PPL Montana, LLC v. Montana
565 U.S. 576 · Decided February 22, 2012 · Supreme Court of the United States
Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.
At a glance
PPL Montana, LLC v. Montana was decided on February 22, 2012 unanimously (9–0). The Court reversed the lower court's decision and remanded the case. Justice Anthony M. Kennedy wrote the opinion of the Court. SCDB classifies its main issue as “Natural resources and environmental protection” in the Economic Activity area.
Read the opinion
Case details
- Citations
- 565 U.S. 576 · 132 S. Ct. 1215 · 182 L. Ed. 2d 77 · 2012 U.S. LEXIS 1686
- Docket number
- 10-218
- Decided
- February 22, 2012
- Argued
- December 7, 2011
- Court era
- Roberts Court
- Decision type
- Opinion of the Court (orally argued)
- Disposition
- Reversed and remanded
- Outcome for petitioner
- The petitioning party received a favorable disposition
- Vote
- 9–0 (unanimous)
- Majority opinion
- Anthony M. Kennedy
- Opinion assigned by
- John G. Roberts Jr.
- How the case arrived
- Certiorari
- Issue (SCDB)
- Natural resources and environmental protection
- Issue area
- Economic Activity
- Type of law
- No legal provision
- Decision direction (SCDB)
- Conservative what this means
How the Justices voted
| Justice | Vote | Separate writing |
|---|---|---|
| Justice Antonin Scalia | Majority | |
| Justice Anthony M. Kennedy | Majority | Wrote an opinion |
| Justice Clarence Thomas | Majority | |
| Justice Ruth Bader Ginsburg | Majority | |
| Justice Stephen G. Breyer | Majority | |
| Chief Justice John G. Roberts Jr. | Majority | |
| Justice Samuel A. Alito Jr. | Majority | |
| Justice Sonia Sotomayor | Majority | |
| Justice Elena Kagan | Majority |
Full case caption
PPL Montana, LLC, Petitioner v. Montana
SCDB identifiers: case 2011-027, docket 2011-027-01.
Related decisions
Other cases on “Natural resources and environmental protection”
- Chantell Sackett v. Environmental Protection Agency
- American Electric Power Company, Inc. v. Connecticut
- Los Angeles County Flood Control District Petitioner v. Natural Resources Defense Council, Inc.
- Doug Decker v. Northwest Environmental Defense Center;
- Monsanto Company v. Geertson Seed Farms
- State of Alabama v. State of North Carolina.
Same Term, same area (Economic Activity)
- KPMG LLP v. Robert Cocchi
- Compucredit Corporation v. Wanda Greenwood
- Pacific Operators Offshore v. Luisa L. Valladolid
- Marcus D. Mims v. Arrow Financial Services, LLC
- Lawrence Golan v. Eric H. Holder, Jr.
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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