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Côté Gold Project, Ontario


Gogama, Ontario, Canada


64.75% IAMGOLD

Project Status

Prefeasibility Technical Report complete; Feasibility Study on-going


IAMGOLD is assessing the potential to construct and operate a new open pit gold mine on the Project property. Open pit mining operations are estimated to have a throughput rate of approximately 30,000 tonnes per day. The preliminary site layout proposes to install the necessary mine-related facilities in close proximity to the open pit.

The major Project components are expected to include:

  • an open pit;
  • an ore processing plant;
  • a maintenance garage, fuel and lube facility, warehouse and administration complex;
  • a construction and operations accommodations complex;
  • an explosives manufacturing and storage facility (emulsion plant);
  • various stockpiles (low-grade ore, overburden and mine rock (MRA));
  • aggregate extraction with crushing and screening plants;
  • a tailings management facility (TMF);
  • on-site access roads and pipelines, power infrastructure and fuel storage facilities;
  • potable and process water treatment facilities;
  • domestic and industrial solid waste handling facilities (landfill);
  • water management facilities and drainage works, including watercourse realignments; and
  • a transmission line and related infrastructure.


The Côté Gold Project is located in the Chester and Neville Townships, District of Sudbury, in northeastern Ontario. It is approximately 20 km southwest of Gogama, 130 km southwest of Timmins, and 200 km northwest of Sudbury, roughly 5 km west of Highway 144.

The Project area is characterized by gentle hills, forests, lakes and rivers. The Project area is located on two subwatersheds, the Mollie River system and the Mesomikenda River system. Additionally, the continental watershed divide is located south of the Project property, with the nearest boundary located southwest and more than 3.5 km from the proposed open pit location. Land use in the area consists of recreational activities by locals and tourists, including fishing, camping and hunting. It is also extensively used for sustainable harvesting of timber.


IAMGOLD acquired Trelawney Mining and Exploration Inc. in 2012. Trelawney had carried out exploration activities at the Project site since 2009.

Exploration activities have been ongoing in the area since the early 1900s by various companies and government agencies. More concentrated mineral exploration efforts were conducted in the early 1940s and from the early 1970s to about 1990.

Since its discovery in 2010, extensive diamond drilling activities have been undertaken to delineate the Côté Gold deposit.


The deposit is underlain by rocks of the Swayze greenstone belt representing the southwestern extension of the Abitibi greenstone belt of the Superior Province. The Swayze belt contains a diversity of extrusive and intrusive igneous rock types ranging from ultramafic through felsic compositions, as well as, both chemical and clastic sedimentary rocks. The Swayze greenstone belt underwent a complex and protracted structural history of polyphase folding, development of multiple foliations, ductile high-strain zones, and late brittle faulting.

Chester Township overlies a narrow greenstone belt assemblage which separates the Kenogamissi granitoid complex to the south. A portion of the northern edge of the Ramsey-Algoma granitoid complex is called the Chester Granitoid Complex (CGC). The Côté Gold deposit is underlain by calc-alkalic pyroclastic metavolcanics of felsic to intermediate composition (Chester Group), felsic to intermediate granitoid intrusive rocks, namely tonalite, trondhjemite, granodiorite, and diorite of the CGC and related migmatites. The granitoid rocks are very heterogeneous reflecting a number of primary igneous intrusive phases, migmatization and assimilation of older country rocks and local rafts and screens of the intruded supracrustal lithologies.


The Côté Gold Project deposit consists of low to moderate grade gold +/- copper mineralization which is associated with brecciated intermediate to felsic, and locally mafic intrusive rocks. The nature of the alteration and mineralization suggests a porphyry-style deposit. Regionally, two different types of gold mineralization are recognized. The historically important mineralization can be termed quartz vein and fracture associated, while the more recent discovery of the Côté Gold deposit represents a large gold mineralized system associated with altered and brecciated intrusive rocks interpreted as an Archean gold porphyry deposit. The extent and limits of the mineralized volume hosting the Côté Gold deposit are not yet defined but currently it has an east-northeast extent of at least 1200 m, a width of 100 m to 300 m, and a depth extent of more than 500 m. The mineralized zone remains open along strike and at depth. Drilling supports an emerging understanding of the geology where a core breccia mass within diorite is surrounded by granodiorite. A gold-mineralizing hydrothermal system has overprinted the volume of magmatically brecciated rock and developed as yet poorly defined zones of propylitic and potassic alteration.

What Is An Environmental Assessment?

An Environmental Assessment (EA) is a government driven planning and decision-making process, used to identify potential environmental effects and propose measure to mitigate adverse environmental effects. The EA predicts whether there will be significant adverse environmental effects after mitigation measures are implemented. An EA will also include a follow-up program to verify the accuracy of the EA and the effectiveness of the mitigation measures.

Federal and Provincial EAs in Ontario may be coordinated so that a single EA meets the legal requirements of both jurisdictions. The Ontario Ministry of Environment (MOE) leads this process in Ontario pursuant to the Environmental Assessment Act. Federally, this process is led by the Canadian Environmental Assessment Agency (CEAA) under the Canadian Environmental Assessment Act, 2012 (CEAA 2012).

An EA includes:

  • A description of the proposed project;
  • A description of the existing environmental conditions (baseline studies);
  • Plans to involve and seek feedback from Aboriginals, communities, neighbours, and other interested stakeholders;
  • When appropriate, an evaluation of project alternatives;
  • The identification of possible environmental effects (positive or negative),
  • Proposed measure to mitigate and manage identified environmental effects; and
  • Recommendations for follow-up monitoring.

The EA process ensures that:

  • Opportunities are provided for Aboriginal communities, municipalities, neighbours and other interested stakeholders to participate in the environmental assessment;
  • Environmental factors are included in project planning and decision-making;
  • Potential effects of the Project are identified early; and
  • Measures are identified to avoid, manage, or mitigate effects on the environment.

Federal Environmental Assessment

IAMGOLD submitted a Project Description (March 15, 2013) to Canadian Environmental Assessment Agency. CEAA used the Project Description to determine if a Federal EA is required under CEAA 2012. Based on the Project Description, comments received during the 20-day comment period, and the possibility that carrying out the Project has the potential to cause adverse environmental effects, CEAA determined that a Federal EA is required, and provided Notice of Environmental Assessment Determination (May 10, 2013).

The Project Description is used by CEAA to assist in the development of the Environmental Impact Statement Guidelines. These EIS Guideline prescribe the scope of the Federal EA for the Project. CEAA issues the draft EIS Guidelines for public comment prior to finalizing and issuing it to IAMGOLD.

CEAA issued the Draft EIS Guidelines to IAMGOLD on May 13, 2013. The draft EIS guidelines were then made available for public review and comment. CEAA then considered the comments received and finalized the EIS Guidelines. The Final EIS Guidelines were issued by CEAA to IAMGOLD on July 9, 2013.

CEAA 2012 provides CEAA 365 days from the commencement of an environmental assessment to providing the proponent with the final environmental assessment decision. These timelines apply to government activities, but not to the periods of time required for the proponent to gather information needed to complete the environmental assessment. The Minister may extend these timelines for up to three months to enable cooperation with another jurisdiction or because of circumstances that are specific to the project. The federal Cabinet can also extend timelines beyond the three months.

The next step in the federal process is for IAMGOLD to submit the EIS in accordance with the guidelines provided by CEAA. This step will be coordinated with the provincial EA process to minimize duplication, where practicable, and will rely on one body of documentation to satisfy both processes. Following review of the EIS material, CEAA will prepare a draft EA report for public comment, prior to submitting a final EA report to the federal Minister of the Environment. Following review, the Minister will issue a decision statement as to whether or not the Project will result in significant adverse environment effects, potentially with conditions. If the Minister concludes that no significant adverse environmental effects will occur as a result of the project, the project will proceed into permitting as required.

On May 9th, 2014 IAMGOLD submitted an Environmental Impact Statement to CEAA for conformity review. On May 20th, 2014, CEAA advised IAMGOLD that the information conformed to the EIS guideline requirements and that CEAA would commence a technical review of the EIS, led by CEAA with the support of federal departments. They also advised that they would initiate a public comment period, commencing June 2, 2014 through to July 2, 2014.

In keeping with the intent to coordinate the federal EIS timeline with the provincial EA process, one body of documentation was developed to satisfy both of these processes.

Following review of the EIS material, CEAA will prepare a draft EA report for additional public comment, prior to submitting a final EA report to the federal Minister of the Environment. Following the Minister’s review, a decision statement will be issued identifying whether or not the Project will result in significant adverse environment effects, and may potentially include conditions that must be met. If the Minister concludes that no significant adverse environmental effects will occur as a result of the Project, the Project will proceed into permitting as required.

Provincial Environmental Assessment

IAMGOLD entered into a Voluntary Agreement (May 3, 2013) with the Ontario Ministry of Environment (MOE) to conduct a Provincial Individual EA for the Project. The intent of volunteering is to facilitate meeting the Provincial EA requirements within one environmental assessment for subsequent Provincial permits and approvals.

The first step in the study is the preparation of a Terms of Reference (ToR). IAMGOLD voluntarily issued a Draft ToR (May 10, 2013) for a 30-day review and comment period that ended on June 9, 2013. The ToR provides the proposed framework and requirements for the preparation of the environmental assessment to meet the needs of the Ontario Environmental Assessment Act. Accompanying the ToR is a Record of Consultation. The Record of Consultation documents all engagement and consultation activities completed by IAMGOLD, up to the date of the documents submission.

Comments received on the draft ToR were incorporated, as appropriate, into the Proposed ToR and Record of Consultation. Both documents were submitted to the MOE for review and approval. A government-led consultation period on the Proposed ToR and Record of Consultation ran from July 19, to August 19, 2013. IAMGOLD received approval on the Proposed ToR from the Provincial Minister of Environment on January 14, 2014.

Receiving approval on the ToR signified the official commencement of the Environmental Assessment for the Project. IAMGOLD issued a public Notice of Commencement of Environmental Assessment in local newspapers, and the Project website between February 18 – 20, 2014.

As committed within the approved ToR, IAMGOLD agreed to prepare a draft Environmental Assessment Report to provide sufficient opportunity for Aboriginal groups, government agencies and the general public to be consulted on the Project prior to the submission of a final EA Report. Information about upcoming consultation activities can be obtained in the recently published Notice of Consultation Opportunity.

Permits And Approvals

IAMGOLD will continue to work with Federal and Provincial regulators to ensure all necessary permits and identified and acquired. Aside from the Federal and Provincial environmental assessments, some of the permits and approvals that may be required include:

  • Work in and displacement of waters frequented by fish, in navigable water ways
  • Species at Risk or Endangered Species permits;
  • Environmental compliance approvals for industrial sewage, air and noise, potable water;
  • Permit to take water;
  • Construction permits; and
  • Closure Plan

Engagement with stakeholders in the communities in which we operate is the foundation of positive community relations. Our guidance on stakeholder engagement is based on principles of trust, respect and transparency.

We have been engaging with, and will continue to engage with the communities that are potentially impacted by the Project. This includes the First Nations and Métis Communities, as well as the communities of Gogama, Sudbury, and Timmins.

Upcoming Engagement Events

IAMGOLD has a number of engagement events planned. We hope to see you at one of our events. Check back for updates on future events.

Past Engagement Events

March 2015

  • March 10, 2015: Days Inn and Conference Centre, Timmins, 5-7PM
  • March 11, 2015: Holiday Inn, Sudbury, 6-8 PM
  • Community Invitation

June 2014

  • June 23: Days Inn Conference Centre, Timmins, 3-8PM
  • June 24: The Radison Hotel, Sudbury, 3-8PM
  • June 25: Gogama Community Centre, Gogama, 3-8PM

November 2013

  • November 13th: Community Open House, Gogama, 7pm

May 2013

  • May 21: Community Open House, Sudbury
  • May 22: Community Open House, Mattagami First Nation
  • May 22: Community Open House, Gogama
  • May 23: Community Open House, Timmins
  • May 28: Community Open House, Flying Post First Nation

February 2013

  • February 13: Community Open House, Flying Post First Nation
  • February 21: Community Open House, Mattagami First Nation
  • February 26: Community Open House, Timmins
  • February 27: Community Open House, Gogama
  • February 28: Community Open House, Sudbury

January 2013

  • January 29: Business Luncheon, Timmins Chamber of Commerce
  • January 31: Business Luncheon, Sudbury Chamber of Commerce



Summer 2015 1.13 MB
Spring 2015 439 KB
Fall 2014 472 KB
Summer 2014 418 KB
Winter 2014 395 KB
Fall 2013 514 KB
Summer 2013 2.69 MB
Winter 2013 2.43 MB

Should you have any further questions about the Project, we would be happy to discuss them with you.

All questions or comments about the Project can be directed to:

IAMGOLD Corporation – Côté Gold Project
401 Bay Street, Suite 3200, P.O. Box 153
Toronto, Ontario
M5H 2Y4
T: 416-594-2881 or 705-269-0010 x 205

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