NRG Power Marketing, LLC v. Maine Public Utilities Commission

558 U.S. 165 · Decided January 13, 2010 · Supreme Court of the United States

At a glance

NRG Power Marketing, LLC v. Maine Public Utilities Commission was decided on January 13, 2010 by a vote of 8–1. The Court reversed the lower court's decision and remanded the case. Justice Ruth Bader Ginsburg wrote the opinion of the Court. SCDB classifies its main issue as “Electric power regulation” in the Economic Activity area.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Library of Congress — official U.S. Reports scan

Case details

How the Justices voted

Full case caption

NRG Power Marketing, LLC, et al. v. Maine Public Utilities Commission et al.

SCDB identifiers: case 2009-019, docket 2009-019-01.

Related decisions

Other cases on “Electric power regulation”

• Entergy Corporation v. Riverkeeper, Inc.
  556 U.S. 208Decided April 1, 20095–4Antonin Scalia
• Morgan Stanley Capital Group Inc. v. Public Utility District No. 1 of Snohomish County
  554 U.S. 527Decided June 26, 20085–2Antonin Scalia
• Federal Energy Regulatory Commission v. Electric Power Supply Association
  577 U.S. 260Decided January 25, 20166–2Elena Kagan
• West Virginia v. Environmental Protection Agency
  142 S. Ct. 2587Decided June 30, 20226–3John G. Roberts Jr.
• Arcadia v. Ohio Power Company
  498 U.S. 73Decided November 27, 19908–0Antonin Scalia
• American Paper Institute, Inc. v. American Electric Power Service Corp.
  461 U.S. 402Decided May 16, 19838–0Thurgood Marshall

See all

Cases on the same legal provision: Federal Power Act

• Hughes v. PPL Energyplus
  578 U.S. 150Decided April 19, 20168–0Ruth Bader Ginsburg
• Entergy Louisiana, Inc. v. Louisiana Public Service Commission
  539 U.S. 39Decided June 2, 20039–0Clarence Thomas
• New York v. Federal Energy Regulatory Commission
  535 U.S. 1Decided March 4, 20026–3John Paul Stevens
• California v. Federal Energy Regulatory Commission
  495 U.S. 490Decided May 21, 19909–0Sandra Day O'Connor
• Mississippi Power & Light Co. v. Mississippi ex Rel. Moore
  487 U.S. 354Decided June 24, 19886–3John Paul Stevens
• Nantahala Power & Light Co. v. Thornburg
  476 U.S. 953Decided June 16, 19867–0Sandra Day O'Connor

Same Term, same area (Economic Activity)

• Hemi Group, LLC and Kai Gachupin v. City of New York
  559 U.S. 1Decided January 25, 20105–3John G. Roberts Jr.
• Mac's Shell Service, Inc. v. Shell Oil Products Co. LLC
  559 U.S. 175Decided March 2, 20109–0Samuel A. Alito Jr.
• Reed Elsevier, Inc. v. Irvin Muchnick
  559 U.S. 154Decided March 2, 20108–0Clarence Thomas
• United Student Aid Funds, Inc. v. Francisco J. Espinosa
  559 U.S. 260Decided March 23, 20109–0Clarence Thomas
• Jerry N. Jones v. Harris Associates L. P.
  559 U.S. 335Decided March 30, 20109–0Samuel A. Alito Jr.
• Graham County Soil and Water Conservation District v. United States ex Rel. Karen T. Wilson
  559 U.S. 280Decided March 30, 20107–2John Paul Stevens

See all

Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error