Watch: If only Bertha could move this fast
Jul 10, 2015, 8:38 AM | Updated: 9:22 am
Crews finished installing four 40-foot-tall ventilation stacks at the south end of the Seattle’s State Route 99 tunnel project and released a time lapse video to prove it.
The new yellow stacks, installed atop the south portal operations building, can remove 1.4 million cubic feet of air per minute, according to the Washington State Department of Transportation.
Related: No new information on Bertha, project timeline not released when promised
Similar stacks will be added to the north portal operations building.
Meanwhile, there’s still no update on repairs to Bertha, the world’s largest tunneling machine, but WSDOT said Seattle Tunnel Partners has provided them a new schedule. WSDOT will release new information after reviewing the schedule.
