Gahcho Kué Mine is an open-pit mine located at Kennady Lake, around 280km northeast of Yellowknife in Canada's Northwest Territories. The mine spans 1,200 hectares and mines three kimberlite pipes. More than 500 people will be required to operate the mine over its lifetime.

Gahcho Kué Mine PRODUCTION

3.3

million carats in 2020


3.2

million carats in 2021


2.8

million carats in 2022


2.8

million carats in 2023


2.3

million carats in 2024


2.2

million carats in 2025


PERFORMANCE OVERVIEW

It is critical that mines adhere to best practice standards that address business, social and environmental risks.

The following certification standards are all verified by third parties to demonstrate that Gahcho Kué complies with strict and robust requirements that assess social and environmental issues, and the implementation of human rights due diligence frameworks.

  • Best Practice Principles
  • Ensuring that diamonds from DTC have met the highest professional, ethical and technical standards.
  • Learn more

Each year, emerging or evolving risks are considered, and appropriate standards are added to the BPP requirements to address these for annual verification.

  • RESPONSIBLE JEWELLERY COUNCIL
  • Addressing issues including human rights, labour rights, environmental impact, mining operations and product disclosure
  • Learn more

ISO 14001 is the international standard that specifies the requirements for an effective environmental management system. It provides a framework that an organisation can follow and subsequently be certified against. Being certified against this standard means an organisation has effectively demonstrated that they are running their organisation in an environmentally, and economically, sustainable manner.

ISO 45001:2018 is an international standard that sets out the requirements for occupational health and safety management. It provides guidance that an organisation can follow to develop their own health and safety framework and subsequently be certified against. Being certified against this standard means an organisation has effectively demonstrated that they have created the safest working conditions possible, has identified hazards and put in place controls to manage them, and has helped reduce workplace accidents and illnesses.

Date of Last BPP Audit BPP Compliant Highest Level of Finding RJC Certificate # RJC Certificate Expiry Date
17th–20th June 2024 Yes Compliant 0000 5985

View certificate

15th October 2027
ISO 45001:2018 certificate # ISO 45001:2018 Certificate Expiry Date ISO 14001:2015 Certificate # ISO 14001:2015 Expiry Date
OHS 709349 17 October 2028 EMS 637337 19 November 2027


Social Way Implementation Overview

Social Way 3.0 was launched in January 2020. The following foundational requirements are complementary to the overall Social Performance strategy:

  • 1. Governance
  • 2. Review & Planning
  • 3A. Stakeholder Engagement
  • 3B. Incident & Grievance Management
  • 3C. Social & Human Rights Risk & Impact Analysis

Certain risk-based requirements are also considered best practice and continue to be implemented:

  • 4A. Socio-Economic Development
  • 4B. Contractor Social Management
  • 4C. Community Health and Safety
  • 4D. Emergency Preparedness & Response
  • 4E. Voluntary Principles on Security & Human Rights

Of the context-specific requirements, the following have been screened in as applicable at Gahcho Kué:

  • 4H. Cultural Heritage
  • 4I. Indigenous Peoples

At the end of 2023 Gahcho Kué assessed against all twelve applicable requirements of Social Way 3.0 and the results of the assessment were incorporated into the site’s 2024 transition plan. Social Way continues to complement the overall Social Performance Strategy for Gahcho Kué.

FOCUSING ON PEOPLE

Gahcho Kué Mine is committed to supporting local communities and in particular, Indigenous Peoples by advancing employment, local procurement, and business development in alignment with the company’s Indigenous Peoples Strategy. In 2025, more than one-third of the mine’s workforce were residents of the Northwest Territories, with approximately 20 per cent identifying as Indigenous Northerners. These outcomes reflect the mine’s focus on creating sustainable employment opportunities that contribute to improved economic well-being and long-term livelihoods in the North.

Local procurement plays a central role in this commitment. Approximately 68 per cent of Gahcho Kué Mine’s operational spending was directed to Northwest Territories companies and Indigenous-owned businesses. This strong local procurement performance supports regional economic resilience by sustaining local businesses, strengthening supply chains, and creating stable employment opportunities across northern and Indigenous communities.

Gahcho Kué Mine also supports community initiatives that reinforce cultural connection and inclusion. The mine regularly welcomes community artisans to lead cross-cultural workshops for employees and, in December 2025, hosted a Christmas craft fair featuring Indigenous artisans from nearby communities. The on-site Cultural Centre, opened in 2017, is stocked with craft supplies and tools and provides employees with a dedicated space to engage in arts and crafts and cultural activities.

SUPPORTING BUSINESSES AND COMMUNITIES

As part of the mine’s plan to create a positive and lasting legacy, the majority of Gahcho Kué Mine’s spending is directed to Northwest Territories companies, with a strong emphasis on Indigenous participation. This approach translates procurement success into tangible economic outcomes, including increased local employment, business growth, and improved livelihoods, particularly within Indigenous communities.

Contracting opportunities are available across key operational and infrastructure areas, including catering and housekeeping services, electrical services, infrastructure construction and maintenance, and protective equipment supply. A critical area of opportunity is winter road construction and maintenance, which supports the mine’s primary supply chain and plays an essential role in sustaining safe and reliable access for fuel, materials, and goods. By prioritizing local and Indigenous contractors in these areas, Gahcho Kué Mine supports capacity building, local expertise, and long-term economic participation in core aspects of the mine operations.

PROTECTING THE ENVIRONMENT

Gahcho Kué Mine operates according to an environmental and social agreement with various indigenous parties.

Together, the parties are working to protect the environment over the long term and create a vision for sustainable development. The agreement focuses on social responsibilities that include protecting wildlife and the land, encouraging traditional indigenous activities, and managing the mine's impact on the environment.

MONITORING FISH HEALTH

In an annual fish-tasting event, Elders from communities in the Northwest Territories help Gahcho Kué Mine monitor the health of fish at the nearby Kirk Lake. The event supports the mine's scientific monitoring to ensure the fish remain healthy and safe to eat. In the most recent event, Elders reported the fish tasted good and were typical of trout found in shallow lakes.

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