Archived Project Updates

There's a lot going on at each site. For more information, please read our latest project email posted in the project library. 

Come meet the project team and learn about upcoming work in Ballard!

Hi Ballard neighbors! Join us for a drop-in session to learn more about construction for the new Seattle Public Utilities Ballard Pump Station and Conveyance Project starting soon:

Wallingford

We have some very exciting news to share with you! The section of Stone Way N between N 34th and N 35th Streets has officially reopened! Our construction work in this area is wrapping up and we will be clearing away equipment and detour signs in the coming days. Periodic temporary lane closures may still be necessary over the coming months, and flaggers will assist with traffic during those times.

N 34th St at Stone Way N, including the left turn lane from N Northlake Way onto westbound N 34th St has reopened. Puget Sound Energy (PSE) has reconnected the gas main.

Interlake Ave N is closed to through-traffic for utility installation for several more weeks and will remain closed for final pavement restoration through November. During this period, vehicle traffic on Interlake Ave N south of N 36th St will be local access only down to N 35th St. 

Work is weather dependent. We will continue to keep the website updated with the most current schedule information and provide updates in the project email we send out every two weeks. Sign up to receive our email to the right. 

Ballard

Later this fall, work will begin on the Ballard conveyance project and the Ballard pump station. The Ballard conveyance project includes the installation of a 2000-ft long, 60-in diameter pipeline in Ballard along 24th Ave NW, NW 56th St, and 28th Ave NW. The pump station will be built at the 107-ft deep, 80-ft diameter vertical shaft that was used for tunneling. The Pump Station and Ballard Conveyance contractor is expected to begin work in early November

We will continue to keep the website updated with the most current schedule information.

East Ballard

NW 45th St and 11th Ave NW are fully reopened and the Burke Gilman Trail (BGT) has been moved back to it’s original location. Periodic temporary lane closures may still be necessary over the coming month, and flaggers will assist with traffic during those times. Some landscaping, fencing, and commissioning work remains.

Fremont

Lane restrictions in Leary Way NW will continue through November for final paving. The contractor has started final restoration along Leary Way NW.

Queen Anne

Crews have completed site restoration. The Ship Canal Trail is currently open in its original configuration. There may be localized trail detours in coming months as needed for crews to work.

Support our local businesses

We understand the challenges of living and working in a construction area. We continue to keep an eye on neighborhood impacts across our project areas and add new signage for detours and safe access to businesses. Businesses are open and ready to serve the community. Please support local businesses and follow all detour signage and safety directions when traveling through the work area.

There's a lot going on at each site. For more information, please read our latest project email posted in the project library. 

Wallingford

Closures in Wallingford: 

  • Stone Way N between N 34th and N 35th St is closed and is anticipated to re-open October/November 2024
  • N 34th St at Stone Way N, including the left turn lane from N Northlake Way onto westbound N 34th St is closed and is anticipated to re-open October/November 2024
  • The crosswalk on the north side of N 34th St across Stone Way N is also closed and is anticipated to re-open October/November 2024
  • Interlake Ave N is closed to through-traffic for utility installation for several more weeks and will remain closed for final pavement restoration through November. During this period, vehicle traffic on Interlake Ave N south of N 36th St will be local access only down to N 35th St. 

Work is weather dependent. We will continue to keep the website updated with the most current schedule information and provide updates in the project email we send out every two weeks. Sign up to receive our email to the right. See our updated detour map for more information about detours.

Ballard

Later this fall, work will begin on the Ballard conveyance project and the Ballard pump station. The Ballard conveyance project includes the installation of a 2000-ft long, 60-in diameter pipeline in Ballard along 24th Ave NW, NW 56th St, and 28th Ave NW. The pump station will be built at the 107-ft deep, 80-ft diameter vertical shaft that was used for tunneling. 

We will continue to keep the website updated with the most current schedule information.

East Ballard

NW 45th St and 11th Ave NW are expected to be fully reopened the week of October 7 and the Burke Gilman Trail (BGT) will be moved back to it’s original location at the same time. Some landscaping, fencing, and commissioning work remains.

Fremont

Lane restrictions in Leary Way NW will continue through October for final paving. The contractor has started final restoration along Leary Way NW.

Queen Anne

Crews have completed site restoration. The Ship Canal Trail is currently open in its original configuration. There may be localized trail detours in coming months as needed for crews to work.

Wallingford

Closures in Wallingford: 

  • Stone Way N between N 34th and N 35th St is closed and is anticipated to re-open October/November 2024
  • N 34th St at Stone Way N, including the left turn lane from N Northlake Way onto westbound N 34th St is closed and is anticipated to re-open October/November 2024
  • The crosswalk on the north side of N 34th St across Stone Way N is also closed and is anticipated to re-open October/November 2024

Work is weather dependent. We will continue to keep the website updated with the most current schedule information and provide updates in the project email we send out every two weeks. Sign up to receive our email to the right. See our updated detour map for more information about detours.

Ballard

Later this fall, work will begin on the Ballard conveyance project and the Ballard pump station. The Ballard conveyance project includes the installation of a 2000-ft long, 60-in diameter pipeline in Ballard along 24th Ave NW, NW 56th St, and 28th Ave NW. The pump station will be built at the 107-ft deep, 80-ft diameter vertical shaft that was used for tunneling. 

We will continue to keep the website updated with the most current schedule information.

East Ballard

Crews continue sidewalk restoration and paving in 11th Ave NW and NW 45th St between 11th Ave NW and 9th Ave NW. 11th Ave NW will be fully open after paving is complete. Beginning the week of July 8, the Burke Gilman Trail (BGT), between 9th Ave NW and 11th Ave NW (between the US Post Office building and the Ballard Fred Meyer store) will temporarily move to the newly paved area within the NW 45th St roadway for several weeks. Then the trail will be moved back to its original location along the south side on NW 45th St. This interim move is to allow for adjacent site restoration work. Trail markings and signals will still be in place and flaggers will be on site during construction working hours (Monday through Friday, approximately 7am to 4pm).We expect the BGT to be relocated back to its original location by mid-September.

Fremont

Leary Way NW is fully reopen. Later this summer, there will be lane closures for final paving.

Queen Anne

Crews have completed site restoration. The Ship Canal Trail is currently open in its original configuration. There may be localized trail detours in coming months as needed for crews to work.

There's a lot going on at each site. For more information, please read our latest project email posted in the project library. 

Ballard

The site will be relatively quiet over the summer. Look for updates in the coming months as we prepare for construction on the new pump station and conveyance pipes to begin.

East Ballard

Crews continue sidewalk restoration and paving in 11th Ave NW and NW 45th St between 11th Ave NW and 9th Ave NW. 11th Ave NW will be fully open after paving is complete. Beginning the week of July 8, the Burke Gilman Trail (BGT), between 9th Ave NW and 11th Ave NW (between the US Post Office building and the Ballard Fred Meyer store) will temporarily move to the newly paved area within the NW 45th St roadway for several weeks. Then the trail will be moved back to its original location along the south side on NW 45th St. This interim move is to allow for adjacent site restoration work. Trail markings and signals will still be in place and flaggers will be on site during construction working hours (Monday through Friday, approximately 7am to 4pm).We expect the BGT to be relocated back to its original location by mid-August.

Fremont

Leary Way NW is expected to fully reopen by late-July. Later this summer, there will be lane closures for final paving.

Queen Anne

Crews have completed site restoration. The Ship Canal Trail is currently open in its original configuration. There may be localized trail detours in coming months as needed for crews to work.

Wallingford

With the opening of the intersection at N 35th St and Interlake Ave N, all of N 35th St is now open! 

Starting as early as July 29 the north half of N 34th St at Stone Way N, including the left turn lane from N Northlake Way onto westbound N 34th St, will be closed for several weeks. The crosswalk on the north side of N 34th St across Stone Way N will also be closed. Crews will be doing utility work, then paving and restoring the roadway. See our updated detour map.

Wallingford work update  

Wallingford is still busy! Here are some more brief work highlights to keep you informed. We will update this section of the website with date and schedule changes, as a lot of work is weather dependent. For additional details, read our June 6, 2024 email update.  

  • Upcoming paving, restoration, and road closures in Wallingford lasting through the summer.
    • N 35th St – June: There are planned temporary one-lane closures to apply final pavement markings, this includes cure time. Work is planned for off-peak hours. At least one lane of traffic will be open, directed by flaggers.
    • N 35th St and Interlake Ave N – June through August: There are planned lane closures for additional utility work and temporary paving in the north portion of N 35th St and portions of Interlake Ave N of N 35th St. Our contractors will be using flaggers through June 14 to route traffic around the work area. Final sidewalk and pavement restoration to follow. Paving and restoration activities on N 35th St west of Interlake Ave N will last three to four weeks.
    • N 34 St – June through Sept: Now that N 35th St is fully reopened, there will be a period of several weeks where the north half of N 34th St at Stone Way N, including the left turn lane from N Northlake Way onto westbound N 34th St, will be closed for utility work followed by final paving and roadway restoration. PSE will be doing work on N 34th in the NW corner of the intersection during the day, starting as soon as the week of 6/17.

  • Buses that travel on N 35th St have returned to their normal routes and schedules.
  • The pedestrian crossing on the south side of the intersection of Stone Way N and N 35th St is closed. Pedestrians need to follow the approved detour route and cross Stone Way N at N 34th St.
  • The sidewalk along N 35th St has reopened for public use.
  • Please follow the updated approved detour map when walking, biking, and driving in the area.

Wallingford work update  

Wallingford is busy! Here are some brief work highlights to keep you informed. We will update this section of the website with date and schedule changes, as a lot of work is weather dependent. For additional details, read our April 24, 2024 listserv.  

  • Paving and restoration activities on N 35th St west of Interlake Ave N lasting three to four weeks. 
  • Work was scheduled to begin April 25, but is weather dependent. Due to rain, work is currently planned to start April 30. We will keep you updated on progress here.  
  • Following paving, the road will remain closed to allow pavement to cure properly, crews to paint the roadway and make final adjustments, and for restoration and clean up activities.  
  • The evening and weekend pedestrian pathway across the intersection of N 35th St and Interlake Ave N is temporarily closed for paving. Pedestrians may use a 4-foot wide portion of the new sidewalk on the north side of N 35th St between Stone Way N and Interlake Ave N during this work. 
  • Anticipated reopening of N 35th St and Stone Way N in May. Work is weather dependent so timing may shift. 
  • The pedestrian crossing on the south side of the intersection of Stone Way N and N 35th St is closed. Pedestrians need to follow the approved detour route and cross Stone Way N at N 34th St.  
  • The sidewalk along N 35th St has reopened for public use. 
  • N 36th St between Wallingford Ave N and Stone Way N is restricted to local access only. Please follow the approved detour map when driving in the area.  
  • This summer there will be intermittent closures of the norther portion of N 35th St and Interlake Ave N for water main work and roadway restoration.  



We made the Seattle Channel’s Most Memorable Videos of 2023! 

Check out our “boring story” and enjoy the other stories featured on their list: https://take21.seattlechannel.org/2023/12/14/most-memorable-videos-of-2023/ 

Pedestrian detour change at N 35th St and Interlake Ave N



The crosswalk across N 35th St has moved from the east side to the west side of the intersection as our contractor is continuing installation of the conveyance pipe on N 35th St between Interlake Ave N and Stone Way N. Another crew will also begin work soon on a conveyance pipe between Interlake Ave N and the Wallingford shaft site.

North Transfer Station

During this closure, the North Transfer Station team will haul waste away from the station in containers between 5:30 pm and 7:30 am, 7 days a week. For the next several months, trucks will exit the station eastbound on N 34th St to connect to Wallingford Ave N, where they will head northbound to N 45th St. From N 45th St, they will either connect to Highway 99 or I-5. Please note that sometimes these routes must be adjusted to account for illegally parked cars that prevent the large trucks from making some turns. Flaggers will be on N 34th St from 6 am to 8 am and from 5 pm to 7 pm to help control traffic and direct trucks out of the gate. These trucks require a significant turn radius. Please yield to truck traffic when possible or as directed by a flagger.

North Transfer Station operation hours will remain the same.


Leary Way lane restrictions starting August 14

Fremont detour

Map of Fremont work site and detours.

Lane reductions have resumed on Leary Way NW, between NW 39th St and 1st Ave NW and are expected to be in place for several weeks. Crews are replacing part of a water main that runs under Leary Way NW. Crews had anticipated being able to reopen Leary Way NW in the evening for the last several weeks of work. To reduce the length of closures overall, and to be able to do the work more efficiently, the closures will remain in place 24 hours a day, 7 days a week.

The map shows the lane reduction zone and an optional detour for those passing through the area to help ease congestion. There is no planned nighttime work, but the restrictions will stay in place for 24 hours a day, 7 days a week until the work is completed. Following the 24/7 lane reductions, crews may reduce lanes between 9 am and 3 pm intermittently.

Wallingford road closures changing week of September 5: N 35th St closed, N 34th St open

Map of Wallingford Conveyance work.

Starting as early as Tuesday, Sept. 6, N 35th St between Stone Way N and Interlake Ave N and the intersection of N 35th St and Stone Way will be closed. N 34th St will reopen to two-way traffic prior to the closure of N 35th St.

New vehicle, bicycle, and pedestrian detour maps  will help you navigate the changes coming to Wallingford at the intersection of Stone Way N and N 35th St. A note to people riding bicycles, please remember to dismount and walk your bike for safety on sidewalks. These detours are expected to remain in place until early 2024. We are working directly with adjacent neighbors to maintain access to all businesses.

August 2023

Wallingford Conveyance project will be expanding its work zone

Map of Wallingford Conveyance work.

Description: Beginning as early as Aug. 14, N 35th St will be closed between Stone Way N and Interlake Ave N. With MudHoney soon to be fully out of the neighborhood, crews will be expanding into N 35th St to install conveyance pipes that will extend from the diversion structure and connect to the new storage tunnel.

We are developing detour maps to help you navigate. If you are a driver, the detour will be similar to the routes and signage that were in place earlier this year. These detours are expected to remain in place until early 2024. We are working directly with adjacent neighbors to ensure access to businesses and properties will be maintained.

August 2023

Saying goodbye to MudHoney!

Part of MudHoney’s front shield was hauled off via a ‘normal’ oversized truck last week. Larger trucks have hauled away larger pieces during a couple of nighttime shifts. There will be a few more nighttime hauls in the coming weeks.

Description: MudHoney continues to be dismantled and brought off-site to be reused or recycled. That work is expected to wrap up in August, including hauling several large pieces off-site with oversized trucks over the coming weeks. Keep an eye on I-5, you may see one of the last segments cruising down the highway!

August 2023

MudHoney Breaks Through!

Crews look on as MudHoney breaks through at Wallingford. 

Description: MudHoney has broken through the last phase of the tunneling at the Wallingford shaft site. We didn’t get to see MudHoney come through because it was necessary to fill the shaft with water for the exit. The bubbles in the water show the moment of breakthrough. It was a very exciting moment for the teams and crews working on the project and many of them gathered to watch and take pictures. Crews will now put more focus on the Wallingford Conveyance Project at the intersection of Stone Way N and N 34th Street. When the storage tunnel is operational, this diversion structure will intercept flows before they reach a sewer outfall site in Lake Union. Instead, flows will be diverted to the new storage tunnel and pumped to the Westpoint Treatment Plant. 

July 2023

Digging deep in Stone Way N 

Crews near the intersection of Stone Way N and N 34th St pour the base slab of a diversion structure. 

Description: Wallingford Conveyance Project crews began working on a diversion structure at the intersection of Stone Way N and N 34th Street in 2023. The diversion structure measures 18 feet long, 18feet7inches wide, and approximately 17 feet deep. Crews began working on the diversion structure base slab in April 2023 and will continue to work on the floor and walls in the coming months. When the storage tunnel is operational, this diversion structure will intercept flows before they reach a sewer outfall site in Lake Union. Instead, flows will be diverted to the new storage tunnel and pumped to the Westpoint Treatment Plant. 

June 2023

Check out four new temporary art pieces in Ballard, East Ballard, Fremont, and Wallingford.

Stevie Shao stands by their piece, Water to Sky, in Ballard. 

Description: Enjoy the sunny weather with an art stroll through the Ship Canal project corridor. Look for these art pieces and learn about their stories. This edition of FLOW art features vibrant colors, captivating patterns, and powerful portraits. You can learn more about the artists and their art on our art page. 

February 2023

Our 8-foot diameter tunnel boring machine has finished its journey to Queen Anne! 

On Groundhog Day (2/2/23), our 8-ft diameter tunnel boring machine (TBM) reached its destination in Queen Anne. To prepare for the TBM breakthrough, our engineers filled the Queen Anne shaft with water to maintain the pressure balance of the TBM face and the surrounding groundwater. Our TBM operators successfully drove toward and broke through a predetermined circular target in the shaft wall with an extremely high level of precision, down to the millimeter. Check out our Flickr albums for more pictures of the TBM breakthrough and recovery.

December 2022

The Wallingford Conveyance Project: Coming to you Soon!

SPU needs to install new pipes along Stone Way N and N 35th St to connect Wallingford’s existing combined sewer outfall pipe to the future storage tunnel. To install these new pipes, there will be full and partial road closures and parking restrictions in the area. The first phase of work will close Stone Way N starting in early 2023 for at least one year.

Detours will shift over the course of the project. As early as January 23, Puget Sound Energy will be removing parking spots on Stone Way N, between N 34th St and N 35th St, to complete necessary utility work. As early as January 30, there will be a full closure of Stone Way N between N 34th St and N 35th St to vehicle traffic. A two-way bike lane and the sidewalk on the east side of Stone Way N will be maintained.

How to get around during the full closure of Stone Way N:


November 2022

The Wallingford Conveyance Project: Coming to you Soon!

As soon as January 2023, crews will begin installing a large pipe along Stone Way N and N 35th St, and a deep diversion structure near the intersection of Stone Way N and N 34th St. This pipeline will divert polluted stormwater and sewage into the storage tunnel. This work will entail some long-term and intermittent road closures. Learn more about the Wallingford Conveyance project and its impacts in the Wallingford neighborhood section below. 

August 2022

Connect with your Ship Canal through the Saltwater Soundwalk

logo for saltwater soundwalk showing water and circle wavy graphics

Our friends over at the Seattle Office of Arts & Culture, in collaboration with artists Jenny Asarnow and Rachel Lam (Anigiduwagi enrolled Cherokee Nation), have been thoughtfully curating a podcast. Saltwater Soundwalk is a new podcast that explores our relationships and responsibilities toward the Salish Sea and connecting waters, centering on Indigenous Coast Salish voices and language. Learn more about the Saltwater Soundwalk via this blog post or on the Ship Canal Water Quality art page, and listen to the full collection wherever you get your podcasts.

August 2022

MudHoney has arrived in East Ballard!

Two people in bright yellow vests and hard hats are inside the tunnel boring machine and surrounded by various gages and electricity conduits. One of them is sending a new cutterhead tool through a small door that leads to the front of the machine.
(Click or tap image to enlarge)

It’s an exciting moment in the world of the Ship Canal Water Quality Project: MudHoney, our 18-ft diameter tunnel boring machine (TBM), officially arrived at the East Ballard project site in early August! MudHoney has been grinding along for a while now, and this is one of several planned maintenance stops to check MudHoney’s cutterhead along the route.

MudHoney will be paused for several weeks while this inspection and maintenance takes place. Check out our listserv for more information about what takes place during these maintenance stops.

August 2022

11th Ave NW is down to one lane

map showing 11th ave down to one lane, south of 45th
(Click or tap image to enlarge)

Crews are building the diversion structure and conveyance pipes on 11th Ave NW that will eventually connect the existing sewer and stormwater pipe to the storage tunnel. To allow crews to perform this work,11th Ave NW, just south of NW 45th St, has been reduced to a single, narrow lane. Flaggers are directing northbound and southbound traffic as well as bicyclists during daytime working hours, and traffic signals will direct traffic during non-working hours. Directional signage is also in place. For safety, bicyclists should either dismount or cross train tracks at a 90-degree angle. Please use extra caution in wet weather as ramps may be slippery.

The single lane with flaggers will be in place until late November and likely need to resume in early 2023. We are hoping to open it up for the busy holiday season.

As a reminder, NW 45th St remains closed to traffic between 11th Ave NW and 9th Ave NW. Burke-Gilman Trail users continue to be detoured to the north side of NW 45th St through the project area.

August 2022

Ship Canal Trail detour changing course for the summer

Hello Ship Canal Trail users, the current Ship Canal Trail detour that has been in place for the past two years near Ewing Park, adjacent to Seattle Pacific University, will be temporarily removed as early as late May 2022. The trail will move back to its original location for the summer of 2022. Our contractor will be working on both sides of the trail so please be aware of your surroundings.

The current detour route will be reinstated this fall. After being reinstated, this detour will remain for the duration of construction in this location, likely until mid-2023.

A cyclist rides through the detour with a flagger holding a stop sign Cyclists using the Ship Canal trail (Click or tap image to enlarge)

June 2022

MudHoney v. Megaboulder

A pile of dirty machinery pieces that are MudHoney’s cutterhead tools that had to be replaced due to encountering a 10-ft boulder.
Some of MudHoney’s cutterhead tools that were replaced due to encountering a 10-ft boulder. (Click or tap image to enlarge)

In early May, MudHoney, our 18-foot diameter TBM, was tunneling eastward and ran into an enormous boulder. Although our designers and engineers had planned for a few boulders along the route, this one was exceptionally large for our area—about 10-feet tall. We’re not-so-fondly calling it Megaboulder.

We paused tunneling to check on MudHoney and get more information about boulder size and strength. MudHoney passed the overall health check, but we did have to replace and repair some cutterhead tools to better equip it for grinding through a solid piece of rock—a difficult task to complete while under 70 feet of water pressure, and in a space only 3 feet wide inside the very front of the TBM.

On Friday, May 27, we successfully broke through. Tunneling has resumed at its original pace.

Long story, short: We persevered. MudHoney beat Megaboulder. For more information, check out our June 2 program email.

May 2022

Intermittent lane reductions on Leary Way NW through approximately May 2022 [updated on 4/12/22]

Any new built structures need to have solid ground to live on. Jet grouting, one of many effective ways to stabilize and strengthen soil, is the way we will prepare the soil for upcoming Fremont construction.

To complete this work, we will need to close some traffic lanes on Leary Way NW from November through May 2022. Two lanes will always remain open (one lane in each direction), and when work is not taking place, we will leave all lanes open when possible. Access to all businesses will be maintained. If you are commuting through this area, consider taking our optional detour during this work. 

April 12, 2022 update:

The work related to soil stabilization in Leary Way NW is complete and the contractor has completed pavement restoration on the south half of the roadway. Starting Monday April 18, the contractor plans to shift traffic to the south half of the roadway to begin utility restoration work in the north half of NW Leary Way. This work will include intermittent closures over the next few weeks. NW Leary Way is expected to be fully reopened by mid-May.

construction map showing lane reductions
(Click or tap to enlarge) Updated April 2022

May 2022

MudHoney has resumed tunneling

A MudHoney tunnel boring machine operator, wearing a bright yellow sweater and hard hart, looks at four computer screens on a gray wall. There are a variety of buttons below and to the side of the screen; some are lit up.
MudHoney operator in the control room driving the tunnel boring machine. (Click or tap to enlarge)

After a planned pause, MudHoney, our 18-ft diameter tunnel boring machine (TBM), resumed tunneling on February 7. Before starting MudHoney, we sent our engineers and workers inside the excavation chamber under compressed air to check on the condition of the cutting tools. Pressurized air allows workers to safely enter the cutterhead chamber without groundwater entering the TBM. The pressure here is equivalent to recreational scuba diving at an 80-ft water depth. There are several more maintenance stops planned along the way.

For more information about how we keep MudHoney on track when we can’t “see” where we are going, take a look at one of our previous listservs.

May 2022

Building underground structures throughout the project corridor

This photo shows crews excavating a large rectangular hole in the ground in Queen Anne. Steel bracings reinforce the corners of the rectangular hole.
Diversion structure excavation at the Queen Anne project site. (Click or tap to enlarge)

Most of our city’s wastewater system is underground, which means a lot of digging during a project like this. To build a system that will keep sewage mixed with stormwater from entering the Ship Canal during heavy rains, there are supporting structures we need to construct in addition to our large and awesome storage tunnel (thanks for all the work so far, MudHoney!). In 2022, we’ll be building these supporting structures at our East Ballard, Queen Anne, and Fremont sites. They include vaults, drop shafts and diversion structures.

Check out our glossary for a deep dive into these structures and other more technical elements of our project!

February 2022

MudHoney pausing while crews build a rail system

MudHoney, the 18-ft storage tunnel boring machine (TBM), has tunneled approximately 880 feet. MudHoney has reached a planned pause to switch from the conveyor belt system of removing spoils to the rail system (see previous listserv for more information) and for trailing gear installation.

December 2021 

Keeping water service going during construction

Through the end of the year, crews will be installing temporary water pipes at our East Ballard and Fremont sites. These temporary pipes will be above ground or in a shallow trench near the project site. Crews will be working underground around the existing water pipes and installing the temporary bypass pipe allows them to do the work needed without shutting off water service. Check out this video to find out more about how a bypass pipe is connected.

Diagram of a bypass pipe system. There is a blue rectangle with the words underground work area in it and a black line going through it with the words underground water pipe above it. Another line goes around the blue box and has arrows going in one direction along it. This line has the words above ground temporary bypass water pipe above it.
Diagram of a bypass pipe system

November 2021

Ballard Pump Station: Construction to start in 2023

The Ballard Pump Station will hold mechanical and electrical equipment to pump flows out of the storage tunnel and send it to treatment at King County’s West Point Wastewater Treatment Plant. The 90% design was approved by the Seattle Design Commission in early October. Construction will begin in 2023.

The pump station building will be an 80-ft tall, illuminated tower, inspired by Ballard's shipyards and maritime industry. The site includes artwork by Jeffrey Veregge, from the Port Gamble S’Klallam Tribe, that celebrates the Coast Salish heritage and historical use of the area. Interested in knowing more about the pump station? Watch our introductory video below and learn more about these future improvements through our Flickr album.

October 2021

Check out our latest artwork!

The latest temporary artworks from FLOW are now on display in Fremont, Ballard, Wallingford and East Ballard. Enjoy the start of Fall with a stroll through your neighborhood to look for these pieces and learn about their stories. You can learn more about the artists and their art on our art page.

September 2021

Our tunnel boring machines have launched!

We are so excited to announce that both of our tunnel boring machines (TBMs) have begun tunneling. MudHoney, our 18-ft storage tunnel TBM, began its 2.7-mile journey to construct a storage tunnel from Ballard to Wallingford. Our 8-ft conveyance tunnel TBM will take a little over three months to dig from Fremont to Queen Anne and connect Queen Anne’s wastewater basin to the larger storage tunnel being built by MudHoney.

If you want to take a break and get out some coloring pencils or markers, check out our coloring sheets!

tunnel boring machine
Click to enlarge

August 2021

In East Ballard 11th Ave NW reduced to single-lane this summer

As early as Tuesday, July 20, 11th Ave NW will reduce to single lane traffic. Traffic will be controlled by flaggers during the day and traffic lights at night. During this time, crews will excavate for pipe and structure work in 11th Ave NW.

An aerial map of the Ship Canal Water Quality Project East Ballard site from now until Early August 2020. The base map shows the approximate work zone in a red box that runs from the intersection of 11th avenue Northwest and northwest 45th street. This box extends along one lane of Northwest 45th Street. A dotted line runs along Northwest 45th Street and depicts the Burke-Gilman trail detour. Parallel to the dotted blue line are black arrows that run east and indicate the traffic flow on impacted roadways. Black arrows also are located on 11th Avenue Northwest and go both directions to indicate traffic flow on impacted roadways.
Click to enlarge

June and July 2021

Our 8-ft conveyance tunnel boring machine has arrived in Fremont!

Our 8-ft conveyance tunneling boring machine (TBM) has arrived in Fremont. This smaller TBM will dig from Fremont to Queen Anne, connecting Queen Anne’s wastewater basin to the larger storage tunnel. It will sit in the Fremont shaft until tunneling begins this month. To learn more, check out the Fremont section of our website.

A picture containing indoor, engine
Our smaller 8-ft conveyance TBM | Click to enlarge

Water main work in East Ballard in July

Crews will perform a water main bypass this summer that will require a short, temporary water outage. If your service will be impacted, you'll receive a door hanger with more information.

May 2021

MudHoney is getting ready to dig!

In April, our crews lowered MudHoney, our 18-ft diameter storage tunnel boring machine, into the shaft in Ballard, where its tunneling journey will begin later this summer. Check out our new video, showing what it takes to lower MudHoney into the tunnel shaft in different pieces. Each piece can weigh between 25 and 150 tons!

2nd Ave NW closure between Leary Way NW and Canal St in Fremont coming up

Starting as early as mid-May, 2nd Ave NW will be closed to vehicle and pedestrian traffic to conduct sewer and diversion structure work. This closure is expected to last until the end of the year. For more information, please take a look at our construction flyer.

map of construction area
Click to enlarge

April 2021

Meet our Tunnel Boring Machine (TBM), MudHoney!

We received over 1,200 TBM name submissions from the community, and over 30,000 votes! After tallying all the votes, we are thrilled to announce that our TBM is now named MudHoney!

Thank you for helping us #NameThatTBM!

This summer MudHoney will begin digging a 2.7-mile long, 18-ft 10-in diameter storage tunnel to reduce Seattle’s sewer overflow by 2025! Sign up for our project email list to learn how to follow along as MudHoney digs under our feet. MudHoney has already had a chance to meet the band it was named after, take a look at this video to see how that went!

Four individuals wearing sweaters and hardhats stand in front of a tunnel boring machine that has the word MudHoney drawn in yellow and black letters
Seattle based-band Mudhoney and the Ship Canal Water Quality Project Tunnel Boring Machine! | Click to enlarge

Devin Finley - Tunnel Boring Machine

Devin Finley is a muralist who specializes in large scale inspired murals. He started as a graffiti artist at age 15 because he loved street accessible art. He became a professional muralist in 2013 and works on both private and public projects. He likes working with clients and audiences to develop engaged and meaningful concepts. His project “MUDHONEY” was painted onto the project’s Tunnel Boring Machine on April 5, 2021. The TBM was named "MudHoney" and Devin used lettering and water droplets to connect the enormous machine, one of Seattle’s famous grunge bands, and rain-- which is part of the reason for the project.

Four individuals wearing sweaters and hardhats stand in front of a tunnel boring machine that has the word MudHoney drawn in yellow and black letters
Seattle based-band Mudhoney and the Ship Canal Water Quality Project Tunnel Boring Machine!

We are assembling the Tunnel Boring Machine in Ballard!

We're busy assembling the tunnel boring machine (TBM) on our Ballard site, which will begin its 2.7-mile journey later this summer. Keep an eye out for its official name, informed by community input, this spring!

A large red tunnel boring machine is assembled by crane.
Crews assembling the tunnel boring machine that will be used for the Ship Canal Water Quality project | Click to enlarge

New art installations are being added to our construction sites!

In February and March 2021, four new artists will install temporary art installations along our construction sites. Check out the art tab to learn more.

Rectangular blocks in different colors contain images of a black individual in a jean jacket pointing. Each block is colored pink and turquoise and contains fragmented images of the individual
Rendering of Barry Johnson’s If only I could art installation. | Click to enlarge

March 2021

Stormwater permit request for Wallingford Conveyance project

We have requested a Construction Stormwater General Permit for the Wallingford Conveyance project, which will install a 213-ft long, 36-in diameter pipeline along Stone Way and a 412-ft long, 42-in diameter pipeline along N 35th St to convey polluted stormwater and sewage from the Wallingford neighborhood into the storage tunnel. Stormwater from construction sites can carry debris and chemicals to close-by waterways and this permit will specify mitigation requirements to be implemented at our construction site to help reduce water pollution. Department of Ecology will monitor the performance of our mitigation measures through inspections and water quality assessments.

The 30-day public comment period for Department of Ecology began on February 23, 2021.

Thank you for submitting Tunnel Boring Machine (TBM) naming ideas!

Due to the overwhelming response (we received over 1,200 submissions!), we are pushing back the voting start a few days to allow for more time to be thoughtful in our selection process. Ship Canal team members will select their favorite submissions and put them to a public vote! Stay tuned for more information. 

Be sure to check back in or sign up for our project email list for updates!

February 2021

Pieces of the Tunnel Boring Machine have started to arrive in Ballard

It's here! Our tunnel boring machine arrived from Germany and is making its way to Ballard from the Port of Tacoma. Because the machine is so big, it is arriving in pieces via several oversized deliveries and will be assembled at our Ballard site over the next few months. The photos below show crews unloading a section of the lower shield last week, and then what the machine will look like fully constructed.

A large piece of the orange outer shield of the tunnel boring machine being lowered by a crane onto a cradle. Several people are helping to direct it.
Sections of the storage tunnel boring machine have started to arrive in Ballard. This is a piece of the shield | Click to enlarge
A large red and white tunnel boring machine at a construction site.
The tunnel boring machine that will be used for the Ship Canal Water Quality project | Click to enlarge

January 2021

Construction progress in 2020

Construction is underway at all five project sites. As of December 2020, the secant pile wall in Queen Anne is complete, Fremont’s is nearing completion, and we are breaking ground on this activity in Wallingford. Soil stabilization in East Ballard continues, and we just reached a huge project milestone in Ballard - completing the concrete pour for the 14-ft thick, 87-ft wide shaft floor. We are thankful for your patience and support as we continue this essential work to reduce combined sewer overflows in our waterways by 2025.

Visit our Flickr page to see photos of recent construction activities.

A large, blue double head drill is used to complete secant pile wall construction in Queen Anne.
Secant pile wall construction nearing completion at the Queen Anne site | Click to enlarge

December 2020

The Tunnel Boring Machine is headed to Seattle and will arrive in early 2021!

Our Tunnel Boring Machine has left Germany on a ship and is on its way to Seattle! Over the next few months this machine will make its way to the shores of the Puget Sound where it will be prepped to start boring a 2.7-mile tunnel from Ballard to Wallingford. Watch this video to learn more about the machine as it begins its journey west!

A large red and white tunnel boring machine at a construction site.
The tunnel boring machine that will be used for the Ship Canal Water Quality project | Click to enlarge

Seattle artist taking T-shirt donations through Dec 31

In Spring 2021 we will be installing a new round of temporary art installations along our construction sites. Interested in participating? Seattle artist Janelle Abbott is taking t-shirt donations now through Dec. 31 to create her piece in Wallingford. Learn about how you can donate t-shirts for the installation.

A chain link fence at a construction site. The word FUTURE has been graphically added to the front of the fence in large, colorful block lettering
Public art installment area at the Walllingford site | Click to enlarge

November 2020

Secant pile wall construction begins in Queen Anne

Starting November 9, 2020, crews began construction on the secant pile wall at the Queen Anne site. This work is expected to be complete in late-December. A secant pile wall is used to support underground excavations. It is made up of overlapping vertical concrete piles, which together hold back surrounding soil to allow for excavation and underground construction. To create a pile, a hole is bored into the ground using a drilling machine and is filled with concrete. During this phase of construction, you should anticipate:

  • More heavy equipment on site like the drilling machine, crane, rebar cages and trucks traveling and out of the site.
  • Noise and vibration from the drilling machine. You may be able to feel the vibration which is expected. We are monitoring vibration levels on site to ensure they are within allowable levels.
  • The West Ewing Mini Park parking lot to be closed. This closure is anticipated to last through mid-2023.
  • A localized Ship Canal Trail detour through summer 2022. You can view the detour here.
A construction worker in a small white excavator dumps gravel into a rectangular funnel at a construction site
Secent pile wall construction in November 2020 | Click to enlarge

October 2020

Vertical shaft excavation started in Ballard

In early October, crews began excavation of the 120-ft deep, 87-ft wide vertical shaft at the Ballard site (see photo from the week of Oct. 5). This work is expected to be complete in mid-November. Once excavation is complete, the contractor will construct the interior walls with reinforced concrete, including the 14-ft thick base slab. The shaft will be the launch site for the tunnel boring machine in 2021.

This shaft will ultimately be part of the future Ballard pump station. The pump station will be used to drain water from the storage tunnel and send the water to the West Point treatment plant. It will also be used to provide maintenance access to the storage tunnel.

Three yellow excavators remove dirt from the vertical shaft site in Ballard
Excavating the vertical shaft at the Ballard site in October 2020 | Click to enlarge

Meet the artists for our construction sites

Our first round of temporary art is now installed in four neighborhoods. Check out the new videos from our artists, sharing their background and inspiration for their installations, on the art tab.

Murals placed along the Wallingford screen wall in late July 2020. The murals depict 4 killer whales and are drawn in form design. In the middle of the images is a white sign that states Protect the sacred, Missing Murdered Indigenous Women.
Mural was placed on the Wallingford screen wall in late July 2020 | Click to enlarge

September 2020

Getting ready for secant piles in Fremont and Queen Anne

In September, we’re planning to start shaft construction in Fremont and Queen Anne. Shaft construction will start with installing “secant pile” walls. A secant pile wall is a type of construction used to support underground excavations. It is made up of overlapping vertical concrete piles, which together hold back surrounding soil to allow for excavation and underground construction. To create a pile, a hole is bored into the ground using a drilling machine and is filled with concrete. During this phase of construction, you should anticipate:

  • More heavy equipment on site like the drilling machine, crane and rebar cages.
  • Noise and vibration from the drilling machine. If you live or work within a few blocks of a site, you may be able to feel the vibration in your building. This is expected. We are monitoring vibration levels on site to ensure they are within allowable levels.
  • Trucks in and out of the site to haul away excavated material and deliver concrete.

24th Ave NW pier to stay open for now

Ballard’s 24th Ave NW pier will remain open until further notice because our tunneling contractor does not currently need it for construction activities.

More art at our construction sites

Our first round of temporary art is now installed in four neighborhoods. Check out the new art tab on our website to learn more.

Murals placed along the Wallingford screen wall in late July 2020. The murals depict 4 killer whales and are drawn in form design. In the middle of the images is a white sign that states Protect the sacred, Missing Murdered Indigenous Women.
Mural was placed on the Wallingford screen wall in late July 2020 | Click to enlarge

We’re on Flickr!

Seattle Public Utilities is now on Flickr! Check out albums uploaded this week highlighting temporary art and recent construction activities.

August 2020

Queen Anne trail detour update

We heard some community concerns about our previously proposed trail detour, so we worked with our contractor to move it. As early as mid-August, the trail will be moved just south of the existing trail, through the adjacent parking lot near Seattle Pacific University and West Ewing Mini Park.

The detour will be about 200 feet long and will be on a fully paved, 8-ft wide asphalt path that allows for two-way bike traffic. Trail users will be expected to yield to traffic on 3rd Ave W (same as now). This detour will remain in place until mid- to late 2022.

Keep a look out for signs on the trail. We will continue to update you on detour timing and any changes to detours via our project email list.

Bringing art to our construction sites

Did you know that there are both temporary and permanent artworks as part of the Ship Canal Water Quality Project?

There are two temporary artworks currently on display, including new art by Kalee Nelson and Crystal Christopherson that was installed on our Wallingford screen wall in late July. Elevating awareness of Missing Murdered Indigenous Women is the key goal of this temporary installation that includes a large-scale mural featuring traditional formline design of orcas.

Two more temporary artworks will be installed later this summer. Learn more about these pieces and the others that will be installed on our new Art page!

Murals placed along the Wallingford screen wall in late July 2020. The murals depict 4 killer whales and are drawn in form design. In the middle of the images is a white sign that states Protect the sacred, Missing Murdered Indigenous Women.
Mural was placed on the Wallingford screen wall in late July 2020 | Click to enlarge

Construction underway in all neighborhoods!

As you scroll down this page, you’ll note that construction is going on in all five neighborhoods. For more detailed information, take a look at the fact sheets in our Project Library. We also encourage you to sign-up to our project email for any updates or changes to these schedules.

July 2020

Heads up trail detours coming!

The weather has been perfect for enjoying the trail and we want to make sure your trip goes as smoothly as possible. Here are some things you should know about upcoming trail detours.

a cyclist with a backpack and helmet on rides East on NW 45th St towards 9th ave NW
Person biking on sidewalk in East Ballard

East Ballard detour: As early as July 6, the Burke-Gilman Trail will be detoured from the south side of NW 45th St to the north side of NW 45th St between 11th Ave NW and 9th Ave NW, next to Fred Meyer. Two-way traffic will be maintained and flaggers will be on-site during the daytime. You will be directed to cross at a 90-degree angle to safely traverse the railroad tracks. This detour will remain in place until early 2023.

Queen Anne detour: As early as July 20, the Ship Canal Trail will be detoured onto 3rd Ave W, W Nickerson St and W Cremona St. This detour will remain in place until mid-2022.

Keep a look out for signs on the trail. As work progresses we will continue to update you on detour timing and any changes to detours will be shared via our project email list. Also, feel free to give us a call with any comments or suggestions on how to get the word out.

Construction starting in East Ballard and Fremont

In May and June, work will begin in the following locations:

  • East Ballard: Work will take place on NW 45th St between 11th Ave NW and 9th Ave NW, and on 11th Ave NW just south of NW 45th St (near Fred Meyer)
  • Fremont: Work will take place near the intersection of Leary Way NW, NW 36th St and 2nd Ave NW

Work at both sites will involve above- and below-ground construction to build new pipes and vertical shafts to connect the current combined sewer system overflow pipes to the new storage tunnel. During the first few months of work, crews will set up fencing, remove trees, curbs and existing asphalt, and stabilize soils to prepare for underground construction.

June 2020

Slurry wall construction begins in Ballard!

The slurry wall is a reinforced-concrete circular structure that will allow for safe excavation of the vertical shaft, which will ultimately bring stormwater and sewage flows into the new storage tunnel. The vertical shaft will also be the starting point for the tunnel boring machine that will begin its journey next year.

This work includes putting rebar steel cages inside 210-ft deep trenches and filling them with concrete. You can expect a large uptick in equipment and trucks going in and out of the work site to support this construction.

Equipment has moved on to the Ballard site to prepare for slurry wall construction.
Equipment used for Ballard slurry wall construction.

May 2020

It's a bird! It's a plane! It's a ...crane!

If you’re passing by our Ballard site, take a look up and check out the 250-ton crane towering over the work zone! The crane arrived from the mid-west in early April and crews have been busy assembling this massive piece of equipment.

The crane’s first assignment is to assist with slurry wall construction, one of the earliest phases for vertical shaft construction. It will be an 87-ft diameter, 210-ft deep, 4-ft thick reinforced concrete circular structure which will keep walls from collapsing during shaft excavation. You may experience additional noise and vibrations associated with this work.

Eventually, when the shaft is complete, we'll launch our tunnel boring machine through it!

Video of the Crane at the Ballard site

crane operator looks up at a crane
Crane at the Ballard work zone

April 2020

Ballard’s 24th Ave NW Pier is open to the public!

We are pleased to share that the 24th Ave NW Pier has been temporarily re-opened to the public!

It will close again in late August to support construction activities, so we hope you get a chance to enjoy it while the sun is out this summer. Next year, crews will use the pier to carry tunnel spoils away by barge, which will reduce the number of truck trips needed and help mitigate traffic impacts.

a pier strethes out into the water with sailboats in the background
The 24th Ave NW Pier is temporarily re-opened for public use

February 2020

Construction in Ballard will begin as early as February 20

Starting the week of February 20, crews wil begin installing a 12’ high sound wall, stormwater controls, and dewatering equipment at the Ballard site. For more information, please see a copy of the construction flyer that went out to more than 2,100 businesses and residents near the work site.

Thank you!

Thank you to all who attended our Ballard drop-in session on Dec. 11, 2019, to learn more about construction in 2020. If you were not able to attend, we have uploaded a PDF version of the meeting boards for you to read at your leisure.

We appreciate the nearly 500 people who took time to fill out our survey on Ballard's 24th Ave NW street end designs. The survey is now closed. Stay tuned for next steps!

December 2019

Take our survey on Ballard's 24th Ave NW street end designs through Jan. 10 2020

Thank you to all who attended our Ballard drop-in session on Dec. 11, 2019, to learn more about construction in 2020. If you were not able to attend, we have uploaded a PDF version of the meeting boards for you to read at your leisure.

We would also love to hear your thoughts on the designs for the 24th Ave NW street end in Ballard. Please complete this survey available through Jan. 10, to provide feedback. We appreciate you taking the time to help us learn more about what you want to see once construction is complete!

View archived survey page.

November 2019

November Public art update

Over the summer, our Wallingford artist, RYAN! Feddersen, asked community members what water means to them. Their responses inspired her to create temporary artwork along the Ship Canal alignment that is activated by rain. Next time you’re walking along the tunnel alignment, take a look at the sidewalk and learn about why your neighbors value water. The installations are expected to last between four and six months.

map of locations for artwork
Discover RYAN!’s artwork at each of the locations marked on the map. (Click or tap image to enlarge)
art on sidewalk reading waterways are our streets are our waterways
Artwork activated by water on the sidewalk. (Click or tap image to enlarge)

October 2019

Early work at our Ballard site is underway!

Crews are preparing our Ballard site for tunneling. Here are the activities they’re working on:

  • Replacing the 24th Ave NW Pier to prepare for removing tunnel spoils by barge
  • Replacing the outfall pipe under the pier
  • Relocating utilities
  • Removing contaminated soils from the shaft site

Public art

Local artist Vaughn Bell is leading several artists to install permanent artwork along the storage tunnel alignment across all five neighborhoods. Artists will use a wide variety of mediums, materials and techniques to make our underground infrastructure and regional water quality improvements more visible.

Some goals of the Ship Canal public art include:

  • Increasing public awareness of the function of water quality projects and infrastructure
  • Making an invisible system more visible
  • Connecting people to the flow of water in their city, their home and local ecology
  • Creating meaningful, inspiring and thought-provoking art experiences in the public realm

Artwork will include both permanent and temporary installations.