ALERT: CALAVERAS ROAD CLOSURE EXTENDED to SEPTEMBER 30, 2018. ROAD TO REOPEN ON WEEKENDS IN 2018. PLEASE STAY TUNED FOR UPDATES.
The Closure of Calaveras Road to thru traffic between Milpitas and Sunol has been extended to September 30, 2018.
The road had also been closed on weekends and holidays because of a landslide that undermined the road within the closure section. We anticipate the road to reopen for weekend use sometime in 2018. Please keep checking back for schedule details.
Learn more at the Calaveras Road Closure page.
What's New at Calaveras Dam?
Construction began in 2011 to build a new earth and rock fill dam adjacent to the existing dam. The new spillway was completed in April 2016, including installation of the spillway bridge, and installation of all the structural concrete walls on the spillway.
Several major components have been completed including the intake tower, electrical building, and foundation grout curtain. Now, we are working on dam embankment and the downstream structures such as the stream maintenance building and the valve vault. The project has experienced some slowdown in activities due to recent storms, but as of January 2017, the project is over 80% complete.
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 2.6 million customers in the Bay Area.
Team members celebrate completion of the new spillway in April 2016
Check out our time lapse video of our construction progress.