Regis revives McPhillamys gold project: filtered tailings IWL lens for engineers
Reviewed by Joe Ashwell

First reported on Australian Mining
30 Second Briefing
Regis Resources has revived its stalled McPhillamys gold project in New South Wales with a new pre-feasibility study that reinstates a 1.89‑million‑ounce ore reserve and confirms filtered tailings co-disposed within an integrated waste landform (IWL) as the preferred development route. The shift from conventional tailings storage to filtered tailings in an IWL will drive different geotechnical design demands on stack stability, drainage and cover systems, and may reduce water consumption and dam risk. For engineers, the PFS signals a likely move towards dry-stack style tailings handling and integrated waste rock–tailings landforms on large Australian gold projects.
Technical Brief
- Ore reserve of 1.89 million ounces underpins long-life open pit scheduling and waste sequencing.
- Co-disposal within an IWL will drive integrated geotechnical design for both tailings and waste rock lifts.
Our Take
In our database, Regis Resources has recently reported a 120 per cent increase in ore reserves and a near A$1 billion liquidity buffer, suggesting the revived McPhillamys gold project in New South Wales is being advanced from a position of relatively strong balance sheet support rather than dependence on external funding.
Most recent Regis coverage centres on its Western Australian gold operations and the Duketon–Barminco alliance, so bringing the 1.89Moz McPhillamys reserve back into play signals a geographic rebalancing of the portfolio towards New South Wales within an otherwise WA-heavy asset base.
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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