Nine days after the last Highway 99 tunnel-machine update, WSDOT just published another one – but it still doesn’t answer the big question of when the Alaskan Way Viaduct will close so the machine can tunnel beneath it. The update goes into great detail about how crews are working in “hyperbaric” conditions, and includes this :34 video:

WSDOT has said it hopes to provide two weeks advance notice of the two-weeks-or-so closure, so at this point it would seem unlikely to start before mid-April. The state is continuing to add info to its special closure-info website at 99closure.org.

Today’s update also included a note that results of the March Viaduct inspection are available:

Survey crews measured approximately 5/16 of an inch of settlement near Seneca Street and between 1/8 and 1/4 inch of settlement at the Columbia Street on-ramp. Crews also observed upward movement of up to 1 inch at some locations at the south end of the structure. This upward movement is uniform in nature. No new cracking or structural damage was found.

That’s the entirety of the update published here.