Caltrans is considering replacing all 288 bolts on the $6.4 billion eastern span of the San Francisco–Oakland Bay Bridge in California after at least 30 of them snapped. The bolts are between 9 and 17 feet long and about 2.5 inches in diameter. "It appears to be a type of materials problem -- the presence of hydrogen in the metal," said Tony Anziano, Toll Bridge program manager, who is "pretty confident" it's not a design issue. It is unclear how long replacing the rods would take, but the new bridge is safe and still scheduled to open the day after Labor Day, Caltrans said.

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