The playbook — lithium · October 13, 2026
Grounded books Saskatchewan's first lithium reserves on a thin PFS
A pre-feasibility study puts hard numbers on the Kindersley brine project — and the numbers are slim. The market bid the stock up anyway.
Grounded Lithium Corp. put a price tag on its Kindersley project in Saskatchewan this week, releasing a pre-feasibility study — the engineering homework that turns a geological idea into a buildable plan — and booking what it calls the province’s first lithium mineral reserves. The project pumps lithium-rich saltwater (brine) from a deep rock layer called the Duperow, using a 45-well field, and strips the lithium out at surface. The study pegs the build cost at US$434 million and a plant that would make about 3,200 tonnes a year of lithium carbonate equivalent — the standard yardstick for battery-grade lithium.
Here is the catch: that 3,200-tonne figure is down from roughly 10,000 tonnes in the company’s 2023 economic sketch, a cut of about 68% the company frames as “rigorous technical de-risking.” The brine itself is weak tea — 70 to 81 milligrams of lithium per litre, thinning to an average near 73.8 mg/L over the mine’s life as spent water gets pumped back down and dilutes the reservoir. The study spits out an after-tax return of 10.8% and a net present value of C$125 million on that C$603 million Canadian-dollar build — margins thin enough that small changes in the lithium price swing the whole thing. The work was authored by independent engineering firm Stantec, with Doug Ashton of Sproule as the qualified person signing off. Funding is the other wall: the company has no disclosed path to financing the C$603 million build beyond Denison Mines’ earn-in of up to 75% through C$15.15 million in cash and spending. Even so, the stock climbed 14.3% over three months while the lithium ETF fell 3.6% and the base-metals peer index rose just 5.9% — company-specific buying, not a sector tide.
Watch for the full NI 43-101 Technical Report, due within 45 days of the October 13 release, which will carry the detailed assumptions the press release left out. Then the honest caveats: the reserves cover only 36 of roughly 277 land sections — about 13% of the package — and the rest stays Inferred, the lowest-confidence resource tier, until more drilling upgrades it. The cost estimate is Class 4, carrying error bars of minus 15-to-30% and plus 20-to-50% on a US$434 million number. And the lithium-extraction technology (DLE) is picked but not yet piloted in the field. The de-risking story, for now, runs ahead of the economics.