The transmission system is also interconnected to neighbouring transmission systems through a series of "interties". The interties are high-voltage transmission lines that connect different transmission systems. The BCTC transmission system is interconnected to the transmission networks in Alberta and Washington State as well as other utilities in BC (e.g., Alcan and FortisBC). These interties provide access to other sources of generation, the opportunity for trade, improve the overall reliability of the system by providing backup resources and improve power quality.

Alberta and United States Interties