Was the Big Dig project successful?

The result was a 62% reduction in vehicle hours of travel on I-93, the airport tunnels, and the connection from Storrow Drive, from an average 38,200 hours per day before construction (1994–1995) to 14,800 hours per day in 2004–2005, after the project was largely complete.



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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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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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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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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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The entire harbor is relatively shallow, on average less than twenty feet deep, and so to maintain its commercial viability it is routinely dredged in key areas to maintain suitable depth for large craft.

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Netherlands. In 1969, the Flevopolder in the Netherlands was finished, as part of the Zuiderzee Works. It has a total land surface of 970 km2, which makes it by far the largest artificial island by land reclamation in the world. The island consists of two polders, Eastern Flevoland and Southern Flevoland.

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