What is an Environmental Assessment?

We are committed to protecting the natural environment surrounding our exploration properties and mine operations. As part of our Environmental Management Plan we will work to prevent or mitigate environmental impacts, meet or exceed regulatory requirements and strive to continually improve our environmental practices and performance. 

An Environmental Assessment (EA) is a planning and decision-making process designed to evaluate a project by identifying potential environmental effects and proposing measures to mitigate or manage these effects before the project proceeds.


An EA includes:

  • A description of the proposed project;
  • A description of the existing environmental conditions (baseline studies);
  • Consultation with Indigenous people, local communities, and other interested stakeholders;
  • An evaluation and selection of project alternatives;
  • The identification of potential environmental effects (positive and negative),
  • Measures to mitigate and manage identified environmental effects; and
  • Recommendations for follow-up monitoring.


The EA process ensures that:

  • Potential effects of the Project are identified early
  • Indigenous people, local, communities and other interested stakeholders are able to participate in the environmental assessment through facilitated engagement;
  • Environmental effects are considered and addressed in project planning and decision-making;
  • Measures are identified to avoid, manage, or mitigate effects on the environment.


Greenstone Gold Mines has been engaged in environmental assessment on its Hardrock Project with both the Federal and Ontario EA agencies, since April 2014. The Hardrock Project must receive approval from both the Federal and Ontario EA agencies and then complete other permitting requirements. The Provincially-regulated individual EA and the Federal EA are being coordinated so that a single EA document is prepared that meets both the Provincial and Federal processes. Consultation activities will also be coordinated as practical and comments received form part of final submissions to agencies. A coordinated Federal and Provincial EA process entails the following:


Federal Environmental Assessment


Submitted Project Description to CEAA April 23, 2014.

CEAA determined that a Federal EA was required and provided the Notice of Environmental Assessment Determination April 25, 2014.

Submitted Project Description Report Addendum July 28, 2014. 

Received Guidelines for the Preparation of an Environmental Impact Statement (EIS) August 5, 2014. 

Submitted Draft Environmental Assessment Report to CEAA February 1, 2016. 

Submitted Final Environmental Assessment Report to CEAA July 12, 2017.

CEAA advised that the EA Report conforms with EIS guideline requirements commencing a technical review of the document initiating a 30 day public comment period August 11, 2017. 

CEAA public review and acceptance of public comments up to October 6, 2017. 

CEAA Draft Environmental Assessment Report October 1, 2018.



What is an Environmental Impact Statement (EIS)?

Environmental Impact Statement, is the federal terminology for the documents that are submitted as part of the environmental assessment and contain the information about existing environmental condition, the impacts that are predicted to result from the project and the mitigation measures that are proposed to minimize those impacts.


Provincial Environmental Assessment


Letter sent to MOECC volunteering to undertake individual EA August 19, 2014.

Entered into a Voluntary Agreement with MOECC August 29, 2014.

Submitted Draft Terms of Reference to MOECC October 7, 2014.

Submitted Terms of Reference to MOECC January 2, 2015. 

Received Terms of Reference - Notice of Approval with conditions June 24, 2015. 

Submitted Terms of Reference Editorial Amendment per Notice of Approval June 24, 2015. 

Provincial Environmental Assessment officially commenced effective June 24, 2015. 

Submitted Draft Environmental Assessment Report to MOECC February 1, 2016.

Submitted Final Environmental Assessment Report to MOECC July 18, 2017. 

MOECC public review and acceptance of public comments up to October 6, 2017. 

MOECC government review report.

MOECP Environmental Assessment Report October 22, 2018.

MOECC Decision Statement issued March 26, 2019. 


What is a Terms of Reference (ToR)?

Terms of Reference, is a guide to completing the environmental assessment. It describes the type of work to be carried out as part of the EA.


Permits and Approvals

Greenstone Gold Mines will continue to work with Federal and Provincial regulators to ensure all necessary permits and requirements are identified and acquired. Some of the Federal and Provincial Permits and Approvals that may be required include:

  • Environmental Compliance Approval, Air and Noise
  • Environmental Compliance Approval, Industrial Sewage
  • Permit to Take Water
  • Environmental Effects Monitoring Program (water quality, fish and other aquatic organisms)
  • Species at Risk permit
  • Construction and building permits; and
  • Mine Closure Plan