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Mercer Corridor Project
Weekly Construction Wrap-Up

SR99 abutment construction

Crews worked on the south abutment of State Route 99 over Mercer Street.

mercer_logo_200This week, crews continued to work on grading and paving the roadway on Valley Street, Broad Street and Westlake Avenue North, north of Mercer Street. Crews also continued construction 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 included:

  • Began grading the south side of Roy Street between Dexter Avenue North and Ninth Avenue North in preparation for new asphalt.
  • Continued sidewalk work on the east side of Fourth Avenue North between Roy and Mercer streets.
  • Continued curb barrier installation and landscaping work along the I-5 on and off ramps at Mercer Street.
  • Continued building demolition at the southeast corner of Mercer Street and Dexter Avenue North.
  • Continued pavement removal and grading on Westlake Avenue North between Valley Street and Ninth Avenue North, on Broad Street between Ninth Avenue North and Westlake Avenue North, and on Valley Street between Terry Avenue North and Fairview Avenue North in preparation for rebuilding the roadway.
  • Continued to work on the abutments for the east side of the SR 99 overpass over Mercer Street.
  • Continued hydro blasting and installing dowels in the north retaining wall and footing on Mercer Street between Fifth Avenue North and Dexter Avenue North.

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 flow at the Dexter Avenue North and Mercer Street intersection.

For up-to-minute construction updates join our project email list at:  or call the 24-hour construction hotline at 206-419-5818.