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<br />Aggregate Industries Morrison Quarry GEI Consultants, Inc. <br />Geotechnical Addendum, 2016 Annual Report 10 January 2017 <br />Fig. 5 through 10 present photographic documentation of the Bench 7113 scanline. Fig. 24 <br />shows some typical tension cracks visible on the bench (resulting from mining on Bench <br />7270 and 7113). These tension cracks are considered to be minor and a “part of” the mining <br />process. However, AI should monitor and be aware of rockfall hazards resulting from crack <br />propagation. <br />3.3.2 Bench 6850 <br />The Bench 6850 scanline is approximately 1,390 feet long and divided into seven distinct <br />sections. All consisted primarily of granitic and biotic gneiss with several mafic and <br />pegmatite intrusions. Highly variable joint sets were present throughout the scanline. <br /> Section A (Sta. 0+00 to Sta. 1+30) of the scanline trended 320 degrees. The <br />bottom third was obscured by rubble and snow. Foliations exhibited a strike <br />ranging from 130 degrees to 340 degrees with dips ranging from 5 degrees to <br />25 degrees. Two primary joint sets were evident. The first primary set exhibited an <br />average strike of 102 degrees and an average dip of 57 degrees. The second set <br />exhibited an average strike of 348 degrees and an average dip of 78 degrees. <br />Moderate iron oxide staining was present. The RMR classification is Poor to Fair. <br /> Section B (Sta. 1+30 to Sta. 3+75) of the scanline trended 320 degrees. The <br />bottom third was obscured by rubble and snow. Foliations exhibited a strike <br />ranging from 140 degrees to 270 degrees with dips ranging from 5 degrees to <br />25 degrees. Two primary joint sets were evident. The first primary set exhibited an <br />average strike of 114 degrees and an average dip of 87 degrees. The second set <br />exhibited an average strike of 309 degrees and an average dip of 80 degrees. <br />Moderate iron oxide staining was present. The RMR classification is Poor to Fair. <br /> Section C (Sta. 3+75 to Sta. 6+10) of the scanline trended 0 degrees. Foliations <br />exhibited a strike ranging from 10 degrees to 355 degrees with dips ranging from <br />45 degrees to 80 degrees. Two primary joint sets and one secondary joint set were <br />evident. The first primary set exhibited an average strike of 283 degrees and an <br />average dip of 70 degrees. The second set exhibited an average strike of <br />338 degrees and an average dip of 83 degrees. The secondary set exhibited an <br />average strike of 180 degrees and an average dip of 40 degrees. Iron oxide staining <br />was prevalent. A near vertical pegmatite was located at Sta. 5+35. A minor section <br />of adversely dipping foliation was present in the upper half of the highwall from <br />Sta. 3+75 to 5+00. Potential rockfall is limited due to jointing and highly variable <br />foliation. The RMR classification is Poor to Fair. <br /> Section D (Sta. 6+10 to Sta. 8+50) of the scanline trended 0 degrees. Foliations <br />exhibited a strike ranging from 200 degrees to 350 degrees with dips ranging from <br />20 degrees to 65 degrees. Two primary joint sets were evident. The first primary <br />set exhibited an average strike of 291 degrees and an average dip of 80 degrees.