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Project overview and map

Learn more about the transmission work we're doing for this project and where it's located.

Overview and map


Construction phases and timelines

Construction of the transmission line is scheduled to begin in June 2020 and will be completed in 3 phases.

3 construction phases


What to expect during construction

You can expect to experience typical construction activities during this work. Here are the details about what you can expect during construction.

Construction impacts


Construction work and COVID-19

We're closely monitoring the situation related to the COVID-19 outbreak.

Construction and COVID-19



Not sure what some of the terminiology means? Here's a short list of definitions.



Contact us

Contact us for updated information on construction activities and schedules.

Contact us

Project overview

This project involves installing a new above-ground 72 kilovolt (kV) transmission line along 99th Street from the Strathcona Substation (5140 99 Street) to the Dome Substation (2720 Parsons Road), as well as modifications to both the Strathcona and Dome substations. The Strathcona Area Transmission Upgrade Project was approved by the Alberta Utilities Commission on March 8, 2019 (Decision 23641-D01-2019).


Construction phases and timeline

In June 2019, you may have received a project update stating that construction for this project would be completed by May 2020; however, this timeline has changed. Construction on the substation modifications began in December 2019 and the construction of the transmission line is scheduled to begin in June 2020. This project is scheduled to be competed in October 2020.

Construction of the transmission line is scheduled to begin in June 2020 and will be completed in 3 phases:

  • Phase 1: Installation of power poles
  • Phase 2: Construction of the underground duct bank
  • Phase 3: Stringing of the transmission cables

Phase 1: Installation of Power Poles (June - August)

The first step in building the transmission line will be to install the power poles. This will involve excavating holes and using a truck mounted crane to install the poles. Temporary lane closures will be required in the areas where the construction is taking place. Temporary sidewalk closures may also be required to maintain a safe distance from the construction activities.

Phase 2: Construction of the underground duct bank (July/August)

In order to cross existing transmission lines, a small portion of the new line will need to be installed underground (shown on the map in blue). This will involve digging an open cut trench and installing a duct bank to contain the underground transmission cables.  Two steel 'dead-end' structures will be used to transition the line from above ground to underground. Construction of the duct bank will take approximately two weeks to complete; however, additional construction activities in the area, including installing the new poles and pulling the transmission cables through the new duct bank, will continue periodically throughout July and August 2020.

Phase 3: Stringing of the Transmission Cables (August/September)

Once all the new poles are installed, the transmission cables and fibre optic line will be strung. To minimize disruption to businesses and traffic, the cables will be strung in stages. Locations where the stringing will occur will have additional construction activities, such as temporary lane closures and construction equipment.

Timelines and specific stringing locations will be updated on the project webpage once plans are finalized.

​What to expect during construction

While we complete the work for the Strathcona Area Transmission Project, you can expect to see activity that's typical to construction, including company vehicles and equipment in your neighbourhood.

Power outages

Power outages will be required during certain construction activities. You will be provided with at least two weeks notice of any planned power outages.  

Work hours

Typical construction hours will be weekdays and alternating weekends from 9 a.m. to 3 p.m.  If required, these hours may be extended to 8 a.m. to 5 p.m on weekends.


This work will be noisy at times and involve the use of hydrovac trucks, drilling rigs, large trucks, and 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 or go past typical construction hours, we will work with the City of Edmonton to obtain the necessary permits and provide you with advanced notice.

Tree trimming

Some tree trimming and removal will be required along the route. Most of these trees are located on City of Edmonton property. If a tree on your property needs to be trimmed or removed, we will contact you in advance to discuss the required work.


We are committed to public and employee safety. All construction activities will be in accordance with City of Edmonton bylaws, Occupational Health & Safety requirements, and EPCOR's strict health, safety and environment procedures and guidelines. All work areas will be maintained in a safe and secure manner.

​Construction work and COVID-19

We're closely monitoring the situation related to the COVID-19 outbreak. We have plans in place to manage disruptions or emergencies and we are committed to providing the services our communities count on. Protocols have been put in place for our employees while performing essential work to protect the health of our teams and our customers. We also request you take precautionary measures by maintaining a safe, two-metre distance from our crews and contractors.


Substations help convert electricity from higher voltage transmission lines to lower voltages, so it can be used by homes and businesses through distribution lines called circuits.

Transmission Cables, also called conductors, are the wires you see strung on the transmission poles. These cables carry the electricity from substation to substation.

Duct Banks are used to contain underground power cables and protect them from being damaged.

​Contact us

For updated information on construction activities and schedules for this project please contact us.