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Sample Origin Gob Pile, West Valley, West Elk Mine <br />Material Description Coal Waste <br />Soil Type SM <br />130 <br />120 <br />110 <br />100 <br />U <br />.n <br />f- 90 <br />Z <br />w <br />7 <br />TEST RESULTS <br />MAXIMUM DENSITY: 85.9 <br />OPTIMUM MOISTURE: 12.5% <br />ROCK CORRECTION: <br />MAXIMUM DENSITY: <br />L OPTIMUM MOISTURE: <br /> <br />TEST METHOD: ASTM D-898 A <br />PREP. METHOD: MOIST <br />HAMMER: MANUAL <br />FRACTION USED: 44 <br />MOLD SIZE: 4" diameter <br />Specific Gravity: <br />Liquid Limit: <br />Plastic Limit: <br />Plasiticity Index: NP <br />Test By DRS <br />Test Date 10-07-08 <br />Sample # 1 <br />Sieve Percent <br />Size Passina <br />5" <br />4" <br />3" <br />2" <br />1 '/2" <br />1" <br />3/4" <br />112" <br />318" <br />4 100 <br />10 85 <br />20 71 <br />40 61 <br />100 45 <br />200 36 <br />0.02 <br />0.005 <br />Zero Air Voids Curves <br /> Gs 1.90 , <br /> Gs 1.80 <br />MOISTURE - % of DRY WEIGHT <br />> GRAND JUNCTION <br />Ef%. LINCOLN - DeVORE, Inc. <br />Geotechnical Consultants <br />Grand Junction, Colorado <br />West Elk Mine <br />Somerset. Colorado <br />Oxbow Mining, Inc. <br />Somerset, Colorado <br />Job No. Drawn Date <br />93493-GJ EMM 110-08-2008