SEATTLE — A machine that had been digging a highway tunnel underneath Seattle likely won’t begin working again for another six months, an official with the contractor said Friday.
But Seattle Tunnel Partners project manager Chris Dixon said that estimate is “slightly optimistic.”
The machine, dubbed Bertha, stopped working in early December about 1,000 feet into the 1.7-mile Highway 99 tunnel. If the six-month estimate holds, Bertha will have been stopped for nine months.
“This isn’t the time to accelerate things or take short cuts,” Dixon told reporters Friday.
Dixon said the Japanese company that built Bertha will finalize a report on their options to access Bertha in about 10 days. Those options have been narrowed to three shafts of different sizes that will allow crews to reach the machine. Depending on the size of the shaft, crews will be able to take apart sections of Bertha and work on them either at the bottom of the shaft or at the street surface. Those are the details the team from Hitachi-Zosen will be exploring.