Hundred year old infrastructure is not the most sturdy, obviously this structure was past the end of its design life (leading to its failure). Maintaining a st

Hundred year old infrastructure is not the most sturdy, obviously this structure was past the end of its design life (leading to its failure). Maintaining a structure doesn't prevent the concrete from spalling (as the chemical bonds that bind the concrete age and degrade), nor does it necessarily pick up on failing earthen tunnels in hard to inspect areas. Many bridges across the country are going on 100 years old, and have a ~50 year design life. Structurally they are deficient, often undersized for the modes of traffic using them, and structural failure (which is very possible) would likely kill people. US infrastructure needs heavy investment, rather than the neglect it has seen for decades.