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+ - Tunnel boring machine drills hole under Niagara Fa->

Submitted by abhatt
abhatt (1963474) writes "From the article:
The world's largest tunnel boring machine finished drilling a 10.2-kilometer (6.3-mile) long and 14.4-meter (47.2-feet) high tunnel under the Niagara Falls on Friday.

The 4,000-ton machine, known as Big Becky, had been drilling the tunnel under the world famous waterfalls since 2006."

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Tunnel boring machine drills hole under Niagara Fa

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