  Gantry crane assembled at the Ballard shaft site
You may have noticed large orange beams at our work site in Ballard. Those beams are actually our 43-foot-tall gantry crane. A gantry crane is built on rails so that it can easily move back and forth over its worksite, similar to cranes you would see at a port. Crews will be building a second gantry crane. Our gantry cranes are going to help us move things in and out of the excavation shaft.
In these first few hundred feet of boring, MudHoney’s spoils are moved out of the tunnel to a muck pit at the bottom of the shaft via a temporary conveyor belt system. MudHoney will pause after digging about 800 feet to transfer to a permanent rail system. The rail system will move spoils to the same muck pit where the gantry crane will lift them up and place them into a storage area west of the shaft. Crews will then move the spoils to trucks to be hauled off site.
For more information on how our tunnel will be built, take a look at our MudHoney fact sheet, and follow MudHoney’s journey on our website.
As always, we encourage you to check out our Flickr albums with recent construction photos, including other gantry crane images.
Ballard & MudHoney
MudHoney, the 18-ft storage tunnel boring machine (TBM), began tunneling a couple of weeks ago! It has already tunneled over 50 feet.
During tunneling, you should anticipate:
- Heavy equipment, such as cranes, arriving and being installed on site
- Truck deliveries of the concrete segments, and MudHoney equipment
- Tunneling activities
- Nighttime segment deliveries and tunnel spoils getting hauled off
- Noise and vibrations typical of a construction site
Crews are working 24 hours a day, 5 days a week, and will continue until the tunnel reaches Wallingford in fall 2022. Weekend work may also occur.
Ground monitoring is ongoing along the tunnel alignment and done from both inside MudHoney and on the surface.
East Ballard
Crews will be postponing weather-sensitive work on the diversion structure in 11th Ave NW until mid-2022. For the remainder of 2021, crews will work in NW 45th St on installation of the temporary water main, dewatering wells, and excavation support for the mechanical and electrical vault.
During this time, you should anticipate:
- Both lanes of 11th Ave NW south of NW 45th St will be open starting this week. It will be reduced to single lane again in mid-2022 for the diversion structure work.
- The final connections for the water main bypass will require a short, temporary water outage. If your service will be impacted, you'll receive a door hanger with more information.
- Heavy equipment in the area
- NW 45th St closed to traffic; vehicles must detour onto NW 46th St
- Burke-Gilman Trail users remain detoured to the north side of NW 45th St. Flaggers will help direct traffic during daytime working hours. Please follow all detour guidance on site. 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.
- 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.
Fremont
The 8-ft conveyance TBM began tunneling this month! Utility work in Leary Way NW and on site continues.
During this time, you should anticipate:
- An increase in truck traffic on Leary Way NW as dump trucks haul away spoils from tunneling
- Excavators working on site for utility installation work
- Truck traffic on Leary Way NW as trucks bring materials to the site
- NW 36th St between Leary Way NW and 3rd Ave NW closed (through remainder of the project)
- Pedestrians detoured to the north side of Leary Way NW
- Generator running during work hours to power the TBM and associated equipment
- 2nd Ave NW, between Leary Way NW and NW Canal St, closed to vehicle and pedestrian traffic for sewer and diversion structure work through the end of the year
- NW Canal St is open to two-way traffic to allow access during this closure. Please do not park at the west end of NW Canal St to allow two-way traffic to turn around at the closure.
- Noise and vibrations typical of a construction site
Crews have begun working intermittently in Leary Way NW on a new water main. This work will require some lane closures on Leary Way NW and a short, temporary water outage. If your water service will be impacted, you'll receive a door hanger with more information.
Regular work hours will be Monday through Friday, from 7 am to 5 pm. Night and weekend work may occur.
Wallingford
Crews will start constructing the shaft liner wall in September.
During this work you should anticipate:
- Trucks coming in and out of the site to deliver reinforcing steel and concrete
- Noise and vibrations typical of a construction site
Regular work hours are Monday through Friday, from 7 am to 5 pm.
Queen Anne
Crews will begin installing temporary shoring next month for construction of the diversion structures. During this time, you should anticipate:
- Trucks coming in and out of the site
- Noise and vibrations typical of a construction site
- The West Ewing Mini Park parking lot to remain closed through mid-2023
- A localized Ship Canal Trail detour through summer 2022 (see map)
Regular work hours will be Monday through Friday, from 7 am to 5 pm. Night and weekend work may occur.
Contact us
Please email SPU_ShipCanalProject@seattle.gov with questions or comments or call our hotline at (206) 701-0233. You can also find information online at spushipcanal.participate.online/.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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