Portland-based PacifiCorp has just slipped into California’s high-stakes power game, becoming the first utility from outside the state to join the California Independent System Operator’s new Extended Day-Ahead Market. The market, known as EDAM, went live on May 1 and is built to coordinate day-ahead planning across a wider Western footprint to smooth out prices and shore up reliability. PacifiCorp says tapping a larger pool of generation and transmission should help cut costs for customers while making it easier to fold more renewable energy into the mix.
EDAM launches and who’s in
The May 1 go-live marked the first time organized day-ahead trading has stretched beyond California into the broader West, replacing some of the ad-hoc, last-minute scheduling that used to happen in real time. PacifiCorp said the market builds on the Western Energy Imbalance Market and will initially feature PacifiCorp as the inaugural non-California participant, with Portland General Electric set to join in October 2026 and several other entities already…..