Foremost Clean Energy has reported assay results from its 2026 drilling program at the Hatchet Lake South uranium project in northern Saskatchewan. Hole TF-26-30 returned 1.3% U₃O₈ over 1.0 metre, from 139.9 to 140.9 metres depth. Within that metre sits a sub-interval grading 4.5% U₃O₈ over just 0.25 metres, nested inside a broader 4.0-metre section averaging 0.36%.
The program comprised 19 diamond drill holes totalling 3,848 metres. Five drill sections, spaced roughly 50 metres apart, were tested along 200 metres of strike length of the Tuning Fork Uranium Zone, known as the TFUZ. Eight holes intersected uranium mineralization on four of those sections. Uranium therefore appears at multiple points along the trend rather than in a single isolated hole.
To identify mineralized holes, Foremost applied a minimum cut-off of 0.05% U₃O₈. Two holes are reported at a lower cut-off of 0.01%, as noted in the results table. The company also distinguishes between laboratory assays and radiometric equivalent grades, which are estimates derived from radioactivity measurements taken every 0.10 metres. The richest sub-interval is a laboratory result.
The comments come from Cameron MacKay, Vice President of Exploration. According to MacKay, TF-26-30 shows that the Tuning Fork system can concentrate high-grade uranium, and this improves the odds of discovering a significant deposit. The mineralized area remains open to the north and south. The targets considered most prospective lie to the south and have not yet been drilled.
The project sits in the Athabasca Basin, one of the richest uranium provinces on the planet. Foremost works in partnership with Denison Mines, from which it holds an option on ten exploration properties. The Tuning Fork first emerged in 2025, when hole TF-25-16 discovered a new mineralized area, returning 0.10% eU₃O₈ over 6.5 metres within a 15-metre-wide alteration zone. That result led the company to expand the program from eight to ten holes.
The 1.3% grade lies at a depth of about 140 metres. A shallow deposit is cheaper to develop than a deep one, and for a nuclear industry seeking fuel in stable jurisdictions such as Canada, that matters. New North American uranium means more supply away from areas of geopolitical tension, to the benefit of those operating or building reactors.
The next step is a new drilling campaign at the Tuning Fork, with no date yet set. If the southern holes confirm the TF-26-30 grades along an extended structure, Hatchet Lake South could move from an exploration zone to a candidate for an initial resource estimate.
