Hydro One has initiated a Class Environmental Assessment to install a temporary 115 kilovolt (kV) bypass transmission line between the communities of Westover and Copetown in the City of Hamilton.

The temporary wood pole line will be approximately 13 kilometres in length and will largely run parallel to the existing 500 kV double-circuit line. It will be used to maintain a safe and reliable supply of power to the Enbrg Westover S Customer Transformer Station (CTS).

Based on our work to date, it has been determined additional technical studies are required for the project. As a result, the Class EA has been extended to summer 2020. This extra time will ensure Hydro One is aware of the predictable range of effects from the project and that feasible environmental mitigation and/or protection measures are in place.

Due to the extension of the Class EA, Hydro One anticipates work on the temporary transmission line to begin in fall 2020. The line will be installed for a duration of approximately two years.


Map of the Westover to Copetown project study area
Click to enlarge (.PDF)

The Process

The Westover to Copetown Temporary Transmission Line project is subject to the Class Environmental Assessment for Minor Transmission Facilities (Hydro One, 2016) process, which is in accordance with the Ontario Environmental Assessment Act. This process is in place to ensure transmission projects that have a predictable range of impacts have feasible environmental mitigation and protection measures in place. The process contains screening provisions that may apply to the Westover to Copetown project.

Community Engagement

Community engagement and consultation is important to Hydro One. We are committed to keeping community members informed about important infrastructure projects like this one. Hydro One is providing notification of the project to government agencies, municipal officials, Indigenous communities, potentially affected property owners, and other local stakeholders.

Download the Notice  


Public Information Centres

Hydro One hosted a Public Information Centre (PIC) on July 31, 2019 to share information about the proposed project and to gather feedback from community members. The PIC was held at the Westover Women's Institute Hall at 1355 Concession Road 6 W in Westover Village. Information panels were displayed at the PIC.


Project Timeline

  • MAY2019
  • Notice of Commencement for Class Environmental Assessment

  • JULY
  • Public Information Centre

  • SUM-
  • Class Environmental Assessment completed

  • FALL2020
  • ​Anticipated start of construction

  • MAY2021
  • ​Target in-service date

  • FALL2022
  • Planned removal

Contact Us

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

Community Relations
Hydro One Networks Inc.

Tel: 416-345-6799 or 1-877-345-6799

Fax: 416-345-6984