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LJ <br />' , configuration and 2.1 for the reclaimed configuration. The <br />minimum pseudostatic FOS is approximately 1.3 for both <br />constructed slopes and reclaimed slopes. These factors meet <br />the required minimums for earth and rock-fill clams specified <br />~ ' by the U.S. Army Corps of Engineers (1910) of 1 5 and 1.0 for <br />static and pseudostatic analyses, respectively. <br /> F <br />d <br />l <br />d <br />d <br />l <br />f <br />h <br />d <br /> or mo <br />erate <br />y <br />eep seate <br />s <br />ip sur <br />aces associate <br />wit <br /> a single bench, the minimum FOS for long-term static and <br /> pseudostatic loading conditions are 1.3 and 1.0, respectively <br /> for the construction phase and 2.0 and 1.3 respectively, for <br /> the long-term reclaimed slopes. The as-constru~:ted factors, <br /> while less than the U.S. Army Corps minimums, are high enough <br /> to indicate relatively low levels of risk and are, therefore, <br /> acceptable for slip surfaces including relatively small volumes <br /> of material such as those for a single bench. <br /> <br /> Under severe earthquake loading end-dumped, angle of <br />1 repose slope faces during construction may experience raveling <br /> and shallow slope failure to assume a less steep configuration. <br /> Using a pseudostatic coefficient of 0.15 g and a waste rock <br /> friction angle of 35 degrees, simple infinite slope stability <br /> analyses indicate that the end-dumped waste rock slopes may <br />1 adjust under earthquake loadings from 1.5H:1V to approximately <br /> 2H:1V. As the overall outside slope of the waste rock disposal <br /> facilities is designed to be 3H:1V, the anticipated slope <br /> adjustments under earthquake loadings will simply reduce the <br />1 effective bench setbacks without impacting the overall <br /> configuration of the facility. Deep seated failures are not <br />' anticipated to occur under the loading conditions evaluated. <br /> The waste rock dump locations and setback benching <br />' configuration will accommodate any minor slope adjustments <br />hil <br />t <br />i <br />d <br />l <br />l <br /> e main <br />ain <br />ng a net 3H:1V <br />ope and, therefore, wil <br />w <br />esign s <br /> not affect the overall stability of the facility during <br />t construction. Upon reclamation, single bench safety factors <br /> <br />' D-25 <br />