Production Risks Rise at Chile's Copper Operations Amid Strikes and Weather Challenges
New assessments reveal that 5.2% of production at major Chilean copper mines is at risk due to strikes, weather, and geological issues, highlighting supply vulnerabilities.
Recent findings from GEM Mining Consulting have highlighted significant production risks at Chile's major copper operations, suggesting that a substantial 5.2% of the output is vulnerable due to various threats, including labor strikes, adverse weather conditions, accidents, and geological complications. This assessment indicates that nearly one in ten tonnes produced at these operations could be at stake.
The inaugural Production-at-Risk Index evaluated 14 significant mines across Chile, assigning risk levels based on an analysis of eight different factors. The results reveal a broad range of vulnerabilities—El Teniente faces the highest risk at 9%, followed closely by Los Pelambres at 8% and Escondida at 7.5%. Notably, nine of the assessed mines carry at least one risk that has been classified as high.
The analysis comes on the heels of a turbulent period for Chile, which is the world's leading copper producer. Recently, Antofagasta's Centinela mine has been struck by labor unrest, with workers initiating an indefinite strike. Additionally, BHP's Escondida mine was temporarily shut down following a fatal incident, while severe storms have caused disruptions at both Los Pelambres and Lundin Mining's Caserones operations. Codelco has also halted work on its Andes Norte project at El Teniente due to fears of seismic activity.
Analysis of Risks
The mining landscape in Chile reveals that the most at-risk operations often have several overlapping vulnerabilities rather than being threatened by a single cause. For example, El Teniente combines high geotechnical and safety risks with four additional concerns rated at medium levels. In contrast, Los Pelambres is particularly exposed to weather and water-related challenges, while Escondida has notable high-risk ratings for labor issues and safety measures.
The situation at Centinela illustrates the concerns around labor volatility, with over 700 workers walking off the job on October 7, following unsuccessful mediation attempts. There are also medium-rated risks related to metallurgy and the ramp-up performance of operations.
Conversely, some mines like Radomiro Tomic, Spence, and Ministro Hales are currently categorized as having no high risks associated, indicating a disparity in risk profiles across Chile's copper mines. This suggests that while some operations might be functioning smoothly, others are under significant threat.
Methodology of the Production-at-Risk Index
The GEM study measures production vulnerability by estimating potential losses across eight categories: labor, water, weather, geotechnical conditions, metallurgy and grades, ramp-up performance, safety, and permitting. Each mine receives a rating of low, medium, or high based on public evidence relating to 2025 and 2026 production forecasts. A high rating corresponds to an expected production loss of 3%, equating to about 11 days of annual output, whereas medium and low ratings correspond to 0.75% (around three days) and 0.19% (less than a day) respectively.
Notably, the methodology compounds the effects of these risks rather than adding them linearly. According to GEM, future iterations of the index may incorporate individual mines' historical operating data to create more accurate probability distributions and expected severity assessments.
Currently, labor risk, along with metallurgy and grade concerns, represents the most significant contributors to the overall production risk, averaging 0.83 percentage points each. Weather and safety risks follow closely at 0.79 percentage points each. In several instances, specific mines exemplify how distinct risk factors can translate into substantial production challenges. For example, Collahuasi has faced severe metallurgy and grade risks due to a declining ore grade, contributing to a 27% output drop in 2025.
In the case of Chuquicamata, high safety risks stemming from accidents have reduced output by 13%, while the ongoing construction of a tailings storage facility at Quebrada Blanca has introduced high ramp-up risks that are also hampering production flows. Geological considerations have similarly impacted Gabriela Mistral, leading to a 20% decline in output.
The index should be interpreted as a measure of exposure rather than a definitive prediction that 5.2% of total production will necessarily be lost. GEM emphasizes that the ratings are rooted in standardized assessments and available public evidence, meaning a risk identified could potentially never occur, while a different, unanticipated disruption might emerge.
In summary, the GEM assessment underscores the critical disconnect that can exist between projected copper production capacities and actual supply reliability. As things stand, one in every 20 kilograms of expected copper output from these large operations in Chile hinges on the assumption that identified risks do not materialize. At El Teniente, this exposure increases to nearly one in ten kilos.
With the ongoing strike at Centinela and the cumulative operational risks affecting several other prominent mines, market participants need to remain vigilant about the potential impact on copper supply in a landscape heavily reliant on Chilean production.
