Probably designed by the same geniuses who designed that pedestrian bridge in Florida.
The concept was sound. The execution was at fault. The two main portions of the pedestrian bridge was meant to be supported by cables from a central tower. They put up half of it counting on the rigidity of the span to be enough support until the second span and supporting cables could be put in place. They were horribly wrong with deadly consequences.
Good lord i could have built a better bridge with an erector set ! that first set of pylons sunk and dropped the bridge who engineers this stuff ? do they have an inspection corps ? since when do you build a bridge over water without core samples ?
i just wonder if they built it on top of a pipeline of some sort unless they just had a cavern cave in ? the river wasn’t inspected enough that’s for sure