Where did the dirt from the Big Dig go?

About two-thirds of the dirt went to landfills and other sites. Moving all that dirt took more than 541,000 truckloads. If all those trucks lined up end to end, they'd back up 4,612 miles. That's all the way to Brasilia, capital of Brazil, as the crow flies, or to the Panama Canal over land.



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Aggregate provided 60% of the concrete used to build the Big Dig. Indicted were: former general manager Robert Prosperi; dispatch manager Marc Blais; dispatch manager John Farrar; quality control manager McNally; district operations manager Gregory Stevenson; and dispatch manager Keith Thomas.

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With interest, the project could ultimately cost around $24 billion, finally getting paid off in 2038. Besides creating a financial nightmare, the Big Dig was plagued by huge constructional flaws – which obviously added fuel to the fiscal firestorm.

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Swiss engineer Christian Menn took over the design of the bridge. He suggested a cradle cable-stayed bridge that would carry ten lanes of traffic. The plan was accepted and construction began on the Leonard P. Zakim Bunker Hill Memorial Bridge.

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The Ted Williams Tunnel interface in East Boston between the land-based approach and the underwater section is 90 feet below the surface of Boston Harbor, the deepest such connection in North America. The project's seven-building ventilation system is one of the largest highway tunnel ventilation systems in the world.

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The Boston's Big Dig project replaced the elevated deteriorating six-lane elevated Central Artery (I-93) with an underground expressway beneath the existing road, extended the I-90 tollway underground to the South Boston Seaport and Logan International Airport, built a new 10-lane bridge over the Charles River, and ...

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Planning began in 1982; the construction work was carried out between 1991 and 2006; and the project concluded on December 31, 2007, when the partnership between the program manager and the Massachusetts Turnpike Authority ended.

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The Central Artery/Tunnel Project was the largest, most challenging highway project in the history of the United States. It reduced traffic and improved mobility in one of America's oldest, most congested major cities. It built a framework for continued growth in Massachusetts and New England.

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Perhaps ironically, the Blue Line takes several points of pride from its proximity to water, which gives it its name. Local historians claim the tunnel that runs under the harbor as the first underwater subway tunnel in the United States.

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It was originally a two-way road that carried traffic in both directions, until the opening of the parallel Callahan Tunnel in 1961. The tunnel is 8,448 feet long, of which approximately 3,960 feet are underwater. In 2017, the state removed the tollbooths as part of a switch to electronic tolling.

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