Large Diameter Hayward Fault Seismic Retrofit

alameda county water district

$18.7 MM

The Large Diameter Hayward Fault Seismic Retrofit project's objective was to improve water system reliability by replacing aging infrastructure and improving seismic reliability.  Selected large diameter pipelines that cross the fault were upgraded with new pipe that is  better able to withstand a large fault offset. Higher grade steel and thicker pipe walls will help maintain the pipes’ pressure integrity.

Additionally, bypass manifolds were added to the pipes on each side of the fault. In the event of a pipe break, temporary bypass hoses can be deployed to bypass the break, and transmit water across the fault.







Contact Information

Corporate Office:

2810 Harbor Bay Parkway

Alameda, CA 94502

Phone: 510-632-7676

Oakland Regional Office

9009 Railroad Avenue

Oakland,  CA 94603

Phone: 510-632-7676

Sacramento Regional Office

1016 North Market Blvd. Ste 20

Sacramento, CA 95834

Phone: 916-372-8910

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