Entergy Arkansas, LLC v. FERC, No. 20-1262 (D.C. Cir. 2022)
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The Federal Energy Regulatory Commission (“FERC” or “Commission”) required Midcontinent Independent System Operator, Inc.’s (“MISO”) to institute reforms to its interregional planning process and directed MISO to propose a cost allocation method for its share of certain interregional project costs. Since that time, MISO has twice submitted proposals for such cost allocation. Both times, FERC rejected the proposals, finding that they were not just and reasonable as required by the Federal Power Act (the “Act”), because they were inconsistent with the cost causation principle. After the second rejection, FERC, on its own initiative, established a cost allocation method for certain MISO-PJM projects.
Petitioners challenged FERC’s rejection of MISO’s second proposal and FERC’s corresponding implementation of a cost allocation method. The DC Circuit denied the petitions and affirmed FERC’s orders in all respects. The court explained that according to MISO’s own representations to FERC in its filings, the Second Interregional Filing was “designed to work seamlessly with the revisions proposed in the [Second Regional Filing]” and relied on definitions and provisions in the Second Regional Filing As such, it was appropriate and well within FERC’s discretion to reject MISO’s Second Interregional Filing based on its rejection of the Second Regional Filing, as it would obviously suffer from the same critical flaw.
Further, as FERC noted, it made clear that its Third Regional Order was only addressing regional projects, not interregional ones. Thus, because MISO’s SPP Metric would identify regional benefits, disregarding such known benefits in cost allocation is inconsistent with the cost causation principle. Accordingly, FERC reasonably rejected MISO’s Second Interregional Filing.
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