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The SECRET $4BN Tunnel Network Under Chicago - #29

The World's Best Construction Podcast

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The 3.5 Billion Pound District in London

A new 3.5 billion pound district has been proposed for London. A 175 kilometer network of tunnels underneath Chicago is being built to help the city combat flooding. The world's first brownie was baked there in 1893. What do you think about this? Send us your thoughts at theb1m.com.

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