Crews are now drilling a launch pit to hold the massive tunnel-boring machine for the Alaskan Way Viaduct Replacement project. The project will be using the largest diameter tunnel boring machine ever ...
The 900,000-pound machine that started boring a gargantuan sewage and stormwater tunnel under Seattle in 2021 at last burst into the open this month, completing its rocky 2.7-mile route in just under ...
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