ESIA

Environmental and Social Impact Assessment (“ESIA”)

In June 2025, Troilus submitted its Environmental and Social Impact Assessment (ESIA) to the Impact Assessment Agency of Canada (IAAC) and Québec’s Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP).

The ESIA is the result of over five years of detailed baseline studies, rigorous technical evaluations, and meaningful engagement with Indigenous and local communities, including the Cree Nation of Mistissini, Oujé-Bougoumou Cree Nation, the Cree Nation Government and the communities of Chibougamau and Chapais.

Key highlights of the ESIA include:

• Extensive community consultation: Input from the Cree Nation of Mistissini, Oujé-Bougoumou Cree Nation, the Cree Nation Government and the communities of Chibougamau and Chapais, helped shape project design and mitigation strategies.

• Historical familiarity with the site: As a past-producing mine (1996–2010), Troilus benefits from a strong understanding of local mining impacts and robust legacy data.
• Positive environmental findings: Independent studies conducted by Coalia, the National Research Council of Canada, Lamont, and the Minesite Drainage Assessment Group (MDAG) confirmed the waste rock is non-acid-generating, reducing long-term environmental risks and water treatment requirements.

The ESIA was developed in collaboration with BluMetric Environmental, and Stantec, two leading environmental and engineering firms Under a rolling submission model, adopted in coordination with the IAAC and Cree Nation Government, sections of the ESIA began to be submitted in early 2025 in advance of the final report, allowing regulators to begin their assessment early and provide feedback throughout the drafting process. This is expected to streamline the overall permitting timeline.

The ESIA submission initiates a formal review at both the provincial and federal levels. In Québec, the review will be led by COMEX, the environmental and social review committee established under the James Bay and Northern Québec Agreement (JBNQA). At the federal level, the Impact Assessment Agency of Canada (IAAC) will oversee a parallel process, supported by technical review, public participation, and Indigenous consultation opportunities. Final permitting decisions are expected by the end of 2026.