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​Upcoming electricity projects

What's happening

EPCOR is responsible for building, maintaining, and upgrading the electrical transmission and distribution system in Edmonton. As the system ages, the electrical infrastructure requires maintenance and upgrades to ensure the safe, reliable delivery of power.

Within the next six months, EPCOR will complete four electricity projects in the Rossdale area:

• The Transmission Cable Thermal Backfill Project

• The Rossdale Substation Breaker Replacement Project

• The Bellamy Substation Transformer and Containment Pit Repair Project

• The Rossdale Substation Cable Termination Replacement Project


Transmission Cable Thermal Backfill
​This summer, EPCOR will perform maintenance on an underground transmission cable near the Rossdale Substation. Certain soil types can cause transmission cables to overheat and shorten their life expectancy. This project will involve changing the type of soil backfill around the cables to increase heat transfer, so the cables do not overheat and can operate at optimal levels.

To complete the work, we will excavate around the transmission cables located in the southwest corner of River Valley Road (95 Avenue) and 105 Street (shown in dark blue on the map). A hydrovac truck will be used to excavate five feet below the ground to remove the existing backfill material. Once the old backfill is removed, the new high thermal backfill material will be put in place. This work is scheduled to begin at the early September and will take approximately two days to complete.

Due to the sensitive nature of the area, we will work with archaeology experts to monitor any ground excavations that occur on this project.

During construction, you may notice temporary traffic disruptions to River Valley Road and 105 Street as equipment is brought in and out of the site. In addition:

• The multi-use trail south of River Valley Road will be closed. Pedestrians and cyclists will be detoured around the work area.

• Signage will be used to manage traffic and notify pedestrians/cyclists of any necessary detours.

• All affected landscaping, pavement, and sidewalks will be restored to their original condition. Restoration will take place between August and September, as weather permits.

Rossdale Substation Breaker Replacement

Two breakers in the Rossdale substation are nearing the end of their useful life and need to be replaced. The new breakers will be placed in the same location as the old breakers (as shown on the map in yellow).

One breaker will be replaced in August and the other breaker will be replaced in September of this year. It will take approximately eight weeks to replace both breakers.

Bellamy Substation Transformer and Containment Pit Repair

​One of the transformers in the Bellamy Substation is in need of repairs (shown in orange on the map). Repairs will include removing the oil from the transformer, replacing gaskets, processing the oil, and re-filling the transformer. Prior to the transformer repairs, the containment pit around the transformer will be replaced. Containment pits help protect the soil in the event of an oil leak.

Repairs will begin in September 2020 and the work is expected to take approximately 14 weeks to complete. Ground disturbances are required to complete this project and a Historical Resource Impact Assessment (HRIA) will be conducted prior to starting construction. The HRIA will determine if archaeology experts are required to monitor the site during construction.

Rossdale Substation Cable Termination Replacement

A high-voltage cable termination inside the Rossdale Substation is nearing the end of its useful life and needs to be replaced. Substations are a part of the electrical system and are generally connected by two or more high-voltage transmission lines. The Rossdale Substation converts electricity from high-voltage power lines (transmission lines) to lower voltages that can be distributed to homes and businesses in the area. A cable termination is the specific point in the system at which the cable starts or ends. The cable termination being replaced is shown on the map in green.

To complete this project, crews will work 24 hours a day, 7 days a week. This project will require the use of a generator, which will produce noise similar to an idling car. This work is expected to begin in in the Fall/Winter 2020 and will take approximately six weeks to complete.


The Transmission Cable Thermal Backfill Project - September 2020 (2 days)

Rossdale Substation Breaker Replacement Project - August/September 2020 (8 weeks)

The Bellamy Substation Transformer and Containment Pit Repair Project - September – December 2020 (14 weeks)

Rossdale Substation Cable Termination Replacement - October/November 2020 (6 weeks)

With the exception of the Rossdale Substation Cable Termination Replacement Project, we anticipate our hours of work for these projects to be Monday to Friday 7:30 a.m. to 5:00 p.m.; however, occasional evening and weekend work may be required.

Construction impacts


This work will be noisy at times and involve the use of hydrovac trucks and other heavy machinery. We will comply with the City of Edmonton's Community Standards Bylaw for Noise Control. If it is necessary to temporarily exceed acceptable noise levels, we will work with the City of Edmonton to obtain the necessary permits.

Power outages

We do not anticipate any planned power outages as a result of these projects.


All work areas will be maintained in a safe and secure manner. All construction activities will be performed in accordance with the City of Edmonton's bylaws, Occupational Health and Safety requirements and EPCOR's strict health, safety, and environmental procedures and guidelines.

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