Once at steady state, the mine is projected to produce 300,000 ounces of gold annually . Key Metrics & Infrastructure
The project is currently in the , with Gold Fields aiming for aggressive development timelines: Osisko drills more high grades across Windfall ...
Full-scale construction of the processing plant is slated to take 18–24 months. Once at steady state, the mine is projected
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) While the project is moving toward construction, drilling
Windfall is ranked as a top 10 gold deposit globally by head grade, with reserves averaging 8.1 g/t gold .
Final environmental approvals and a formal Board Investment Decision (FID) are expected in the second half of 2025 or early 2026.