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Table 1. Recommended Minimum Factors of Safety for Slope Stability Analyses for <br /> Operations and Reclamation <br /> Critical Structures (e.g., residences, 1 .5 1 .3 <br /> utilities, dams, pipelines, irrigation canals, (1.3)(2) (1.15)(2) <br /> public roads, etc.) <br /> Potential human safety risk, major <br /> environmental impact, and major repair <br /> costs if slope fails (includes Environmental <br /> Protection Facilities/EPFs, such as tailings <br /> facilities, heap leach pads, process <br /> effluent ponds, milling facilities, <br /> overburden/waste rock storage facilities, <br /> and hazardous/toxic material storage <br /> facilities, etc.) <br /> (1) The number of tests required to provide a high degree of confidence in the strength <br /> parameters used depends on the variability of the material being tested and the <br /> extent of disturbance. <br /> (2) Numbers without parentheses apply for analyses using static conditions. Those <br /> within parentheses apply to analyses using seismic parameters. Based on site <br /> specific conditions, seismic analyses may be required and parameters selected shall <br /> be consistent with the risk and duration of the condition being considered. <br /> * The values presented in Table 1 are not intended to supersede standards <br /> required by other agencies. <br /> Effective May 16,2018 MLRB Policies Page 13 <br />