New Clues on Cause of Retaining Wall Collapse in New Jersey Highway Construction

Construction began in the summer of 2013 and the expected completion date is now 2028.

New Jersey’s Department of Transportation still has not determined what caused the late March collapse of a retaining wall on the massive Camden County construction project to connect Interstates 295 and 76 to Route 42.

There are some potential clues.

Heavy rain on top of high groundwater in the embankment where the wall was built, in Bellmawr, may have contributed to the March 25 incident, the state’s transportation commissioner said in a letter to a local state lawmaker last month.

After the retaining wall collapse, the interchange will likely surpass Boston’s Big Dig as the lengthiest highway project in the United States.

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