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Reclamation Specialist <br /> Mined Land Reclamation Division <br /> Page 2 <br /> Proposed Reclamation Plan: <br /> - Regrade slopes to a 2 1/2 :1 slope by a combination of cut <br /> and fill . <br /> - Pond surface will be graded at approximately a two percent <br /> slope toward the hillside. <br /> - Stabilization of the side-slopes and top is accomplished by <br /> placing an approximate 1 foot layer of overburden over the <br /> entire pond. <br /> - Revegetation is accomplished by a process of fertilization, <br /> seeding, maintenance and establishment of secondary plant <br /> communities. <br /> - Earthwork is scheduled for 1991 providing adequate <br /> construction time is available. <br /> The following points should be considered when evaluating the two <br /> plans: <br /> - The factors of safety for slope stability will be increased <br /> by regrading the slopes . <br /> The factors of safety are: <br /> Accepted Plan Proposed Plan <br /> Static 1 :24 - 1. 38 1 . 54 - 1 .89 <br /> Pseudo-Static 1:06 - 1 .17 1. 20 - 1. 47 <br /> The accepted plan has been tested on the flatter portion of <br /> the south slope of Tailings Pond #2 as part of test plot <br /> studies and appears to work to a certain degree but the 1:1 <br /> slopes on the east side and upper portion of the rest of the <br /> pond would be nearly impossible to work even by hand as in <br /> the plan. Slope reduction will be required if the slopes <br /> are ever to be reclaimed. <br /> The proposed fill material to grade the top of the pond <br /> toward the hillside in the accepted plan is coarse tailings <br /> material scalped from the tailings flow to the active <br /> tailings pond. Because the coarse material is a structural <br /> component of the active pond, this plan could not be <br /> implemented until the final stage of operation of the <br /> tailings holding facility. <br />