SR 99 tunnel CLOSED this weekend

Thursday, June 6, 2019

SR 99 tunnel
Photo courtesy WSDOT
Seattle travelers will want to plan for a full SR 99 tunnel maintenance closure this weekend. 

WSDOT maintenance crews will close both directions through the tunnel from 10pm Friday, June 7, to 8am Saturday, June 8. 

Maintenance closures are usually scheduled in alternating directions each month, but this isn’t a standard maintenance check. we will also be updating the fire control system software.

This work requires deactivation of the fire control system, which is why no travelers can be in the tunnel.

Similar to previous maintenance closures, crews will also inspect the jet fans, cameras and overhead signs as well as sweep the roadway. The monthly maintenance closures allow crews time to assess the tunnel systems and keep up with the warranties.


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