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Engineers for $14.6 Billion Boston-Area Roads Project Eye Pipes in Tunnel Ice.
Knight Ridder/Tribune Business News, January, 2004
By Mac Daniel, The Boston Globe Knight Ridder/Tribune Business News
Jan. 13--Big Dig engineers, working furiously to solve the icing problem that stalled traffic in the northbound tunnel over the weekend, yesterday said that the ice was the result of the $14.6 billion project's drainage pipes freezing and began applying heat to them to prevent it from happening again.
Water has been seeping into the new tunnel through holes that hold steel supports for sections of the old elevated Central Artery. The water is usually removed by a trough and pump system alongside the underground roadway, according to Big Dig spokesman Sean O'Neill.
But the troughs and pipes in the deepest portion of the northbound tunnel -- about 120 feet below ground --...
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