Thanks for presenting an angle I didn’t think of: that the cables (whether all or some) weren’t tensioned AT ALL before the span was placed.
I’ve read a bit, and understand that the tendons are tensioned while the concrete is partially cured.
And, I could understand hypothetically that they might have been checking the cable tension, and/or possibly bringing it up to spec. Maybe an anchor pulled.
But, if they were tensioning the cables for the first time after placing the span, that strikes me as truly idiotic. Without tensioning before elevation, you’d essentially have a long concrete, weak, partially cured span with inadequate reinforcement and no tension. Who would authorize that?
Perhaps the construction technique of tensioning after installation (if that’s what happened) should get its own acronym. I suggest changing ABC to mean “Accelerated Bridge Collapse.”
That's Miami construction in a nutshell.
Sweat the details and miss the big picture entirely.