Arizona Public Service and Puget Sound Energy have met the milestones to participate in the CAISO-run Western EIM and will begin trading in the market on Oct. 1.

The newly established Western Energy Imbalance Market (EIM) governing body kicked off its first meeting last week by electing its leadership.

Berkshire Hathaway Energy affiliates NV Energy and PacifiCorp refunded nearly $95K to customers after FERC revoked their market-based rate authority.

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.

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.