East-West Tie Transmission Project (EWT)



The East-West Tie Transmission Project (the Project) in northwestern Ontario consists of an approximately 280-mile (450-km), double-circuit, 230-kilovolt (kV) transmission line.

The line connects the Wawa Transformer Station to the Lakehead Transformer Station near Thunder Bay, ON, including a connection midway in Marathon, ON.

The project was developed by NextBridge Infrastructure (NextBridge), a partnership between affiliates of Enbridge, NextEra Energy Canada and OMERS Infrastructure.

NextBridge consulted with all interested community members, First Nations and Métis communities, elected officials and municipal staff, agencies, landowners and other stakeholders in a clear and mutually respectful manner throughout development, and will continue to work closely with community partners throughout the life of the project.

NextBridge is working with Indigenous communities along the project right-of-way to provide sustainable benefits to those communities. This project represents the first Indigenous equity partnership for Enbridge, with the six most proximate Indigenous communities owning 20% of the project. During construction, the project provided more than $200 million in economic benefits to local Indigenous communities and businesses, and up to 60% of the workforce were Indigenous workers.  These efforts helped us secure the support of the Indigenous and Métis communities engaged for the project.  We are proud of the trusting relationship we forged by working together in a respectful way.

The Project is required to ensure the long-term reliability of the electricity supply in northwestern Ontario. Industrial activities in the area, particularly in the mining sector, are expected to drive strong electricity demand growth in the coming decade. Coupled with changes to the electricity supply in the area, the Independent Electricity System Operator (IESO) has identified supply needs for northwestern Ontario, which can be met with additional transmission or generation.

Construction of the project began in September 2019 and the project entered operation in March 2022.

For more information on the new East-West Tie project, please visit NextBridge.ca

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Project overview:

  • Type: Power transmission line
  • Status: In operation
  • Length: 280 miles (450 km)
  • Capacity: 230 kV