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April 5, 2026

Western Energy Imbalance Market (WEIM)

FERC Clarifies Western EIM Order
FERC reaffirmed its rejection of a proposed net export limit to help the Western EIM avoid unintended consequences of market power mitigation.
EIM Lands Xcel, Three Other Colorado Utilities
Xcel Energy, Black Hills Colorado Electric, Colorado Springs Utilities and Platte River Power Authority announced they will join CAISO's EIM.
NIPPC Members ‘Carry On’ Without Kahn
Sadness over the recent death of Robert Kahn suffused this year’s NIPPC annual meeting, where speakers remembered and praised the energy veteran.
EIM Attracts More BANC Members, WAPA Region
Three BANC members and WAPA’s Sierra Nevada division jointly announced they intend to join CAISO's Western Energy Imbalance Market.
Isolation, Illiquidity Drove Avista’s EIM Decision
Avista's [NYSE:AVA] Scott Kinney explained the factors that led to the utility's decision to join CAISO's EIM during the market’s Regional Issues Forum.
EIM Governing Body Gains Member, Loses Another
The EIM Governing Body voted unanimously to confirm new member Anita Decker, but Chair Carl Linvill also announced the resignation of member Travis Kavulla.
Customers Probe BPA on EIM Impact
BPA dispelled lingering doubts about its intent to join the Western EIM, but will take time to address stakeholders about how the move will affect them.
CAISO OKs EIM Governance Review
Leaders of CAISO and its EIM established a panel to update the EIM’s governance as the real-time market grows and likely adds day-ahead bidding.
Patchwork of Carbon Policies Troubles Western EIM
A carbon workshop hosted by the EIM underscored how West Coast and Intermountain states can be uneasy partners in CAISO’s real-time market.
BPA Marches Toward EIM Membership
The Bonneville Power Administration (BPA) took another step toward membership in the Western EIM when it kicked off a monthlong public comment process.

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