Your browser is no longer supported

To get the best experience with, we suggest using a newer version of Internet Explorer/Edge, or using another supported browser such as Google Chrome.

ETS users may continue to log in using Internet Explorer 9 using the upper right hand link marked ETS Login.

    View all projects

    Sunnybrook and Livock Substation Modifications

    On August 13, 2015, the AESO filed its Needs Identification Document (NID) for modifications to the existing Sunnybrook and Livock substations, with the Alberta Utilities Commission (AUC). On November 19, 2015, the AUC approved the AESO’s NID.

    Please see the documents below for more information on the need for this development.

    AltaLink Management Ltd (AltaLink) and ATCO Electric Ltd (ATCO) are the transmission facilities owners (TFO) in the area. While the AESO is responsible for identifying that transmission system development is needed, AltaLink and ATCO are responsible for detailed siting and routing, constructing, operating and maintaining the associated transmission facilities. The TFOs are currently in the process of obtaining their required regulatory approvals. Please visit AltaLink’s website at and ATCO’s website at for further information.

    Key documents

    Contact us

    Please contact us directly with questions or comments about the need for this transmission reinforcement at 1-888-866-2959 or