SR 99 – Roy Street to N. 145th St. Paving & ADA Compliance

Project Type





Owner: WSDOT
Start Date: July 2018
Materials Used on Project and Quantities: 290,000 SY of Planning Bituminous Pavement and 30,000 Tons of HMA. 

In 2018, WSDOT and ICON began a project to rehabilitate all lanes of SR 99 between Roy Street and N 145th Street in Seattle. This diverse stretch of roadway fluctuates wildly from residential to commercial, is a major thoroughfare between many of Seattle’s stadiums and other prized venues, and has not been paved since 1999. As a result, it was cracking, failing, and delaminating. The project consisted of replacing 50 ADA ramps, upgrading 17 signal systems, constructing 17 concrete bus pads, 7 miles of 0.15’ mill and fill for all lanes in each direction, rehabilitation of 5 bridge decks, and new pavement markings. A total of 42 lane miles was preserved.