <br />Y25 <br />3.10 <br />coal <br />• <br />207.60 <br />223.00 <br />15.40 <br />undifferentiated stone <br />223.00 <br />229.00 <br />SX3 <br />6.00 <br />sandstone <br />229.00 <br />262.00 <br />33.00 <br />undifferentiated stone <br />262.00 <br />265.00 <br />X3 <br />3.00 <br />coal <br />265.00 <br />272.60 <br />X4 <br />7.60 <br />coal <br />272.60 <br />285.60 <br />13.00 <br />undifferentiated stone <br />285.60 <br />287.10 <br />X5 <br />1.50 <br />coal <br />287.10 <br />357.60 <br />70.50 <br />undifferentiated stone <br />357.60 <br />359.60 <br />B2 <br />2.00 <br />coal <br />359.60 <br />360.70 <br />1.10 <br />undifferentiated stone <br />360.70 <br />362.10 <br />B3 <br />1.40 <br />coal <br />362.10 <br />415.50 <br />53.40 <br />undifferentiated stone <br />415.50 <br />416.50 <br />C3 <br />1.00 <br />coal <br />416.50 <br />421.80 <br />C5 <br />5.30 <br />coal <br />421.80 <br />424.30 <br />C7 <br />2.50 <br />coal <br />424.30 <br />436.00 <br />11.70 <br />undifferentiated stone <br />436.00 <br />438.00 <br />D1 <br />2.00 <br />coal <br />438.00 <br />446.00 <br />D2 <br />8.00 <br />coal <br />446.00 <br />448.00 <br />2.00 <br />undifferentiated stone <br />448.00 <br />457.00 <br />SE2 <br />9.00 <br />sandstone <br />• <br />457.00 <br />460.00 <br />3.00 <br />undifferentiated stone <br />460.00 <br />462.00 <br />E2 <br />2.00 <br />coal <br />Rio Tinto Energy America - Colowyo Mine Page 1115 of 1194 <br />