Building the new Midtown Tunnel between Norfolk and Portsmouth is one of the more spectacular engineering feats ever attempted in Virginia. Elizabeth River Crossings (ERC), the private-sector partner in charge of the $1.5 billion construction project, has to dredge a 95-foot-deep trench in the Elizabeth River, float 11 massive concrete tubes the length of football fields down from Sparrows Point Md., submerge them, and then place them together within one-inch tolerances in order to snap them together.
The tunnel, only the second in the nation to be constructed in this manner, is engineered to withstand the weight of a Nimitz-class aircraft carrier. Virginia Business has the story.
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