Alaskan Way Viaduct Replacement Construction Closures – Highlights for Monday, June 11 – Monday, June 18

Visit WSDOT’s website for a complete list of closures. Closure information changes frequently, so remember to check for updates throughout the week.

Highlights for Monday, June 11 – Monday, June 18

Corridor-wide closures:

  • The southbound SR 99 Alaskan Way Viaduct will close between the north end of the Battery Street Tunnel and the West Seattle Bridge from 9 p.m. to 5 a.m. Monday through Thursday. The on-ramps from Elliott Avenue and Columbia Street to southbound SR 99 also will close from 9 p.m. to 5 a.m.
  • Both directions of the SR 99 Alaskan Way Viaduct and all on- and off-ramps will close between the West Seattle Bridge and the north end of the Battery Street Tunnel from 11 p.m. Friday, June 15 to 5 a.m. Monday, June 18.
  • These closures are necessary while crews reinforce a two-block section of the viaduct located above the route of the future SR 99 tunnel.

North end:

  • Flaggers will alternate traffic on Thomas Street between Sixth Avenue North and SR 99 from 7 a.m. to 5 p.m. Monday through Friday for utility work.
  • Sixth Avenue North will close between John Street and Thomas Street from 7 a.m. to 7 p.m. Monday through Wednesday for utility work. Local access will be maintained via Thomas Street.
  • Sixth Avenue North will close between Thomas Street and Harrison Street from 7 a.m. to 5 p.m. Thursday and Friday for utility work. Local access will be maintained via Harrison Street.
  • John Street will close between Sixth Avenue North and SR 99 from 7 a.m. to 7 p.m. Thursday and Friday for utility work. Alley access will be maintained. Local access will be maintained via Sixth Avenue North.

Central waterfront:

  • Flaggers will alternate traffic in the intersection of Yesler Way and the road under the viaduct from 9 p.m. to 5 a.m. Monday through Thursday.

South end:

  • East Marginal Way South will close from South Atlantic to South Hanford streets from 7 p.m. to 5 a.m. Monday through Friday while crews set girders for the new northbound SR 99 bridge over South Atlantic Street. Local access will be maintained.
  • South Atlantic Street will be closed west of Colorado Avenue South from 7 p.m. to 5 a.m. Monday through Friday.

Quick links:

Website links

Alaskan Way Viaduct Replacement Program

SR 99 Tunnel Project | South Holgate Street to South King Street Project