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<br /> <br /> <br /> <br /> Ind <br /> <br /> <br /> <br /> <br /> <br /> <br /> 5 <br /> <br /> <br /> <br /> <br /> <br /> 10 <br /> <br /> <br /> <br /> <br /> <br /> 15 <br /> <br /> <br /> <br /> <br /> <br /> 0 <br /> <br /> <br /> 25 <br /> 30 <br /> <br /> <br /> <br /> <br /> LOG OF SUBSURFACE EXPLORATION <br /> RSN POND 12 <br /> Roadside North Portal Csmeo Colorado <br /> -''~- Western Associated Coal Corp. Date <br /> }`~~' LINCOLN - DeVORE <br />Inc. 5-22-97 <br /> , <br />~ <br /> `~`` Geotechnical Consultants <br />-= ~= Job No. Drawn <br /> Grand Junction, Colorado 86014-J EMM <br /> <br /> <br />SOR BORING No. 1 <br />NORTN END OF PROPOSED EMBANKMENT, RSN POND 12 <br />BORING ELEVATKIN: <br />GLOW <br />COUNT <br />SOIL <br />DENSITY <br /> <br />WATER <br />Loo DESCRIPTION Inch % <br />~ ~. <br />i~ <br />ALLUVIAL <br />VERY SILTY and CLAYEY SAND <br />~ , <br /> LOW SULFATES <br />~ ~ SC SILTY, CLAYEY SAND SI. MOIST ST 97.5 4.9°,6 <br />~ <br /> I STRATIFIED LOW TO MEDIUM DENSITY 5 <br />e Oec. GRAVELS EASY TO DRILL <br />i <br />i <br /> GRAVELS OF SANDSTONE DEBRIS <br />- LARGE SANDSTONE FRAGMENT DRY CS 50/5 101.9 2.1 °.6 <br />- - VERY HARD Approx. 2 FEET THICK 10 <br />~ ~ ; COARSE SANDS AND GRAVELS <br />I EASY TO DRILL SI. MOIST <br />b I I I SM FRAGMENTS OF SANDSTONE, MUDSTONE AND SHALE <br /> <br />1 ~ I h COMPRESSIBLE MANY SAND SIZES SI. MOIST ST 110.9 4.5°,6 <br />I SM GRAVELLY SAND VERY PERMEABLE 15 21/6 <br /> <br /> III MEDIUM DENSITY SI. MOIST SPT 45/12 4.2°,6 <br /> SOME LOW DENSITY STRATA 64/18 <br /> ALLUVIAL DEBRIS APPARENTLY DERIVED FROM <br /> THE NEARBY SLOPES. <br /> THIS MATERIAL IS NOT NQRMAL ALLUVIUM 20 <br /> DERIVED FROM THE COLORADO RNER. <br /> TD~15' <br /> 25 <br /> 30 <br /> Blow Counts are cumula5ve fo; each - <br /> 6 inches of sampler penetration. <br /> NO Free Water <br /> Durin Drillin 5-5.97 <br />