The Windsor-Essex region is the most southerly portion of Ontario. It consists of the City of Windsor, the Municipality of Leamington, the Towns of Amherstberg, Essex, Kingsville, Lakeshore, LaSalle, Tecumseh, and the Township of Pelee, as well as the western portion of the Municipality of Chatham-Kent. The Windsor-Essex region includes the Caldwell First Nations.

In addition to ensuring adequate supply to the area as a whole, the IRRP focuses on meeting supply capacity requirements in the Kingsville-Leamington area.

Map of Windsor EssexThe region is home to approximately 390,000 people and has a peak electricity demand of approximately 800 MW. The urban portion of the region in and around Windsor has a long history of advanced manufacturing, especially in the automotive sector. This sector is experiencing a slow recovery from the 2008/2009 global recession. In the past, these operations constituted a significant portion of the region's overall electricity demand, but since 2008, these requirements have decreased.

While the manufacturing sector continues to face recovery challenges, economic diversification is changing the region's economy and electricity use. This includes a focus on entertainment tourism in the downtown core, including a resort casino.

The rural portion of the region in Essex County supports a combination of manufacturing and agri-business. Essex County contains the largest concentration of greenhouse vegetable production in North America. This sector is expected to experience major growth in the future, with much of the activity taking place in the Kingsville-Leamington area, increasing electricity supply requirements in that part of the region. Essex County is also home to several large food processing operations, and a growing winery sector.

Community Engagement

The IESO engages with local and regional communities to seek input to help inform planning activities. Learn more about engagement on the current planning cycle.


Regional Planning Activities in Windsor-Essex

Scoping Assessment Outcome Report and Terms of Reference for the Windsor-Essex Region IRRP was finalized and posted in March 2018, following a two-week comment period. Feedback received and the Working Group's response can be found in the Key Resources section below.

The next IRRP for the region is anticipated to be posted in Q4 2019.

Visit Regional Planning Process for more information. See below for past regional planning activities in this region.

Windsor-Essex Technical Working Group

A Technical Working Group will follow the regional planning process to discuss opportunities to identify and meet local electricity needs. For the purposes of this regional planning activity, the Working Group will consist of representatives from the five LDCs in the area - EnWin Utilities, Essex Powerlines Corporation, E.L.K. Energy Inc., Entegrus Powerlines Inc., Hydro One Networks Inc. (also Transmitter), and the IESO.

Bulk Planning Activities in Windsor-Essex

Windsor-Essex bulk report was finalized and posted on June 13, 2019. Visit the Southwest Ontario Bulk Planning Initiatives webpage for more information.

2015 Regional Planning Process Outcome

In the near and medium term, demand in the Kingsville-Leamington area has exceeded supply capacity. A large portion of the study area does not currently comply with the prescribed Ontario Resource and Transmission Assessment Criteria (ORTAC) restoration criteria. A recommended plan to build a short transmission line and a new transformer station near Leamington in combination with refurbishment work at the Kingsville and Keith stations will address the needs identified for the area.

No long-term needs were identified at this time. The next regional planning process is scheduled to begin in 2018.

2015 Windsor-Essex Area IRRP

2015 Windsor-Essex Area IRRP - Appendix

Key Resources


Terms of Reference

Planning Process Working Group Report to OEB

Supporting Evidence to Hydro One's Section 92 for SETCR

Supporting Evidence for Recommended Cost Allocation Treatment for SETCR

Hydro One Regional Planning