Bertha, Seattle’s tunnel machine, achieved what officials called “a significant milestone” on Thursday when it broke through a 20-foot-thick concrete access pit wall into a shaft so that it can be pulled out and repaired.
Bertha has reached her goal
Bertha is on the move.
State transportation officials gave Seattle Tunnel Partners the OK on Tuesday to resume excavation on a pit being dug to reach and repair Bertha, the broken tunneling machine.
City and state transportation officials closed a street adjacent to the Alaskan Way Viaduct Replacement Project in Seattle because a portion of the road was cracked and sinking
Workers have stopped digging the pit to rescue the stalled boring machine for a tunnel under downtown Seattle.
The new tunnel would allow workers to dig up and repair the now-stuck boring machine
Bertha, the machine boring the State Route 99 tunnel in Seattle, will not resume digging until the end of March 2015 and that the tunnel will not open until November 2016, according to the Washington State Department of Transportation.
It seems that everything connected with the effort to dig a highway tunnel under downtown Seattle is big — from the tunneling machine that stopped working last December, to a large plywood wall planned to shield neighbors from the noise of repairing the machine.
An official for the contractor boring the Seattle Highway 99 tunnel says a six month delay in the stalled construction is a “slightly optimistic” forecast.