"Professional engineers are looking at this thing and when they're ready to give us their report, I think the public will be satisfied," Brown told reporters in West Sacramento outside a memorial for fallen Highway Patrol officers.
Concerns about the integrity of the bridge were raised earlier this year when state officials revealed that more than 2,300 bolts of a type that have been banned from use on bridges because they were deemed too brittle were used to construct the new eastern span of the Bay Bridge, which connects Oakland and San Francisco.
Earlier this year, 32 of 96 bolts installed in 2008 cracked when they were tightened by construction workers. Subsequent tests on hundreds of other bolts have shown no sign of failure.
Brown was fatalistic about the developments.
"I don't know if it's a setback," he said. "I mean, look, [stuff] happens … I'm optimistic until proven otherwise."