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Northwestern Energy presents large‑load tariff to Montana committee; advocates and environmental groups press for transparency
Summary
Northwestern Energy and the PSC staff outlined a proposed tariff to govern how large new electric customers (including data centers) would be reviewed and charged; the draft includes development deposits, minimum terms, load‑factor requirements and potential surcharges to avoid cost‑shifting. Environmental groups urged a separate rate class and greater PSC oversight.
Steve Wade, government‑affairs director for Northwestern Energy, and Charles Lane, the utility's director of regulatory affairs, told the Energy and Technology Interim Committee the company's draft large‑load tariff is a framework — not project approval — designed to preserve reliability while preventing cost shifting to existing customers. "There are no special rates for these customers," Lane said, emphasizing that qualifying customers would take service under Northwestern's existing transmission‑level customer class unless the commission found otherwise.The tariff, as described, would apply to new or expanded loads of 5 megawatts and above, require development deposits to fund study costs, set minimum contract terms (for example, a 15‑year minimum for very large customers around 50 MW), include take‑or‑pay obligations (minimum billing up to 75% for some large customers), collateral and termination fees to protect against stranded assets, and provide the commission the opportunity to review electric service agreements for very large projects. Northwestern said surcharges could be proposed if current tariff rates were insufficient to cover required infrastructure upgrades and that the process is designed to ensure full cost recovery for incremental infrastructure.Legal and community advocates at public comment raised concerns. Anne Hedges of the Montana Environmental Information Center called the draft "wholly insufficient," urged a separate rate class for large loads and warned that agreements below 50 MW currently escape PSC review and public scrutiny. "We want transparency in this process," Hedges said; she indicated MEIC will intervene at the PSC and pursue legislative remedies if needed.Members of the committee asked detailed questions about termination fees, reliability metrics and whether terms could include emergency access to on‑site backup generation. Northwestern said many such specifics would be negotiated in electric service agreements and reviewed transparently before the PSC; the company also said it is open to discussing rate‑class treatment during a future general rate case.The committee did not vote on the tariff; several members signaled they would track the PSC docket closely and expect interveners to use the commission review process to shape specific contract protections.
