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i Drill Hole Lithology Summary <br />Drill Hole Easting Northing Collar Total Depth Tow nship Range Section File <br />DH 106 <br />1,327,027.00 <br />349 005 00 7,642.00 653 00 <br />T4N R94W <br />35 3C <br />Adjusted Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade Color <br />0.00 <br />40.00 <br />40.00 <br />undifferentiated stone <br />40.00 <br />40.00 <br />OXID <br />0.00 <br />undifferentiated stone <br />40.00 <br />67.90 <br />27.90 <br />undifferentiated stone <br />67.90 <br />74.80 <br />X3 <br />6.90 <br />coal <br />74.80 <br />78.00 <br />X4 <br />3.20 <br />coal <br />78.00 <br />117.20 <br />39.20 <br />undifferentiated stone <br />117.20 <br />118.80 <br />Al <br />1.60 <br />coal <br />118.80 <br />141.00 <br />22.20 <br />undifferentiated stone <br />141.00 <br />142.50 <br />A3 <br />1.50 <br />coal <br />142.50 <br />145.00 <br />2.50 <br />undifferentiated stone <br />145.00 <br />146.00 <br />S61 <br />1.00 <br />sandstone <br />146.00 <br />187.20 <br />41.20 <br />undifferentiated stone <br />187.20 <br />190.00 <br />81 <br />2.80 <br />coal <br />190.00 <br />192.50 <br />B2 <br />2.50 <br />coal <br />192.50 <br />195.00 <br />B3 <br />2.50 <br />coal <br />• <br />195.00 <br />210.50 <br />210.50 <br />217.00 <br />SC5 <br />15.50 <br />6.50 <br />undifferentiated stone <br />sandstone <br />217.00 <br />220.30 <br />C3 <br />3.30 <br />coal <br />220.30 <br />236.10 <br />15.80 <br />undifferentiated stone <br />236.10 <br />239.90 <br />C5 <br />3.80 <br />coal <br />239.90 <br />241.20 <br />1.30 <br />undifferentiated stone <br />241.20 <br />242.00 <br />C7 <br />0.80 <br />boney coal <br />242.00 <br />265.20 <br />23.20 <br />undifferentiated stone <br />265.20 <br />267.80 <br />D1 <br />2.60 <br />coal <br />267.80 <br />277.20 <br />D2 <br />9.40 <br />coal <br />277.20 <br />286.00 <br />8.80 <br />undifferentiated stone <br />286.00 <br />300.00 <br />SE2 <br />14.00 <br />sandstone <br />300.00 <br />302.80 <br />2.80 <br />undifferentiated stone <br />302.80 <br />308.90 <br />E2 <br />6.10 <br />coal <br />308.90 <br />317.10 <br />8.20 <br />undifferentiated stone <br />317.10 <br />322.10 <br />F1 <br />5.00 <br />coal <br />322.10 <br />331.00 <br />8.90 <br />undifferentiated stone <br />331.00 <br />341.00 <br />SF3U <br />10.00 <br />sandstone <br />341.00 <br />356.00 <br />15.00 <br />siltstone /sandstone <br />356.00 <br />368.00 <br />SF3M <br />12.00 <br />sandstone <br />368.00 <br />392.00 <br />24.00 <br />undifferentiated stone <br />392.00 <br />403.00 <br />SF3L <br />11.00 <br />sandstone <br />403.00 <br />405.00 <br />SF3L <br />2.00 <br />undifferentiated stone <br />Rio Tinto Energy America - Colowyo Mine <br />Page 948 of 1194 <br />