DIY Network

Underwater Tunnelling Machine

Episode DPEX-206H

Host Matt Blashaw helps bore a mile-long tunnel under the Allegheny River in Pittsburgh as part of the North Shore Connector, which is extending Pittsburgh's Light Rail Transit system. Using space-age technology, Matt helps assemble the walls of the subway tunnel, but, while he's there, the Tunnel Boring Machine hits an unexpected turn and is in danger of falling off its tracks. Matt must help the crew fix the broken part before the project is jeopardized.


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