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north-south. In project documents, the J1 joint set typically strikes east-west and the J2 joint <br /> set typically strikes north-south. Both sets are similar in spacing, roughness, and condition. <br /> The joint sets are closely spaced (SP5: 0.1 to 0.3 ft)to very widely spaced (SP2: 3 to 10 ft). <br /> Joint surfaces are planar and are stepped (R1)to moderately rough (R4). The joint sets are <br /> less continuous than the foliation joints and are mostly discontinuous (C1: less than 3 ft <br /> lengths)to slightly continuous (C2: 3 to 10 ft). Iron staining is observed on many joint <br /> surfaces, with less staining typically observed at lower elevations. Most joints generally do <br /> not contain infill material. <br /> Figure 2-1 shows stereonet projections for discontinuities at the South Quarry and the West <br /> Quarry. <br /> i13 <br /> 13 r <br /> W ;11 I � �E <br /> s #1 <br /> ���-�lofic oiwc <br /> s <br /> 7ttl�Llke � <br /> w � E <br /> 5� <br /> } hdrn'U1srt <br /> S <br /> Figure 2-1. Stereonet plots showing poles to planes with average joint set <br /> windows for the South Quarry (upper) and West Quarry (lower). <br /> 9 <br /> Aggregate Industries—Morrison Quarry GEI Consultants, Inc. <br /> AM-07 Geotechnical Stability Exhibit November 2020 <br />