Mercer Corridor Project
Weekly Construction Preview

This week, crews will continue sidewalk and landscaping work on Valley Street between Fairview Avenue North and Ninth Avenue North. Construction will also continue on the north side of Mercer Street between Fifth Avenue North and Dexter Avenue North and the east side of SR 99 between Valley and Harrison streets.

Activities this week include:

  • Begin nighttime single lane closures on  the I-5 on- and off-ramps at Mercer Street from 7 p.m. to 5 a.m. for approximately one week:
    • The far left lane on eastbound Mercer Street will be closed between Boren Avenue North and onto the I-5 on-ramps at Mercer Street. Two lanes onto the I-5 on-ramps will remain open at all times.
    • The far left turn lane from the I-5 off-ramps at Mercer Street onto Fairview Avenue North will be closed. One left turn lane onto Fairview Avenue North and all three through lanes onto westbound Mercer Street will remain open at all times.
    • Continue sidewalk restoration on Valley Street between Ninth Avenue N and Fairview Avenue North.
  • Continue installing poles and conduit for lighting on Westlake Avenue North and Valley Street.
  • Continue sidewalk work and conduit installation on the north side of Mercer Street between Warren Avenue North and Fourth Avenue North.
  • Continue installing dowels in the north retaining wall on Mercer Street between Fifth Avenue North and Dexter Avenue North.
  • Continue electrical work along the south side of Mercer Street between Eighth Avenue North and Dexter Avenue North.

Reminder: The next full weekend closure of SR 99 is scheduled for October 4-7 for construction activities associated with the West Phase of the Mercer Corridor Project. Please note, this closure is being coordinated with the Washington State Department of Transportation for their semi-annual inspection of the Alaskan Way Viaduct. SR 99 will be fully closed to traffic between Valley Street and the southern end of the Battery Street Tunnel. More information including detour information may be found at http://www.seattle.gov/transportation/mercercorridor.htm.

Traffic engineers will continue to:

  • Monitor traffic on Mercer Street, Fifth Avenue North, Broad Street and Ninth Avenue North.
  • Monitor traffic at the Westlake Avenue North and Mercer Street intersection.
  • Monitor traffic at the Ninth Avenue N and Mercer Street intersection.
  • Monitor traffic flow at the Dexter Avenue North and Mercer Street intersection.

For up-to-the-minute construction updates join our project email list at: http://www.seattle.gov/transportation/mercercorridor.htm or call the 24-hour construction hotline at 206-419-5818.