KNTV NBC Bay Area News At 6 January 26, 2018
Reporter thats brian mulroney, caltrans chief engineer on the project. He says engineers allowed 3 4 inch of rust over the years. But he says something besides rust is eating away at the bridges foundation. They also have questions about are there very small microorganisms that are feeding on iron. And thats kind of a new bring in the bridge world. Reporter the process is called microbiologically influenced corrosion. It turns out that the bay floor is rich with the tiny creatures that cause it....
Source: archive.org