The Western Energy Imbalance Market is poised to make its largest expansion ever next spring with the inclusion of the Bonneville Power Administration.

A meeting to hash out an upcoming Oregon study on RTO membership turned to how the state’s participation might fit into other developments in the West.

WAPA's Desert Southwest Region said it plans to join CAISO's Western Energy Imbalance Market, further splitting the PMA's regions between the ISO and SPP.

The WEIM approved participation by utilities within an entity's balancing authority area — a move intended to convince Xcel Energy Colorado to join the market.

CAISO's Board of Governors and the Western Energy Imbalance Market Governing Body agreed to a new split of authority in which FERC could settle disputes.

The Western Energy Imbalance Market's Governance Review Committee approved its proposal for a new delegation of authority between the EIM and CAISO boards.

The EIM Governing Body elected Jennifer Gardner to replace retiring member Carl Linvill and appointed Anita Decker as its new chair.

The development of a single RTO covering the U.S. portion of the Western Interconnection could save $2 billion a year in energy costs by 2030, study says.

Xcel's Public Service Company of Colorado decided to delay its entry into CAISO's Western Energy Imbalance Market in order to re-examine its decision.

CAISO's EIM provided its members $101.01 million in economic benefits during the first three months of 2021, an increase of 75% over a year ago.