Brownfield First: The New Wave of Mining Investment in Chile

Chile’s mining sector is starting to build real momentum again, backed by one of the largest project pipelines globally, estimated at around US$104 billion through 2034. With the new government focusing on reducing permitting times and making approvals more efficient, there is a growing sense that projects that have been sitting for years could finally start moving toward construction.

We are already seeing early signs of that. In the past few weeks, the two largest projects submitted to Chile’s Environmental Assessment Service (SEA) since at least 1992 have been filed: a US$7.5 billion expansion by Freeport-McMoRan and a US$5.1 billion project from BHP.  These projects alone will drive significant demand for equipment, services, and technology solutions across the mining value chain.

Both are expansions of existing operations, reinforcing a trend we have seen in recent years where companies are prioritizing brownfield investments over greenfield risk. It is a more cautious approach, but these expansions play a key role in extending the life of existing mines well into the future.

Freeport El Abra Expansion – US$7.5b

Freeport-McMoRan has submitted a US$7.5 billion expansion of its El Abra copper operation in northern Chile to the Environmental Assessment Service (SEA), marking the largest mining project filed in the country in decades. The project is owned 51% by Freeport and 49% by Codelco.

At its core, this is a transition project. El Abra will move from a leaching-based operation to a large-scale concentrator, supported by a new desalination plant, a 150 km water transport system, and expanded processing infrastructure. The shift is significant, not just in scale, but in how the mine will operate going forward.

Production is expected to increase by more than 300,000 tonnes of copper per year, more than tripling current output and potentially positioning El Abra among the largest copper operations in Chile. The project would also extend the life of the mine to around 2070, reinforcing its role as a long-term asset.

From a timing perspective, the project is expected to take approximately three years to permit and four years to construct, with operations targeted for 2033. Like many recent investments in Chile, this is a brownfield expansion, building on existing infrastructure while reducing execution risk.

A key feature of the project is its water strategy. The development of a desalination plant and the implementation of water recycling technologies, including thickened tailings, are aligned with the broader shift in northern Chile toward more sustainable and secure water use. The shift from leaching to a concentrator-based operation also significantly increases the technical complexity of the asset, opening the door to a broader range of suppliers across processing, water, and operational optimization.

Overall, this project is a clear signal that large-scale, long-life copper investments are starting to move again in Chile.

BHP Escondida Concentrator Upgrade  – US$5b

BHP has submitted a US$5 billion project to Chile’s Environmental Assessment Service (SEA) to build a new concentrator at Escondida, the largest copper mine in the world. This is part of a broader investment plan in Chile that could exceed US$10 billion, focused on keeping production stable as ore grades decline and extending the life of its key assets.

At its core, this is not a growth project. The new concentrator is designed to maintain Escondida’s current processing capacity of around 460,000 tonnes per day by replacing the aging Los Colorados plant, which is reaching the end of its life. It reflects a broader trend in Chile, where companies are investing heavily just to sustain production levels.

The timeline is relatively clear. Permitting is expected to move quickly, with construction potentially starting around 2027 and first production targeted between 2031 and 2032.

The scale of the build is significant. The project is expected to employ around 2,500 workers on average during construction, with peaks of up to 6,000, which gives a sense of the level of activity and contracting involved.

In practical terms, this is a full replacement and integration project. It includes building a new concentrator with crushing, grinding, and flotation circuits, while also shutting down and replacing existing infrastructure. Because this is a brownfield project, a large part of the work will focus on connecting the new plant into Escondida’s existing systems, including conveyors, tailings, and transport infrastructure. It will also require increased mining activity and upgrades to water and environmental systems.

Overall, this is a multi-year construction program that will drive demand across engineering, equipment, integration, and long-term operational support.

Conclusion

What we are seeing today is not just two large projects moving forward, it is the early stages of a much broader shift in Chile’s mining sector. The pipeline is deep, capital is returning, and there is a growing alignment between government priorities and what investors need to move projects forward.

At the same time, the opportunity is expanding beyond traditional copper. Lithium is quickly becoming a second pillar of Chile’s mining future. The upcoming environmental filing of the Salar Futuro project, a joint venture between Codelco and SQM, is expected to anchor long-term production in the Salar de Atacama and could reach up to 300,000 tonnes per year of lithium carbonate equivalent. This, along with other partnerships under Chile’s lithium strategy, shows a clear move toward large-scale, long-life developments backed by both the state and private sector.

At the same time, new sources of capital are starting to look more seriously at Chile. Interest from countries like India, o Coal India Limited, which has approved the creation of a wholly owned Chilean subsidiary to pursue lithium and copper opportunities, backed by an initial investment of over US$750 million.

Overall, Chile remains one of the most important mining jurisdictions globally. It combines scale, technical expertise, and infrastructure with one of the largest undeveloped pipelines in the industry. The key variable remains execution. If permitting timelines improve and projects begin to move consistently into construction, Chile is well positioned to accelerate again.

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