| 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. |
