Recent deep drilling has targeted the projected down-plunge extension of the Lynx 4 zone at vertical depths of nearly 1,700 meters, returning significant results such as 81.8 g/t gold over 3.5 meters .
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.
Gold Fields anticipates achieving the first gold pour at Windfall by late Q4 2026 or early 2027 . Osisko drills more high grades across Windfall ...
As of April 2026, the has transitioned from an exploration-focused play to a high-priority development asset under the full ownership of Gold Fields , which completed a $2.1 billion acquisition of Osisko Mining in October 2024. While the project is moving toward construction, drilling continues to yield the "bonanza" grades that made the deposit famous. Latest Drilling & Exploration Highlights (Early 2026)
Final environmental approvals and a formal Board Investment Decision (FID) are expected in the second half of 2025 or early 2026. Recent deep drilling has targeted the projected down-plunge
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.
Full-scale construction of the processing plant is slated to take 18–24 months. As of April 2026, the has transitioned from
Continued expansion drilling outside of the existing Mineral Resource Estimate (MRE) blocks has confirmed the presence of new high-grade mineralization that remains open for further growth.