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Diversion Channel <br /> Maximum velocity 10 feet per second <br /> Freeboard Greater of 1 ft or v2/2g <br /> Channel lining type Riprap with Cana 130geocomposite <br /> a. Riprap to be hand placed to ensure interlocking stability and protect liner. <br /> 2.4 Geotechnical Stability <br /> The MLRB Policies identify minimum factors of safety for slope stability analysis for mine <br /> operations and reclamation. The proposed diversion channel design is considered a non-critical <br /> structure (a structure where there is no imminent danger to human life, minor repair costs, and <br /> minor environmental impacts if slope fails). Based on this non-critical designation, a factor of <br /> safety of 1.3 was used in stability analyses. <br /> 1670 Broadway,Suite 3400,Denver,CO 80202-4824 hdrinc.com <br /> (303)764-1520 <br /> 12 <br />