Dragados USA, Inc.’s Post

After powering her way through the harbor, Mary The Tunnel Boring Machine's cutterhead has taken center stage, fully emerged from the newly bored tunnel and into the receiving pit at North Island. This heavy lift was a job too big for a crane. Instead, our innovative engineering teams and dedicated crews used nitrogen tables to raise, slide, and turn the massive tool 180 degrees into launch position. Now facing Norfolk in anticipation of boring the expansion's second tunnel, Mary's shield waits to be reunited with her trailing gantries which remain, for now, in the tube.