I-5 - SB S Lucile St to Spring St - Pavement Repair - Complete October 2019


Between summer 2018 and fall 2019, contractor crews from MidMountain Contractors, Inc. rehabilitated 4-miles of southbound I-5 between Spring Street in downtown Seattle and South Lucile Street near Boeing Field. Crews replaced damaged concrete panels, ground the surface of the pavement in all lanes to eliminate ruts, repaved several on- and off-ramps and repaired the gate at the south end of the I-5 express lanes. 

How you benefit

Before this project began, the pavement on this stretch of southbound I-5, and the southbound collector-distributor, was worn, rutted and cracked. Rehabilitating the roadway extends the useful life of this section of the interstate. It also creates safer and improved driving conditions for the tens of thousands of travelers who use this stretch of I-5 each day. 

  • Preservation: Replacing broken concrete panels, grinding to eliminate ruts and repaving ramps improves the driving surface and extends the lifespan of I-5.
  • Safety: Eliminating ruts limits the opportunity for water to collect on the roadway, which can reduce traction for drivers.
  • Economic: Replacing broken concrete panels, grinding the lanes and repaving ramps preserves the interstate and reduces the need for costly emergency repairs.

This project is part of a multi-year effort to preserve I-5 through King County.


The total project cost was $11.1 million.


Northwest Region Communications
15700 Dayton Avenue North
Seattle, WA 98133