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Anchor Dam

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The dam is placed on fresh competent sandstone of the Tensleep Formation which  was grouted and concreted to seal joints and cavities in dolomite interbeds. Treatment by concreting and grouting  solution cavities and open joints has strengthened the foundation sufficiently to support the  weight of the dam. The seal provided by concreting and grouting in the Tensleep rocks is  probably effective only within a short radius of the dam foundation.

Last updated: Mar 29, 2013