Teck Resources said on October 24 that United Steelworkers Local 7619 members had begun strike action at Highland Valley Copper in British Columbia. Operations had not stopped, but were continuing at reduced capacity, according to the company. Teck said the overall production impact would depend on how long the labour action lasts.

The company said safety and environmental management remain priorities and contingency plans are in place during the disruption. Teck did not quantify the production decline, give an expected strike duration or provide a bargaining timetable. The update therefore does not establish a calculated production loss or a complete shutdown.

Teck reiterated its commitment to reaching what it described as a fair and reasonable collective agreement for employees. The previous agreement at the operation expired on September 30. Teck said on October 21 that it had received strike notice from the union; the October 24 update confirms that strike action subsequently began.

Highland Valley Copper is one of Teck’s Canadian copper operations. The company said the potential effect on production and previously issued guidance remained uncertain. The actual impact will depend on how long operations remain at reduced capacity and whether the parties make progress in bargaining. Teck issued no revised production guidance in this update.

Teck’s 2025 annual report provides the operating scale behind the uncertainty. Highland Valley produced 127,100 tonnes of copper in 2025, compared with 102,400 tonnes in 2024; the company attributed the increase primarily to higher grades and mill throughput as mining shifted toward higher-grade Lornex ore. The report’s 2026 guidance range was 115,000–135,000 tonnes, which Teck described as previously disclosed. Those figures are historical output and company guidance, not a measure of what the strike has removed. Teck’s October 24 update did not publish an estimate of lost tonnage or revise that range, and the annual report predates the labour action.

The same annual report describes the sanctioned Highland Valley Copper Mine Life Extension project as extending operations from 2028 through 2046, with average production of 132,000 tonnes per year over the extended mine life. Teck said the project had entered execution after provincial environmental approval and board sanction in 2025. This long-run project context does not settle the near-term consequences of the labour disruption: the mine-life plan is a company forecast conditional on project execution, while the October 24 strike update describes current reduced-capacity operations and gives no duration. The distinction matters because a long-lived reserve and expansion project cannot be used to infer immediate output or the parties’ bargaining position.

Teck’s July 2025 sanction announcement said the mine-life extension project was expected to sustain about 1,500 direct jobs and roughly C$500 million in annual GDP from the operation. These are the company’s estimates for the long-term project, not a calculation of employment or regional output at risk from the strike. The same announcement said the extension was expected to move the operation’s end date from 2028 to 2046. Reading those plans alongside the labour update gives scale to the operation’s long-term role while keeping the immediate event bounded: the strike notice and commencement releases state reduced-capacity operations, but do not disclose a duration, lost production, or the number of workers participating.