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5.0 CONCLUSIONS <br />5.1 North Quarry <br />The observed condition of the slopes within the North Quarry appears to be stable. Observations <br />of the North Quarry include: <br />• No large scale failures in the past year. <br />• Minor accumulations of slough material and small rocks. <br />• Nearly all material was contained on adjacent bench surfaces, however it is <br />impossible to be entirely certain as water within the cell prevents full observation <br />(observation of material on the cell floor). <br />5.2 Central Quarry <br />The observed condition of the slopes within the Central Quarry appears to be stable. <br />Observations of the Central Quarry include: <br />• No large scale failures in the past year. <br />• Minor accumulations of small rocks (up to 1 feet diameter) on bench surfaces. <br />• Nearly all material was contained on the adjacent bench surfaces with very little <br />evidence of the material proceeding down slope to subsequent benches. <br />• The stabilized slope in the northeast section of the Quarry did not exhibit any <br />instability or large erosional features. <br />• The highwall face adjacent to the haul road did not exhibit any instability or large <br />erosional features. <br />• A tension crack was observed on the south wall. Sloughing could occur in this area <br />and should be monitored. No work in this area is anticipated in 2013. <br />5.3 South Quarry <br />Mining in the South Quarry in 2012 appeared to adhere to the mine plan and did not extend the <br />quarry depth below approximate elevation of 6640. Rock observed in the highwalls consisted <br />primarily of biotite and granitic gneiss with localized areas of pegmatitic and mafic intrusions. <br />Rock exposed at elevation 7450 and 7325 to 7270 and portions of the rock exposed at elevation <br />6700 and 6640 appeared fresh to moderately weathered. Portions of rock exposed at elevation <br />6700 and 6600 and associated with the fault zone appeared weak (poor), highly weathered, and <br />altered by shear. Highwall orientations are primarily north to south (east facing) with a localized <br />east to west (north facing) highwall on bench 6640. Foliation and joint orientations are favorable <br />with respect to this highwall development plan. <br />12 <br />Morrison Quarry Annual Report 2012 <br />P \23514 \133-23514-13002 \DeliverablesTeliv-01-2012 Annual Report \Annual Report 2012_Geotech doc <br />January 2013 <br />