Firms to oversee height increase for California’s San Vicente Dam

San Diego County Water Authority awarded a $28.5 million contract for design review and construction management of a project to add 117 feet to the 220-foot-tall San Vicente Dam in Southern California.

SDCWA awarded the contract Sept. 3 to joint venture partners Parsons, a provider of technical and management services, and Black &Veatch, an engineering, consulting, and construction company. Design work will continue through 2009. Construction is scheduled to be complete in late 2012.

The dam heightening project is one component of the water authority’s massive $1.2 billion Emergency Storage Project, which is expected to provide up to six months of water if a natural disaster such as an earthquake cuts off the region’s imported water supplies.

The Parsons/Black &Veatch team has experience with other aspects of the Emergency Storage Project, including work on a pump station to help move water from San Vicente Reservoir to one of the water authority’s aqueducts.

SDCWA plans to seek bids for various aspects of the project in October 2008 and in 2009 and 2010. (HNN 7/22/08)

The water authority board endorsed a $568 million proposal using roller-compacted concrete to increase the height of the concrete gravity structure. It expects to create 152,000 acre-feet of additional storage for emergency water supply and to increase reliability and flexibility of the region’s water supply. The existing dam can store 90,000 acre-feet.

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