In 2003, AAI was contracted to supply the specialized equipment and personnel required to conduct overcore stress determinations at the U.S. Bureau of Reclamation (USBR) Seminoe Dam, located near Rawlins, Wyoming.  The project consisted of two vertical holes drilled from the crest of the dam and two horizontal holes drilled from the downstream face of the dam.  Eleven 2D stress determinations were completed using the U.S. Bureau of Mines borehole deformation gage method between 49 and 75 feet deep in the two vertical holes.  Nine stress determinations were completed in the two horizontal holes from 10 to 30 feet deep.  Stress determinations and details of the overcoring activities were documented in an engineering report.


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Alcoa Aluminum - Santeetlah Dam overcoring