Anderson Dam Seismic Retrofit Project

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At Valley Water, we are working to protect our community’s drinking water, keep residents and businesses safe from flooding and natural disasters, repair and replace aging dams, reservoirs and pipelines, while reducing toxins, hazards and contaminants in our waterways.

Anderson Reservoir is currently limited to about 58% of its capacity due to seismic concerns, costing Santa Clara County valuable drinking water resources. This project covers earthquake retrofitting of Anderson Dam to improve reliability and safety, and returns the reservoir to its original storage capacity.

At Valley Water, we are working to protect our community’s drinking water, keep residents and businesses safe from flooding and natural disasters, repair and replace aging dams, reservoirs and pipelines, while reducing toxins, hazards and contaminants in our waterways.

Anderson Reservoir is currently limited to about 58% of its capacity due to seismic concerns, costing Santa Clara County valuable drinking water resources. This project covers earthquake retrofitting of Anderson Dam to improve reliability and safety, and returns the reservoir to its original storage capacity.

  • New video shows Anderson Dam history and Seismic Retrofit Project scope

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    Please watch the video or click this link to view the new video about the history and scope of the Anderson Dam Seismic Retrofit Project.




  • Alternative Recreational locations

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    While the Anderson Dam Tunnel Project is under construction, large portions of the Anderson Lake County Park will remain open, including the Live Oak Picnic area, the Rosendin area, the Anderson Lake Park Visitor Center and the Coyote Creek Parkway. However, some areas of the park will be closed, impacting recreational activities such as angling, boating, hiking and picnicking around the dam and reservoir. These activities will be limited or completely closed.

    During construction, please check out these alternative recreational spots nearby:

    • Coyote Lake Harvey Bear Ranch County Park. Located just upstream of Anderson Reservoir, the park provides power and non-power boating, fishing, hiking, picnicking, nature trails, camping and biking opportunities around Valley Water's Coyote Reservoir.
    • Calero County Park. Boating, fishing, hiking and picnicking is available. The park surrounds the nearby Calero Reservoir.
    • Henry Coe State Park. Located about three miles east of Anderson Reservoir, the park is the largest state park in northern California and protects and preserves 87,000 acres of scenic hills and mountain ridges in the Diablo Mountain Ridge. The largely undeveloped park welcomes backpackers, equestrians, mountain bikers, day hikers and anyone seeking solitude in a nearly untouched setting.
    • Coyote Valley Open Space Preserve. This preserve offers a scenic overlook from the western edge of the Coyote Valley in addition to multi-use trails and picnicking areas.
    • Rancho Canada del Oro Open Space Preserve. Located in the foothills of the Santa Cruz mountains in South Santa Clara County, the preserve has 12 miles of easy to challenging trails. The multi-use trails are open to hikers, mountain bikers and equestrians.

    For a listing of city parks and trails, visit the Parks and Open Space page on the city of Morgan Hill's website.

  • Valley Water to hold May 19 virtual preconstruction meeting on the Anderson Dam Tunnel Project

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    The Anderson Dam Tunnel Project, the first part of the federal emergency order to speed up construction of a replacement dam, is targeted to begin in June 2021. Valley Water will hold a virtual preconstruction meeting on May 19, 2021 from 6 p.m. to 8 p.m. Join by clicking on the Zoom link below to receive information about the upcoming work and neighborhood impacts.

    https://valleywater.zoom.us/j/81890640488

    Phone: +1 669 900 9128

    Webinar ID: 818 9064 0488

  • Virtual public meeting held for residents of the Borello Ranch Estates neighborhood

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    Valley Water hosted a webinar event to inform the residents about the upcoming tunnel construction at Anderson Dam and the impact on the neighborhood, which is located near the tunnel project. If you missed the meeting, you can view it on Valley Water's YouTube channel here.

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  • Anderson Dam Tunnel Project

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    Valley Water has lowered the water levels at Anderson Reservoir to 3 percent capacity in accordance to the FERC directive. This allows for the start of construction on the 1,700-foot long tunnel, up to 24-feet in diameter, on the left side of the dam looking towards the reservoir. The new tunnel will allow Valley Water to increase the amount of water that can be released by five times during an emergency. Construction is scheduled to begin summer 2021 and run through December 2023.

Page last updated: 31 August 2021, 16:38