Key Takeaways
- Red Dog in Alaska is the world’s largest zinc-lead mine, contributing ~25% of Teck’s revenue.
- Teck’s zinc segment cash costs are approximately US$0.55/lb well below spot prices.
- The mine has ~10 years of reserve life remaining; Teck is evaluating underground extensions.
- At US$2,841/t zinc, Teck generates strong free cash flow with significant shareholder return potential.
Teck Resources (TSX: TECK.B) is best known today as a copper growth story the transformation following the coal sale to Glencore and the ramp-up of QB2 in Chile has dominated investor conversations for two years. But buried within Teck’s portfolio is an asset that is quietly generating extraordinary cash flow and is set to benefit significantly from tightening zinc market conditions: Red Dog, located 90 kilometres north of the Arctic Circle in northwest Alaska.
Red Dog by the Numbers
Red Dog is the world’s largest zinc-lead mine by production volume, and has held that title consistently since the mid-1990s. In 2025, Red Dog produced approximately 485,000 tonnes of zinc in concentrate and 100,000 tonnes of lead in concentrate making it a top-five global zinc producer on its own. The mine is operated by Teck under an agreement with NANA Regional Corporation, the Alaska Native corporation that owns the land.
Red Dog’s cost position is among the best in the industry. Zinc cash costs (net of lead by-product credits) are approximately US$0.42/lb well below the global industry average of approximately US$0.75/lb. This low-cost profile means the mine generates strong margins across the zinc price cycle and delivers significant operating leverage as prices rise.
Mine Life and the Aqqaluk Transition
Red Dog has been mining the main Aqqaluk orebody since the mine opened in 1989. The original Main orebody is largely depleted, and Teck has been mining Aqqaluk a deeper, lower-grade extension since the mid-2010s. Aqqaluk contains sufficient reserves to support mine life through approximately 2031 at current production rates.
The key question for long-term investors is what comes after Aqqaluk. Teck has identified the Paalaaq deposit located adjacent to the current operations as the most likely extension, but Paalaaq has lower grades than Aqqaluk and would require capital investment to develop. Management has guided that a production decision on Paalaaq is expected in 2027.
Zinc Price Sensitivity and TECK.B Valuation
At current zinc prices and with QB2 ramping up in copper, Teck’s blended commodity exposure is approximately 60% copper, 20% zinc, and 20% other (molybdenum, silver, gold by-products). As QB2 approaches full capacity in 2027, copper’s share will rise further but Red Dog’s contribution remains material.
BMO Capital Markets estimates that a sustained 10% increase in zinc prices adds approximately C$0.15 to Teck’s annual EPS and C$1.20–1.50 to its target price. With zinc deficits widening and mine supply growth limited, the zinc sensitivity in TECK.B is increasingly a source of upside optionality for investors who own the stock primarily for its copper exposure.