Video provided by Caltrans shows welding work has begun as crews replace the expansion joint with a state of the art seismic joint.The bridge was closed to all traffic on Friday night at 10 p.m. It's scheduled to reopen by 5 a.m. on Tuesday.
There are no more full closures for the Dumbarton Bridge. All of the seismic work is supposed to be wrapped up early next year.
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