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    Macmahon–Black Cat underground extension: planning notes for Majestic mine production

    May 28, 2026|

    Reviewed by Tom Sullivan

    Macmahon–Black Cat underground extension: planning notes for Majestic mine production

    First reported on Australian Mining

    30 Second Briefing

    Macmahon Holdings has secured a 12‑month extension for underground mining services at Black Cat Syndicate’s Majestic gold mine in Western Australia, awarded through its wholly owned subsidiary Macmahon Underground. The deal follows completion of the underground portal and first ore delivery from Majestic to Black Cat’s Lakewood mill near Kalgoorlie, confirming the mine’s transition from development to steady-state production. For contractors and mine planners, the extension signals continuity of decline development, stoping and backfill scheduling under a single operator across the Majestic–Lakewood circuit.

    Technical Brief

    • Scope remains with Macmahon’s specialist unit, Macmahon Underground, rather than the surface mining business.
    • Contract continuity allows a single mining method and equipment fleet to be maintained across the Majestic workings.
    • Operational integration with Black Cat’s Lakewood processing facility reduces interface risk between underground production and milling.
    • Single‑operator arrangement simplifies mine scheduling, particularly for matching stoping output to Lakewood plant campaigns.

    Our Take

    Macmahon Holdings’ recent Letters of Intent at the Wonawinta silver project in New South Wales and Mount Carlton gold mine in Queensland suggest the Majestic mine extension in Western Australia is part of a deliberate push to keep underground and restart work spread across multiple Australian jurisdictions, smoothing utilisation of its underground fleet and crews.

    Within our mining-projects and contract-award coverage, Macmahon’s mix of shorter 12‑month extensions such as at Majestic and longer multi‑year deals like the Byerwen coking coal contract indicates a portfolio strategy that balances near‑term cash flow from smaller gold operations with longer-duration base load work in coal and major iron ore infrastructure.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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