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Amazon Watch / Maíra Irigaray
The Belo Monte Dam on the Xingu River: 10 years of impacts in the Amazon and the search for reparations
The Belo Monte Dam has caused an environmental and social disaster in the heart of the Amazon—one of the most important ecosystems on the planet.
This situation has only worsened since the hydroelectric plant began operations in 2016. The quest for justice and reparations by the affected indigenous, fishing, and riverine communities continues to this day.
In 2011, the Inter-American Commission on Human Rights (IACHR) granted them protective measures that, to date, have not been fully implemented by the Brazilian State.
Furthermore, since June of that same year, the IACHR has yet to rule on a complaint against the State regarding its international responsibility in the case.
The IACHR may refer the case to the Inter-American Court of Human Rights, which has the authority to issue a ruling condemning the Brazilian State.
After 10 years of the hydroelectric plant's operation and more than 15 years of documented human rights violations, it is time for justice to be served for the affected communities.
Read the open letter from the organizations bringing the case before the IACHR
Background
The Belo Monte hydroelectric plant—the fourth largest in the world by installed capacity (11,233 MW)—was built on the Xingu River in Pará, a state in northern Brazil.
It was inaugurated on May 5, 2016, with a single turbine. At that time, 80% of the river’s course was diverted, flooding 516 km² of land—an area larger than the city of Chicago. Of that area, 400 km² was native forest. The dam began operating at full capacity in November 2019.
Belo Monte was built and is operated by the Norte Energia S.A. consortium, which is composed primarily of state-owned companies. It was financed by the Brazilian Development Bank (BNDES), which provided the consortium with 25.4 billion reais (approximately US$10.16 billion), the largest investment in the bank’s history. Therefore, the BNDES is also legally responsible for the socio-environmental impacts associated with the hydroelectric plant.
Decades of harm to the environment and people
Human rights violations and degradation of the Amazon have been occurring since the project’s inception. In March 2011, Norte Energía began construction of the dam without adequate consultation and without the prior, free, and informed consent of the affected communities.
The construction caused the forced displacement of more than 40,000 people, severing social and cultural ties. The resettlement plan in Altamira—a city directly affected by the hydroelectric dam—involved housing units located on the outskirts, lacking adequate public services and decent living conditions for the relocated families, with no special provisions for those from indigenous communities.
Belo Monte's operations have caused a permanent, man-made drought in the Volta Grande (or "Great Bend") of the Xingu River, exacerbated by the historic droughts in the Amazon in 2023 and 2024. As a result, the deaths of millions of fish eggs were documented for four consecutive years (from 2021 to 2024), and for the past three years, there has been no upstream migration of fish to spawn and reproduce. Thus, artisanal fishing, the main source of protein for indigenous peoples and riverside communities, was severely affected: fish dropped from 50% to 30% of total protein consumed, replaced by processed foods. In summary, there was an environmental and humanitarian collapse that resulted in the breakdown of fishing as a traditional way of life, food insecurity, and access to drinking water for thousands of families, impoverishment, and disease.
Furthermore, the construction of the dam increased deforestation and intensified illegal logging and insecurity on indigenous and tribal lands, putting the survival of these communities at risk. Another consequence was the deepening of poverty and social conflicts, as well as the strain on health, education, and public safety systems in Altamira—a city ranked as the most violent in the country in 2017, where human trafficking and sexual violence increased. Violence was also reported against human rights defenders involved in the case.
In 2025, during the 30th UN Climate Change Conference (COP30), held in Brazil, the Federal Public Prosecutor’s Office labeled the damage caused by the Belo Monte dam as ecocide.
Photo: Amazon Watch / Maíra Irigaray.
The search for justice and reparations
Over the years, the Federal Public Prosecutor’s Office in Pará, the Public Defender’s Office, and civil society organizations have filed dozens of legal actions in Brazilian courts to challenge the project’s various irregularities and its impacts. Most of the claims are still pending resolution, some for more than 10 years.
These efforts have failed because the national government has repeatedly overturned rulings in favor of the affected communities by invoking a mechanism that allowed a court president to suspend a judicial decision based solely on generic arguments such as "the national interest" or "economic order."
In the absence of effective responses at the national level, AIDA, together with a coalition of partner organizations, brought the case before the Inter-American Commission on Human Rights (IACHR) and, in 2010, requested precautionary measures to protect the lives, safety, and health of the affected indigenous communities.
On April 1, 2011, the IACHR granted these measures and requested that the Brazilian government suspend environmental permits and any construction work until the conditions related to prior consultation and the protection of the health and safety of the communities are met.
And on June 16, 2011 —together with the Xingu Vivo Para Sempre Movement, the Coordinating Committee of Indigenous Organizations of the Brazilian Amazon, the Diocese of Altamira, the Indigenous Missionary Council, the Pará Society for the Defense of Human Rights and Global Justice— we filed a formal complaint against the Brazilian State for its international responsibility in the violation of the human rights of the people affected in the case. The case was opened for processing in December 2015.
On August 3, 2011, the IACHR amended the precautionary measures to request, instead of the suspension of permits and construction, the protection of people living in voluntary isolation, the health of indigenous communities, and the regularization and protection of ancestral lands.
Photo: Amazon Watch / Maíra Irigaray.
Current situation
The protective measures granted by the IACHR remain in effect, but the Brazilian government has not fully complied with them, reporting only on general actions. The communities have documented the ongoing violations of their rights. The situation that prompted the request for these measures—the risk to the lives, physical integrity, and ways of life of the communities—persists and has worsened with the hydroelectric plant operating at full capacity and the recent extreme droughts in the Amazon.
In addition to the impacts of Belo Monte, there is a risk of further social and environmental impacts from the implementation of another mining megaproject in the Volta Grande do Xingu. There, the Canadian company Belo Sun plans to build Brazil’s largest open-pit gold mine.
The combined and cumulative impacts of the dam and the mine were not assessed. The government excluded Indigenous peoples, riverine and peasant communities from the project’s environmental permitting process. Despite protests by Indigenous communities and other irregularities surrounding the project, the government of Pará formally authorized the mine in April 2026.
Like other hydroelectric dams, Belo Monte exacerbates the climate emergency by generating greenhouse gas emissions in its reservoir. And it is inefficient amid the longer, more intense droughts caused by the crisis, as it loses its ability to generate power.
The case before the Inter-American Commission
In October 2017, the IACHR announced that it would rule jointly on the admissibility (whether the case meets the requirements for admission) and the merits (whether a human rights violation actually occurred) of the international complaint against the Brazilian State.
Fifteen years after the complaint was filed, the affected communities and the organizations representing them are still awaiting this decision. If the IACHR concludes that human rights violations occurred and issues recommendations that the Brazilian State fails to comply with, it may refer the case to the Inter-American Court of Human Rights, whose rulings are binding.
A potential ruling by the international court in this case would set a regional legal precedent regarding the rights of indigenous and riverine peoples, public participation in megaprojects, and state responsibility in the context of the climate crisis—a precedent that is particularly relevant in light of the Court’s Advisory Opinion No. 32, which reaffirmed the obligations of States to protect the people and communities of the continent from the climate emergency.
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The IDB's opportunity to support the protection of the environment and human rights
The Inter-American Development Bank Group (IDB Group) is uniquely positioned not only to support recovery efforts in Latin America and the Caribbean, a region hard hit by the pandemic, but also to do so with respect for people and the environment. The IDB Group—composed of the IDB, which works with governments; IDB Invest, which collaborates with the private sector; and IDB Lab, the bank’s innovation laboratory— is the continent's most important development financing entity. In 2020, it approved a record US$21.6 billion for its 26 member countries in the region. In addition to the challenge of leading the recovery of public finances, the current economic and social crisis represents an opportunity for the IDB Group to successfully face another major challenge: the adoption of operational policies that comply with international environmental and human rights standards, as well as improved accountability processes. 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Investor Alert: Belo Sun discloses misleading information to investors regarding controversial gold mining project in the Brazilian Amazon
In a complaint to the Ontario Securities Commission, an international coalition of civil society organizations calls attention to the repeated dissemination of misleading information by Belo Sun Mining Corp (TSXV:BSX), including statements by CEO Peter Tagliamonte, downplaying socio-environmental, legal, and financial risks of the company’s “Volta Grande” project along the Xingu River. Canadian-based mining company Belo Sun Corp.(TSXV:BSX) is disseminating misleading and incomplete information to investors about the mining project it is trying to develop on the Xingu river (Volta Grande do Xingu), Pará State, Brazil. This is the central message of a warning letter sent to the Ontario Securities Commission (OSC) on July 29rd by an international coalition of civil society organizations and networks including Amazon Watch, Earthworks, Instituto Socioambiental (ISA), Interamerican Association for Environmental Defense (AIDA), International Rivers, MiningWatch Canada, Movimento Xingu Vivo para Sempre and Rede Xingu+. The OSC is an independent Canadian Crown corporation responsible for protecting shareholders and investors from unfair, improper and fraudulent practices from companies and industries. Drafted by a legal team and supported by independent technical and scientific analysis, the complaint letter challenges recent statements by Belo Sun’s CEO Peter Tagliamonte. 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The coalition argues that there is overwhelming evidence that Belo Sun breached the Securities Act disclosure requirements, which requires companies to disclose material changes “forthwith” (without delay). Companies must disclose factual and updated data to keep investors well informed. Misleading information disclosed by Belo Sun Mining Corp. According to the complaint, while the company acknowledges the generic risks associated with the licensing process, it fails to disclose the concrete details of the legal actions and suspensions in play regarding its project, relying on investors' lack of knowledge concerning licensing legislation in Brazil. One example refers specifically to the suspension of its construction licence (LI), due to the lack of "free and informed consultation" of Indigenous peoples. In its more recent Corporate Update, Belo Sun states that "it continues to advance financial discussions with various groups in preparation for the commencement of construction following the lifting of the suspension of the construction license (LI)". "The company has not even started a consultation process, - which is now delayed by COVID-19 - and it is already advertising the lifting of the suspension, as if it was just a matter of time", says Marcella Ribeiro, attorney from AIDA's Human Rights and the Environment Program. "The company is not in a position to guarantee the results of the consultation process, as negotiations around consent are time-consuming and will invariably result in major material changes to the project. None of that is being disclosed properly to investors", she adds. Among the risks associated with investments in Belo Sun, the complaint highlights the history of judicial proceedings; conflict around the project; the flaws and gaps in the environmental impact assessment; and the violation of the Indigenous Peoples’ right to prior consultation. The downplaying of environmental and social risks by the company’s studies and impact assessments has sounded the alarm among communities in the Volta Grande region, already affected by the Belo Monte dam. A series of independent technical studies challenge Belo Sun’s statements regarding impacts to water resources, to fauna and flora, and regarding dam safety. The company’s refusal to acknowledge impacts in Indigenous territories along the Xingu river has led to the court decision that suspended the installation licence of the Volta Grande project in 2017 until "free and informed consultation" was carried out. There are also increasing accounts of intimidation and harassment against project opponents, which demonstrate a much more complex and contentious situation as a result of the project than what has been disclosed by the company, the complaint stresses. The coalition concludes that "Belo Sun has failed to fully communicate to current and potential investors about the complex nature of its project" which has a "direct implication for delays, and raises fundamental questions about the project’s viability". The letter delivered to the OSC aims to increase visibility to the many irregularities of the project and to raise awareness among current and potential investors about the major reputational and legal risks attached to the project, at a moment when heightened attention is focused on the Amazon rainforest and its capacity to provide environmental services and mitigate climate change. About Belo Sun’s Volta Grande Project Proposed for development along the Volta Grande (Big Bend), a stretch of the Xingu River (a major tributary of the Amazon) that is one of the most biodiverse locations on the planet, Belo Sun’s project would be the largest open pit gold mine in Brazil. The region is home to indigenous people such as Juruna (Yudjá), Arara, and Xikrin, along other isolated Indigenous and riverside communities. From the outset, Belo Sun has faced numerous lawsuits regarding the Volta Grande Project filed by the Federal Public Prosecutor's Office, the State Public Prosecutor's Office, the State Public Defender's Office, and the Union Public Defender's Office. All of these lawsuits refer to the multiple flaws in its licensing process and in the project’s technical studies. Among other things, the lawsuits seek the cancellation of the company's licences and the suspension of the project's licensing process. One of them resulted in a court decision, still valid, to suspend Belo Sun’s construction licence. press contacts Viviana Herrera, MiningWatch Canada, [email protected] Camila Rossi, Amazon Watch, [email protected] Cecilia Garcia, International Rivers, [email protected] Victor Quintanilla, AIDA, [email protected]
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