AG Nessel's Michigan Court of Appeals Brief Names Docket Numbers, Argues DTE's Own Filings Admit a Ratepayer Cost Increase

Attorney General Dana Nessel filed her opening appellate brief on August 6, 2026 in the Michigan Court of Appeals, and the brief itself — not press characterization of it — resolves several questions this appeal previously left open. Correction to prior framing: the widely-repeated “$474 million” figure is NOT the dollar amount the appeal brief argues over. That figure belongs to a separate, later DTE general rate case (filed April 2026, seeking a 9.7% residential increase, 2026-04-24–nessel-calls-dte-rate-hike-pause-offer-ransom-note) that DTE tied to the Saline project coming online on schedule. A full-text search of the 145,412-character brief for “$474,” “474.3,” and “474 million” returns zero matches. The dollar figure actually in dispute in the appeal is DTE’s own $300 million substation cost estimate (of which the data center’s landlord contributes only $40 million) and a $200 million transmission-upgrade estimate the AG’s brief argues is incomplete — omitting an unknown further category of generation-development costs the brief says “could be well in the hundreds of millions, if not billions of dollars.” The “nearly half a billion dollars in up-front costs” figure attributed to Earthjustice attorney Jacob Elkin in press coverage is a rhetorical characterization of exposure, not a brief-stated total; it was not independently verified against the Earthjustice/MEC/Sierra Club/NRDC brief text, which was not locatable as a standalone document during this pass.

Docket numbers, now confirmed from the brief’s own caption (previously unassigned as of the April 17 Claim of Appeal, which showed “Court of Appeals No.____” blank): this is not one appeal but three consolidated dockets before the same panel, all captioned “In the Matter of the Application of DTE Electric Company for Approval of Special Contracts, MPSC Case No. U-21990”:

• Michigan Environmental Council, NRDC, and Sierra Club — Court of Appeals No. 380334
• Attorney General Dana Nessel — Court of Appeals Nos. 380362, 380364, and 380878 (three numbers, one per appealable MPSC order — the December 18, 2025 approval, the March 27, 2026 denial of rehearing, and the March 27, 2026 denial of the motion to reopen)
• Great Lakes Renewable Energy Association — Court of Appeals No. 380462

The brief requests oral argument; no argument date has been set as of this filing. No ruling has issued. The MPSC and DTE are listed as appellees; their response brief was not yet located as of this research pass.

The rate mechanism, precisely: DTE’s power supply to the data center is not a tariff or a rider — it is a bespoke special contract under MCL 460.6a(3), approved by the MPSC via ex parte review (a process available only when the Commission finds the deal “will not result in an increase in the cost of service to its customers”). The contract layers terms on top of DTE’s existing D11 large-load tariff: a 19-year minimum duration (vs. 5 years standard), an 80% minimum billing demand (vs. 50-60% standard, meaning the data center pays for at least 80% of contracted capacity regardless of actual use), and a termination payment of up to 10 years’ worth of minimum billing demand if the facility exits early. A companion agreement requires the data center’s operator, Green Chile Ventures LLC (an Oracle subsidiary and the named counterparty throughout the docket), to fund 1,383 MW of battery storage over 15 years, which DTE will own and operate, with Green Chile receiving wholesale market revenues from it.

Who bears stranded-cost risk, per the order’s own text: the MPSC’s December 18, 2025 order makes DTE — not ratepayers — the nominal credit-backstop, requiring DTE to “be responsible for any costs to serve” the data center that it cannot recover from Green Chile Ventures. The AG’s brief directly attacks this framing on two grounds: (1) DTE modified the Commission’s proposed “essential cost coverage” condition language between the original order and its acceptance letter, in a way the brief argues “obscures, if not removes” the language preventing cost recovery from other customers (Argument III); and (2) even accepting DTE as credit-backstop, the Commission never evaluated the risk to DTE itself or to DTE’s other ratepayers if DTE’s own credit is strained by the exposure (Argument III.C.2) — meaning the “DTE absorbs the risk” framing was asserted by the Commission, not tested. The brief’s core statutory argument (Argument I) is narrower and more concrete than the “half a billion” framing: DTE’s own filings admit a projected cost increase specifically for Retail Open Access (ROA) customers, which the AG argues disqualifies the deal from ex parte review under MCL 460.6a(3) on its face, regardless of how any other argument is decided.

Contrast with the Louisiana structure (2026-08-12–louisiana-psc-meta-hyperion-hides-electricity-demand-data, LPSC docket U-37882): Michigan’s structure names its counterparty in the public record — Green Chile Ventures LLC is identified throughout the MPSC order and the AG’s brief as the Oracle subsidiary directly contracting with DTE — where Louisiana’s Entergy/Hyperion arrangement runs through a separate financing SPV, borrower, and tenant that Meta’s own SEC filings do not name. Michigan is not opaque in the same way; the redaction fight here is over contract terms (the AG’s brief repeatedly cites “extensively-redacted application material”; a February 2026 Detroit News story reported the deal is covered by an NDA), not over corporate identity. The financing layer is separately documented: Related Digital (the developer) announced in April 2026 that the $16B project’s financing includes equity from Blackstone-affiliated funds and debt anchored by PIMCO-managed accounts — a distinct financing chain from the DTE power-supply contracts at issue in this appeal, and not itself under MPSC jurisdiction.