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Barr Engineering Company <br />4700 West 77th Street <br />BARR Minneapolis, MN 55435 -4803 LOG OF BORING B -3 <br />Sheet 4 of 4 <br />Project: Proposed RPE E )pansion <br />Location: West Elk Mine, Somerset, <br />client: Mountain Coal Company <br />CO <br />Barr Project Number: 06/261003 <br />STANDARD PENETRATION <br />NATURAL DRY <br />TEST DATA <br />DENSITY <br />w <br />o <br />(\ <br />N in blows /ft <br />(pcf is <br />MATERIAL DESCRIPTION <br />a <br />> 0 <br />10 20 30 40 <br />105 115 125 <br />c <br />(ASTM D2488) <br />SHEAR STRENGTH, ksf <br />Water Content, % <br />w <br />O <br />E <br />(n <br />Qp X UC A TV )K <br />Wp WN W, <br />� <br />VS A VSR O <br />1 2 3 4 <br />20 40 60 <br />90 <br />SANDSTONE Dark brown- black, some light grey /grey sandstone 90.0 <br />with shale and coal seams. <br />6275 <br />81% <br />95 <br />6270 <br />:: <br />74% <br />100 <br />100.0 <br />105 <br />110 <br />115 <br />120 <br />Completion Depth 100.0 <br />Remarks: <br />Date Boring Started: 6/18/09 <br />Date Boring Completed: 6/19/09 <br />SAMPLE TYPES <br />WATER LEVELS <br />Logged By BSE <br />m Auger Cutting ,Shelby Tube <br />While Drilling: <br />Drilling Contractor: Haztech <br />Drilling Method: HSA/CORE <br />End of Drilling: <br />Northing- 402650.2 <br />n <br />Eastin : 1450672.6 <br />Split Spoon Rock Core <br />hrs After Drilling: 75.28 <br />the stratification lines represent approbmate boundaries. The transition may be gradual. <br />