How about the Quebec bridge over St Lawrence River? it collapsed not once, but twice, both before the bridge was even complete, killing 88 persons in the process.
The first time the bridge was so badly designed its actually load carrying capacity is only a fraction of its own weight. So it fell apart in 1907 under its own weight while still being erected. Undaunted, the Canadians began bridge anew. The second time the bridge was not badly designed, but the construction method was flawed, and one span fell into the st. Lawrence as it was being installed, killing more people.
The first time the bridge was so badly designed its actually load carrying capacity is only a fraction of its own weight. So it fell apart in 1907 under its own weight while still being erected. Undaunted, the Canadians began bridge anew. The second time the bridge was not badly designed, but the construction method was flawed, and one span fell into the st. Lawrence as it was being installed, killing more people.
