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6.1.2.3 Additional Monitoring <br /> Additional monitoring can be implemented if signs of slope instability are noted or <br /> anticipated. This monitoring can be tailored to specific areas and/or failure modes and <br /> include: <br /> • Crack meters <br /> • Inclinometers <br /> • Piezometers <br /> • Wireline or borehole extensometers <br /> • Time domain reflectometry (TDR) <br /> 6.1.3 Highwa/l Reclamation Recommendations <br /> The following inexpensive and simple techniques should be incorporated into the South <br /> 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 /> South Quarry Highwall Design Technical Revision 30 August 2017 <br />