Troilus Mining Project

Troilus Gold Corp. is proposing the construction and operation of a new open-pit gold and copper mine located approximately 70 kilometres northwest of the Cree community of Mistissini and approximately 170 kilometres north of Chibougamau, Quebec. As proposed, the Troilus Mining Project would include a new mill complex and new waste rock and overburden piles. The project would also include the mining of two former open pits and the reuse and expansion of the existing waste rock and overburden piles. The project would have a maximum ore production capacity of 40,000 tons per day and a 15-year life span.


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

January 30, 2023 — The Impact Assessment Agency of Canada issued its impact assessment decision with reasons and decided that an assessment of the project is required.

January 20, 2023 — The Impact Assessment Agency of Canada (the Agency) has accepted the proponent’s Detailed Project Description and the response to the Summary of Issues (in French only), submitted to the Agency on December 31, 2022. A summary of the Detailed Project Description is available. The Agency has also resumed the timeline for the impact assessment.


Key documents

Key documents
Document Number Document Title File Date
30 Notice of Impact Assessment Decision with Reasons - January 30, 2023
28 Notice of Time Limit Resuming - January 20, 2023
26 Summary of the Detailed Project Description PDF (1.1 MB) January 20, 2023
27 Réponse au sommaire des questions (French Only) PDF (3.7 MB) December 31, 2022
25 Description détaillée de projet (French Only) PDF (51.4 MB) December 31, 2022
22 Notice of Time Limit Suspension with Reasons - July 25, 2022
17 Summary of Issues PDF (185 KB) July 4, 2022
8 Guiding Questions in Planning Phase PDF (184 KB) June 8, 2022
7 Powerpoint Presentation - June 2022 Virtual Information Sessions PDF (1.4 MB) June 8, 2022
6 Agreement concerning the Troilus external federal assessment process under the James Bay and Northern Quebec Agreement and the Impact Assessment Act PDF (4.3 MB) June 3, 2022
3 Initial Project Description PDF (41.1 MB) April 29, 2022
2 Summary of the Initial Project Description (Updated June 13, 2022) PDF (701 KB) April 29, 2022


Troilus Mine Project
Impact Assessment Agency of Canada
901-1550, Estimauville Avenue
Québec, Quebec G1J 0C1
Telephone: 418-649-6444

  • Location

    • Municipality of Baie-James (Quebec)
  • Nature of Activity

    • Mines and Minerals
  • Assessment Status

    In progress
  • Start Date

  • Proponent

    Troilus Gold Corp.
  • Authorities

    • Impact Assessment Agency of Canada
  • Assessment Type

    Planning Phase for Impact Assessment
  • Reference Number

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