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formation and raveling are anticipated to be limited in size, and should be retained on the <br />bench below the highwall and only cause local operational delays. <br />Figure 16 presents a photo documentary of Runaway Truck Ramp 6825 Highwall. <br />3.3.8 Bench 6640 <br />The Bench 6640 scanlines are approximately 550 feet long and 245 feet long. Scanline A is <br />divided into four distinct sections. Scanline B is divided into two distinct sections. <br />3.3.8.1 Scanline A <br />Sta. 0 +00 to 1 +95 of Scanline A was not mappable due to overburden, mine waste, <br />and/or rockfall obscuring the wall. However, it is assumed the highwall conditions <br />are similar to adjacent observable /mappable sections. The trend of the highwall <br />was 0 degrees (north 0 degrees east). <br />Sta. 1 +95 to 3 +80 of Scanline A consisted of primarily of granitic and biotitic <br />gneiss with localized pegmatite intrusions. Rocks observed within the highwall <br />typically exhibited moderate to high compressive strength (estimated) and very <br />poor to fair quality RQD. The trend of the highwall was 000 (north 0 degrees east). <br />Two primary joint sets were evident. The first set exhibited a strike ranging from <br />350 degrees to 35 degrees with dips ranging from 60 to 90 degrees. The spacing <br />between of these joints varied, but was typically moderate to wide. The persistence <br />of the joints was also widely variable, but ranged from low to medium. Apertures <br />of the joints were tight to moderately open with slightly rough to rough surfaces <br />and were slightly weathered. The second primary joint set exhibited a strike <br />ranging from 90 degrees to 110 degrees with dips ranging from 40 degrees to 75 <br />degrees. This joint set had similar properties to primary joint set 1— very poor to <br />fair quality RQD, close to moderately spaced joints, low to medium persistence, <br />moderately open to tight joint apertures, and slightly rough to rough rock surfaces, <br />and slight weathering. Foliations exhibited a strike ranging from 320 degrees to 10 <br />degrees with dips ranging from 10 degrees to 35 degrees. The spacing between of <br />the foliation varied, but was typically close to wide. The persistence of the <br />foliation was also widely variable, but ranged from medium to high. Apertures of <br />the foliation were moderately open to tight with slightly rough to rough surfaces <br />and were slightly weathered. <br />Two secondary joint sets were present within the Bench 6640 from Sta. 1 +95 to <br />3 +80 of Scanline A. The first set exhibited a strike ranging from 220 degrees to <br />230 degrees with dips ranging from 75 to 90 degrees. The spacing between of <br />these joints varied, but was typically wide. The persistence of the joints was also <br />widely variable but was typically low. Apertures of the joints were moderately <br />open to tight with slightly rough to rough faces and were slightly weathered. The <br />second set exhibited a strike ranging from 355 degrees to 20 degrees with dips of <br />GEI Consultants, Inc 20 January 2014 <br />2013 Morrison Quarry Annual Report <br />