Osisko Drills More High Grades Across Windfall ... May 2026

The feasibility study projected an All-In Sustaining Cost ( AISC ) of approximately US$758–$760 per ounce , positioning it as one of the lowest-cost mines in Canada.

Recent infill results (February 2026) continue to show high-grade continuity, with some intercepts reaching average grades of 11.3 g/t Au in the measured category. Project Status and Path to Production Osisko drills more high grades across Windfall ...

The site is now fully powered by hydroelectricity through an 85km power line operated by the Cree First Nation of Waswanipi , significantly reducing the project's carbon footprint. The feasibility study projected an All-In Sustaining Cost

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