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[~_ RHODES AND ASSOCIATES, /NC. <br />• _ ~ SOIL AND GEOLOGICAL CONSULTANTS <br />June 02, 1982 <br />?`]r. Ben T. Quinn <br />P.merican Materials, Inc. <br />P. 0. Box 198 <br />Glasgow, Kentucky 42141 <br />Re: Laborator}' Testing <br />Trinidad Basin Mining <br />DelAuga Canyon, Colorado <br />Dear Mr. Quinn: <br />?627 REGENCY R04D <br />LEYIryp TOM, kEryTVCkY X05::5 <br />IeDe) 27!-D~Ep <br />As reyuested, this office performed laboratory soils tests <br />on a.soil sample delivered to our firm by you. The results of <br />this testing are as follows: <br />Soil Description: Clay, Silt and Rock Fragments (shale, <br />sandstone and coal) with a trace of organic material, <br />( • dark gray <br />Gradation Analysis: <br />7, Rock Fragments: 37 <br />7, Silt: 43 <br />% Clay: 20 <br />Atterberg Limits: <br />Liquid Limit (%): 38 <br />Plasticity Index (%): 12 <br />Specific Gravity: 2.60 <br />Standard Proctor Test (ASTM D-698): <br />Maximum Dry Density: 97.7 pcf <br />Optimum Moisture Content: 21.7% <br />Triaxial Compression Tests (consolidated, undrained with pore <br />pressure measurement): <br />Effective Stress Shear Strength (@): 29.3° <br />Effective Cohesion (c): 0 psf <br />~~ <br />~ V-y0 G2.s~ <br />