Alberta - British Columbia Intertie Restoration (7006)

The Alberta–British Columbia Intertie Restoration (AIR) Project aims to increase Alberta’s ability to import electricity from British Columbia to strengthen system reliability, resilience, and support continued economic and population growth. Although the intertie was originally designed for higher capacity, long-standing reliability and equipment constraints have limited imports to about 800 MW.

Through targeted upgrades to existing infrastructure the project will restore capacity to approximately 950 MW, in line with provincial policy and Alberta’s Transmission Regulation. AESO’s preferred approach includes building a new substation with series compensation near the existing 500 kV transmission line, called transmission line 1201L, improving line capacity through selective clearance upgrades, and increasing transformer capacity at the Bennett 520S substation, near Langdon, Alberta.

Needs Identification Document

Alberta-British Columbia Intertie Restoration Needs Identification Document [Posted: October 31, 2026]

Appendix A - Planning Report (290,327KB)
Appendix B - TFO Capital Cost Estimate
Appendix C - AESO PIP Summary
Appendix D - AESO Transmission Planning Criteria - Basis and Assumptions
Appendix E - Environment and Land Use Effects Assessment
Appendix F - Letter of Support from BC Hydro

Notice of Filing

The AESO intends to file a Needs Identification Document (NID) application for the approval of the Alberta-British Columbia Intertie Restoration project with the Alberta Utilities Commission (AUC) on or after October 28, 2026.

Key materials

• AIR Project Overview [Posted: June 10, 2026]

Intertie restoration archive

Contact us

If you have any suggestions, questions or concerns please contact Stakeholder Relations at stakeholder.relations@aeso.ca or 1-888-866-2959.