Please join us at our upcoming pre-construction Community Information Center on Thursday, September 19. Click here for details.



We’re planning now to meet your community’s future electricity needs

Demand for electricity in the South Nepean area has almost doubled since 2002. Over the next twenty years, electricity needs in your community are expected to more than double once again due to planned residential and commercial development.

In order to ensure that South Nepean has the power to grow, Hydro Ottawa Limited (Hydro Ottawa) and Hydro One Networks Inc. (Hydro One) are planning for new electricity facilities to strengthen the electricity system that serves your community.

Draft and Final ESR

Consultation with elected officials, municipal representatives, government agencies, Indigenous communities, interest groups, and the public is an important part of the Class Environmental Assessment (EA) process. In addition to organized consultation opportunities, we welcome input at any time throughout the project.

As part of the consultation process, a draft Environmental Study Report (ESR) was made available for a 45-day review period. Details of the review process were communicated through various channels, including local newspapers, this project website, and via notifications to project stakeholders.

During the review period if concerns were expressed, Hydro One and Hydro Ottawa attempted to resolve them to complete the EA process. If interested parties were not satisfied with the response, they could submit a written request (Part II Order) to the Ministry of Environment, Conservation and Parks asking for a higher level of assessment (an Individual EA). The Minister of the Environment, Conservation and Parks would decide whether an Individual EA is required. No Part II Orders were received and the ESR has now been finalized.

Power South Nepean Project – Final Environmental Study Report

The final ESR is available to download and view online here.

Power South Nepean Project – Draft Environmental Study Report

The draft ESR is available to download and view online here.



Project Description and Map

The Power South Nepean project proposes:

  • a new municipal transformer station (MTS) that would be owned and operated by Hydro Ottawa and located within the study area shown on the map below; and
  • to rebuild the existing Hydro One 115 kilovolt (kV) transmission line to a new double circuit line with 230 kV capacity. This transmission line would connect the new MTS to the 230 kV line south of West Hunt Club Road, while continuing to supply other stations in the area.

Map Date: November 2018


Determining the need for new facilities

The need for new electricity transmission facilities in the South Nepean area was identified by the Independent Electricity System Operator (IESO), Hydro Ottawa and Hydro One as part of the Integrated Regional Resource Plan (IRRP) for the Ottawa area. The IESO leads the IRRP process with industry partners across different regions in Ontario. The Integrated Regional Resource Plan identifies the region’s unique electricity reliability needs and considers conservation, generation, transmission and distribution, and innovative resources to meet these needs.

The electricity needs of the Ottawa area over the next 20 years and recommended solutions are identified in the IESO’s Ottawa Area Integrated Regional Resource Plan (April 28, 2015) and its Appendices. The IRRP was developed based on consideration of planning criteria including technical feasibility, reliability of the electricity system, cost for electricity ratepayers, and seeking to maximize the use of existing electricity infrastructure, where possible. To learn more about the IESO and regional supply planning in the Ottawa area, please visit:

In addition, Hydro One’s Greater Ottawa Regional Infrastructure Plan (December 2, 2015) was developed in partnership with local distribution companies in the region , including Hydro Ottawa, in accordance with the requirements of Ontario’s Transmission System Code. This plan identifies investments in transmission facilities, distribution facilities, or both, that should be developed and implemented to meet the electricity infrastructure needs within the Greater Ottawa Region.


Anticipated Project Timeline – Updated November 2018

Contact Us

We look forward to working with you to ensure South Nepean has a safe, reliable and adequate supply of electricity to achieve its growth potential.

Please contact our project team at any time for additional information, or if you have any questions. We’d also be pleased to add you to our project contact list to receive future project updates and invitations to consultation events via email.

Telephone:  1-877-345-6799