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A Look at Tunnels from End to End

Avigail Sharer and A. Samson

A tunnel can be as humble as the hole in the earth made by a wriggling worm, or so long that it would take a speeding car over half an hour to drive through. Let’s take a look at some impressive tunnels around the world.

Wednesday, November 02, 2011

Eisenhower–Johnson Memorial Tunnel

Clear Creek County, Colorado

“We were going by the book, but the mountain couldn’t read,” said one engineer during the long, costly construction of this four-lane vehicular tunnel (for cars and trucks) through the Rocky Mountains. When engineers hit upon shifting fault lines, emergency measures had to be taken to stop the tunnel from caving in. Though the project was supposed to take three years, it actually took five. It was completed in 1979.

At 11,158 feet, the Eisenhower Tunnel is one of the highest in the world. At 1.7 miles (2.7 kilometers), it’s also the longest mountain tunnel in the US Interstate system. It cuts under the Continental Divide, the point at which bodies of water that drain into the Pacific are divided from the bodies of water that drain into the Atlantic.

 

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