HIGHWAY 99 TUNNEL: 3rd maintenance stop of the year

While the Alaskan Way Viaduct is closed this weekend for its twice-yearly inspection, the machine digging its replacement will be taking a break for inspection too. WSDOT announced this afternoon that the Highway 99 tunneling machine has made its third maintenance stop of the year and will likely be stopped for about a month.


It’s currently stopped about 190 feet under First Avenue, north of Pike Street, and has now gone 4,721 feet, more than half the 9,270-foot tunnel route. You can read WSDOT’s update in full here; in short, crews will be inspecting and changing some of the machine’s 700+ cutting tools. This year’s two previous maintenance stops were March 12-April 29, just before the machine went under the Viaduct, and June 23-July 18. The newest schedule revision says the tunnel will open in early 2019.

P.S. Above ground, the Viaduct inspection closure is scheduled for 6 am-6 pm Saturday and Sunday. These often end early, and we’ll let you know if/when this one does.

2 Replies to "HIGHWAY 99 TUNNEL: 3rd maintenance stop of the year"

  • Doug October 7, 2016 (6:18 am)

    Why is this listed as only the third maintenance stop of the year? Wasn’t Bertha also stopped for a couple of weeks at the beginning of September? How was that stop different from this one?

  • John October 7, 2016 (9:28 am)

    I have enjoyed the precipitous drop in comments as Bertha continues without more major problems.

    People are beginning to realize and accept that this tunnel is becoming a reality.

Sorry, comment time is over.