Though it took more than 10 years to complete and ran US$5 billion over budget, engineering experts warn that the eastern span of the Bay Bridge in San Francisco could be highly susceptible to corrosion.

Speaking before the California state Senate Transportation and Housing Committee, a panel of six engineers said a definite proportion of the bridge’s rods and bolts suffered from an excessive susceptibility to corrosion, and that some of the span’s tendons had already become corroded. The panel warned that some 2,000 rods and…