East-West Tie Line Project

The Northern Ontario East West Tie (EWT) project is a proposed 248 mile (400km), 230kV transmission line from Wawa to Lakehead substation near Thunder Bay, Ontario, with a continuous carrying capacity of 466 MWA. A report from the Ontario Energy Board has concluded that this project is a cost effective way to meet forecast energy demand in Northern Ontario; increase reliability in the region; allow retirement or conversion of coal generation facilities in Northern Ontario; and improve flexibility for additional renewable generation. The project will be completed in two segments. The first is from the Wawa TS to Marathon TS, while the second will consist of the line between the Marathon TS to the Lakehead TS.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Upper Canada Transmission 280 230 ON ON 2021
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
777 Double Under Construction CTI Wawa Lakehead
Interstate Build Start NERC ISO/RTO Country Project Partners
No 2019 NPCC OIESO CA NextEra Energy Canada, Enbridge Inc. and Borealis Infrastructure Management