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June 2023

We are advising landowners, occupants and residents in your area about plans to add a new building within the existing Castle Downs substation. The substation is located at 16253 97 Street NW (see map), north of downtown Edmonton. See Project Overview​.​​

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Project details

​The Castle Downs Substation is situated at 97 Street and 162 Avenue in the Eaux Claires neighbourhood. 

If approved, the project will involve:

  • ​A new 15 metre by 4.3 metre building within the Castle Downs substation;
  • Adding new switchgear

​EPCOR intends to submit the required application for this project to the Alberta Utilities Commission (AUC) in fall 2023. If approved, the tentative schedule of work would be as follows:

  • ​Construction on the new building is expected to begin in spring/summer 2024 and will take approximately 3 months
  • The project is estimated to be in-service by fall 2024

Please note: These timelines are estimates and may change based on weather, procurement of materials, and construction conditions.

Project map
The illustration shows the proposed work that will be happening at the existing Castle Downs substation in your area. All work will occur within the existing substation boundary. No changes to the substation fence line are required. 

Regulatory process

​About the Alberta Utilities Commission (AUC)

Alberta’s electric utilities are regulated by the AUC. The AUC is an independent quasi-judicial agency that ensures that the delivery of Alberta’s utility service takes place in a manner that is fair, responsible and in the public’s interest. For more information about the AUC, please visit the AUC’s website.

For more information about the regulatory process and how you can participate, please contact:

Alberta Utilities Commission (AUC)
Toll-free: 310-0000
Phone: (780) 427-4903
AUC booklet​​: Participating in the AUC’s independent review process​

About the Alberta Electric Systems Operator (AESO)

The AESO is an independent, not-for-profit organization responsible for the safe, reliable and economic planning and operation of the provincial transmission grid. For more information about why this project is needed, please see the AESO's Need Overview, or visit​​. If you have any questions or concerns about the need for this transmission development you may contact the AESO directly or you can make concerns known to an EPCOR representative who will communicate them to the AESO on your behalf.

For more information about the project need, please contact:

Phone: 1 (888) 866-2969