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1 <br /> hydrostatic pressure serves to improve the overall stability of the north pit wall. <br /> Based on this analysis, no massive failures of the North Wall are evident or expected. The <br /> current mining method of maintaining 45 degree slope faces and reclaiming immediately <br /> behind the drilling and blasting has over a considerable time, proven to be a successful <br /> quarry design. <br /> Several shallow soil slumps are currently visible along the North wall; however, these <br /> conditions are localized and have no substantial impact on the overall quarry wall stability. <br /> ' WEST WALL <br /> ' The stability corriditions along the West Wall are fairly similar to the conditions experienced <br /> along the East Wall. Photo 7 shows the waviness associated with the bands of the <br /> foliations along the West Wall. The intersections of these foliations with planar features <br /> ' represented by pole P-6 on Figure 7 have a plunge angle lower than that of the face slope <br /> angle, thereby allowing the formation of small wedge failures. Several of these wedge <br /> ' failures can be seen in Photo 7. Figure 7 also clearly shows the benefit of maintaining the <br /> 45 degree slope face for the West Wall. The prominent feature represented by pole P-2 <br /> ' strikes parallel to the slope face with a dip of approximately 65 degrees. By maintaining <br /> the current slope face angle, these structural features will be prevented from "daylighting" <br /> into the slope. <br /> ' No damp areas or seeps were observed during these investigations. This "dry" condition <br /> along with the soil placement and seeding (see Photos 8-9) of the reclamation process will <br /> rfurther improve stability conditions along the West Wall. <br /> 16 <br />