Big Dig

Massachusetts

State replacing faulty nuts in Big Dig tunnel system

BOSTON — Highway officials have found a widespread problem of cracked construction nuts within the Big Dig tunnel system, leading workers to inspect more than 100,000 nuts, Highway Administrator Tom Tinlin disclosed Wednesday. Hundreds of deficient nuts have been identified through the system, though officials said there are no safety

Massachusetts

Costs balloon on Green Line Extension, a Big Dig legacy

The Green Line Extension, one progeny of Boston's $15 billion Big Dig, took on a starker resemblance this week to its figurative parent when its estimated cost ballooned by as much as 50 percent. The latest update from the Massachusetts Bay Transportation Authority shows the extension may consume