Connecting San Mateo and Alameda Counties, the Dumbarton Bridge spans the narrowest part of San Francisco Bay, between Newark on the east shore and Menlo Park on the west. The existing structure is the second Dumbarton Bridge. The original, actually the first Bay bridge built for vehicles, was constructed by the Dumbarton Bridge Company in 1927, but by the 1940s it had become too congested and insufficient for the growing volumes of traffic. The new bridge was completed in 1984 and is 8,600 feet long, with a vertical clearance of 85 feet, made with steel box girder covered with pre-stressed concrete. A covered walkway over the tool booths connects the Coyote Hills Park and National Wildlife Refuge. The bridge has three lanes in each direction and a separate bike and pedestrian lane.
Newark, CA 94560
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