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​Western Energy Imbalance Market (EIM) participants

The ISO launched the first western real-time energy balancing market on November 1, 2014 with PacifiCorp as the first participant. Since then multiple balancing authorities have started the process to join the market as EIM entities.


Business Practice Manual for Energy Imbalance Market

Salt River Project

Balancing Authority of Northern California/SMUD

Seattle City Light

Idaho Power Company

Portland General Electric

Arizona Public Service​

Puget Sound Energy​

NV Energy