Big Dig is the unofficial name of the Central Artery/Tunnel Project (CA/T), a massive undertaking to reroute the Central Artery (Interstate 93), the chief controlled-access highway through the heart of Boston, Massachusetts, into a 3.5 mile (5.6km) tunnel under the city, replacing a previous elevated roadway. The project also included the construction of the Ted Williams Tunnel (extending Interstate 90 to Logan International Airport) and the Zakim Bunker Hill Bridge over the Charles River.
The Big Dig is the single most expensive highway project in American history. Although the project was estimated at $2.5 billion in 1985, when the last major highway section opened in December 2003, over $14.6 billion had been spent in federal and state tax dollars as of 2006. The project has been replete with delays, arrests, escalating costs, leaks, poor execution and use of substandard materials. The Massachusetts Attorney General is demanding contractors refund taxpayers $108 million for "shoddy work."
The tunnel segment under south Boston which connects the mainline of I-90 to the Ted Williams tunnel is closed indefinitely in response to the July 10, 2006 collapse of a ceiling section that killed a woman riding as a passenger in the tunnel.
More on [ Big Dig ]
Massachusetts :: United States
Transportation :: Boston

The Big Dig - Official project site by the Massachusetts Turnpike Authority. Includes photos, maps, schedule, and engineering details.
opens to public - Associated Press article on the opening ceremony. Includes video.
Meta Description: [ The hulking highway that has marred Boston's landscape for more than four decades carried its last car Saturday as it was replaced - five years late and billions over budget - by a tunnel routing Interstate 93 under downtown Boston. ]
Boston Central Artery/Tunnel History - Includes maps and plans.
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Bridging the Big Dig - Photograph series of the Leonard P. Zakim Bunker Hill Bridge from The Christian Science Monitor.
Meta Description: [ The Christian Science Monitor - an independent daily newspaper providing context and clarity on national and international news, peoples and cultures, and social trends. ]
The Big Dig - Explores project history, quiz, comments from the people involved, and links to related sites.
Meta Description: [ Get HistoryChannel.com's inside story behind Boston's new underground and underwater highway project. Everything from engineering challenges to Big Dig trivia and resources about the most complex public works project ever undertaken in the United States. ]
The Big Dig, an Astrology, Prophecy and New Age Analysis - Argues that the project relates to worldwide events in some mystical way. Includes some construction photos.
Yet Another Big Dig Web Page - Photos of the project in Boston.
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