NorthWestern Energy's resource plan gets criticisms for ignoring data centers
NorthWestern Energy’s 20-year Integrated Resource Plan for Montana is facing criticism from a coalition of advocacy groups and the public, who say it underweights renewables and does not adequately account for data centers’ impact on electricity costs. The Montana Public Service Commission plans to review it in mid-August and can identify deficiencies. The groups cite a University of Michigan study and question fossil fuel and battery limits.
How this was made
The 30-second read
Why it matters
Public advocacy groups argue the plan inadequately addresses climate change and data-center-driven cost impacts, and they cite alleged forecast and disclosure gaps. PSC leadership indicates the plan will be taken up in mid-August, with the agency able to identify deficiencies.
Market read
This is a regulatory-process catalyst for NWE’s planning assumptions, with potential implications for future rate-base and resource mix if PSC identifies deficiencies.
What to watch
The article does not quantify how PSC findings would alter NWE’s capital plan or rates; the pending Black Hills merger outcome may be the larger driver of future resource adequacy than the IRP criticisms alone.
Background
Montana Public Service Commission is reviewing NorthWestern Energy’s Integrated Resource Plan covering the next 20 years.
Ticker impact
NorthWestern Energy’s 20-year Integrated Resource Plan faces criticism at Montana PSC hearings for allegedly undercounting data-center demand and climate impacts.
Near-term: modest downside bias from regulatory overhang; longer-term: risk to cost-of-service and resource planning if PSC identifies deficiencies.
The article describes a pending PSC review in mid-August and alleges deficiencies including insufficient climate treatment, capped battery storage, and failure to account for a proposed Black Hills merger.
Market effects
Highlights regulatory and political risk for US utilities’ data-center load growth assumptions and clean-energy planning constraints (battery caps, fossil fuel reliance).
Montana PSC process and potential consumer-protection legislation could affect how utilities allocate costs to data-center customers.
Limited direct global impact, but reinforces broader power-planning scrutiny tied to AI/data-center demand and decarbonization commitments.
Counterpoint
PSC cannot approve or reject the IRP, only identify deficiencies, so the immediate financial impact on NWE may be limited unless deficiencies translate into enforceable changes.
Key entities
- companyNorthWestern Energy
Montana utility whose 2026 Integrated Resource Plan is under criticism for climate and data-center demand assumptions.
- regulatorMontana Public Service Commission
State agency reviewing the IRP and expected to take it up in mid-August.
- advocacy groupEarthjustice
Filed a 134-page review raising concerns including battery storage caps and failure to account for a proposed Black Hills merger.
- companyBlack Hills Corp
Proposed merger partner mentioned as potentially affecting NWE’s load forecasts and resource adequacy.
