Lac Windfall Mine Project

Osisko Mining Inc. is proposing the construction, operation and decommissioning of a underground gold mine located on the Eeyou Istchee-James Bay Territory, about 75 km southeast of the Cree village of Waswanipi and 115 km east of Lebel-sur-Quévillon, Quebec. The Lac Windfall Mine Project would have an ore production capacity of approximately 1,900 tonnes per day over a period of up to 10 years. Additional project components would include an ore processing plant, a tailings pond, ore, waste rock and overburden storage areas, two operating ramps and the widening of a bridge.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

Latest update

September 29, 2017 - The Canadian Environmental Assessment Agency issued the final Environmental Impact Statement Guidelines to the proponent on September 27, 2017 for the preparation of an Environmental Impact Statement.


Key documents

Key documents
Document Number Document Title File Date
10 Final Environmental Impact Statement Guidelines PDF (947 KB) September 27, 2017
6 Notice of Commencement of an Environmental Assessment - July 31, 2017
5 Notice of Environmental Assessment Determination - July 31, 2017
3 Summary of a Project Description of a Designated Project PDF (2.2 MB) June 5, 2017

List all records


Lac Windfall Mine Project
Impact Assessment Agency of Canada
901-1550 d'Estimauville Avenue
Québec, Quebec G1J 0C1
Telephone: 418-649-6444
Fax: 418-649-6443

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