More often than you'd think, depends on how you judge the severity of these relative to the I-35 collapse, but on a human life scale there have certainly been m

More often than you'd think, depends on how you judge the severity of these relative to the I-35 collapse, but on a human life scale there have certainly been many in the last couple decades: https://en.wikipedia.org/wiki/List_of_bridge_failures https://en.wikipedia.org/wiki/List_of_bridge_failures