According to a recently report, the worst bridge in the Bay Area is located on I-680 over Monument Boulevard in Concord.
That bridge is also in the top 10 in California of the most traveled on deficient bridges.
It was built in 1998 and about 235,000 people drive over it on average per day.
The report says about 7 percent of the nearly 26,000 bridges in California are structurally-deficient meaning it is in poor condition, after being rated by an inspector.