On Feb. 25, 2025, the Valley Water Board of Directors approved resolutions to certify the final Environmental Impact Report, approve the engineer’s report for the Anderson Dam Seismic Retrofit Project, and approve the environmentally superior alternative described in the EIR.
This decision followed a public hearing and is an important step in Valley Water’s effort to rebuild Anderson Dam.
The final EIR covers all parts of the Anderson Dam Seismic Retrofit Project, including:
- Retrofitting and upgrading the dam and its facilities
- Conservation measures to reduce negative environmental impacts
- Programs for monitoring, operations and maintenance, and adaptive management
You can review the final EIR and engineer’s report at valleywater.org/public-review-documents.
Valley Water has made significant progress in designing the Anderson Dam Retrofit Project, securing environmental permitting and selecting a contractor. Our agency must complete these steps before construction begins.
Valley Water is also making steady progress in its work at Anderson Dam. In September 2024, our crews finished excavating a 1,736-foot-long tunnel next to Anderson Dam. The new, larger tunnel will help Valley Water release more water from the reservoir during an emergency.
Valley Water will begin retrofitting the dam embankment and spillway once the necessary permits are obtained. Our work includes building new outlet pipes, removing and constructing the spillway, and rebuilding the dam embankment. It is estimated to start in January 2027 and last about seven years. Once finished, Valley Water will again be able to fill Anderson Reservoir.
To learn more about our work at Anderson Dam, visit valleywater.org/project-updates/c1-anderson-dam-seismic-retrofit.