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<br />. <br /> <br />. <br /> <br />097 G 2. Additional investigations in the iine of more drilling <br /> <br /> <br />and in more widespread surface geologic mapping is <br /> <br />needed and might ultimately remove the remaining appre- <br /> <br />hension as to the adequacy of the reservoir site. <br />The U. S. Bureau of Reclamation <br /> <br />The U. S. Bureau of ReclamatiJn maintains they have made a <br /> <br />sufficiently thorough geologic investigation of the site to prove <br /> <br />that it is geologically feasible. They agree that it is not <br /> <br />geologically the best site ever chosen, but at the same time it is <br /> <br />also not the worst. If' it were proven or considered to be in- <br /> <br />adequate by the Board of Consultants they stated that they were <br /> <br />ready to leave the site. They also brought out the fact that, <br /> <br />wherever needed, there will be additional detailed investigations <br /> <br />made for specific design use. <br /> <br />DISCUSSION <br />Analysis of the various contentions relates them all to the <br /> <br />two categories, potential leakage and stability. <br />Stability <br /> <br />The question of stability relates primarily to character and <br /> <br />behavior of the geologic formation known officially as the Eagle <br /> <br />River Evaporite but designated herein as the "gypsum" or the <br /> <br />"evaporite". The normal thickness of the evaporite in the Ruedi <br /> <br />area is believed to be around 1,000 feet. Geologists who have made <br /> <br />special studies of the evaporite indicate that it is of erratic <br /> <br />and limited areal extent. It is overlain by the Maroon formation <br /> <br />composed of interbedded layers of hard red sandstone and shale <br /> <br />- 4 - <br />