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Big Dig ceiling collapse

The Big Dig ceiling collapse occurred on July 10, 2006, when a concrete ceiling panel and debris weighing 26 short tons (52,000 lb; 24,000 kg) and measuring 20 by 40 feet (6.1 by 12.2 m) fell in the Fort Point Channel Tunnel (which connects to the Ted Williams Tunnel) in Boston, Massachusetts, US.

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