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    PYBAR’s Sunday Creek decline: design and planning notes for narrow-vein teams

    June 29, 2026|

    Reviewed by Joe Ashwell

    First reported on International Mining – News

    30 Second Briefing

    PYBAR Mining Services, a Thiess company, has fired the first cut on an exploration decline portal at Southern Cross Gold’s Sunday Creek gold–antimony project in Victoria, marking the first new decline development in the state in about 20 years. The decline will provide underground access for close-spaced drilling of high-grade gold–stibnite veins rather than relying solely on surface drilling. For geotechnical and mine planning teams, this signals a shift towards underground evaluation of Victorian narrow-vein systems after a long hiatus in new decline development.

    Technical Brief

    • First cut at the exploration decline portal establishes the initial excavation profile and ground support regime.
    • PYBAR Mining Services, operating under Thiess ownership, is the underground contractor for decline development.
    • Southern Cross Gold Consolidated Ltd remains project owner and is funding the exploration decline works.
    • Location is the Sunday Creek gold–antimony project in Victoria, implying Victorian regulatory and approvals framework.
    • Exploration decline is described as a tunnel, indicating hard-rock development rather than boxcut-only access.
    • Portal firing marks transition from surface-based exploration to capital-intensive underground development activities.

    Our Take

    Gold dominates our mining coverage, but antimony appears in only a small fraction of those 420 keyword-matched pieces, so Sunday Creek positions Victoria as one of the relatively few jurisdictions in our database where gold and antimony are being advanced together at scale.

    Having PYBAR Mining Services under the Thiess umbrella on this Victorian decline gives Southern Cross Gold access to a contractor group that, in our database, is more commonly associated with large interstate and international projects, which may ease later scaling or financing discussions.

    The fact this is the first new decline in the State of Victoria in about 20 years suggests a permitting and community-relations pathway has been successfully navigated, which could lower perceived jurisdictional risk for other underground gold projects in the state appearing in our mining corpus.

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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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