Ameren Illinois Company v. FERC, No. 20-1277 (D.C. Cir. 2023)Annotate this Case
The petitions for review sought reversal of a refund order by the Federal Energy Regulatory Commission (FERC or Commission) upon finding a discrepancy in petitioner Ameren Illinois’s self-reported operational costs. Instead of reporting construction-related materials and supplies costs on line 5 of page 227 of Form 1, Ameren Illinois reported these costs on line 8 with the result that it over-collected for transmission costs. The Commission found that this reporting error was contrary to Ameren Illinois’s filed rate, which, prior to June 1, 2020, did not allow it to recover costs recorded to line 5 of page 227.
The DC Circuit affirmed the Order, denying review and reconsideration. The court explained that the Commission’s decision that Ameren lacked the discretion to report construction-related costs on line 8 was not unreasonable, arbitrary and capricious, or otherwise contrary to law. The court reasoned that although the Commission “may not retroactively alter a filed rate to compensate for prior over- or underpayments,” Exxon Mobil Corp. v. FERC, 571 F.3d 1208, 1211 (D.C. Cir. 2009), that is not what occurred here. All the Commission has done is require Ameren Illinois to correct a reporting error that resulted in overcharging customers for expenses not allowed under Ameren Illinois’s then-registered formula rate. Its contrary arguments fail to demonstrate that the refund order was unjust or contrary to the law.