https://abcnews.go.com/US/engineers-failed-recognize-danger-fiu-bridge-inspection-hours/story?id=63657158
Snip..."The bridge was previously touted as an "engineering fear come to life" because it was built using a technique known as Accelerated Bridge Construction."
That bridge collapsed due to poor maintenance and inspection practices.
The accumulation of bird feces basically accelerated the deterioration of the steel members.
The engineers were schooled in new math