Pilgangoora P680–P1000 expansion: design and earthworks outlook for engineers
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
Pilbara Minerals used its AGM to detail expansion at the Pilgangoora lithium operation in Western Australia, where the P680 project is lifting nameplate capacity from about 580,000 tonnes per annum to roughly 680,000 tonnes of spodumene concentrate. The company is progressing early works on the larger P1000 expansion, targeting around 1 million tonnes per annum through additional crushing, grinding and flotation capacity and associated power and water upgrades. For geotechnical and civil contractors, the staged debottlenecking and plant footprint growth signal sustained demand for earthworks, tailings storage expansion and haul road upgrades.
Technical Brief
- Additional crushing, grinding and flotation trains will demand new foundations, structural steelwork and conveyor corridors.
- Water system changes will likely involve new pipelines, storage tanks and pump station earthworks within a constrained footprint.
- Higher concentrate output will drive incremental tailings storage facility lifts and embankment raises under ongoing operations.
- Haulage growth from expanded pits to plant suggests progressive haul road widening, regrading and pavement strengthening.
Our Take
Lithium pieces in our mining coverage have increasingly centred on Australian operations, so further expansion or contract activity at Pilgangoora reinforces Western Australia’s role as the core hard‑rock lithium supply base rather than newer African projects.
For Pilbara Minerals, additional project or contract milestones at the Pilgangoora operation signal that, despite volatile lithium prices in 2024–25, established Australian producers are still progressing site-level work rather than shelving brownfield opportunities.
Among the 125 tag‑matched ‘Projects’ and ‘Contract Award’ items in our database, lithium projects like Pilgangoora tend to move faster from award to execution than bulk commodity projects, which likely benefits PLS when timing market upswings.
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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