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    About the Grid

    Across Alberta, 26,000 km of transmission lines bring power to over four million people. Working with transmission facility owners, generators and retailers, the AESO ensures the system has enough power. 

    These are the primary transmission facility owners we work with: 

    • AltaLink Management Ltd. 
    • ATCO Electric Ltd. 
    • ENMAX Power Corporation 
    • EPCOR Utilities 

    AIES Map 

    The Alberta Interconnected Electric System (AIES) Map shows a high-level view of the transmission system, including lines, substations, generators and planning areas, overlaid with provincial geographic landmarks.  

    Policy and Regulation 

    The Electric Utilities Act and Transmission Regulation are the key legislative and regulatory documents guiding our transmission planning and grid operations. 

    About the Grid