Grasberg Copper Mill Reaches 67% After Indonesia Mudslide
Freeport-McMoRan’s Grasberg complex in Indonesia processed at about 67% of normal milling rates in the third quarter, a year after a mudslide killed seven workers and halted operations. The company expects a phased recovery through 2027.
By DoomRadar · Published on DoomRadar . Updated .
How the effects could reach youConditional effects
Based on two sources with available article excerpts. Source-linked claims are not independent confirmation.
Event date: The company’s third-quarter operating rate and recovery outlook were reported on October 2, 2026; the mudslide occurred the previous year. [1][2]
What happened
Freeport-McMoRan said its Grasberg copper-gold complex in Central Papua processed about 140,000 tonnes of ore per day during the third quarter, averaging roughly 67% of normal milling rates. [1]
References for this detail (1)
- Freeport's Grasberg copper mill reaches 67% after last year's mudslidenorthernminer.com · Article published: Oct 2, 2026, 7:07 PM UTC
The improvement follows a mudslide the previous year that killed seven workers and shut the operation. Reuters reported that the closure lasted nearly a month before recovery work began. [2]
References for this detail (1)
- Freeport Says Indonesia's Grasberg Mine Ramp-up on Track after Mudslide Disruptionenglish.kontan.co.id · Article published: Oct 3, 2026, 12:05 AM UTC
Freeport said upgrades to the Grasberg Block Cave underground material-handling system remained on schedule for completion in early 2027. The system is part of the staged restart plan. [1][2]
References for this detail (2)
- Freeport's Grasberg copper mill reaches 67% after last year's mudslidenorthernminer.com · Article published: Oct 2, 2026, 7:07 PM UTC
- Freeport Says Indonesia's Grasberg Mine Ramp-up on Track after Mudslide Disruptionenglish.kontan.co.id · Article published: Oct 3, 2026, 12:05 AM UTC
The company is preparing to restart production from Production Block 1S by mid-2027. Freeport expects that step, alongside the infrastructure upgrades, to lift the complex to about 80% of capacity. [1][2]
References for this detail (2)
- Freeport's Grasberg copper mill reaches 67% after last year's mudslidenorthernminer.com · Article published: Oct 2, 2026, 7:07 PM UTC
- Freeport Says Indonesia's Grasberg Mine Ramp-up on Track after Mudslide Disruptionenglish.kontan.co.id · Article published: Oct 3, 2026, 12:05 AM UTC
Context from the sources
Grasberg is described as one of the world’s largest copper and gold deposits and a core source of Freeport’s production. Benchmark Mineral Intelligence estimated that the earlier closure removed 278,000 tonnes of copper from 2025 supply, or about 1.2% of global mine output. [1]
Explore the sources and reporting timeline
2 source links · 2 domains
These counts describe the references, not independent confirmations. Different outlets can repeat the same original report.
Source timeline
Oldest to newest among the available source dates, not a chronology of the incident. Article publication dates come from the source; other recorded dates may reflect when a link was found.
- [1] Freeport's Grasberg copper mill reaches 67% after last year's mudslidenorthernminer.comReferenced for: detail 1, detail 3, detail 4
- [2] Freeport Says Indonesia's Grasberg Mine Ramp-up on Track after Mudslide Disruptionenglish.kontan.co.idReferenced for: detail 2, detail 3, detail 4
Questions answered by the reporting
What this could mean for you
Industrial users of copper could face continued supply uncertainty rather than an immediate household shortage.
Grasberg remains below normal output, leaving part of a major mine’s production unavailable while recovery continues.
Reported basis: [1][2] · The possible effect is interpretation.
Depends on: A delayed ramp-up or further operational setback would prolong the reduced supply.
Possible time frame: months, if those conditions hold.
Workers and contractors connected to the mine may remain affected by the staged restart.
Production blocks and material-handling infrastructure are returning in phases rather than simultaneously.
Reported basis: [1][2] · The possible effect is interpretation.
Depends on: The effect depends on the timing of the planned 2027 construction and restart milestones.
Possible time frame: months, if those conditions hold.
Possible consequences, not a forecast. Their relevance depends on your location and the conditions above.
For your country
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What changes the outlook
Risk increases if…
A delay to the early-2027 material-handling upgrades could postpone the planned production increase.
Failure to restart Production Block 1S by mid-2027 could keep the complex below its stated 80% target.
Pressure eases if…
Completion of the material-handling upgrades would support the next planned production increase.
A successful Production Block 1S restart would move Grasberg closer to normal output.
Still unclear
The sources do not establish whether the recovery schedule will be completed on time.
They do not provide current copper or gold price effects attributable to the reduced output.
Market implications
Market impact
Sources (2)
References for the reported details. Separate links do not necessarily mean independent confirmation.
Available excerpt
Posted By: Henry Lazenby October 2, 2026 Freeport-McMoRan (NYSE: FCX) averaged nearly two-thirds of normal milling rates at its Grasberg copper-gold complex in Indonesia during…A short excerpt from our source record; open the original for the full article.
Available excerpt
ILUSTRASI. Freeport-McMoRan said on Friday progress at its Grasberg Block Cave underground mine in Indonesia is on track (Dok/PTFI) Source: Reuters | Editor: Khomarul Hidayat…A short excerpt from our source record; open the original for the full article.
First tracked by DoomRadar: . AI-assisted analysis · . Based on linked headlines and available excerpts. Methodology · Report an error.