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The input parameters are summarized in Table 5-3. The RQD values selected for the Q- <br /> system inputs are based on an evaluation of measurements obtained from drill logs advanced <br /> in the South Quarry, which showed an average value of 50%. Figure 5-3 shows the <br /> distribution of RQD measurements. <br /> Morrison Quarry <br /> Rock Quality Designation (RQD) Measurements from the South <br /> Quarry <br /> 120 <br /> 100 <br /> s0 <br /> 'u <br /> z <br /> 60 <br /> 40 <br /> 20 <br /> 0 - <br /> 7 100 <br /> RQD <br /> Figure 5-3. Histogram showing the distribution of RQD measurements as measured in rock <br /> cores from the South Quarry. <br /> Table 5-3. Input Parameters for Q-system Rock Mass Characterization. <br /> Input Value <br /> Parameter Lower Upper Basis <br /> Bound Q- Bound Q- <br /> value value <br /> RQD 40 50 Avg. and weighted avg. value of 277 RQD measurements <br /> from collected rock cores <br /> J, 12 9 Range of Jn values represents 3 joints (Jn=9) and 3 joints plus <br /> a random joint (Jn=12) <br /> Jr 2 3 Values selected based on condition of joint surface (rough, <br /> undulating to smooth, undulating) <br /> Ja 2 1 Values selected based on condition of joint infillings, which are <br /> generally not present. Most joints only have surface staining. <br /> Jw 1 1 Dry excavation <br /> SRF 2 1 Values selected assume low to medium stress to near surface <br /> conditions <br /> Q-Value 1.7 16.7 <br /> 22 <br /> Aggregate Industries—Morrison Quarry GEI Consultants, Inc. <br /> AM-07 Geotechnical Stability Exhibit November 2020 <br />