At the World’s Biggest Copper Mine, 95% Backed a Strike
Nine hundred fifty-five supervisors at Chile’s Escondida mine voted to strike. Thirty-eight voted to take BHP’s contract offer. Another 12 ballots were blank and two were null. At the world’s largest copper mine, the numbers left little room for interpretation.
The 94.8 percent rejection announced on September 30 by Union No. 2 of Supervisors and Staff does not mean a walkout has begun. Chilean law sends the parties into mandatory mediation first. But the vote moved a dispute over pay, shifts and job boundaries out of the negotiating room and into a formal countdown.
The 1,020-member union says BHP’s final offer provided no meaningful improvement over the current agreement. Its objections include zero adjustment to fixed and variable pay, a proposed 14-days-on, 14-days-off schedule and broader multi-skilling requirements, including training supervisors to operate trucks. BHP says its proposal contained improvements and new benefits beyond the existing contract.
The argument is about who captures copper’s windfall
Escondida is not an ordinary workplace. BHP operates the mine; Rio Tinto owns 30 percent and Japan-based JECO holds 12.5 percent. The union’s analysis of Cochilco and company data says Escondida produced 1.345 million metric tons of contained copper in 2025—about a quarter of Chile’s national output.
The union also calculates that Escondida generated $13.863 billion in profit and paid shareholders $10.619 billion in dividends across fiscal years 2024 to 2026. It puts the full cost of its proposed two-year contract at about $69.5 million, or 0.34 percent of projected EBITDA. Those are the union’s calculations from company and industry data, not figures independently audited by Pamphlets. They nevertheless explain why the bargaining unit describes the offer as a question of recognition, not simply a dispute over one bonus.
Work organization sits beside pay at the center of the conflict. A 14-by-14 roster and training supervisors to fill operating roles would give management more flexibility. The union argues that the same changes add responsibilities without a comparable material gain. In a capital-intensive mine, that is a fight over who absorbs operational pressure and who captures productivity.
Copper has made that argument unusually charged in Chile for generations. Pamphlets previously examined the struggle over national resources in its history of Salvador Allende and U.S. covert intervention. Today’s negotiation is narrower and occurs under labor law, but it turns on a related distributional question: how much of a strategic industry’s value returns to the people who keep it running?
Five days to close a wide gap
Under Article 351 of Chile’s Labor Code, either side may request mandatory mediation within four days after a strike vote. The process suspends the stoppage for five working days and can be extended by up to five more if both parties agree. BHP said it may seek that process through the Labor Inspection Office.
The talks are unfolding days after a maintenance operator died at the mine. BHP said it paused mine operations and then began a gradual restart after reviewing safety conditions. The supervisors’ union refused the company’s request to suspend bargaining, accusing BHP of using the death to delay negotiations after unions had warned about safety. BHP said its request was intended to let the company focus on supporting workers. The competing accounts should not be collapsed into one claim; they show how little trust remains.
Mediation may still produce a settlement and avert a stoppage. The vote has already drawn a clear line, however. At Escondida, supervisors are asking a mine with exceptional scale and profitability to translate that performance into pay and working conditions. The next formal conversation takes place with a labor inspector in the room.
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