Connect New Darlington Project

Energizing Life by Building Safer and More Resilient Communities.

To support energy needs in Durham Region and connect Ontario Power Generation’s (OPG) Darlington New Nuclear Project, Hydro One is initiating a Class Environmental Assessment (Class EA) to build a new 22 km transmission line that can carry up to 500 kilovolts (kV) in the Municipality of Clarington. This project will connect OPG’s Darlington New Nuclear Project to the electricity system.

The proposed transmission line will be located in an existing corridor between OPG’s Darlington facility and Hydro One’s Clarington Transformer Station, as shown on the map below. Once constructed, the new transmission line will look similar to the existing infrastructure in the corridor.

Expected Completion Date

2027

Current Project Phase

Planning

We're here to help you

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

1-877-345-6799 Community.Relations@HydroOne.com
image of power lines

Join Our Upcoming Community Open Houses

Online Open House

View our interactive online open house

Interactive Open House

The Class EA Process

The Class EA will follow the “Class Environmental Assessment for Minor Transmission Facilities” (Class EA, 2022), in accordance with the Ontario Environmental Assessment Act. This process applies to transmission infrastructure projects that are carried out routinely and have predictable environmental effects that can be readily managed to ensure that potential natural, economic, social, and cultural effects are thoroughly considered before a project begins.

Following approval from the Ontario Energy Board under Section 92 (Leave to Construct) of the Ontario Energy Board Act, and the successful completion of the Class EA process, construction would commence in 2024 and be completed by 2027.

Learn More
EA Process Image

Map of Project Area and Route Alternatives

View our interactive map showing the project area and the alternative routes identified for the project, which will be further evaluated in the environmental assessment.

Interactive Map View PDF
darlington route alternatives Enlarge (.PDF)

We Want To Hear From You

Early, meaningful and open engagement is a top priority for Hydro One. Receiving feedback from Indigenous communities, members of the public, businesses, government agencies, and other interested parties will be instrumental to inform all aspects of the Class EA and project. We invite you to join our upcoming Community Open House to learn more about the project, ask our team questions and provide feedback.

Hear From You Image

Public Consultation

February 2023

Notice of Commencement

Download the Notice of Commencement Download the Newspaper Ad

March 2023

View information panels shared at the March 8th Community Open House

Download the Information Panels

Anticipated Project Schedule

February 2023
Notice of Commencement
March 2023
Community Open House #1
2024
Draft Environmental Study Report Release for Public Review and Comment
2024
Finalize Environmental Study Report and project approvals
Late 2024
Construction Begins
2027
Line in Service

We’re here to help You

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

1-877-345-6799 Community.Relations@HydroOne.com