Background
The Ohio Valley Electric Corporation (OVEC) was formed in 1952 by regional investor-owned utilities to supply electricity to a federal uranium-enrichment facility in southern Ohio. After the Department of Energy terminated its power agreement with OVEC in 2003, the sponsoring companies — Duke Energy Ohio, AES Ohio (Dayton Power and Light), and AEP Ohio (Ohio Power Company) — assumed entitlement to all of OVEC’s net energy and capacity from its eleven coal-fired generating units at Clifty Creek Station and Kyger Creek Station. When R.C. 4928.148 took effect in October 2019, it required the Public Utilities Commission of Ohio (PUCO) to establish a Legacy Generation Resource (LGR) Rider — a nonbypassable charge paid by all retail customers — to allow the companies to recover prudently incurred OVEC-related costs from January 1, 2020 through December 31, 2030, and mandated periodic prudence and reasonableness audits.
The PUCO opened an audit proceeding in 2021 covering calendar year 2020, appointing London Economics International, LLC as third-party auditor. Following an evidentiary hearing in late 2023, the commission issued an August 2024 opinion and order adopting all auditor recommendations except a proposed cap on capital expenditures, concluding that all costs and sales flowing through the three companies’ LGR Riders were prudent and reasonable and that no costs should be disallowed.
The Ohio Environmental Council (OEC) and the Ohio Manufacturers’ Association Energy Group (OMAEG) jointly sought rehearing and then filed separate appeals to the Supreme Court of Ohio. They argued the commission applied incorrect legal standards, improperly shifted the burden of proof, excluded relevant evidence, and permitted recovery of costs associated with OVEC’s must-run commitment strategy without meaningful scrutiny. The three utilities intervened as appellees.
The Court’s Holding
In a unanimous opinion authored by Justice Shanahan (joined by all six participating justices), the court affirmed the PUCO’s orders in their entirety. On the must-run commitment strategy — under which OVEC operates its plants continuously regardless of whether wholesale market prices cover marginal costs — the court held the commission committed no reversible error. Because changing OVEC’s commitment status required unanimous approval of its multi-company operating committee, the individual sponsoring companies lacked unilateral authority over the strategy; the commission reasonably concluded they could not be individually faulted for its continuation. The court further found that, to the extent the commission erred in invoking a presumption of prudence, that error was harmless given the ample record support for the underlying prudence determination.
The court rejected OMAEG’s evidentiary challenges, holding that the commission did not abuse its broad discretion in excluding portions of expert John Seryak’s testimony about prior OVEC riders and the legislation creating the LGR Riders, since R.C. 4928.148 confines the audit to the companies’ actions during the specific calendar-year audit period, not events predating the LGR mechanism. The commission’s exclusion of a PJM Independent Market Monitor report was similarly upheld because OMAEG failed to make the document part of the record, leaving the court without a basis to evaluate its relevance. On the R.C. 4903.09 question (requiring sufficient reasoning in commission orders), the court found the commission’s detailed citations to record evidence satisfied the statute. OEC’s due-process claim was dismissed for lack of jurisdiction because OEC had not raised it on rehearing as required by R.C. 4903.10.
The court declined to disturb the commission’s factual findings, reiterating that its role is not to reweigh evidence or second-guess the PUCO on questions of fact, and that a commission order will only be reversed when it is manifestly contrary to the evidence or clearly unsupported by the record.
Key Takeaways
- Audit scope under R.C. 4928.148 is strictly limited to the companies’ actions during the designated calendar-year period; evidence about prior cost-recovery mechanisms or pre-LGR legislative history falls outside that scope and may be properly excluded.
- Where a generation operating strategy (such as a must-run commitment) requires multi-party unanimous approval through a corporate governance structure, an individual utility company cannot be held imprudent for that collective decision, even if the outcome proves costly to ratepayers.
- A commission error in applying a presumption of prudence does not require reversal if the record independently supports the prudence finding — harmless-error analysis applies in PUCO proceedings.
- Parties challenging commission evidentiary rulings on appeal must fully develop the record below; proffering evidence that is never formally admitted and then failing to cite specific excluded content is fatal to such a challenge.
- R.C. 4903.10’s exhaustion requirement is jurisdictional: claims not specifically raised in an application for rehearing — including constitutional due-process arguments — cannot be pursued on appeal before the Supreme Court of Ohio.
Why It Matters
This decision provides significant guidance on the scope and conduct of the periodic LGR Rider audits that R.C. 4928.148 mandated for Ohio’s legacy coal fleet through 2030, even though the General Assembly has since repealed that statute effective August 2025. The ruling confirms that the PUCO’s prudence review is a backward-looking, calendar-year-specific exercise and that the governance structure of a multi-party generation cooperative — not individual utility decision-making — will largely insulate sponsoring companies from imprudence findings related to collective operational choices like commitment strategy.
More broadly, the opinion reinforces the high bar appellants face when challenging PUCO cost-recovery approvals: evidentiary objections require meticulous record preservation, R.C. 4903.09 is satisfied by detailed reasoning rather than exhaustive citation, and the court will not independently weigh competing expert views on operational prudence. Consumer and industrial-customer groups seeking to contest utility cost pass-throughs for legacy generation assets — including any assets governed by successor statutory frameworks — will need to build a far more complete evidentiary record at the commission level to succeed on appeal.