SEATTLE — Experts say they've at least partially solved the mystery of what's been blocking a massive tunnel-boring machine beneath downtown Seattle for the past month: a steel pipe. The $80 million, ...
The state should have done more to warn Seattle Tunnel Partners about a steel pipe that tunnel machine Bertha struck Dec. 3, 2013, three days before the giant drill overheated and stalled, a dispute ...
These Guided Boring Machines (GBM) install small-diameter pipes with grade and alignment precision. Launch and reception shafts strategically located to minimize surface disruption Three robust ...
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