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    Caledonia’s Bilboes gold project: design and risk notes for open-pit planners

    November 25, 2025|

    Reviewed by Joe Ashwell

    Caledonia’s Bilboes gold project: design and risk notes for open-pit planners

    First reported on MINING.com

    30 Second Briefing

    Caledonia Mining is advancing the Bilboes gold project in Zimbabwe after a positive feasibility study confirmed its potential to become the country’s largest single gold mine by production. The study supports a large-scale open-pit operation with a central processing plant, positioning Bilboes ahead of Caledonia’s existing Blanket Mine in planned output. For geotechnical and mine planning teams, the shift to a major greenfield open pit in Zimbabwe signals upcoming demand for large waste dumps, pit slope design under tropical weathering profiles, and grid-power-dependent processing infrastructure.

    Technical Brief

    • Feasibility study confirms a conventional open-pit truck-and-shovel operation feeding a centralised processing plant.
    • Bilboes is being advanced as a greenfield development distinct from Caledonia’s existing underground Blanket Mine.
    • Project planning assumes grid-connected power as the primary energy source rather than standalone diesel generation.
    • Central plant configuration implies multiple satellite pits or cutbacks converging on a single processing hub.
    • Mine development will require large engineered waste rock dumps and tailings storage facilities on previously undeveloped land.
    • Transition from underground to large open pit within Caledonia’s portfolio will alter geotechnical design focus and skill requirements.
    • Outcomes at Bilboes are likely to influence financing appetite for other large-scale Zimbabwean gold mining projects.

    Our Take

    Zimbabwe has featured far less than West African jurisdictions in our recent gold project coverage, so Caledonia’s push at Bilboes signals that some operators still see acceptable risk–reward in the country despite policy and forex headwinds.

    Among the gold-tagged project stories in our database, most contract awards have been for incremental expansions rather than new large-scale builds, suggesting Bilboes could reposition Caledonia from a single-asset producer into a more regionally significant player if fully developed.

    For contractors, a major gold project in Zimbabwe widens the African project pipeline beyond the usual Ghana–Mali–Burkina Faso axis seen in our Mining ‘Projects’ coverage, but will likely require stronger local-content strategies and currency-risk provisions in contracts.

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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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