Local Information

Alaskan Way Viaduct to close this weekend for a semiannual inspection

Friday, February 26, 2016 - 10:32

Laura Newborn, Alaskan Way Viaduct Replacement Program communications, 206-805-2871; 206-639-8577 (mobile)


Sunday’s Hot Chocolate run will also close SR 99 north of the Battery Street Tunnel

SEATTLE – March is almost here - which means it's time for the semiannual inspection of the State Route 99 Alaskan Way Viaduct. This coming weekend, March 5 and 6, bridge inspectors from the Washington State Department of Transportation will close the viaduct for their twice-yearly inspection of the roadway. While the viaduct is frequently monitored, these twice-yearly inspections require a weekend closure so crews can scrutinize the bridge. During the closure they will measure existing cracks and look for new ones. They will also check for structural movement and examine the viaduct's foundations.

Both directions of the Alaskan Way Viaduct will close between South Spokane Street and the north end of the Battery Street Tunnel. Drivers should plan ahead and be prepared for additional congestion as a result of this closure.

In addition to the inspection closure, the annual Hot Chocolate 15k/5k Run will require a closure of SR 99/Aurora Avenue North on Sunday morning.


6 a.m. to 6 p.m. both Saturday, March 5, and Sunday, March 6

  • Alaskan Way Viaduct closed between South Spokane Street and the Battery Street Tunnel

6 a.m. to noon, Sunday, March 6

  • SR 99/Aurora Avenue North will close in both directions.
  • Northbound lanes will be closed between the Battery Street Tunnel and N. 47th Street.
  • Southbound lanes will be closed between the Battery Street Tunnel and N. 38th Street.

Drivers can check the Seattle Department of Transportation's traveler information page for updated information on the closure as well as WSDOT's travel tools for information about traffic in the Puget Sound region.


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