Ship Canal Water Quality Project update 4/13/2023

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New season, new artwork!



Spring is a season of change and a great time to welcome some new artwork along the Ship Canal. Take a stroll along our project corridor and check out some amazing pieces near our work areas, such as CONNECTING THE VISION at our Fremont site.

According to the artist Abraham Awalom, “In these paintings, I explore and capture profound relationships of humankind. As an immigrant and artist, I connect my past experiences to the present through the impact of human behaviors influenced by socio-cultural factors. Through collage, I combine materials such as paint and yarn to create textured and layered effects that reflect outside influences that deeply impact our lives. The result is a rich visualization of my dreams that captures our emotional journey as we navigate through the natural and human worlds.”

You can find information about our new temporary FLOW art piece on our art page. To learn more about the project, visit our project website. We also continue to update our Flickr albums with construction photos.

MudHoney graphic


Our 18-ft diameter tunnel boring machine has tunneled over 12,060 feet! Follow along with our tunneling tracker on our project website.

Ground monitoring is ongoing along the tunnel alignment and is done from both inside MudHoney and on the surface.


Our Ballard shaft site near Shilshole Ave NW will continue to be busy with tunneling activities until MudHoney reaches Wallingford this year.

During regular tunneling activities, you should anticipate:

  • Truck deliveries of concrete segments and MudHoney equipment
  • Nighttime segment deliveries and both nighttime/daytime tunnel spoils being hauled off
  • Noise and vibrations typical of a construction site

Crews are working 24 hours a day, six days a week.

East Ballard

Crews continue building the mechanical and electrical vault on NW 45th St and the diversion structure walls on 11th Ave NW. Crews are also working to connect the conveyance pipe that will extend from the diversion structure to the storage tunnel.

Local closures and detours:

  • There continues to be a one-lane traffic configuration on 11th Ave NW at NW 45th St. Traffic signals and flaggers will direct traffic at the intersection during single lane closures.
  • NW 45th St remains closed to traffic between 11th Ave NW and 9th Ave NW; vehicles must detour onto NW 46th St
  • Burke-Gilman Trail remains detoured to the north side of NW 45th St through the project area. For safety, bicyclists should either dismount or cross train tracks at a 90-degree angle. Please take extra caution in wet weather as ramps may be slippery.

You should anticipate:

  • Heavy equipment in the area
  • Noise and vibrations typical of a construction site

Regular work hours will be Monday through Friday, from 7 am to 5 pm. Night and weekend work may occur.


Crews continue to install a shoring system to keep soil out of underground work areas ahead of constructing a large mechanical vault and installing the conveyance pipes.

Local closures and detours:

  • Our contractor will be working intermittently in the southernmost eastbound lane of Leary Way NW during working hours for the next several weeks
  • On 2nd Ave NW, between Leary Way NW and NW Canal St, the street remains closed to vehicle and pedestrian traffic through mid-2023. NW Canal St is open to two-way traffic to allow access during this closure.
  • NW 36th St, between Leary Way NW and 3rd Ave NW, remains closed through 2023
  • Pedestrian detours are in place on Leary Way NW; please follow all detour guidance

You should anticipate:

  • Truck traffic on Leary Way NW as trucks bring materials and equipment to and from the site
  • Fans running during work hours to provide fresh air to crews working in the shaft

Regular work hours will be Monday through Friday, from 7 am to 6 pm; and some Saturdays from 9 am to 6 pm.


Crews continue working on the electrical building and gate structure at the Wallingford site on Interlake Ave N and N 35th St.

Wallingford Conveyance project crews continue working within Stone Way N, between N 34th St and N 35th St to install conveyance pipes, a diversion structure, and perform utility work. Crews have completed installation of a temporary sewer bypass pipe down the center of Stone Way N and will begin construction of the diversion structure.

Vehicle detour:

  • Stone Way N between N 34th St and N 35th St is closed to vehicles
  • Westbound N 34th St has reopened to through traffic between Wallingford Ave N and Woodland Park Ave N
  • Traffic is being detoured via N 40th St, Wallingford Ave N, N 34th St, N 35th St, and Woodland Park Ave N
  • Improvements are being made at the all-way stop traffic revision at the intersection of N 35th St and Woodland Park Ave N and a new all-way stop has been installed at N 35th St and Wallingford Ave N
  • Please adhere to the Road Closed and Traffic Revision Ahead signage and follow the detour route

Bicycle detour:

  • Please use the bike detour route to bypass Stone Way N between N 35th St and N 34th St
  • Southbound: bicyclists will be detoured west on N 35th St and south on Woodland Park Ave N, then west onto the Protected Bike Lane. Access to the Burke Gilman Trail (BGT) is at Troll Ave N
  • Northbound: bicyclists are detoured east along N 34th St (or the BGT) then north on Wallingford Ave N
  • Please dismount and walk if you use the sidewalk

You should anticipate:

  • Trucks coming in and out of the site
  • Noise and vibrations typical of a construction site

Regular work hours will be Monday through Friday, from 7 am to 5:30 pm.

Queen Anne

Crews are installing piping and an air duct inside the 8-ft diameter tunnel casing.

Local closures and detours:

  • Localized Ship Canal Trail detour at least through summer 2023 (see map). Please continue to remain alert when moving through this area.
  • West Ewing Mini Park parking closure through mid-2023

You should anticipate:

  • Trucks coming in and out of the site
  • Noise and vibrations typical of a construction site

Regular work hours will be Monday through Friday, from 7 am to 5 pm. Night and weekend work may occur.

Contact Us

Please email with questions or comments or call our hotline at (206) 701-0233. You can also find information online at To support the community during active tunneling, we have changed our hotline hours to 24 hours a day, Monday through Friday.

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