Energy Reserves Group, Inc. v. Kansas Power & Light Co.

Decided January 24, 1983. Harry Andrew Blackmun delivered the opinion of the Court.

Docket 81-1370 · 459 U.S. 400 (1983) · Cited 1,010 times

We don’t yet publish a summary of this opinion — read the official text below for the Court’s holding and reasoning.

How the Justices voted

Decided 9–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• United States Trust Co. of NY v. New Jersey · 431 U.S. 1 (1977)
• Allied Structural Steel Co. v. Spannaus · 438 U.S. 234 (1978)
• Home Building & Loan Assn. v. Blaisdell · 290 U.S. 398 (1934)
• Veix v. Sixth Ward Building & Loan Assn. of Newark · 310 U.S. 32 (1940)
• City of El Paso v. Simmons · 379 U.S. 497 (1965)
• Cities Service Gas Co. v. Peerless Oil & Gas Co. · 340 U.S. 179 (1950)
• International Ass'n of MacHinists v. Street · 367 U.S. 740 (1961)
• Phillips Petroleum Co. v. Wisconsin · 347 U.S. 672 (1954)
• Ohio Oil Company v. Indiana · 177 U.S. 190 (1900)
• W. B. Worthen Co. v. Kavanaugh · 295 U.S. 56 (1935)
• Murray v. Charleston · 96 U.S. 432 (1878)
• Pennsylvania Gas Co. v. Public Service Commission · 252 U.S. 23 (1920)
• Phillips Petroleum Co. v. Oklahoma · 340 U.S. 190 (1950)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Sveen v. Melin · 584 U.S. 811 (2018)
• Keystone Bituminous Coal Assn. v. DeBenedictis · 480 U.S. 470 (1987)
• Exxon Corp. v. Eagerton · 462 U.S. 176 (1983)
• National Railroad Passenger Corp. v. Atchison, Topeka & Santa Fe Railway Co. · 470 U.S. 451 (1985)
• United States v. Winstar Corp. · 518 U.S. 839 (1996)
• Pension Benefit Guaranty Corporation v. RA Gray & Co. · 467 U.S. 717 (1984)
• United States v. Locke · 471 U.S. 84 (1985)
• General Motors Corp. v. Romein · 503 U.S. 181 (1992)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

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Harry Andrew Blackmun’s profile · All Supreme Court opinions · The Supreme Court

Source: the U.S. Reports via govinfo.gov; authoring Justice and vote lineup from the Supreme Court Database (Washington University). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).