Laserfiche WebLink
Table 4-3. 2018 Subsurface Explorations: Uniaxial Compressive Strength (UCS) Test Results <br /> Uniaxial <br /> Borehole ID Sample Sample Material Compressive <br /> Number Depth (ft) Strength <br /> (psi) <br /> M-3-18 2 303.7-304.5 Sillimanitic 8,386 <br /> Gneiss <br /> M-3-18 3 337-337.5 Sillimanitic 5,321 <br /> Gneiss <br /> M-2-18 4 264-264.5 Granitic 33,012 <br /> Gneiss <br /> M-2-18 6 43-43.5 Biotite Gneiss 20,314 <br /> M-5-18 8 270-271 Biotite Gneiss 3,601 <br /> M-4-18 9 173-174 Granitic 9,221 <br /> Gneiss <br /> M-5-18 10 305-306 Pegmatite 7,658 <br /> According to the laboratory test results, the average friction angle for the granitic gneiss is <br /> 24.4 degrees and the average apparent cohesion is 46.8 psi. The average friction angle for the <br /> sillimanitic gneiss is also 24.4 degrees, and average apparent cohesion is 63.3 psi for <br /> sillimanitic gneiss. The biotite gneiss has a friction angle of 30.8 degrees and zero cohesion. <br /> 17 <br /> Aggregate Industries—Morrison Quarry GEI Consultants, Inc. <br /> AM-07 Geotechnical Stability Exhibit November 2020 <br />