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The control points should be monitored weekly, after the initial installation. After several <br /> months of monitoring, the results should be reviewed by GEI for signs of slope movement. <br /> Depending on this review, the slope monitoring frequency can be adjusted up or down. <br /> It should be noted that Aggregate Industry has contracted with GEI to implement a <br /> monitoring program within the South Quarry. As mining within the West Quarry progresses, <br /> the South Quarry monitoring program should be expanded to cover active areas of the West <br /> Quarry as well. <br /> 8.3 Highwall Reclamation Recommendations <br /> The following inexpensive and simple techniques should be incorporated into the South and <br /> West Quarry Reclamation Plan and will assist in reducing the potential for rockfall hazard. <br /> On benches above El. 7,000 feet where topsoil backfilling and revegetation is permit <br /> required, several rockfall benches should be left open for rockfill catchment. GEI envisions <br /> this consisting of a 5 to 10-foot zone free of reclamation material every three to four(3 to 4) <br /> benches. This material free zone would reduce the potential for isolated rockfall from <br /> traveling down slope and propagating down to the active mine areas, reducing the risk to <br /> mine personnel and infrastructure. <br /> Quarterly scaling of final slopes below El. 7,000 feet will reduce the potential for overhead <br /> hazards. Machine scaling identifies instability in rocks within the highwall and removes the <br /> hazard utilizing various techniques under a controlled environment. <br /> 44 <br /> Aggregate Industries—Morrison Quarry GEI Consultants, Inc <br /> AM-07 Geotechnical Stability Exhibit November 2020 <br />