Impossible Engineering S7E2: World's Toughest Tunnels
- Aired: 2020-01-08
- Time: 21:00:00
- Runtime: 60 minutes
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Overview
A team of engineers is overhauling London's underground infrastructure to build a world-class super-sewer system, the Thames Tideway Tunnel. Using cutting-edge tech and the latest construction methods, they work to transform a centuries-old network into a modern-day masterpiece.