December 20, 1970 - Occupational Safety and Health Act, lobbied for by USWA, becomes law.
January 1, 1971 - United Stone and Allied Products Workers of America merges with USWA.
September 17, 1972 - District 50, Allied and Technical Workers, merges with USWA.
Labor Day, 1974 - USWA-promoted Employee Retiree Income Security Act (ERISA) becomes law.
February 8, 1977 - Lloyd McBride elected USWA President.