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Project Overview 


We received approval from the Ontario Energy Board (OEB) to build new transmission facilities in the Leamington area. The facilities are:

  • a new TS on our property on Mersea Road 6 adjacent to the municipal utility corridor in the Municipality of Leamington; and

  • a new 13 kilometre double circuit 230 kilovolt (kV) transmission line on a new corridor to connect the station to the existing 230 kV transmission line south of Highway 401 in the Town of Lakeshore.


The site for the Leamington TS and proposed route for the connector line were identified during the Class Environmental Assessment (EA) and public consultations we conducted from 2007-2010 for the Supply to Essex County Transmission Reinforcement Project. In 2010, the Class EA was completed and the final Environmental Study Report (ESR) was submitted to the Ministry of the Environment.

Due to economic conditions at that time, it was decided that Hydro One not seek approval to construct the project until the Ontario Power Authority (now the Independent Electricity System Operator) had an opportunity to further review the long-term electricity needs of the Windsor-Essex area. The Ontario Power Authority, in its regional supply planning discussions with our team and local distribution companies (LDCs) in the Windsor-Essex area, identified the need for these new facilities.



Project Timeline

  • JUL2010
  • Completion of Class Environmental Assessment (EA) Process

  • Jan2014
  • Submission of “Leave to Construct” application to the Ontario Energy Board, in accordance with Section 92 of the Ontario Energy Board Act, 1998.

  • Jul2015
  • OEB approval

  • Mar2016
  • ​Start of site preparation at the Leamington Transformer Station Site

  • Jan2017
  • Start of Construction for the new Transmission Line​

  • Sum2018
  • ​Target in-service date for the new facilities

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Project Approvals

Learn more about the work we have completed to ensure provincial approval for this project.

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Public Consultation

Learn more about the Public Information Centres (PICs) we conducted to support this project.

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Maps and Diagrams

View maps and diagrams related to this project.

View Maps and Diagrams

Contact Us


For more information or to be added to the project contact list, please contact:


Carrie-Lynn Ognibene
Community Relations
Hydro One Networks Inc.


Tel:  1-877-345-6799

Fax: 416-345-6984

community.relations@hydroone.com