Windfall Underground Mine
Sector: Hydro • Location: Quebec, Canada
Source: The Northern Miner
Gold Fields is preparing to start production at its Windfall underground gold mine in Quebec, acquired through a C$2.2-billion acquisition of Osisko Mining. The project aims to begin production by late 2026 or early 2027 after permitting and approximately 18 months of construction. Windfall is located in the Urban-Barry Greenstone belt, about 700 km north of Montreal in the Eeyou Istchee James Bay
- Status
- Prospective
- Sector
- Hydro, Power Generation (CCGT)
- Location
- Quebec, Canada
- Updated
- 22 Jul 2026
- Source
- The Northern Miner
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Project Information
Participants
| Not available for this record. |
Status
Original status | planned |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | Gold Fields is preparing to start production at its Windfall underground gold mine in Quebec, acquired through a C$2.2-billion acquisition of Osisko Mining. The project aims to begin production by late 2026 or early 2027 after permitting and approximately 18 months of construction. Windfall is located in the Urban-Barry Greenstone belt, about 700 km north of Montreal in the Eeyou Istchee James Bay region. The mine is expected to produce 3.2 million ounces of gold over a 10-year life with an average annual output of 306,000 ounces. Initial capital costs are estimated at C$788.6 million with sustaining capital of C$587.6 million. The project is positioned as a tier one asset with a focus on high-quality jurisdictions and environmental sustainability, including hydro power supply. |
Original sector | Mining |
Budget |
Location
Country | Canada |
State | Quebec |
Source
Source | The Northern Miner |
URL |
More Details
Record type | Project |
Sector | Hydro, Power Generation (CCGT) |
Article published date | 2025-09-21 |
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