Services: Website, Public Involvement Planning, Inclusive Outreach, Door-to-door, Construction Communications, Community Outreach, Communications

45th St. Viaduct Approach Replacement

The Northeast 45th Street Viaduct is a major east/west thoroughfare in Northeast Seattle that connects Interstate 5 and the University District to Northeast Seattle neighborhoods, University Village, UW parking lots and athletic facilities, Seattle Children’s Hospital and businesses along Sand Point Way NE. On average, more than 20,000 vehicles use the viaduct every day.

The project scope included replacement of the west approach of the NE 45th Street Viaduct with mechanically stabilized flowable fill walls, relocation of a combined sewer overflow line, improved drainage, and the reconstruction of a segment of 45th to a new grade that improved sight distance. Work also included asphalt planing and resurfacing, pavement base repair, new curb ramps and retrofits, sidewalk repairs, channelization, and utility adjustments.

As part of the construction the viaduct was closed for more than 80 days and a major vehicle, bicycle and pedestrian detour was established. During viaduct closure the contractor worked 7:00 am to 11:00 pm, seven days a week.

S&A coordinated the communications and outreach to project area residents, businesses, employees, local organizations and other stakeholders to ensure no surprises and minimize construction impacts.