THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING

Thawing land has some unsettled

For Big Dig, soil was frozen; as it warms, costly steps required

By David Abel
Globe Staff / February 5, 2010

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It was among the more daunting feats required to complete the Big Dig. Fourteen years ago, as engineers sought to extend the Massachusetts Turnpike to the Ted Williams Tunnel, they froze large swaths of the clay soil that surrounds South Station, allowing tens of thousands of rail riders to continue using the trains running through the area. (Full article: 520 words)

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