Innis Arden Way road closure extended to November 30, 2026

This photo, taken in August, shows the full depth of the excavation we completed.
Photo courtesy City of Shoreline.

Shoreline is replacing the culvert below NW Innis Arden Way for the Boeing Creek Culvert Replacement Project (Hidden Lake Phase II). 

This work will help minimize flood and erosion risks in the area. It will also help remove barriers to future fish passage.

NW Innis Arden Way is fully closed between NW 166th Street and the entrance of Shoreview Park. We had planned to reopen the road by October 31. While we have made considerable progress on the work in this area, our contractor needs extra time to rebuild the roadway and have Seattle Public Utilities connect the water lines. 

The road closure will now last until November 30.

We know that construction and road closures are disruptive to project neighbors and everyone who travels through the area. We appreciate your continued patience as we complete this work and reopen the road safely.

After the road has reopened, we may still need to temporarily close single lanes of traffic during work hours. Flaggers will be present to guide traffic through the work area.

This photo, taken in September, shows the size of the culvert we placed. This culvert is the largest size available. Photo courtesy City of Shoreline

Project Progress

Since the road closure began in June, we have fully excavated the existing roadway and placed the new culvert and stream bed.

We’re currently working to backfill over the culvert, continue improving the stream bed, and plant trees and other vegetation.

Project information and updates here