CONSTRUCTION: More paving planned for northbound I-5 this weekend


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WSDOT is waring drivers that they should be prepared for another weekend of lane reductions on northbound I-5 in SeaTac and Tukwila as paving work continues between State Route 516 and South 170th Street.

Contractor crews working for the Washington State Department of Transportation have two weekends of paving remaining on this #ReviveI5 project. Once that is finished, they will schedule four more weekends to replace expansion joints on northbound I-5 at Interurban Avenue and the Duwamish River.

Northbound I-5 will be reduced from five lanes to two lanes from 8 p.m. Friday, July 14, to 5 a.m. Monday, July 17.

  • Lane closures will start south of SR 516 on Friday night and north of Military Road starting at 12:01 a.m. Sunday.
  • Northbound I-5 will be reduced to one lane between 10:30 p.m. Friday and 5 a.m. Saturday.
  • From 8 p.m. Friday to 11:59 p.m. Saturday, the SR 516 and Military Road on-ramps and the South 188th Street off-ramp will be closed.
  • From 12:01 a.m. Sunday to 5 a.m. Monday, the Military Road on-ramp and the South 188th Street on- and off-ramps will be closed.

After this weekend, contractor crews will break for a few weeks because of major events in Seattle, including the Bite of Seattle, a big Seattle Mariners series with the New York Yankees and Seafair. They will finish paving the weekend of Aug. 11-14.

“We expect a lot of traffic into Seattle the last two weekends in July and the first one in August,” said WSDOT Traffic Engineer Mike Swires. “There are always events, but these weekends in particular will bring much larger than normal crowds, so we need to keep all lanes of northbound I-5 open.”

Paving progress
Contractor crews have completed four of the six weekends of paving. Last weekend they paved about 17,500 tons of asphalt – about 1,165 dump truck loads – on the three right lanes of northbound I-5 between SR 516 and South 170th Street. Starting Friday, July 14, they will pave an additional 12,000 tons of asphalt, about 800 truckloads. All five lanes will get a final layer of asphalt Aug. 11-14.

When complete, this section of northbound I-5 will have 8 inches of asphalt to support the weight of the more than 100,000 vehicles that use the interstate every day.

Expansion joint work coming
Once the paving is finished, the contractor crews will tackle expansion joints on the northbound I-5 Interurban Avenue overpass and the Duwamish River Bridge. This work will require four additional weekend-long lane reductions later this summer or fall. These have yet to be scheduled.

By next summer, northbound I-5 between South 260th Street and the Duwamish River will have four miles of new asphalt pavement, 440 new concrete panels and eight new expansion joints at Interurban Avenue and the Duwamish River. Also, concrete grinding will eliminate ruts on an additional five miles of the interstate.

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