We use cookies and other web tracking technologies to improve our services, identify areas for repair, better understand what our customers use and don't use, and for marketing services. To learn more, visit our Privacy Commitment.
Skip to main content

Projects > ENMAX Substation No. 1 Replacement Project


ENMAX Substation No. 1 Replacement Project

Project Overview

ENMAX Power Corporation (ENMAX Power) is replacing the existing ENMAX Substation No. 1, located at 738 9 Avenue SW. Originally built in 1912 to power streetlights and the streetcar rail system in downtown Calgary, the new substation is required to ensure the reliability and integrity of ENMAX’s transmission system, and to ensure the reliable supply of electricity to the City of Calgary.

The new ENMAX Substation No. 1 will be built on a site directly west of the existing substation, on the northwest corner, at the 9 Avenue SW and 7 Street SW. In addition to constructing the new substation, ENMAX Power will need to excavate sections of 9 Avenue SW, 7 Street SW, and 8 Street SW to relocate, install and replace transmission lines, duct banks and manholes.

Construction Timeline

  • Installation of safety fencing took place on March 31, 2021
  • ENMAX has now awarded the contract for the Engineering, Procurement and Construction firm who will be responsible for the detailed design and construction of the Project.
  • Based on the construction timelines given by the successful proponent, ENMAX estimates that the start of construction will be delayed to Q2 2022 and will continue until Q2 2025.
  • Decommissioning of the existing substation is targeted to be completed by Q2 2025.

Once construction dates are determined, impacted stakeholders will receive advance notification and additional information. Communication efforts will continue through all phases of the project to ensure timely updates are provided to those impacted.

Important Documents

Contact Us

If you have any questions or wish to discuss this project, please contact us:

Power Customer Relations



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).