Regional Electricity Planning-South Georgian Bay Muskoka

Regional electricity planning in the South Georgian Bay/Muskoka region is underway. This engagement initiative will commence at the regional level for the purposes of seeking input on the South Georgian Bay/Muskoka Scoping Assessment Report which may result in initial recommendations for future transformer replacement to address supply capacity issues identified in the Needs Assessment, partial refurbishment at the station and circuits level to meet near-term end of life needs, and actions to address supply capacity constraints emerging in the medium-term before continuing at the sub-regional level to prepare Integrated Regional Resource Plans (IRRPs) for the Parry Sound/Muskoka and Barrie/Innisfil sub-regions. The engagement process will provide interested parties with an opportunity to offer input for consideration into the draft scoping assessment report by November 4, 2020.

Regional electricity plans take a 20-year outlook on every region in the province. The planning process provides an opportunity for communities to tell the IESO about anticipated needs and priorities and to contribute to the development of the options for meeting this region’s future electricity needs.

All interested parties are invited to participate in this engagement initiative and may include but are not limited to:

  • Counties of Simcoe County, Dufferin County, and County of Grey and related municipalities; the Districts of Muskoka and Parry Sound and related municipalities.
  • Indigenous communities including the First Nations of Henvey Inlet, Magnetawan, Shawanaga, Wasauksing, Moose Deer Point, Beausoleil,, Wahta Mohawks, Chippewas of Rama, Chippewas of Georgina Island, and Mississaugas of Scugog 
  • Local distribution companies (LDCs) who serve the community including Alectra Utilities, InnPower, Orangeville Hydro, Elexicon Hydro, Lakeland Power, EPCOR Electricity, Newmarket-Tay Power, Orillia Power, Wasaga Distribution, Hydro One Networks, and the IESO.  
  • Transmitters
  • Consumers and service providers for the area
  • Additional engagement opportunities will be posted for review and comment in early 2021 following the completion of this Scoping Assessment.

South Georgian Bay/Muskoka Technical Working Group- As part of the Technical Working Group consisting of the ten LDCs in the region, the local transmitter, the IESO will use this regional planning engagement initiative to consider input to develop the Scoping Assessment for the region, before continuing the planning process at the sub-regional levels with the respective Technical Working Groups.   

All comments and enquiries about this engagement initiative can be directed to


Related Information



Expected Actions

Q1 2021 Public Webinar #2
  • Update on planning activities underway
  • Summary of preliminary regional demand forecast and needs and draft engagement plan

Presentation materials to be posted

Seek input on draft engagement plan, electricity demand forecast and preliminary needs identified


November 30, 2020

IESO response to feedback

Final Scoping Assessment


November 4, 2020

Feedback due on load forecast, preliminary local needs/issues and timelines


October 14, 2020

Public Webinar #1



  • Overview of the regional electricity planning process in Ontario
  • Update on planning activities underway in the region
  • Overview of draft Scoping Assessment

Next steps

Recorded Presentation

Seek input on draft load forecast, preliminary local needs/issues and timelines

October 8, 2020

Draft South Georgian Bay/Muskoka Scoping Assessment Outcome Report

Posted for public comment 

October 1, 2020

Launch South Georgian Bay/Muskoka Scoping Assessment engagement