It was the world's biggest tunneling machine when it first chewed into the loose dirt and gravel on Seattle's waterfront in 2013. With a cutting head nearly 60 feet wide, it had been built in Japan and shipped across the Pacific to dig a two-mile-long double-decker highway tunnel under downtown.


am_Unition:

    At some point today, the 57.5-foot wide cutting head will gnash through the massive retaining wall on the north end of the tunnel, where a live video feed awaits to capture the moment — and perhaps the off-screen sound of engineers sighing with relief.

YO GET IN HERE, THIS THING IS DOIN' IT NOW

It's oddly satisfying to hear the crunching.

Edit: It's done now.


posted by thenewgreen: 198 days ago