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P. 02 <br />':. ~ :. <br />fys: r~EOTEGI-~NICAL 6 GEpSC~ENCE SEAVICE9 <br />October l4, 1996 <br />Harding Lawson Associates <br />155 South 300 West, Suite 103 <br />Salt Lake City, UT 84101 <br />Attn: Loren Jalbert <br />Re: Results of Unconfined Compression and Direct Shear Testing for Future West Elk Gob Pile <br />Dear Loren: <br /> <br />The bedrock formation throughout is the Mesaverde, which includes sandstones, siltstones, coal, <br />and shale layers. The sedimentary rock units were observed by you to dip about 5= toward the <br />highway, and the two bench areas of shallow slope could be dip slopes, although the lower bench <br />is apparently covered by 50' or more of river alluvium. <br />7blephone::E0' 1255.5222, Fex: (BO'I 1255-572'1 <br />Four samples of discontinuities fiom your exploratory hole beneath the proposed «'est Elk gob <br />pile have been tested in direct shear, and three samples of intact rock have been tested in <br />unconfined compression. The approximate location of the hole from which the samples were <br />taken is schematically illustrated here: <br />