CAISO/WEIM

The California Independent System Operator serves about 80% of California's electricity demand, including the service areas of the state's three investor-owned utilities. It also operates the Western Energy Imbalance Market, an interstate real-time market covering territory that accounts for 80% of the load in the Western Interconnection.
Western Power Pool
FERC Allows Berkshire Utilities to Earn Market-based Rates in WRAP
FERC approved tariff revisions by Berkshire Hathaway Energy subsidiaries PacifiCorp, Nevada Power and Sierra Pacific Power that will enable the utilities to earn market-based rates when participating in the WRAP.
WECC
WECC Flags Hydro in BC, SW Heat as Potential Summer Concerns
Extreme heat in the Desert Southwest and low hydro in the Northwest could pose reliability problems for the Western Interconnection this summer, although the region doesn’t face an alarming risk for grid emergencies, WECC officials said.
West-Wide Governance Pathways Initiative
Pathways Backers Advance WEIM/EDAM Governance Proposal
Backers of the West-Wide Governance Pathways Initiative will move quickly on a proposal to alter the governance of CAISO’s Western EIM and EDAM after voting to approve the plan.
Business Wire
NV Energy Confirms Intent to Join CAISO’s EDAM

NV Energy intends to join CAISO’s Extended Day-Ahead Market, an official with the utility said, notching a major win for the ISO in its competition with SPP’s Markets+ day-ahead offering in the West.

NOAA
Calif. Officials ‘Cautiously Optimistic’ on Summer Reliability

State energy officials are “cautiously optimistic” about maintaining grid reliability during the upcoming summer, with California poised to benefit from above-normal snowpack and precipitation coupled with the probability of mild conditions in its coastal regions.

Terra-Gen
CAISO, WEIM Boards Approve Proposal to Raise Offer Cap
CAISO’s Board of Governors and WEIM Governing Body unanimously voted to approve an expedited proposal to increase the ISO’s soft offer cap from $1,000/MWh to $2,000.
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.
RWE
CAISO Moves for Expedited Change to Soft Offer Cap
CAISO is proposing to raise the soft offer cap in its market from $1,000/MWh to $2,000 to accommodate the bidding needs of battery storage and hydro resources in time for operations this summer.
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.

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