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6.1.3 Highwall Reclamation Recommendations <br /> The following inexpensive and simple techniques should be incorporated into the South and <br /> West Quarry Reclamation Plan. <br /> On benches above El. 7,000 feet where topsoil backfilling and revegetation is permit <br /> required, several rockfall benches should be left open. GEI envisions this consisting of a 5 to <br /> 10-foot zone free of reclamation material every 3-4 benches. This material free zone would <br /> reduce the potential for rocks"weathered loose" from slopes above the bench from gaining <br /> energy and propagating down(rolling)to the active mine areas, reducing the risk to mine <br /> personnel and infrastructure. <br /> Quarterly scaling of final slopes below 7000 will reduce the potential for overhead hazards. <br /> Scaling identifies instability in rocks within the highwall and removes the hazard utilizing <br /> various techniques under a controlled environment. <br /> Aggregate Industries Morrison Quarry GEI Consultants,Inc. <br /> AM-06 Geotechnical Stability Exhibit 42 August 2018 <br />