Collapse is such a harsh word. We construction guys prefer the term “sudden gravitational disassembly.”
As a construction guy, maybe you can appreciate what I noticed in the photos:
The erosion control is in place!
Sure, its a desert, but that doesn’t matter - the straw waddles are perfectly staked in place. Courtesy of an ever expanding interpretation of the 1973 Clean Water act. There have probably been inspectors to the site...not to check rebar...but to check the straw waddles.
And I see they had an OSHA approved wooden rail on their falsework. Everything in order.
Except important stuff like a water truck.
unplanned sudden gravitational disassembly.
LOL! You could even turn it into an acronym-- SGD, and say something like: The bridge didn't really collapse, it suffered from SGD Syndrome, and $56M more dollars will help isolate and prevent further occurrences.