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<br />o 9 7 5 solution cavities in gypseous rocks in and near the site. <br /> <br />. <br /> <br />. <br /> <br />2. The general instability of the area is shown b~ the <br /> <br />presence of a gypsum plug within the proposed reservoir. <br /> <br />The contortion of this intrusive mass and inclusion of <br /> <br />brecciated material in it, as well as other active in- <br /> <br />trusions in the region. indicate that this rock has been <br /> <br />in motion in recent geologic time. This movement almost <br /> <br />certainly continues to the present. Accelerated movement <br /> <br />would be triggered by the load of any water which might <br /> <br />be impounded in the reservoir. Further movement of the <br /> <br />gypsum plug almost certainly would induce fracturing <br /> <br />which would impair the reservoir. <br /> <br />3. Although it has been contended that the water table is <br /> <br />tributary to the reservoir site. loss of drilling fluid <br /> <br />and erratic water levels in test holes imply that a <br /> <br />series of perched water tables prevail in the area. <br /> <br />These erratic water levels show that the true water <br /> <br />table lies substantially below the floor of the reservoir <br /> <br />basin. " <br /> <br />At a joint meeting held with the Board of Consultants on <br /> <br />September 12, 1963 at the Federal Center this group went into <br /> <br />greater detail in their comments and expressed the additional <br /> <br />opinions that, <br /> <br />l. They did not believe the darnsite itself was unsatisfactory <br /> <br />and had therefore omitted reference to it in their <br /> <br />original report. <br /> <br />- 3 - <br />