Ship Canal Water Quality project update 3/24/21

City of Seattle, Washington sent this bulletin at 03/24/2021 03:08 PM PDT

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Vote for your favorite Tunnel Boring Machine (TBM) name!

Thank you for submitting your naming ideas! After receiving over 1,200 TBM name submissions from the community, we celebrated! Although we needed extra time to thoughtfully review all the names, we’re now ready to announce the finalists. Are you ready to vote? Please continue to help us #NameThatTBM.

Vote here for your favorite TBM name March 24 – March 31.

The final name will be announced in mid-April. This summer this yet-to-be-named Tunnel Boring Machine (TBM) will begin digging a 2.7-mile long, 18-ft 10-in diameter storage tunnel to reduce Seattle’s sewer overflow by 2025!

Ballard

Over the next few months, we'll continue assembling the tunnel boring machine (TBM) and preparing the shaft and site for tunneling operations that begins this summer. During this time, you can expect:

More heavy equipment to arrive on site, such as cranes, potentially at night.
Truck deliveries of paving material, concrete, and equipment for the TBM and associated tunnel activities

Working hours are expected to be 7 am to 5 pm, Monday through Friday. We also anticipate working weekends over the next few months to prepare for tunneling.

East Ballard

Crews will continue ground improvement works in NW 45^th St. During these activities, you should anticipate:

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 to help direct traffic during daytime working hours. Please follow all detour guidance on site. Bicyclists must cross train tracks at 90-degree angles. Please use extra caution in wet weather as ramps may be slippery.
Both lanes of 11th Ave NW south of NW 45th St are now open and will remain open for approximately another month.
Noise and vibrations typical of a construction site.

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

See anticipated traffic impacts through 2021 on our website.

Fremont

Over the next few weeks, crews will continue utility work in NW 36th St., and prepare the site for the equipment required to support the 8-ft conveyance tunnel TBM. You should anticipate:

Dump trucks and excavators working on site and an uptick in traffic in Leary Way NW as trucks haul away excavated material and bring concrete 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.
A pump and bypass system running 24/7 to re-route an existing drainage line around the drop shaft. This system is powered by a generator and will be in place for several more weeks.
Generators running constantly to power the dewatering pumps until permanent power is available on site.
As early as April, 2^nd Ave NW, between Leary Way NW and NW Canal St, will be closed to vehicle and pedestrian traffic to conduct sewer and diversion structure work. This closure is anticipated to last through the end of the year.
As early as April, crews will be installing a new water main in Leary Way NW. This work will intermittently close up to two travel lanes at a time, but two-way traffic will be maintained and assisted by flaggers. If you live near the site, there may be a short, temporary water shut off. If your 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 to maintain progress.

Wallingford

Secant pile installation is expected to complete by the end of March. So far crews have completed about 90 of 101 piles. Excavation of the drop shaft will follow secant pile installation. For the next several weeks, you should anticipate:

Demobilization of heavy equipment on site such as the drill rig an oscillator, and steel casing. Trucks coming in and out of the site to haul away excavated material.

Normal work hours are Monday through Friday from 7 am to 5 pm.

Queen Anne

This site will continue to be relatively quiet over the next few weeks. Crews will return in April to work on the shaft lining wall. During construction of the lining walls, you should anticipate:

Trucks coming in and out of the site to deliver rebar and formwork.
Noise and vibrations typical of a construction site.
The West Ewing Mini Park parking lot closed. This closure is anticipated to last through mid-2023.
A localized Ship Canal Trail detour through summer 2022 (see map).