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Geotechnical Stability Exhibit <br /> Engineering Evaluation of Highwall Design for the South Quarry of the Morrison Quarry <br /> Table 5—Summary of Recent Point Load Testing <br /> Corrected Approx. Statistical <br /> Boring Run Depth Rock PL Strength Compressive Shape UCS <br /> (ft.) Type Index Strength Average <br /> (psi) (psi) (psi) <br /> 148.6 3397 <br /> 624.3 14257 <br /> 224 5106 Axial <br /> 173.1 3938 <br /> 105.5- Talc 680.5 15615 <br /> HDR-002 24,25 115.0 Gneiss 295.8 6817 6149.5 <br /> 45.4 1054 <br /> 363.3 8283 Diametral <br /> 282.9 6455 <br /> 300.5 6839 <br /> 911.8 20771 <br /> 348.9 7967 <br /> 177.8 4072 Axial <br /> 158.1 3650 <br /> 17- 61.4- Grn. 1197.3 27245 <br /> HDR-004 19 71.4 Gneiss 622.8 14154 9724.33 <br /> 90.5 2056 <br /> 741.3 16847 Diametral <br /> 512.9 11656 <br /> 131.8 2995 <br /> Direct shear testing was performed on a total of 14 samples in accordance with ASTM D5607. <br /> Samples were tested using either natural fracture points or saw cuts, and with normal stresses <br /> approximately equivalent to in situ conditions. Refer to Table 6 below for a summary of the test <br /> results. <br /> May 2023 1 14 <br />