A worker walks on the bike path next to the new Bay Bridge Self-Anchored Suspension (SAS) tower on August 26, 2013 in San Francisco, California.
On Wednesday night the San Francisco-Oakland Bay Bridge closes. It will reopen next week with a new eastern span that took a quarter century and more than $6 billion to build. This all started with the Loma Prieta earthquake of 1989, when a section collapsed, revealing the long overdue need for a seismic upgrade. We talk to San Francisco Chronicle reporter Jaxon Van Derbeken to learn more. Reporter: Rachael Myrow