Your math needs some tweaking.
The official planning phase started in 1982; the construction work was done 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.
http://en.wikipedia.org/wiki/Big_Dig
Not really. Work in earnest didn’t start until 1994, and was substantially complete in 2003.
Even so, there has never been a construction project like it on the planet, clearly you have no clue as to the scope of work accomplished.
Yeah, the initial estimate was a joke, and Bechtel’s management was disgusting, but it was an incredible and necessary undertaking.