11 of the biggest projects in the works for Ontario

It’s all about power, movement and preserving the past.

Major work is being done to transform how Ontario residents move around the province and power their homes. Nearly all of biggest projects revolve around transit and two projects on this list are significant nuclear power upgrades that will impact the region for decades. Keep reading to see how the lives of Ontario residents are set to change in the coming years.

11. Ottawa LRT (Stage 2) – $4.6 billion

The nation’s capital will soon have 44 kilometres of rail and 24 new stations for its LRT system. Last year saw stations taking shape, rail installation advancing, and trains on track for testing. However, it hasn’t been without some snags. Reports to the city show the project is running a year-and-a-half behind schedule because of labour and cement shortages and is now expected to be delivered in late 2026. Construction is being carried out by Kiewit and Vinci. Design engineering services is being provided by WSP Canada Inc. and Hatch Ltd.

10. Eglinton Crosstown West Extension – $4.7 billion

The extension of the Eglinton Crosstown LRT will run 9.2 kilometres from the future Mount Dennis LRT station to Renforth Drive and will operate mainly underground. Once complete, it will create a continuous rapid transit line that stretches from Scarborough, through midtown Toronto, and into Mississauga. In 2021, officials awarded a fixed-price contract of $729.2 million to West End Connectors (Aecon Infrastructure Management Inc., Dragados Canada Inc., Ghella Canada Ltd.) to design, build and finance the tunnels. Last month these tunneling efforts reached the halfway mark. plans are also being explored to extend the line to Pearson International Airport.

9. Centre Block Rehabilitation – $5 billion

Centre Block; House of Commons Foyer; Graham Forster assesses condition of stone frieze; Masonry Conservator; Capital Conservation Services (CCS); iPad.

Following an Auditor General’s report that predicted the Centre Block would experience “total failure” sometime between 2019 and 2025, officials embarked on the largest, most complex heritage rehabilitation project ever seen in Canada. The design lead is CENTRUS and the construction management is being done through a partnership between PCL and EllisDon. According to the latest progress report, the team aims to complete construction between 2030 and 2031. The Centre Block will reopen about one year later.

8. Hurontario LRT – $5.6 billion

Once in service, the 18-kilometre Hazel McCallion Line (Hurontario’s name once it is completed) will bring a new method of transportation to a rapidly growing region. The new transit system will feature 19 stops, travel through two urban growth centres and connect to major transit systems including GO Transit (Milton and Lakeshore West lines), the Mississauga Transitway, Brampton Transit, ZUM and MiWay. The Hazel McCallion Line will operate in its own dedicated lane. Mobilinx, a consortium of local and international companies, was awarded the contract to design, build, finance, operate and maintain the system. Major construction began in spring 2020 and the expected completion is fall 2024.

7. Gordie Howe International Bridge – $5.7 billion

This January was an epic month for the Gordie Howe International Bridge project, marking the beginning of the stay cable installation. In total, the bridge will feature 216 stay cables, 108 on each side. The structure will be a six-lane crossing of the Detroit River connecting Detroit, Michigan with Windsor, Ont. When completed, the 1.5-mile crossing will be the longest cable-stayed bridge in North America, with a main span of .53 mile. The bridge will also feature a nearly 12-feet-wide pedestrian/cycling path. The project also includes building new ports of entry that will connect to both the American and Canadian bridge termini, as well as onward connections to I-75 in southwest Detroit. The project is being delivered by a consortium that incldues ACS Infrastructure Canada Inc., Fluor Canada Ltd. and Aecon Concessions.

6. GO Expansion Projects (Early Works) – $10.5 billion 

While the main work on the GO Expansion has yet to begin, over $11 billion of early works and off-corridor projects are already underway, including station renovations, expansions and improvements, grade separations, bridge and tunnel expansions and maintenance facilities.

5. Ontario Line – $10.9 billion

There is a strong argument that this project should be further down this list. While its original cost estimate is $10.9 billion, Infrastructure Ontario believes it could be much closer to $19 billion. Last fall, two massive contracts were awarded for the line: a $9 billion contract to the Connect 6ix team to design, build, finance, operate and maintain the Ontario Line rolling stock, systems, operations and maintenance (RSSOM) package; a $6 billion package to Ontario Transit Group package to deliver the rail project’s tunnel, seven stations and other rail infrastructure. The subway line will bring 15 new stations to the city and will run from Exhibition Place, through the heart of downtown, all the way to the Ontario Science Centre.

4. Eglinton Crosstown LRT – $12.5 billion

This work will create a midtown connection between east and west Toronto. With 25 stations along the dedicated route, officials say it will make getting across town will be up to 60 per cent faster. In 2016 Crosslinx Transit Solutions began work. The group has a $9.1 billion, 30-year alternative financing and procurement (AFP) contract to finance, build, and maintain the line. Its team includes EllisDon, Aecon, Dragados, SNC-Lavalin, IBI Group and many others.

3. Darlington Nuclear Refurbishment – $12.8 billion

In 2016, after years of detailed planning and preparation, Ontario Power Generation’s team shut down the first of four Darlington reactors scheduled for refurbishment over the next 10 years. Officials say the project continues to progress on time and on budget. The refurbishment and the subsequent 30 more years of station operation are expected to generate a total of $89.9 billion in economic benefits for Ontario, create 14,200 jobs per year, and boost personal income by an average of $1.6 billion on an annual basis. Work on the first four units is expected to wrap in 2026. Darlington will also be the site of a historic small modular reaction project.

2. Bruce Power Refurbishment – $13 billion

Another upgrade to the province’s nuclear infrastructure, this project will overhaul all eight of the units of the 6.2GW Bruce Nuclear Generating Station. The largest plant of its kind in the country, Bruce was originally constructed by Ontario Hydro between 1970 and 1987. Early project work began in 2016 and the refurbishment of unit 6 is expected to wrap in 2024.

GO Expansion (On-Corridor Works) – $15.5 billion

The On Corridor Works project is the largest capital infrastructure project in Ontario’s GO Rail Expansion program. On Corridor work includes all works that facilitate train service, such as track, civil infrastructure, signalling, electrification infrastructure and electric vehicles, as well as the operations and maintenance of the GO rail network. Last April, the project contract was awarded to ONxpress, a group that includes Aecon, ALSTROM, FCC Construction S.A, and DB International Operations. ONxpress is responsible for designing, building, operating and maintaining all GO Rail infrastructure and trains for 25 years.


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