CAISO last week began work on a plan to extend external resource participation in the western Energy Imbalance Market (EIM).

Arizona Public Service and Puget Sound Energy have moved a step closer to linking up with CAISO’s Energy Imbalance Market (EIM).

CAISO provided stakeholders an update on its efforts to address Air Resources Board (ARB) concerns that the EIM is not properly accounting for the impact of emissions.

The western Energy Imbalance Market continued to boost demand for California’s surplus renewable generation last quarter.

CAISO released a revised set of principles for governing a Western RTO in a bid to convince skeptics that an expanded ISO will be amenable to the entire region.

Berkshire Hathaway Energy is contesting FERC’s June decision to revoke the ability of the company’s subsidiaries to sell power at market-based rates.

Utah lawmakers plan to draft a bill requiring PacifiCorp to gain legislative approval before joining an RTO based on an expanded CAISO.

A study suggests CAISO’s expansion into a multistate RTO could save Western ratepayers billions while helping meet emission-reduction goals.

FERC rejected the CAISO proposal to prohibit EIM participants from implementing economic bidding at the market’s external interties.

CAISO stepped up efforts to convert skeptics of a Western RTO, convening a forum in Denver to discuss a proposed set of governing principles.