Viaduct inspection closure set for this weekend, March 5 and 6

Posted on Feb 25 2016 4:09 PM

Post updated March 5 at 5:30 p.m. 

UPDATE 5:30 P.M. MARCH 5: The semiannual inspection of the State Route 99 Alaskan Way Viaduct is now complete and the viaduct is open to traffic for the rest of the weekend. 

Drivers should be aware that the annual Hot Chocolate 15k/5k Run will close SR 99/Aurora Avenue North Sunday morning, March 6 from 6 a.m. to noon. The closure starts at the south end of the Battery Street Tunnel and ends just south of the Woodland Park Zoo. 

March is here, which means it’s time for the semiannual inspection of the Alaskan Way Viaduct. On March 5 and 6, WSDOT bridge inspectors will close the viaduct so they can inspect 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 on both Saturday, March 5 and Sunday, March 6. Drivers should plan ahead and be prepared for additional congestion as a result of these closures.
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, March 6. 

Closure Details

Alaskan Way Viaduct inspection closure
6 a.m. to 6 p.m. both Saturday, March 5, and Sunday, March 6
  • The Alaskan Way Viaduct will be closed between South Spokane Street and the north end of the Battery Street Tunnel.
Hot Chocolate Run closure
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 North 47th Street. 
  • Southbound lanes will be closed between the Battery Street Tunnel and North 38th Street.
Note to Sounders fans
The Sounders have a match at 4 p.m. this Sunday. WSDOT bridge inspection crews will work to reopen the viaduct as soon as possible, but there is a possibility it could remain closed until 6 p.m. Sounders fans headed to the game should stay engaged, have backup plan and check WSDOT’s Seattle Area Traffic webpage before they leave home.  
You can also 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.
More about viaduct safety
Read our viaduct safety fact sheet (pdf 2.9 Mb) to learn more about what we do to keep the viaduct safe and open to drivers until the tunnel project is complete.  
Viaduct inspection
Survey crews walk the viaduct during a previous inspection.