IURC Reaffirms GenCo Approval and Amazon Special Contract Framework; NIPSCO Announces $7B, 2.6GW Gas + 400MW BESS Build for Amazon

Opening

On November 19, 2025, the Indiana Utility Regulatory Commission reaffirmed its September 24, 2025 approval of the NIPSCO GenCo framework in Cause No. 46322 and approved the structure of NIPSCO’s 15-year special contract with Amazon Web Services. The same day, NiSource and NIPSCO publicly announced the full terms of the Amazon deal: 2.6 GW of combined-cycle gas generation plus a 400 MW / 1,600 MWh battery energy storage system at the Schahfer Generating Station site, at approximately $7 billion in total capital investment, to serve Amazon’s planned multi-billion-dollar data center campuses in northern Indiana.

What Happened / Key Facts

The Amazon deal’s full structure:

• Two 1,300 MW combined-cycle gas turbine (CCGT) units to be built by GenCo at the Schahfer Generating Station site (Wheatfield, Indiana) — a former coal plant site being repurposed for dedicated hyperscaler gas generation
• 400 MW / 1,600 MWh (4-hour duration) battery energy storage system at the same site
• Total capital investment: approximately $7 billion (generation + storage + associated transmission infrastructure)
• Service commencement: January 1, 2027 (per special contract terms)
• Ramp to 2,400 MW by end of 2032
• Contract duration: 15 years

The ratepayer savings claim: NIPSCO projected approximately $1 billion in savings to existing residential and business customers over the 15-year contract term, to be returned as credits on monthly bills — approximately $7/month for an average residential customer using 672 kWh/month. NIPSCO indicated roughly 50% of the savings are guaranteed under the contract structure. The $1 billion projection is utility-produced; no independent verification of the figure has been published.

The confidential contract: The IURC filings in Cause 46322 did not name Amazon; the details matching Monday’s public announcement (capacity, capital expenditure, ratepayer savings) appeared in regulatory filings only at a level of abstraction that allowed identification by comparison. The specific per-unit payment terms between Amazon and NIPSCO under the special contract were designated confidential and are not part of the public record. Citizens Action Coalition noted the IURC “accepted Amazon’s assertion” of full cost coverage without requiring public evidentiary support confirming the payment terms cover GenCo’s all-in cost of service.

CAC cross-examination at IURC proceedings: CAC Regulatory Director Jennifer Washburn cross-examined NIPSCO President Vince Parisi at an IURC hearing on the Amazon special contract. CAC pressed on: (1) NIPSCO’s status as Indiana’s highest-cost residential utility ($77/month increase over two years); (2) the “lack of evidence in the proceeding substantiating its claims about customers benefitting from data centers”; (3) the role of Blackstone (private equity investor holding 19.9% of NIPSCO) in the GenCo capitalization structure; and (4) NIPSCO’s concurrent lockout of union employees.

Environmental scale: The 2.6 GW of gas-fired generation GenCo plans at Schahfer would produce nearly four times the greenhouse gas emissions of the Schahfer coal plant in 2023 (the final year of coal operation). The gas buildout locks the Schahfer site into fossil fuel generation through at least 2040 — reversing NIPSCO’s prior energy transition commitments at that site.

The Schahfer coal context: The Hallador Energy / Merom coal plant contract (500 MW, 12 years, at approximately $450/MWd — more than double typical PJM market rates) was separately negotiated to supply interim capacity while GenCo’s gas units are constructed. This means Amazon’s initial load is being served through a coal revival rather than new-build gas or storage.

IURC complaint volume context: By May 2026, IURC complaint volume about NIPSCO already exceeded all 2025 complaints combined, with more than half of 2026 complaints about the utility — indicating that the GenCo approval and Amazon deal announcement have not resolved public concern about NIPSCO’s rate trajectory.

Why This Event Matters

The November 19, 2025 reaffirmation and public announcement locked in the structural precedent: Indiana now has a functioning unregulated-affiliate generation vehicle serving a hyperscaler under a confidential special contract. The $7 billion capital commitment makes the GenCo model durable — construction is underway, Amazon has contracted capacity, and reversing the IURC approval would require a judicial challenge that no party had publicly announced as of May 2026.

The confidential contract structure is the mechanism that prevents independent verification of the ratepayer-protection claim. If Amazon is paying full cost of service, the GenCo model is ratepayer-protective. If Amazon is receiving a below-cost rate — even marginally — the $1 billion savings claim could mask a smaller cross-subsidy from the approximately 460,000 NIPSCO residential customers. The IURC’s acceptance of utility-asserted cost coverage without public evidentiary support is the structural flaw that CAC identified and that remains unresolved.

Broader Context

Two weeks after the Amazon announcement, NIPSCO and GenCo filed Cause 46393 (April 16, 2026) for a second data center special contract — reported to be for a Google data center in Michigan City. This replication within six months of the Amazon announcement demonstrates that the GenCo vehicle is being operationalized as a durable multi-customer platform, not a one-time exception. NiSource’s projected customer savings under both deals combined reached approximately $1.25 billion over 15 years — a revised upward figure from the $1 billion Amazon-only estimate.

Research Gaps

• Full IURC Cause 46322 November 19, 2025 order text: the specific findings on the special contract approval and cost-of-service verification standard
• Whether the IURC required any evidentiary showing that Amazon’s payment equals or exceeds GenCo’s cost of service, and what the standard of review was
• CAC post-November status: whether CAC filed a petition for reconsideration after the November 19 reaffirmation or pursued any other adversarial procedural step
• Final IURC approval of the Amazon special contract (requested by May 6, 2026): approved, denied, or modified?
• Schahfer site construction timeline: permits filed, groundbreaking date, current construction status

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