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Calaveras Dam Replacement Project

Project Information
Construction
Start
August 2011
Construction
Finish
April 2019
Cost $810 Million
Project Phase Construction
Additional Information

The information shown reflects the current forecast information published in the latest WSIP Quarterly Report.

Project Materials

Project Fact Sheet - February 2017
Spillway Media Fact Sheet

Naturally Occurring Asbestos Information and Data

Naturally Occurring Asbestos Questions and Answers
Air Monitoring Results

 

Environmental Impact Report

Volume 1      • Volume 5-6
Volume 2      • Volume 5-7
Volume 3      • Volume 5-8
Volume 4      • Volume 6
Volume 5-1   • Addendum 1
Volume 5-2   • Addendum 2
Volume 5-3   • Addendum 3
Volume 5-4  
Volume 5-5  

Summary Data Reports from
Air Monitoring Events

August 2008 through August 2009
September 2009 through July 2010
August 2010 through November 2010

 

Need more information? Contact:

Maria Le
Phone: 925.493.4535
Email: mle@sfwater.org

Betsy L. Rhodes
Phone: 415.554.3240
Email: blauppe@sfwater.org

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Calaveras Dam construction at dusk

Project Update

ALERT: FULL CLOSURE OF CALAVERAS ROAD DUE TO STORM DAMAGE
EFFECTIVE, JANUARY 12, 2017

CLOSURE IN EFFECT 7 DAYS A WEEK, 24 HOURS A DAY

Effective January 12, 2017, a full closure of Calaveras Road to all types of thru traffic 7 days a week, 24 hours a day between Geary Road and Oakridge Road – near the Alameda/Santa Clara County line.

This is due to storm damage along this stretch of road. Under normal conditions and the construction schedule, Calaveras Road would be open to thru traffic on weekends and holidays. However, this is no longer the case, and the road will remain closed every day to all traffic until further notice.

Learn more at the Calaveras Road Closure Link above.

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.

Project Description

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.


Construction team standing in the newly completed dam spillway 

Team members celebrate completion of the new spillway in April 2016

Check out our time lapse video of our construction progress.

Last updated: 2/16/2017 4:45:20 PM