Troubled Mare Island bridge repairs hit another snag as broken part delays work

by Griffin Jones, Bay City News October 22, 2026October 21, 2026

The Mare Island Causeway Bridge spans the Napa River between Mare Island and Vallejo in an undated Google Maps aerial image. The nearly 70-year-old structure has suffered a series of mechanical issues in recent years and remains partially closed while crews try to repair a broken metal coupling used to raise and lower the bridge for boat traffic. (Google image)

Another mechanical issue is holding up repairs to a historic drawbridge connecting Mare Island and Vallejo, the city said Wednesday.

The Mare Island Causeway Bridge has been partially closed to traffic for over a year while crews work to upgrade the ailing structure, which was built in 1934.

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