A sinkhole that has closed all eastbound lanes of Interstate-80 through a stretch of New Jersey since last week will take an additional three weeks to assess and repair, an official said Monday.

The stretch of I-80 eastbound through Wharton will remain closed with a detour route as the Department of Transportation continues with repairs. The DOT offered no estimate as to when the highway would be fully open.

The eastbound lanes of Route 80 are expected to remain closed for at least another three weeks to get to the root cause of two sinkholes that have opened up in the past two months.