expansion achieved a major milestone as its tunnel boring machine reached its destination. Nicknamed "Chessie," the tunnel boring machine broke through the receiving pit on Two Island at Thimble ...

Using a model of the tunnel boring machine (TBM), he explained that the final phase of debris removal was underway, and multiple teams were working continuously to expedite the process.

using the second tunnel boring machine (TBM) in a bid to complete the work. Officials said there were more fault zones and softer aggregate formations, such as the one that caused the collapse.