Chicago flood

The Chicago flood occurred on April 13, 1992, when repair work on a bridge spanning the Chicago River damaged the wall of an abandoned and disused utility tunnel beneath the river. The resulting breach flooded basements, facilities and the underground Chicago Pedway throughout the Chicago Loop with an estimated 250 million US gallons (1,000,000 m³) of water.^[1] The remediation lasted for weeks, and cost about $2 billion in 1992 dollars, equivalent to $4.34 billion in 2023. The legal battles lasted for several years, and disagreement over who was at fault persists to this day.