A group of nonprofits suing BPA said its decision to join SPP’s Markets+ instead of CAISO’s EDAM “violated clear mandates from Congress.”

SPP named Tim Vigil, chief member relations and strategy officer for Pacific Northwest Generating Cooperative, as director of the Market Monitoring Unit’s office dedicated to Markets+.

SPP’s Market Monitoring Unit says in its latest report that the Western Energy Imbalance Service market’s average load energy prices rose “significantly” during the spring quarter of 2025.

DOE has terminated its $4.9 billion conditional loan commitment for the long-delayed Grain Belt Express project, saying it is “not critical” for the federal government to support the project.

Tri-State asked the Colorado Public Utilities Commission to find it would be in the public interest for the power supplier to join SPP, saying integrating with the RTO would bring significant benefits.

FERC accepted SPP's proposed tariff revisions that will incorporate seven Western Interconnection entities as transmission-owning members of the RTO.

FERC issued a deficiency letter over SPP’s proposed revisions to its tariff, bylaws and membership agreements intended to facilitate nine western entities’ RTO membership as transmission owners.

CAISO scored a geographically small but symbolically significant victory with the announcement that two Black Hills Energy subsidiaries will move to the ISO’s Western Energy Imbalance Market.

FERC accepted SPP’s revisions to its WEIS market tariff related to the residual supply index and ensuring that affiliated market participants’ resources are evaluated together.

The Colorado Public Utilities Commission has proposed rules that would govern how it will review applications from utilities wishing to join the various regional markets being developed in the Western Interconnection.