Back in perhaps more hopeful times … (seattlepi.com file photo) The state Department of Transportation decrees that digging is back on at the viaduct replacement tunnel. No, Bertha is not working again. Crews are just allowed to keep digging the access pit that’s opening up in an effort to figure out how to fix Bertha, which was damaged and halted a year ago after hitting a pipe left there by WSDOT years earlier.