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Sudbury/Algoma Regional Planning

​A Needs Screening  process was conducted for Sudbury to Algoma in March 2015 by a Working Group led by Hydro One Networks Inc., and including representatives from the IESO, Greater Sudbury Hydro and Hydro One Networks Inc. Distribution.

The Working Group has determined that there are no significant system reliability and operating issues identified for this region. Based on the findings, the recommendations are:

  •  "Localized" wires will address voltage concerns at Manitoulin Transformer Station. Hydro One Transmission and the impacted local distribution companies will address this need.

Current status: With the issuing of the Needs Assessment Report, this completes the Regional Planning process. The Regional Planning process will be undertaken again in 2020, unless there is sufficient load growth or a trigger event that requires the initiating of the  process before that time.


Area overview

The Sudbury to Algoma Region includes Greater Sudbury Area, Manitoulin Island, and townships of Verner, Warren, Elliot Lake, Blind River and Walden.

The total peak demand for Sudbury/Algoma region is approximately 700 MW. The electrical supply for this region is provided through a network of 230kV and 115kV transmission circuits from Hanmer Transformer Station (TS), Algoma TS and Martindale TS. This area is also connected to Northwest Ontario through Mississagi TS.

Sudbury Algoma Map

Map of East Lake Superior