What's New at Calaveras Dam?
Construction began in 2011 to build a new earth and rock fill dam adjacent to the existing dam. As of September 2018 construction on the embankment of the dam is complete. The replacement dam has reached its final height of 220 feet. We began refilling Calaveras Reservoir this winter.
We have a great deal more to do before the entire project is complete. We must construct roads, work on site restoration, automation and instrumentation in the new dam, and finish the approach channel to allow water to eventually fill the space between the old dam and the new dam.
The Calaveras Dam Replacement Project consists of building a new zoned earth and rock fill dam immediately downstream of the existing dam. The replacement dam will have a structural height of 220-feet high and is designed to accommodate a maximum credible earthquake on the Calaveras Fault. The dam will have a crest length of 1,210 feet, a base thickness of 1,180 feet, and crest thickness of 80 feet. The total volume of the dam will be approximately 3.5 million cubic yards. The replacement dam will restore the original reservoir capacity of 96,850 acre-feet, or 31 billion gallons of water. The storage is crucial to providing adequate water to our 2.7 million customers in the Bay Area.
Check out our time lapse video of our construction progress.