March 10, 2025

Western Energy Imbalance Market (WEIM)

WW Clyde
Is NV Energy Leaning to CAISO’s EDAM?
An NV Energy executive provided the strongest public indication yet as to why the utility is poised to choose the ISO's Extended Day-Ahead Market over SPP’s Markets+.
PacifiCorp
FERC Denies PacifiCorp Formula Rate Change
FERC rejected PacifiCorp’s request to include in its Open Access Transmission Tariff the interest it pays when refunding advance payments such as interconnection study deposits.
DOE
Nevada Power Exempted from Market Power Filing Requirement
FERC granted Nevada Power an exemption simplifying the NV Energy subsidiary’s filing of its triennial updated market power analysis.
© RTO Insider LLC
Seams Concerns Won’t Drive Day-ahead Market Decision, BPA Says
BPA’s choice of a day-ahead market will not be driven by concerns about the impact of the seams that would divide the two markets proposed for the West, an agency official made clear.
CAISO
WEIM Q1 Benefits Report Adds to NW Cold Snap Debate
CAISO’s first-quarter benefits report offers another footnote to the debate over the market’s role in the response to the January deep freeze that brought parts of the Northwest to the brink of rolling blackouts.
PacifiCorp
SPP Markets+ Tariff Sparks Concerns for PacifiCorp, NV Energy
Although PacifiCorp formally committed to joining CAISO’s Extended Day-Ahead Market, the utility is still voicing concerns about a competing day-ahead market, SPP’s Markets+, in a FERC filing. 
PacifiCorp
PacifiCorp Fully Commits to CAISO’s EDAM

PacifiCorp said it will sign an implementation agreement to join CAISO’s EDAM, making it the first entity to formally commit to either of the two day-ahead markets being offered in the West.

West-Wide Governance Pathways Initiative
Past Opponents Now See Legislative Pathway to CAISO Regionalization
Reps from two groups that blocked past efforts to “regionalize” CAISO predict success for an upcoming campaign to change California law to allow the ISO to participate in an independent RTO.
WECC
26 Western Entities Signal Continued Support for Markets+
More than two dozen Western electricity sector entities sent a letter to SPP expressing support for the continued development of the RTO’s Markets+, which is competing for participants with CAISO’s Extended Day-Ahead Market. 
West-Wide Governance Pathways Initiative
Western RTO Group Floats Independence Plan for EDAM, WEIM
Backers of an initiative to create an independent Western RTO that builds on CAISO’s markets have floated a plan to untangle the snag that’s hung up past efforts to “regionalize” the ISO: a lack of independent governance.

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