Corrosion plagues new Bay Bridge span

“The Bee compared that Caltrans study against about 115,000 pages of construction and inspection records and found the conclusions were based on wrong information. The records show that the agency misstated in its report the extent of water contamination and its own inspection efforts. Conclusions that corrosion caused no harm were based partly on underestimates about how long tendons were left exposed and vulnerable, and on suspect testing methods.”