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Foothills Area Transmission Development East

Communities in SE Calgary​​


​The Alberta Electric System Operator has identified the need to strengthen the transmission system within Calgary and the communities south and east of Calgary. Transmission development is required to:

  • Ensure the transmission system will meet growing demand in developing areas and maintain a reliable supply of electricity, and
  • Ensure power from new generation plants, including gas and wind power, is connected to Alberta's electric system

The existing electrical transmission system in Calgary and the communities south and east of Calgary has not had a major development or upgrade since 1985, while the population in these communities has grown substantially.

Project Update

The Alberta Utilities Commission (AUC) issued Permit and Licence on October 28, 2013 for alterations to Sub 25 and Sub 65.


Email: stakeholderrelations@enmax.com Phone: 403-514-1471

This project involves efforts from both ENMAX Power Corporation and AltaLink. We are working together as the proposed project includes work in the operating areas of both companies.




Proposed Addition to ENMAX No. 25 Substation*

To enable power generated from Shepard Energy Centre (SEC) to flow into the existing electricity grid, AltaLink has proposed new transmission lines in the area. To accommodate the interconnection between the SEC and the new transmission lines, ENMAX Power is proposing to install and configure protective equipment within the proposed No. 25 Substation. The protective equipment would be located inside the control building within the substation yard, therefore no visible changes would be apparent.

*ENMAX No. 25 Substation is to be located directly adjacent to the future Shepard Energy Centre, and will act as a switching station.


Proposed Addition to ENMAX No. 65 Substation*

AltaLink is proposing two new 240kV transmission lines from a proposed substation in the High River area to ENMAX Substation No. 65. To accommodate these new transmission lines, ENMAX Power is proposing to install additional equipment at the future No. 65 Substation. This additional equipment would be installed within the fenced substation yard.

*ENMAX No. 65 Substation is a new substation located near the intersection of Highway 22X and 88 Street SE.

The proposed additions require regulatory approval by the Alberta Utilities Commission (AUC).

ENMAX Power will be submitting their applications in May 2012. Should the proposed projects be approved, ENMAX Power expects construction to begin in July 2013.


Customers are free to purchase natural gas services or electricity services from a retailer of their choice. For a list of retailers, visit ucahelps.alberta.ca or call 310-4822 (toll free in Alberta).