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strike ranges from 265 to 275 degrees and generally dips from 81 to 90 degrees <br />southwest to southeast. A second primary joint set strike ranges from 155 to <br />160 degrees and generally dips 56 to 67 degrees northeast. The spacing of the <br />primary joint sets varied widely, but averaged approximately 18 inches. Joint <br />apertures were tight to moderately open with slightly rough to rough faces. <br />Small blocks may form in this area due to the orientation of the highwall and jointsets of <br />the rock. These blocks are anticipated to be limited in size, and should be retained on the <br />bench below the highwall. Due to the moderately to highly fractured nature of the rock, <br />raveling is to be expected in this area. The discontinuities dipping to the northeast may be <br />more prone to raveling. Raveling from this zone should be retained on the bench below <br />the highwall and is anticipated to cause only local operational delays. <br />• Stations 8 +60 through 13 +80 consisted of granitic gneiss that has been altered <br />and is part of a weak rock associated with the fault mapped in the area (Scott, <br />1972). RMR data was gathered on the remnant foliation and jointsets <br />observable between stations 8 +60 through 10 +80. Above approximately 20 <br />feet (station 8 +60) the rock is granitic gneiss in fair condition. The granitic <br />gneiss disappears from the highwall at approximately station 10 +00. The <br />foliation strike in this area varies due to minor folding and ranges from 291 to <br />313 degrees with a dip ranging from 20 to 26 degrees southwest to southeast. <br />Foliation spacing ranges approximately 4 inches to more than 2 feet, and <br />foliation apertures were tight and slightly rough to very rough. The primary <br />joint set strike ranges from 68 to 76 degrees and generally dips from 68 to 76 <br />degrees northwest. A second primary joint set strike ranges from 290 to 314 <br />degrees and generally dips 76 to 90 degrees southwest. The spacing of the <br />primary joint sets varied widely, but averaged approximately 18 inches. Joint <br />apertures were tight to moderately open with slightly rough to rough faces. <br />• Stations 10 +00 through 13 +80, the rock is sheared granitic gneiss. Between <br />stations 10 +80 and 13 +80 the rock is completely weathered and/or covered by <br />overburden. The highwall in this area is unmappable. Minor seepage <br />associated with the fault was observed at approximately station 10 +70. <br />Figures 7 and 8 are a photo documentary of the features observed in Bench 6700. <br />4.0 RESULTS AND DISCUSSION <br />Observations of the North Quarry indicate little change in the finished slopes since January <br />2011. Local rock sloughing was observed and classified as minor based on rock <br />accumulations observed on bench surfaces throughout the North Quarry. The condition of <br />the remaining North Quarry is anticipated to remain stable with only small scale rockfall <br />expected to occur. <br />Observations of the Central Quarry indicate little change in the finished slopes since <br />January 2011. Partial reclamation work will continue in 2012 and will consist of continued <br />placement of stripped material within the quarry below approximate elevation 6500. Local <br />- 9 - <br />Morrison Quarry Annual Report 2011 <br />P \23514 \l33 2 35 14- I2002 \Deliverables\Deliv-01- Annual Report \ Annual_Report_20 1 1 _Geotech.doc <br />January 2012 <br />