When North America's largest tunnel-boring machine pushed a 50-ft-long, 8-in.-dia steel pipe seven feet out of the ground on Dec. 3, joint-venture contractor Seattle Tunnel Partners and Washington ...

As with any task, if there’s more than one way to do it, then you should explore all of your options before forging ahead. This holds true in the world of utility construction. For years now, ...

On Saturday, a tunnel boring machine (TBM) so large that it looks like something out of Thunderbirds was dedicated in the city of Seattle. “Bertha,” as it’s known, is the world’s largest TBM and will ...

A tunnel boring machine is making steady progress under Hampshire on a major water infrastructure project. The machine, named Ancasta, is part of Southern Water’s Southampton Link Main scheme in ...