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Tunnel-boring machine deployed for I-75 project
1/22/2021

A tunnel-boring machine named Eliza is digging underground as part of an effort by the Michigan Department of Transportation to update a section of Interstate 75. "Once a full ring of concrete liner is in place, hydraulic jacks within the front shield push against the completed wall segments to propel the TBM forward," department spokesperson Robert Morosi says.

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