We continue digging away here at the Calaveras Dam Replacement Project. In July we reached a milestone of excavating the first million cubic yards of earthen material. This week we have reached another important place---the foundation of the dam. The foundation of the new dam will be on bedrock and is located almost 225 feet below the top of the existing dam. The existing dam still holds back the Calaveras reservoir and, as expected, we encounter some minor seepage at the bottom that is controlled by pumping to our storm water treatment system. This is just the first phase of excavation work on the east side of the dam foundation. The west side of the dam foundation will be done later as we prepare that surface for the installation of the new dam’s spillway. It is important to note that this significant construction project is taking place while the Calaveras reservoir remains in service as an important source of drinking water for our Bay Area customers.
View of excavated area of dam foundation
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