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<br />Mountain Coal Company -West Elk Mine <br />Sylvester Gulch Road Geotechnical Irnestigation <br />Seismic Refracion Survey <br />Summary of Operations <br />Fgme 29. Correlation between seismic refraction profile and borehole logging at Station 48+00. Crreen line <br />indicates surface. Red line indicates the acaur6c impedance boundary. <br />48+00 <br />C <br />i3rown, some <br />SILT (ML) <br />Brown, some fine sond and fine angular grovel, <br />trace cloy, slightly piostic to non-plastic, <br />stiff, moist. <br />Light brown, some fine onqular grovel, trace <br />doy and sond, non-plastic, very stiff, moist <br />to dry. <br />• <br />• <br />SILTY CLAY (CL) Possibly WEATHERED CLAY570NE <br />Brown to dork gray, some fine grovel, stiff to <br />very stiff, plastic, moist. <br />UMS, Inc. <br />Page 19 <br />05/17/03 <br />