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With final piece of roadway in place, the SR 99 tunnel begins to take shape
It’s been almost a year since Bertha the tunnel-boring machine completed its job drilling the tunnel that will eventually replace the State Route 99 Viaduct, and in the drill’s wake, crews have been busy building a road. Now, that work is largely done—although there’s still plenty of work to do getting the tunnel ready for cars.
Crews have been assembling 1,152 panels (made offsite by Tacoma Concrete Tech) that make up the lower, northbound deck since November. Yesterday, the last piece of that road was placed, marking the completion of both the north and southbound roads.