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BUILDING BIG Image with 5 links within the image.
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Tunnel Basics
BUILDING BIG Home Page BUILDING BIG Site Map BUILDING BIG Labs BUILDING BIG Databank BUILDING BIG Glossary
Bridges
Domes
Skyscrapers
Dams
Tunnels
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Tunnel boring machine
Used to carve New York Third Water Tunnel

Image of Tunnel Boring Machine
New York City Department of Environmental Protection

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