The City of Shoreline is growing and changing. With the arrival of  new light rail and bus transit options at the future Shoreline South/148th Station and new development, residents need new ways to safely connect to these growing services and facilities and to an expanding pedestrian and bike network. To meet these needs, the City of Shoreline is building a new pedestrian and bike bridge crossing over I-5 at N 148th Street.

The bridge will provide a vital new pedestrian/bike connection over I-5 for people walking, biking, and rolling. The bridge will improve safety, reduce travel times, and improve access to regional transit at the future Shoreline South/148th Station.

Tree Impacts

There are four trees that will be removed in Phase 1, as many trees had already been removed in this vicinity as part of the Sound Transit Lynnwood Link Extension Project. This phase of the project does not include trees being planted.

Phase 2 of the project includes construction of the bridge and the connection to 1st Avenue NE. This project is anticipated to remove 47 significant trees and another 16 trees that are not considered significant (total of 63 trees). Most of the trees identified for removal are necessary in order to build the bridge and put it in place. The project has been designed to protect 9 trees located on the Unitarian Church property near the connection to 1st Avenue NE.

Following the bridge project, WSDOT will be constructing a project to daylight Thornton Creek within the WSDOT right-of-way. Based on the timing of the projects, WSDOT has asked that the City not replant trees that are within the footprint of their daylighting project. The Thornton Creek project will have an extensive restoration plan that will include tree replanting. The 148th Bridge Project is planting 7 trees on private property that are outside the footprint of the WSDOT project.

View the arborist reports for this project

Construction impacts

Phase 1: Construction is underway. View the construction notification postcard (LINK) sent to nearby residents.

Phase 2: Construction is expected to begin in 2024 and a construction notification postcard will be sent in advance to impacted residents. To place the bridge, we will need to close I-5 in both directions for approximately 8-14 hours. We expect this to closure will take place in summer 2025.

Location and Design

The new bridge will stretch across I-5 at N 148th Street, be wide enough to accommodate pedestrians and bicyclists, and comply with Americans with Disabilities Act (ADA) standards.

Project Area Map - click image to enlarge

The project team sought public input throughout the early design and planning phases through community briefings, an online public meeting, and online open house. Community input contributed to decisions about what type of bridge will be built, and how the bridge will connect to the new station on the east side of I-5 and to 1st Avenue NE on the west side of I-5. The project consists of these three elements, which are shown below: