- After decades of planning, the first shipment of iron ore from Guinea’s Simandou mines is on its way to China.
- The shipment marks the beginning of an era in which Guinea is expected to become one of the world’s leading producers of iron ore.
- Environmental advocates say that damage from the mines so far has gone largely unaddressed.
On Dec. 2, 2025, Guinea celebrated a milestone when a ship loaded with iron ore departed from the newly constructed port of Morebaya on the Atlantic coast. The shipment of 200,000 tonnes of ore, pulled out of the Simandou mountain range in the forested southeast, was destined for China.
Successive administrations in the capital Conakry have dreamed of turning the estimated 3 billion tons of ore in the Simandou deposits into cash for decades. Mamady Doumbouya, a military officer who seized power as interim president in 2021, put it at the center of his government’s promises to Guineans. After leaning on the two consortiums that operate mines in Simandou to fast-track construction of the 650-kilometer (400-mile) railway and port facilities needed to bring the ore to market, the first shipment left just weeks before he was elected president in late December.
In a symbolic gesture, it contained ore extracted by each of the two consortiums. Simfer is a joint venture between the Anglo-Australian giant Rio Tinto and a group of Chinese companies that includes the state-owned aluminum producer Chinalco. The other, Winning Consortium Simandou, is partly owned by Singaporean investors but is dominated by Chinese interests and firms like the China Baowu Steel Group.
Guinea’s government holds a 15% ownership stake in both projects, as well as in a separate joint venture established to build and then run the railway and port facilities needed to export the ore.
The shipment sets 2026 up to be the first year of a new era that Doumbouya’s government says will be transformative for the coastal West African nation. All told, the infrastructure for Simandou’s mining operations will cost more than $20 billion, financed by a combination of state-owned Chinese banks, commercial banks from elsewhere, and the companies themselves.
In an email to Mongabay, Simfer said that it expects to produce between 5-10 million metric tons of ore in 2026, ramping up to 60 million tons per year once additional infrastructure is built.
The International Monetary Fund says Simandou could become the largest iron mine on Earth, producing as much as 120 million metric tons of ore each year — potentially boosting Guinea’s GDP by more than 25% by 2030.
But environmentalists say that in the Simandou landscape where mining operations are now in full swing, their ecological cost is being shouldered by people and wildlife — and that legal challenges to the mine have been met with threats.
“We documented approximately 17 impacts in the Kérouané and Beyla areas, with the most significant impacts related to erosion caused by the company’s work on waterways,” said Amadou Bah, executive director of Action Mines Guinée.
Communities living near the mine and the railway have reported environmental impacts including polluted waterways and damaged farmland. Chimpanzees and other wildlife have also been affected by blasting and runoff from the railway’s development.
Last year, a study of water and soil samples taken near Simandou showed contamination downstream of the mine.
The Ghana-based NGO Advocates for Community Alternatives has assisted a group of communities in the region to challenge Winning Consortium Simandou’s environmental certification before Guinea’s Supreme Court. But while the mine’s development has raced forward, the case has moved slowly, and its lead counsel fled the country after facing anonymous threats.
“He received several threatening phone calls from unknown numbers calling him late at night, warning him to be very careful in this procedure because it could be costly,” said a legal officer with the NGO who asked to remain anonymous.
One of the complainants, a community leader from the town of Sekoussoriyah in Kindia prefecture, was also briefly detained by police and accused of “inciting other community members,” he added.
According to Bah, both consortiums are aware of the environmental impacts of their operations, with Rio Tinto offering to set up a compensation fund of around $100,000. Last year, WCS said it was committed to developing the project in accordance with Guinean regulations and international standards.
“Companies are more or less open to dialogue; even the Chinese companies are becoming more open,” he said.
The Simandou mines are strategically important for China, allowing its steelmaking companies to reduce their reliance on imports of iron ore from Australia. With this massive new source of ore from Guinea, the Chinese steel industry is projected to have increased leverage in global price-setting — a prospect that Doumbouya and Rio Tinto are both wary of, fearing that it could reduce their profits.
The high-grade ore from Simandou is also seen as relatively climate-friendly, given its suitability for lower carbon production of steel.
Doumbouya says that a portion of revenues will be deposited in a sovereign wealth fund rather than immediately spent, and his government has touted Simandou’s potential to finance road-building and other public works. But the IMF has warned that windfalls from the mining operations will need to be spent on education and infrastructure in order to meaningfully reduce poverty.
While Guinea’s 15% ownership stake in the ventures should give it it a notably higher share of revenues than other similar projects in neighboring countries, the full Simandou contracts are not public, meaning that provisions related to tax holidays and other details remain opaque.
“At the moment, I don’t have a value judgment on the contracts since they haven’t been fully disclosed,” said Bah.
Along with Simandou’s environmental costs, the projects are currently shedding jobs. After a high-stakes race to complete their export and production infrastructure, the overall number is set to decline from a high 60,000 to less than 15,000.
Doumbouya’s administration is banking on its ability to manage any fallout from both problems as it waits for revenue from Simandou to start hitting its accounts. With more ships set to leave Morebaya loaded with ore in 2026, and the country poised to become a leading global producer of the commodity, Guinea’s iron age has arrived.
Banner image: Loading a barge with iron ore from Simandou. Image by Paul Kagame via Flickr (CC BY-NC-ND 4.0)
Wildlife and communities bear the cost as Simandou rail corridor advances across Guinea
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