And it leaks

Massachusetts residents got a shock when state officials, at the peak of construction on the Big Dig project, disclosed that the price tag had ballooned to nearly $15 billion. But that, it turns out, was just the beginning.

Now, three years after the official dedication of the Central Artery/Third Harbor Tunnel, the state is reeling under a legacy of debt left by the massive project. In all, the project will cost an additional $7 billion in interest, bringing the total to a staggering $22 billion, according to a Globe review of hundreds of pages of state documents. It will not be paid off until 2038.

Contrary to the popular belief that this was a project heavily subsidized by the federal government, 73 percent of construction costs were paid by Massachusetts drivers and taxpayers.

[From Big Dig's red ink engulfs state - The Boston Globe]