MGC | Western Australia

Murchison Grade Control Pty Ltd is a specialist trenching contractor which began its services June 1988 at Peak Hill Gold Mine, Western Australia. In a span of 30+ years, the company has now grown its services and gathered valuable experience by working for more than 100 Gold and Lateritic Nickle Mines in Australia and West Ghana, Africa.

We have grown to become one of the preferred trenching contractors in Australia. We continually aim at expanding our services to other international regions as well. Our experience in working in different terrains has helped us improve the quality of our trenching services.

We value precision, ensuring that all projects are handled by highly experienced professionals. Our fleet is fitted with machines and equipment that help us complete our work quickly. Our team has worked for a variety of projects which helps us understand different requirements to ensure high satisfaction.



Hire Murchison Grade Control’s trenching services across Western Australia.

Hire specialised utility location and installation services across WA and SA.

Our history

Murchison Grade Control Pty Ltd (MGC) commenced operations in June 1988 at Peak Hill Gold Mine in Western Australia as a specialist trenching contractor for the grade control sampling of open pit gold mines. Another operation commenced in Mt Magnet to provide services to Western Mining Corporation Ltd at Hill 50 gold mine and other mines in the surrounding area. MGC has now provided services to over 100 operating gold and lateritic nickel mines in Australia as well as Ghana, West Africa.

Ditch Witch® trenching equipment for open pit grade control was pioneered by the Company's Director Warwick Archer and Geologist Adrian Griffin at Marvel Loch Gold Mine Western Australia in 1984. The success of this technique led to widespread use in the Goldfields of Western Australia and Northern Territory. Murchison Grade Control Pty Ltd was founded in 1988 to provide these services as a dedicated contractor.
Ute and Ditch Witch

Our innovation in trenching

The Ditch Witch® sample provides an excellent high-density continuous sample across strike-enhancing visual control and sub-surface exposure for mapping. Collection of the finely ground, well mixed sample is simple, fast, and labour efficient, and requires minimal additional laboratory preparation.


Trenching equipment uses the chain or boom with a continuous cutting chain, or the earth saw (rock saw), a rotating wheel with tungsten carbide teeth. Chain trenching is suitable for soft (free dig) oxide ores where greater depth is required. Rock saws are capable of digging in tougher ground conditions than the chain without varying trench depth.

Ditch Witch trenching blade

Our services

  • Open pit grade control
  • Airport lighting
  • Continuous trenching and rock sawing
  • Pit and pipe cable installation
  • Horizontal Directional Drilling (HDD)​
  • Horizontal Rock Directional Drilling (HDD)
  • Cable locating (Dial Before You Dig)
  • Backfill, compaction and reinstatement
  • All underground utility service installations
  • Wind farm cable installations
  • Solar farm trenching and cable laying
  • Exploration sample trenching
  • Minesite infrastructure services

Large trench

MGC consulting

Murchison Grade Control Pty Ltd’s two decades of experience in the grade control application of trenching machines has enabled it to provide valuable knowledge to mining companies on all aspects of this technique. We can advise on choice of services (contract, lease, or capital purchase), machine selection and options, machine preparation, operator and maintenance crew training, maintenance and repair procedures, transport & handling, operation in the grade control application and sampling techniques, spare parts inventories & acquisition and record keeping.

Underground Installations UGI & MGC Mining and Civil Consulting Services in Western Australia

The projects that made us

Ute and Ditch Witch

Bogosu Gold Mine grade control project

Ghana, West Africa, 1999-2001

Ditch Witch

Crescent Gold Ltd mineral sampling project

Western Australia, 2010-current

Medium length trench

Regis Resources mineral sampling project

Western Australia, 2011-current

Contact us

If you are interested in working with us, call today on (08) 8166 7267 for a quote or fill out our contact form to find out how we can help you.

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