From Atomic Frontier.

The Chicago River is flowing backwards, rather than going downhill from inland Illinois into Lake Michigan instead it goes in the opposite direction. This isn’t some quirk of nature, but an engineering megaproject – indeed four engineering megaprojects – on a scale quite unlike anything else on Earth. So, what does it take to reverse a river?

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This video was brought to you by an unhealthy amount of coffee and our awesome Patrons at https://www.patreon.com/atomicfrontier.

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Hi, I’m James. I explore the world looking for interesting engineering stories which explore complex issues in interesting ways. I hold a First-Class Honors in Mechanical Engineering from the University of Western Australia and am currently studying a Masters of Space Systems Engineering at the Massachusetts Institute of Technology.

My website is https://www.atomicfrontieronline.com, I occasionally tweet from https://twitter.com/AtomicFrontiers, and you can join the Atomic Frontier Discord server to talk about cool engineering stuff at https://discord.gg/4QZc3jYdTR. You can help support my work and see some cool behind-the-scenes content at https://www.patreon.com/atomicfrontier.