WSDOT posted that miscellaneous tunneling-machine-operations-in-progress video this afternoon to go along with the news that the machine is out of the “access pit” and “is now tunneling in Seattle soil after breaking through the access pit wall late Wednesday. Seattle Tunnel Partners has mined 73 feet and installed 12 concrete tunnel rings since Bertha first moved forward in the pit on Dec. 22. More mining is scheduled to occur this week. Now approaching South Main Street, near Pier 48, Bertha is digging well below the area’s notorious fill soil. The top of the machine is approximately 80 feet below the surface in a mixture of glacially compacted material.” That’s from the newest WSDOT update, which you can read in its entirety here. WSDOT also has set up a new tunnel-machine-tracking page. If all goes well from here, they’re still heading toward a March closure of the Alaskan Way Viaduct “for about two weeks” while tunneling under the structure. Speaking of The Viaduct, WSDOT adds that crews are starting to take apart the big red crane that’s been alongside it during the tunneling-machine-repair process.
West Seattle, Washington