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​​We are proposing to construct and operate a new substation in southwest Edmonton near the Anthony Henday Drive, just east of Maskêkosihk Trail (formerly 184th Street). Have a look at the latest information.

December 2017 Project Update

In September 2017, we detailed two potential sites for the Riverview substation: Site A, which was the original location we proposed in November 2016, and the new Site B location, which is approximately 170 metres west of Site A.

Following consultation with stakeholders, we have now submitted a facility application to the Alberta Utilities Commission (AUC), with Site B as our preferred location. The AUC will now review our facility application, as well as the Alberta Electric System Operator's Needs Identification Document. The AUC must approve both before EPCOR can begin work.

For more information about how you can participate in the process, please visit the AUC website.

Project overview

Southwest Edmonton has experienced a considerable amount of growth over the past few years and the demand for electricity is forecasted to increase as further residential and commercial development occurs in the area. The increased demand for electricity is forecasted to cause capacity constraint that will limit EPCOR's ability to deliver reliable power to the area. To resolve this issue, we are planning to construct a new substation in the transportation utility corridor near the Anthony Henday Drive, just east of Maskêkosihk Trail (formerly 184th Street).

Proposed Riverview substation

The proposed Riverview substation will address capacity constraints and allow us to continue to provide reliable power to homes and businesses in the growing area of southwest Edmonton. This project must be approved by the Alberta Utilities Commission (AUC) and if approved, the fenced boundary of the proposed Riverview substation site will be approximately 100 metres by 100 meters and will include the following equipment:

  • Two 240 kV/25 kV transformers

  • Four 240 kV circuit breakers
  • Associated switches and equipment
  • Installation of a chain link fence to enclose the new substation site

We also plan to apply for, construct and own 2 adjacent transmission lines, both approximately 70 metres in length, to connect the substation to AltaLink’s 1043L (to be renamed 1139L and 1164L) transmission line. These were originally proposed by AltaLink.


AltaLink proposes to install steel monopole structures, approximately 20 to 35 metres tall, on the 1043L line to accommodate this connection. Please contact AltaLink for more information regarding alterations to transmission line 1043L (to be renamed 1139L and 1164L):

Call: 1 (877) 267-1453 (toll-free)

What's a substation?

Substations are where electricity is stepped down from high voltage electricity to lower voltage that can be used in our homes and businesses. Substations can include equipment such as transformers, circuit breakers, current limiting equipment and communications equipment.

Construction details

​Substation site selection

During the process of determining potential sites, we take the following factors into consideration in an effort to find a location with the lowest overall impact:

  • Agricultural
  • Residential
  • Environmental
  • Electrical
  • Cost
  • Visual
  • Safety

Along with these factors, the proposed substation site was selected because it is within a designated utility corridor, in close proximity to connect to existing transmission lines, provides sufficient access for construction and maintenance vehicles, minimizes environmental impacts, and has adequate setback from existing development.

Work space

All work areas will be safe and secure. All construction activities will be in accordance with the City of Edmonton bylaws, occupational health and safety requirements, as well as EPCOR's health, safety and environmental procedures and guidelines. If this project is approved, we will require temporary workspace around the proposed substation site and a temporary access trail from Maskêkosihk Trail to access the site during construction.

Project area

​Since our initial project mail out in November 2016, we have conducted personal consultations with landowners, occupants, residents and interested parties located in the vicinity of the proposed substation. Thank you to everyone who took the time to share your comments and input with us on the project.

As a result of the feedback from stakeholders, we are considering a second substation location (Site B) located approximately 170 metres west of the originally proposed location (Site A). Site B is located closer to Maskêkosihk Trail but still within the Transportation/Utility Corridor. We’ve also identified a proposed access route and temporary workspace area for Site B. We will include both potential substation locations in its application to the Alberta Utilities Commission (AUC). If approved, only one substation will be built, but either of the filed site options could be selected by the AUC.

Note: 1139L will be west of Riverview and 1164L will be east of Riverview. If the project is approved, only one substation will be built. The maps show both substation locations currently under consideration.


Regulatory process

​Our public consultation program began in November 2016 with our project team reaching out to landowners, occupants, and residents who are directly adjacent to the proposed substation site, as well as other stakeholders.

Consultation is ongoing. If you have questions, concerns or feedback, please contact us using the information at the top of this page.

Once we have received input from the public, we will submit a facility application to the AUC for approval to construct the new substation. This project requires two regulatory approvals from the AUC: approval of the Alberta Electric System Operator's (AESO) Needs Identification Document (NID), and approval of EPCOR's facility application.

Updated project schedule


For more information about how you can participate in the process, please visit the AUC website or see the contact information below.

About the Alberta Electric System 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 update, 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:

Alberta Electric System Operator (AESO)
Phone: 1-888-866-2959

You can also make your questions or concerns known to an EPCOR representative who will collect your personal information for the purpose of addressing your questions and/or concerns to the AESO. This process may include disclosure of your personal information to the AESO.

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: Public involvement in a proposed utility development