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ALERT: Calaveras Road Reopens Thursday, January 3, 2019 at 10:00 a.m.

Calaversas Road Closure map
  • See a map of the closure.
  • What:

    Calaveras Road reopens to thru traffic between Milpitas and Sunol on Thursday, January 3, 2019 at 10:00 a.m.

    The road will be open to all traffic, weekdays, weekends, and holidays starting at that time. 

    Please note that construction trucks and other large vehicles will still be using the road, so please drive and ride with caution.

    We have been working with the appropriate county agencies to secure final approval for renewed public access to the road after a portion of the road was built by the SFPUC to replace a portion undermined by landslide.


    The San Francisco Public Utilities Commission (SFPUC), owner and operator of the Hetch Hetchy Regional Water System, is completing construction of a new dam to replace the former 93-year-old Dam at Calaveras Reservoir in the Sunol Valley. Restoring Calaveras Reservoir is one of the most important projects of the $4.8 billion Water System Improvement Program. Calaveras Reservoir is the Hetch Hetchy Regional Water System’s largest Bay Area reservoir when it is full. Restoring its historic levels is crucial for water supply to 2.7 million people in the Bay Area in times of drought and emergencies. Construction on the earth and rock fill dam began in 2011. 

    The closure of Calaveras Road began in July 2016 to protect public safety on the extremely narrow portions of Calaveras Road while large trucks utilized the road for construction.  The Road reopens on Thursday, January 3, 2019 at 10:00 a.m.

    Road Reopening Details


    Calaveras Road just south of Geary Road (entrance to Sunol Regional Wilderness) to Oakridge Road near the Alameda /Santa Clara County line.

    When: January 3, 2019 at 10:00 a.m.

    The Road will be open on weekdays, weekends, and holidays starting Thursday, January 3, 2019.

    Thank you for your patience!




    Learn more about the Calaveras Dam Replacement Project here.


    Last updated: 1/2/2019 11:18:10 AM