Your Project. Our Expertise. Common Ground.

Innovative & Safe Mining Solutions Across the Americas

Dumas Mining provides safe, innovative, and expert mining solutions across the Americas, customized to meet the unique cultures, needs, and challenges of each region.

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LATEST PROJECTS

Mine Development

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Mine Infrastructure & Construction

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Shaft Sinking

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Engineering

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Raising

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Quick Contact

+1 (416) 594 2525

Headquarters

65 Queen Street West, Suite 910, Toronto, ON

From Concept To Completion

We build underground mines throughout the Americas. Our services cover the complete project life cycle.
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SETTING THE STANDARD

OVER 30 YEARS OF UNDERGROUND MINING INNOVATION, DRIVING GROWTH THROUGH SAFETY, COLLABORATION, AND PERFORMANCE EXCELLENCE.

We partner with clients across the Americas to deliver complete underground mining solutions, from development and production to shaft sinking and engineering. Our commitment to safety, innovation, and productivity has earned us a reputation for delivering quality results, on time and on budget.

50+

PROJECTS COMPLETED

850+

SKILLED TEAM MEMBERS

7+

ACTIVE MINING OPERATIONS

Dumas has been a proud sponsor of the following companies

Who We Are

Expertise In Underground Mining

Through the Americas, our clients rely on us to bring the very best in safety, technical expertise, and innovation to their projects. We deliver world-class services through a local presence with an understanding of the unique culture and challenges of each region.

With an established record of delivering effective solutions, Dumas continuously provides innovative and superior service for clients.
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Join the team

Our core strength is our people. Unparalleled expertise and experience distinguishes our team and defines our means to achieve continued international growth.
Hiring Process
Why Join Dumas
DUMAS

Your Project.
Our Expertise.
Common Ground.

Dumas is a leading full-service underground mining contractor providing services to clients throughout the Americas. We specialize in mine construction, mine development, production mining, mine services and engineering.

Our Executive Team ensures the success, both operationally and functionally, of Dumas’ international operations and offices. They are supported by exceptional operational and business services leaders who each bring highly-regarded expertise to Dumas.

Projects

Our Work in Action

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M Zone

Minto Metals

Location

Yukon, Canada

Type

Copper (Cu), Gold (Au)

Oak Island

Tell Tale Productions

Location

Oak Island, Nova Scotia, Canada

Type

Yauliyacu

Wheaton Precious Metals

Location

Lima, Huarochirí, Peru

Type

Copper (Cu), Lead (Pb), Silver (Ag), Zinc (Zn)

Holt Mine

Agnico Eagle Mines Ltd.

Location

Black River-Matheson, Ontario, Canada

Type

Gold (Au)

Taylor Mine

Agnico Eagle Mines Ltd.

Location

Abitibi Greenstone Belt, Ontario, Canada

Type

Gold (Au)

Totten

Vale Canada Limited, Vale S.A.

Location

Sudbury, Ontario, Canada

Type

Nickel (Ni), Copper (Cu), Cobalt (Co), Platinum (Pt), Palladium (Pd), Gold (Au)

"Dumas is an innovative shaft construction company, they have many years of shaft construction experience and with an excellent track record on construction safety and cost controls."
C.Y. Thomas Li​​
Chairman – G.L. Tiley & Associates Ltd.
"Dumas is a professional and dependable mining contractor that provides Gowest Gold with competent personnel to efficiently complete the underground development, the underground construction, and the production mucking at our Bradshaw Deposit. The Dumas team is fully committed to our operational success and have implemented a great culture focused on safe production and the attainment of production goals."
Dan Gagnon
President and CEO, Gowest Gold Ltd.
"Dumas Contracting has been an integral part of Hudbay’s mining team at our Lalor Mine. They have provided a full-service lateral and vertical development advance, construction and mechanical team that works closely with our people, embracing Hudbay’s core values and our “one team one vision” approach to work management. Lalor has transitioned from a base metal mine to a gold operation, and mining of the gold and copper-gold zones at current production rates would not have been possible without the full support of the Dumas team."
Rob Carter
Vice President, Manitoba Business Unit, Hudbay Minerals Inc.
"Dumas Contracting has been a key partner at Hudbay’s Lalor Mine, providing full-service development, construction, and mechanical support aligned with our “one team, one vision” approach. The successful transition from base metals to gold production at current rates would not have been possible without Dumas’s support."
Rob Carter
Vice President, Manitoba Business Unit, Hudbay Minerals Inc.
“Major Drilling has partnered with Dumas on multiple projects. The expertise within each company have created a synergy that compliments both groups to provide superior performance for our clients on Projects throughout North America.”
Rocky McLellan
General Manager North American Underground Operations

Visit us at the CME in Timmins!

June 10, 2025 – June 11, 2025 / Timmins, ON

Visit us at CEN-CAN in Thunder Bay, Ontario

September 11, 2024 – September 12, 2024 / Thunder Bay, ON

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Contact Us

  • 65 Queen St West, Suite 910 Toronto, Ontario M5H 2M5
  • +1 416 594 2525
  • +1 416 594 9369
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