Dumas
Website verified August 2026
- Engineering & EPCM
- Mining Consultants
- Mining Contractors
- Argentina
- Canada
- Guatemala
- Latin America
- Mexico
- North America
- Peru
- United States
Key takeaways
- Category: Engineering & EPCM, Mining Consultants, Mining Contractors
- Based in: Toronto (headquarters), Timmins, Ontario and 5 more locations
- Serves: Argentina, Canada, Guatemala, Latin America, Mexico, North America, Peru, United States
- Operating: Founded 1994
Dumas Contracting is a leading full-service underground mining contractor providing services to clients throughout the Americas. Beginning in 1994, the company has grown to become one of Canada’s largest mining contracting firms. Dumas specializes in mine construction, mine development, production mining, mine services and engineering.
Dumas delivers safe, innovative and expert mining solutions customized to meet the unique cultures, needs and challenges of each region. The company builds underground mines throughout the Americas, with services covering the complete project life cycle from concept to completion. The company’s commitment to safety, innovation and productivity has earned it a reputation for delivering quality results on time and on budget.
Dumas has multi-disciplined Engineering and Technical Services teams that offer practical, innovative and reliable designs with the ability to oversee entire mine infrastructure. The company’s technical services team has the capacity and expertise to undertake concept, pre-feasibility and feasibility studies, design, budgeting, and project and construction management. As an innovative shaft construction company, Dumas has numerous years of shaft construction experience with an excellent track record on construction safety and cost controls.
Dumas is one of the Americas’ leading shaft sinking contractors having undertaken numerous shaft sinking projects in North and Latin America, from the heights of the Peruvian Andes to the extremities of the deepest metalliferous mine in North America. Dumas is a leading provider of conventional open raising methods and mechanized raise climbing and can design and construct ventilation, manways, ore pass and waste pass raises. The company’s mechanized raise climbers are used in some of the deepest mines in North America and have successfully completed some of the most challenging raises on the continent.
Dumas’ core services include full-scale mine development with significant ramp and lateral development work undertaken in some of the world’s most challenging conditions. The company is an expert in both track and trackless development of any size, as well as exploration, development and production drifts. For mine infrastructure and construction, Dumas provides safe, innovative and efficient approaches to construction of shaft infrastructure (head frames, hoist facilities, shaft collars, etc.), shaft rehabilitation, portal construction, material handling systems (ore/waste flow circuits, crushing and conveying systems), pumping and dewatering systems, ancillary buildings and essentially all underground infrastructure installations.
Dumas is part of STRACON Group, a leading provider of specialized mining and infrastructure services across the Americas, delivering industrial services, fleet solutions, engineering and project infrastructure to some of the world’s largest mining operations. Through an exclusive partnership with Major Drilling, one of the world’s largest mining-focused drilling companies, Dumas offers production and longhole drilling services.
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Company details
- Projects and clients
- M Zone (Minto Metals, Yukon, Canada, copper and gold, 2012-2018), Oak Island (Tell Tale Productions, Oak Island Nova Scotia Canada, shaft recovery and rehabilitation 2022-2024), Yauliyacu (Wheaton Precious Metals, Lima Huarochirí Peru, copper lead silver zinc), Holt Mine (Agnico Eagle Mines Ltd, Black River-Matheson Ontario Canada, gold), Taylor Mine (Agnico Eagle Mines Ltd, Abitibi Greenstone Belt Ontario Canada, gold), Totten (Vale Canada Limited Vale S.A., Sudbury Ontario Canada, nickel copper cobalt platinum palladium gold), Éléonore (Dhilmar Ltd, gold), Lapa Mine (Agnico Eagle Mines Ltd, Cadillac Quebec Canada, gold), Roberto Letts (Volcan Compañía Minera Transition Metals AG, Yauli Junín Peru, silver lead copper zinc), Lac des Iles (Impala Canada Implats, Thunder Bay Ontario Canada, palladium nickel copper gold), Andaychagua (Volcan Compañía Minera Transition Metals AG, Santiago de Surco Lima Peru, zinc lead copper silver), Chungar (Volcan Compañía Minera Transition Metals AG, Peru, zinc lead copper silver), Westwood (IAMGOLD, Preissac Quebec Canada, gold), Pinos Altos (Agnico Eagle Mines Ltd, Chihuahua State Mexico, gold silver), Cerro Negro (Goldcorp Inc Newmont, Santa Cruz Argentina, gold), Saucito (Fresnillo PLC Minera Fresnillo S.A., Fresnillo Zacatecas Mexico, gold), Lalor Mine (HudBay Minerals, Snow Lake Manitoba Canada, zinc copper gold), San Miguel (Torex Gold Resources, Guerrero Mexico, gold silver), Fresnillo Mine (Fresnillo PLC Minera Fresnillo S.A., Fresnillo District Zacatecas Mexico, silver), Dome Mine (Goldcorp Inc, Timmins Ontario Canada, gold), Myra Falls (Nyrstar, Vancouver Island B.C. Canada, zinc copper gold), Kidd Mine (Glencore, Timmins Ontario Canada, copper), Hoyle Pond (Goldcorp Inc Newmont, Timmins Ontario Canada, gold), Bradshaw Mine (Gowest Gold Ltd, Timmins Ontario Canada, gold), Cerro Blanco (Entre Mares Guatemala S.A. Goldcorp, Asuncion Mita Guatemala near El Salvador border, gold), Mina Escobal (Tahoe Resources, Santa Rosa Department Guatemala, gold silver), Young-Davidson (Alamos Gold Inc, Matachewan Ontario Canada, gold), Timmins West Mine (Tahoe Resources Pan American Silver, Timmins Ontario Canada, gold), PureGold Mine (Pure Gold Mining Inc West Red Lake Gold Mines, Red Lake Ontario Canada, gold), Empire State (Titan Mining Corporation Augusta Group, Gouverneur New York United States, zinc), Mina Arista (Gold Resource Corp, Oaxaca Mexico, gold silver copper zinc lead), Bucko Mine (CaNickel Mining Ltd, Wabowden Manitoba Canada, nickel copper), Borden Mine (Goldcorp Inc Newmont, Chapleau Ontario Canada, gold), Casa Berardi (Hecla Mining Company, La Sarre Quebec Canada, gold silver), Bell Creek (Pan American Silver, Porcupine Ontario Canada, gold), El Limón (Torex Gold Resources, Guerrero Mexico, gold).
- Scale
- 50+ projects completed, 850+ skilled team members, 7+ active mining operations., 2008, employees, 30 years
- Also worth knowing
- Dumas has undertaken shaft sinking projects from the heights of the Peruvian Andes to the deepest metalliferous mine in North America. The company's mechanized raise climbers have successfully completed some of the most challenging raises on the continent.
Details prepared by MineListings. Dumas can update them by upgrading to Premium.
Where is Dumas listed in the directory?
Engineering & EPCM 155 companies Mining Consultants 277 companies Mining Contractors 78 companiesFrequently asked questions
What does Dumas supply?
Mine development, mine infrastructure and construction, shaft sinking, engineering, raising, production and longhole drilling, lateral and vertical development advance, mechanical support, contract mining, construction management, project management, procurement support, mining engineering concept, pre-feasibility and feasibility studies, design, schedule and budgeting, implementation and monitoring of underground development and construction, equipment specification and selection, water distribution, compressed air distribution, dewatering, ventilation, headcover and bulkhead design, mechanical engineering, layout drawing and general arrangements, conveyances and shaft conveyances (skips, cages, galloways, Alimak), custom sinking set-ups, hoisting facilities, crusher systems, QAQC inspections, stress analysis, reports and certifications, civil and structural engineering, portable headframes, civil foundation design, shaft rehabilitation, portal construction, material handling systems, ore and waste flow circuits, crushing and conveying systems, pumping and dewatering systems, ancillary buildings, underground infrastructure installations, ventilation raises, manway raises, ore pass raises, waste pass raises, conventional open raising methods, mechanized raise climbing, ramp development, lateral development, exploration drifts, development drifts, production drifts, track and trackless development, production mucking.
Where is Dumas based?
Toronto (headquarters), Timmins, Ontario, Canada; Wilmington, Delaware, United States; Mexico (Zacatecas).
Which industries does Dumas work in?
Gold, copper, nickel, zinc, lead, silver, cobalt, palladium, platinum.
What equipment or products does Dumas offer?
Mechanized raise climbers, Major Drilling fleet and proprietary equipment.
How long has Dumas been operating?
Founded 1994, over 30 years of underground mining experience.
How do I contact Dumas?
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