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 about $3 billion, up from an estimated $2 billion in January. While almost $1 billion in federal money has been pledged to the project, the state may be on the hook for the rest. T officials have begun to discuss killing the long-delayed plan, listing that course of action among their cost-cutting options.
BOSTON — The cost set by the Green Line Extension contractor for the first three stations is more than double the amount state and federal transit officials recently estimated, calling into question the full price tag of the new trolley line and whether the state can afford to build it.
