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December 17, 2025

SPP Western Energy Imbalance Service (WEIS)

SPP Launches Western Market Groups
SPP‘s Western Energy Imbalance Service executive committee stood up the working group responsible for developing and maintaining the market’s protocols.
Why 4 Colorado Utilities Joined CAISO EIM, not SPP WEIS
Four Colorado utilities decided to join CAISO’s Energy Imbalance Market instead of SPP’s Western Energy Imbalance Service because of the economic benefits.
SPP Board of Directors/MC Briefs: Jan. 28, 2020
SPP’s Board of Directors approved a transmission plan that will result in an estimated $545 million in projects over the next six years.
SPP MOPC Briefs: Jan. 14-15, 2020
SPP staff are expected to return to the MOPC with a proposal for a “strategic survey” following numerous occurrences of conservative operations last summer.
Changes at the Top for SPP in 2020
By midyear, SPP will be without five key figures who have helped expand the grid operator’s footprint into 17 states and implement a day-ahead market.
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.
SPP Board OKs $9.5M to Build Western EIS Market
The SPP Board of Directors accepted staff’s recommendation to budget $9.5 million to develop and stand up the Western Energy Imbalance Service market.
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.
WAPA, Basin, Tri-State Sign up with SPP EIS
WAPA, Basin Electric, and Tri-State Generation and Transmission Association announced they will join SPP’s Western Energy Imbalance Service market.
Colorado Utilities Examine Market Membership
Four Colorado utilities announced they were evaluating joining either CAISO's or SPP's energy imbalance market with the help of a consulting firm.

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