Skip ribbon commands
Skip to main content


​This project will be completed in 3 stages; work is anticipated to being in January 2023 on Stage 1 and we estimate the entire project will be finished by Spring 2026.

Stag​e one

Mid-March 2023 to summer 2025

New tunnel construction along 97 Street and connection to the existing upstream combined trunk at 80 Avenue and downstream trunk at 88 Avenue.

Stage one​

Stag​e two

Spring 2025 to fall 2025

Redirecting the existing sewer flows on 80 Avenue between 96 Street to 97 Street toward the new tunnel.

Stage two​

Stag​e three

Summer 2025 to spring 2026

Abandonment of the existing combined trunk from 97 Street to the Mill Creek Ravine.​

Stage three​​​​

Please note that these timelines are estimates and are pending approvals, mat​​erial procurement/availability, construction conditions and weather.

​Causes of ​​possible schedule delays

While we always do our best to plan construction and abide by construction timelines communicated to the public, unexpected events can potentially occur which may delay the schedule. 

Ground conditions and boulders

Geotechnical investigations have been completed along the alignment and we anticipate that the ground conditions are favourable for tunneling. However, there is a risk the TBM could encounter harder soil or boulders, which could slow down progress.​

Extr​​eme weather

Extreme weather including severe cold, heavy rains, high winds and lighting make working unsafe. During these conditions, the site will be shut down.​

Content here

Relocation of existing utilities

The start date of the project is dependent on relocation of the utilities, including a water main at Tubby Bateman Park, as well electricity and telecommunication lines at Ritchie School. Electricity and telecommunication line relocations are anticipated to take place in Q1 of 2023. The watermain relocation is anticipated to take place in Spring 2023. There may be some disruption to local services, however more information will be provided at the time of construction.​

Deli​very of the TBM

The TBM will be delivered from overseas, either from the manufacturer or from another project site. If there are delays with shipping, the tunneling portion of the project may be delayed.​

Content here