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<br />Aggregate Industries Morrison Quarry GEI Consultants, Inc. <br />Geotechnical Addendum, 2016 Annual Report 8 January 2017 <br />present at lower elevations. Joints generally do not contain infill material with several <br />localized exceptions. <br />Foliation spacing is highly variable and ranges from less than one inch to several feet. The <br />aperture of the foliation is typically tight; less than one-tenth of an inch. Foliation plane <br />surfaces are generally characterized similarly to the two prominent joint sets: the surface is <br />slightly rough to rough, and slightly weathered to moderately weathered with iron oxide <br />staining. Infill material is not present except in localized incidences. <br />Sillimanitic gneiss associated with the shear zone was exposed and excavated on Bench 6640 <br />and Bench 6600 in localized areas. The persistence of this material appears to be consistent <br />with the shear zone trend mapped in previous geotechnical addenda. <br />Average rock strength estimated using the RMR values indicate rock of poor to good quality <br />for benches mapped. <br />Detailed RMR bench data are included in Appendix A. Brief descriptions of scanline <br />observations including notes on unusual rock features such as shear zones, intrusions, <br />adversely dipping foliation, and areas of potential instability are presented below. The strike <br />direction is established using the right-hand rule. The right-hand rule is an arbitrary <br />standardization that states that of the two opposing strike directions the strike that is <br />90 degrees to the right of the dip direction shall be selected. <br />3.3.1 Bench 7113 <br />The Bench 7113 scanline is approximately 880 feet long and divided into six sections. All <br />consisted primarily of granitic and biotic gneiss with a few mafic and pegmatite intrusions. <br />Highly variable joint sets were present throughout the scanline. <br /> Section A (Sta. 0+00 to Sta. 0+62) of the scanline trended 310 degrees from <br />Sta. 0+00 to 0+25 and trended 5 degrees from Sta. 0+25 to 0+62. Foliations <br />exhibited a strike ranging from 20 degrees to 350 degrees with dips ranging from <br />5 degrees to 10 degrees. Two primary joint sets were evident. The first primary set <br />exhibited an average strike of 34 degrees and average dip of 74 degrees. The <br />second set exhibited an average strike of 103 degrees and an average dip of <br />61 degrees. Iron oxide staining was prevalent. The RMR classification is Poor to <br />Fair. <br /> Section B (Sta. 0+62 to Sta. 1+85) of the scanline trended 5 degrees. Foliations <br />exhibited a strike ranging from 190 degrees to 360 degrees with dips ranging from <br />5 degrees to 45 degrees. Two primary joint sets were evident. The first primary set <br />exhibited an average strike of 290 degrees and average dip of 78 degrees. The <br />second set exhibited an average strike of 173 degrees and average dip of