How BHP is building Saskatchewan's Jansen potash mine in two stages

The stages add similar capacity on different schedules

BHP expects Stage 1 to start production in mid-2027 and ultimately produce 4.15 million tonnes a year. Stage 2 is expected to begin producing in mid-2031 and add 4.36 million tonnes a year. BHP expects the combined operation to reach full capacity in its 2033 to 2034 financial years. Source 1

The first-stage cost estimate increased from approval

BHP cites a Stage 1 estimate of USD 5.7 billion at sanction and USD 8.4 billion after a detailed review. Its current Stage 2 estimate is USD 6.9 billion. The combined estimate for the two stages is USD 15.3 billion. Source 2 Source 1

Construction progress and operating capacity measure different things

BHP's October construction update puts the first stage at 87% and the second at 18%. These are progress estimates while the mine is under development. Annual capacity applies after commissioning and ramp-up. Source 1

The export chain includes rail and a separate terminal

BHP has agreements with CN and CPKC to carry potash to Westshore Terminals in Delta, British Columbia. An access spur at Jansen connects to both railway networks. The route to the terminal is a separate operational step from extraction and processing at the mine. Source 1

Sources

• BHP Jansen project profile, progress, investment and production
• BHP February 2026 half-year results presentation and Jansen cost review