All northbound SR 99 lanes will close across the First Avenue South Bridge from 5 a.m. Saturday, Aug. 15 to 11:59 p.m. Sunday, Aug. 16, and again from 5 a.m. Saturday, Aug. 22 to 11:59 p.m. Sunday, Aug. 23, for maintenance, according the the Washington State Department of Transportation (WSDOT).

The following ramps will also close for the duration of the closure:

  • The First Avenue South on-ramp to northbound SR 509.
  • The Occidental Avenue South on-ramp to northbound SR 509.
  • The South Holden Street on-ramp to northbound SR 99.
  • Northbound SR 99 off-ramp to South Michigan Street.

Northbound SR 509/SR 99 traffic will exit at South Cloverdale Street and follow a signed detour during the weekend closures.

Washington State Department of Transportation bridge maintenance crews will make bridge deck repairs during the weekend closure.

Real-time travel information is available via the WSDOT mobile app, the WSDOT travel map or by signing up for WSDOT’s email updates.