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• Sr_.OPE <br />This report presents results of a geotechnical investigation for <br />the design of proposed excess spoil disposal areas for the Energy Fuels <br />Corporation Eckman Park Mine. The Eckman Park Mine is essentially an <br />extension of the existing operating mine. The report includes a des- <br />cription of the foundation conditions anticipated in each proposed <br />spoil disposal area, discussion of general geologic conditions in the <br />area, our observations regarding springs, seepage, ground water flows <br />and surface drainage conditions, a discussion of the nature of the rock <br />material to be incorporated in the spoil fill, recommended locations <br />and type of materials to be used in underdrains and the results of a <br />stability analysis of proposed disposal sites. The report was prepared <br />• based on conditions disclosed in exploratory borings, observations made <br />in the field during this investigation, and data compiled from various <br />other geotechnical investigations at the Energy Fuels Mine. <br />SITE SELECTION <br />The proposed mine plan imposes several constraints on areas which <br />could be selected for disposal of excess spoil. The excess spoil will <br />be generated from initial box cuts which are essentially anticipated <br />to occur during 1980 and 1981. The spoil disposal sites were selected <br />in areas where overburden thicknesses were sufficient to make the coal <br />mining not feasible. Additionally, the sites were selected where the <br />ground surface conditions were reasonably favorable and haul could be <br />accomplished without excessive environmental damage. To minimize en- <br />• vironmental disturbance, Energy Fuels specified locations to be within <br />