The size and configuration of day-ahead markets in the West will greatly impact electricity bills and grid reliability, says the Environmental Defense Fund.

Arizona Public Service notified the Nuclear Regulatory Commission it plans to seek operating license renewals for all three units at Palo Verde Generating Station, potentially extending operations through the mid-2060s.

BPA released its draft proposed decision to join SPP’s Markets+, saying that preparations have advanced to a point where it can “move forward with implementation and propose joining Markets+ in October 2028.”

Two Arizona utilities received approval to convert coal-fired power plants to run on natural gas, projects they say will enhance grid reliability, reduce emissions and preserve jobs.

Arizona Public Service would save $110 million/year by joining CAISO's Extended Day-Ahead Market rather than SPP's Markets+, a new analysis found.

CAISO’s Western Energy Imbalance Market surpassed $8 billion in cumulative economic benefits since its 2014 launch after providing participants with $415.65 million in gross benefits in the fourth quarter of 2025, according to an ISO report.

The Western Power Pool’s WRAP secured enough participants for the program to enter the first binding phase after 11 utilities reaffirmed their commitment.

Four Western utility executives participating in an Energy Bar Association webinar presented their reasoning for why they ultimately chose either SPP’s Markets+ or CAISO’s EDAM, with some eyeing the creation of a full regional transmission organization in the future.

The development of SPP's Markets+ has picked up the pace with stakeholders agreeing on an interim governance structure and representation on the working groups that will handle much of the effort ahead.