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December 17, 2014

State: OK to restart digging Bertha's pit

By MARTHA BELLISLE
Associated Press

State transportation officials gave Seattle Tunnel Partners the OK on Tuesday to resume excavation on a pit to reach and repair Bertha, the broken tunneling machine.

But officials still don't know whether the recently discovered ground settlement was caused by all the water being drained from under the pit, according to Alaskan Way Viaduct Replacement project spokeswoman Laura Newborn. Workers have been “de-watering” to reduce pressure from underneath and on the sides of the hole.


 
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