The Dumbarton Bridge is a bridge that crosses the San Francisco Bay in California. It should be noted that it is one of the most southern road bridges. The eastern end of the Dumbarton Bridge is in the Fremont area near Newark in the San Francisco National Wildlife Refuge.
The west end of the Dumbarton Bridge is in Menlo Park. Dumbarton Bridge has three lanes on each side and also features a separate lane for cyclists and a footpath. Dumbarton Bridge connects State Highway 84.
It is managed and maintained by the California Department of Transportation and the Bay Area Toll Collection Authority.
Dumbarton Bridge, how it came about
The predecessor of the Dumbarton Bridge was built in 1927. It became the first bridge to cross the San Francisco Bay. Part of the bridge is used by fishermen. The original Dumbarton Bridge was built using private capital, after which it was bought by the state for $2.5 million in 1951.
Due to the fact that the predecessor of Dumbarton Bridge was built a very long time ago, it was decided to build a new bridge to the north. It was opened in 1982. In 1989, the structure of the original bridge was rebuilt. Due to the reconstruction, it became possible to accommodate six traffic lanes, and in 2003 the final expansion of the passages was completed.
Dumbarton Bridge technical parameters
The modern Dumbarton Bridge consists of more than just six vehicular lanes. Dumbarton Bridge features additional bike lanes and footpaths on the south side.
total length is 2.621 m;
the longest span is 103 meters;
the central span is 104 meters with a vertical clearance for ships of 26 meters;
material - concrete;
construction is double beam.
The central spans are reinforced double trapezoidal beams made of steel. The beams support the lightweight concrete deck. The bridge is also directly connected to Highway 880 and the freeway near the Fremont end to the north.