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CONCLUSIONS <br /> " . Sedimentation and drainage control structures have been designed for Mines <br /> 3, 4, and S. fisting structures at Mines 3 and 4 are providing a means to <br /> manage sediment storage and to iz4)rove -water quality. The proposed sediu- tati_on <br /> structure will enable the operator Mid-Continent Reso-L ces, Inc to met state <br /> and Federal regulations. <br /> Constriction of the proposed improveants - -ill require substantial. excavation <br /> of previously undisturbed slopes. Such construction of ponds w,1.1 in at least <br /> one case cause massive slope failure (Mine- 4)'. - <br /> -10- <br /> 52 <br />