Chabot Dam Upgrade

Chabot Dam Upgrade

Chabot Dam Upgrade

EBMUD is planning seismic upgrade work on the dry side of Chabot Dam and on the dam's outlet tower. Chabot Dam was built in 1874 and retrofitted in 1980. Additional work is required at this time because a small portion of surface fill added to the bottom of the dam in the 1880s could cause the dam to settle approximately three feet in a major earthquake. Settlement would not cause the dam to fail, because there is at least 23 feet of space between the top of the dam and the top of the water. However it would require draining the reservoir and rehabilitating the dam after an earthquake. The proposed project is intended to strengthen the dam.

The outlet tower of the dam (which is adjacent to the northwest corner of the dam and is used to release water from Lake Chabot) could also be made inoperable by an earthquake. To address this issue, EBMUD will move the valves and controls to an existing onshore shaft and remove the tower and pavilion. There is no water outage associated with this project. 

EBMUD met with stakeholders around Chabot Dam (neighbors, agencies and interested parties) between 2012 and 2014. The EBMUD Board certified the project Final EIR on June 10, 2014. 

Workplan and schedule

Construction began in May 2016 and is expected to be completed in October 2017. San Leandro City Chabot Park off of Estudillo and portions of the West Shore Trail in Lake Chabot Regional Park are closed.


Laura Luong, Community Affairs Representative
Phone: 510-287-0140

For after-hours, call EBMUD at 866-403-2683.

Contractors: For bid opportunities on EBMUD projects see Business center.