SPP’s Western Energy Imbalance Service market saw “very limited growth” in its first 13 months, SPP’s MMU said in its first annual report on the market.

SPP regulators have approved a recommendation for three DC ties that will connect the RTO’s Eastern and Western Interconnection footprints.

SPP is continuing its delicate dance with Western utilities with a charm offensive that includes a first-hand look at the RTO’s sausage-making process.

CAISO issued a straw proposal for its extended day-ahead offering in the Western Energy Imbalance Market, a renewed effort at greater Western regionalization.

A group of Western utilities plans to help SPP develop its Markets+ program in the West and to examine the benefits of joining it or CAISO's day-ahead market.

SPP says its Markets+ day-ahead offering in the Western Interconnection is on track to be completed by the end of the year.

SPP said it plans to close its Western Energy Imbalance Service, with members joining either its proposed Markets+ program or its Western RTO.

CAISO, SPP and the Western Power Pool are all maneuvering to organize the Western electricity sector, and conditions finally seem ripe for change.

CAISO's Western Energy Imbalance Market hit a record $739 million in member benefits in 2021, putting its total close to $2 billion since it launched in 2014.

Public Service Company of Colorado, Platte River Power Authority and Black Hills Colorado Electric said they plan to join SPP’s WEIS market in April 2023.