Info icon

Project update

Hydro One has postponed the release of the draft Environmental Study Report (ESR) for the Wawa Timmins Power Line project to allow additional time to complete the review process. We will share updated timing for the public review period when it is available. Any questions can be directed to Hydro One Community Relations at Community.Relations@HydroOne.com or 1-877-345-6799

Northern Ontario

Wawa Timmins Power Line

Hydro One continues to support growth and improve reliability in northeast Ontario. Once built, the Wawa Timmins Power Line will drive economic development and provide a reliable electricity supply to support the substantial load growth expected for the region.

Current project phase: Class Environmental Assessment (EA)

Expected completion date: 2030

Open house resources Contact
Scenic view of a waterfall surrounded by forest, with a walking path, bench, and commemorative plaque in the foreground.

Building a stronger grid for Ontario's future

Project overview

Hydro One is a trusted operator of transmission infrastructure in northeast Ontario. As demand for energy in the region increases, we will continue to support growth and improve reliability. To meet expected needs, we are proposing to construct the Wawa Timmins Power Line, a new single-circuit, 500-kilovolt (kV) transmission line between Hydro One’s Wawa Transformer Station (TS) near Wawa and Porcupine TS in Timmins. The proposed work will also include a station near Wawa.

Project schedule
Family with two children sitting together on a living room floor.

Partnership with purpose

Empowering Indigenous voices through equity and engagement

Feedback shapes our projects at all stages. We will work alongside Indigenous communities, and engage with residents, businesses, government agencies and interest groups to inform all aspects of the Class EA process. Through Hydro One's industry leading 50-50 equity partnership model, we will offer proximate First Nations the opportunity to invest a 50 per cent equity stake in the transmission line component of the project.

Learn more
View of a calm lake with reeds along the shoreline, surrounded by forest and reflected clouds overhead.

See the project study area

Project map

The Wawa Timmins Power Line is a proposed new transmission line in the traditional territories of the Robinson-Superior, Robinson-Huron and James Bay Treaty (Treaty No. 9) First Nations.

Through an evaluation process, the route that best balances all the elements we must consider was selected. These include considerations for the natural and socio-economic environments; Indigenous culture, values, and land use; and technical and cost criteria.

View interactive map Download map (PDF)
Project map

See what's coming

Anticipated project schedule

June 2025
Notice of Commencement for the Class EA.
Summer 2025 until beginning of 2026
Ongoing environmental studies, engagement, feedback and info gathering to help assess route alternatives.
Spring 2026
Selection of preferred route.
Fall 2026
Public comment period for the draft Environmental Study Report.
End of 2026
Submission of the final Environmental Study Report and completion of the Class EA process.
2027
Permitting and mobilization.
Summer 2028
Construction starts.
December 2030
New transmission line is in-service, and construction is completed.
*Dates are subject to change.

Guided by standards

Planning process

Rooted in engagement and consultation, the Class EA identifies and evaluates potential natural, economic, social and cultural impacts before construction can start. The proposed project will follow the Class EA for Transmission Facilities, 2024 (Class EA for TF), established in accordance with the Ontario Environmental Assessment Act.

The Class EA for TF is a streamlined planning process that applies to certain types of frequently occurring transmission infrastructure projects. Projects using the Class EA for TF will identify potential environmental impacts that can be mitigated, planned for and constructed in accordance with a common process. Following completion of the Class EA, the project will also require Ontario Energy Board (OEB) approval under Section 92 (Leave to Construct) of the Ontario Energy Board Act. The anticipated in-service date for the project is 2030.

Learn about the EA process
Participants discussing project information during a community engagement workshop.
Info icon

What these documents mean

These documents summarize the studies, project notices and resources shared during the consultation process. They explain how routes were evaluated, decisions were made and how we engaged with communities.

Contact us

We're here to help

To provide comments or to be added to the project contact list, please call or email:

1-877-345-6799

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​