As of July 5, 2016, Calaveras Road between Geary Road and Oakridge Road has been closed to vehicle, pedestrian, and bicycle traffic on weekdays for 18 months. This is due to large truck traffic on the narrow portions of Calaveras Road for dam construction.
Calaveras Road will be closed on WEEKDAYS ONLY between Geary Road and Oakridge Road – near the Santa Clara/Alameda County Line. Entrance to Sunol Regional Wilderness will be open at all times.
Calaveras Road opens Saturday mornings 6 a.m. and closes Sunday evenings at 11:00 p.m.
To stay updated, please join our road closure notification mailing list by emailing firstname.lastname@example.org. For more details on the upcoming Calaveras road closure at sfwater.org/Calaverasroad
What's New at Calaveras Dam?
Construction began in 2011 to build a new earth and rock fill dam adjacent to the existing dam. To date, the Contractor has moved over six million cubic yards of earth and rock materials and started to construct the new dam. Crews have constructed a new shaft and five adits (tunnels) which connect outlet pipelines to the reservoir. We have completed grouting operations on the right abutment and continue grouting on the left abutment. Completion of the new spillway is expected sometime in Spring 2016. A new 78 inch diameter pipe has been installed and encased in concrete, which will be connected to existing lines to deliver water. Dam embankment work is scheduled to begin in late 2016. As of June 2016, the project is over 75% complete.
Calaveras Road Advisory:
- Construction haul trucks are expected on Calaveras Road from 6:00 a.m. to 4:00 a.m. Monday through Friday
- Please drive slowly and bike safely on the narrow portions of Calaveras Road
- Speed limit is 25 mph in construction zones
- Bicyclists traveling in groups are encouraged to ride in single file,
to share the road with oncoming trucks and vehicles
- This affects the portion of Calaveras Road from the Highway 680 entrance in Sunol to the dam site south of Geary Road
The 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.