Bridge Collapse

[xoxoxoBruce]

In the past, road salt has proven problematic for bridges. Because of the numerous bridges in this area, Indeed, I-95 through Philly is all bridge (elevated highway), I've been concerned about the caustic brines they have started routinely spraying in the last couple years.
When I read an automatic liquid deicing system was installed on this bridge six years ago, it aroused my suspicion because of prior concern.

tw is right in that it's wild speculation at this point and like I said, we won't know for a year, if ever, what caused this failure.