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Reply to "Is the author of this Short Video right?"

Took something like 12 years to construct, so I agree with ECR.

BTW when they start trying to "dig" something like this in NY City it isn't the same as when I lived in Southern WI.  When putting in a New High Pressure Natural Gas Pipeline, they just used some Big Backhoes.  Dug a trench, dropped in the pipe, weld the sections together and then backfilled it.

For those that haven't already studied it.  If you want to see something interesting and historical, look up information on when they went subterranean with NY Grand Central Terminal in the early 1900's.

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