How An Epic Error Caused The Flooding In Chicago | Massive Engineering Mistakes

In 1992, basements and the underground Chicago Pedway throughout the Chicago Loop was flooded with an estimated 250 million US gallons of water. The remediation cost the equivalent of $2 billion nowadays, but what was the epic engineering mistake that caused the flood? 🇬🇧 Viewing from the UK? Watch this full episode of Massive Engineering Mistakes here: https://bit.ly/38yiQcE Subscribe to Quest TV for more great clips:    / subscription_c.  . Follow Quest on Twitter:   / questtv                 Watch Quest on Freeview 17, Freely 18, SkyQ and Sky+ 140, Sky Glass & Stream 140, Sky Scotland 141, Sky ROI 140, Sky Glass & Stream ROI 145 , Virgin Media 128, Virgin Media Scotland 137.