Gov. Gavin Newsom's $20 billion plan to build a massive, 45-mile long tunnel under the Sacramento-San Joaquin Delta to make it easier to move water from Northern California to Southern California won the endorsement of Silicon Valley's largest water agency on Tuesday.

The Santa Clara Valley Water District met Tuesday to consider whether to continue supporting Governor Gavin Newsom's controversial Delta water tunnel project.

Valley Water in the South Bay is set to vote Tuesday on whether or not to join other local water agencies in contributing to Gov. Gavin Newsom's Central Valley water tunnel project.