Connell Construction Co., Inc. v. Plumbers & Steamfitters Local Union No. 100

421 U.S. 616 · Decided June 2, 1975 · Supreme Court of the United States

At a glance

Connell Construction Co., Inc. v. Plumbers & Steamfitters Local Union No. 100 was decided on June 2, 1975 by a vote of 5–4. The Court affirmed the lower court's decision in part, reversed or vacated it in part, and remanded the case. Justice Lewis F. Powell Jr. wrote the opinion of the Court. SCDB classifies its main issue as “Union antitrust” in the Unions 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

Connell Construction Co., Inc. v. Plumbers & Steamfitters Local Union No. 100, United Association of Journeymen & Apprentices of the Plumbing & Pipefitting Industry of the United States and Canada, AFL-CIO

SCDB identifiers: case 1974-109, docket 1974-109-01.

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Cases on the same legal provision: National Labor Relations Act

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Same Term, same area (Unions)

• Linden Lumber Division v. National Labor Relations Board
  419 U.S. 301Decided December 23, 19745–4William O. Douglas
• International Telephone & Telegraph Corp. v. Local 134
  419 U.S. 428Decided January 14, 19759–0William H. Rehnquist
• Emporium Capwell Co. v. Western Addition Community Organization
  420 U.S. 50Decided February 18, 19758–1Thurgood Marshall
• National Labor Relations Board v. J. Weingarten, Inc.
  420 U.S. 251Decided February 19, 19756–3William J. Brennan Jr.
• International Ladies' Garment Workers' Union v. Quality Manufacturing Co.
  420 U.S. 276Decided February 19, 19756–3William J. Brennan Jr.

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