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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.
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.
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.
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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Inter-American Development Bank to investigate Ituango hydroelectric project
Washington D.C. In a historic decision, the Board of Executive Directors of the Inter-American Development Bank (IDB) approved an international investigation of the Bank’s private lending arm, IDB Invest, for its investment in the Ituango hydroelectric project. Located in the department of Antioquia, the Ituango dam has had a devastating impact on thousands of people across four departments and 27 municipalities in Colombia. The investigation’s main objective will be to determine whether—when financing this megaproject in a region of Colombia that continues to be affected by high levels of violence and resurgent armed conflict—the Bank complied with the social and environmental standards that it is obligated to uphold. The investigation will also examine whether any non-compliance by the Bank is connected to the serious harm that has been sustained by affected communities. “As those who have been affected by the Ituango dam, we demand that the investigation be rigorous and independent,” declared Isabel Zuleta, spokesperson for Movimiento Ríos Vivos in Colombia, which represents the affected communities. “For more than a decade, our communities have denounced the serious problems that the project has caused. These problems have been further exacerbated by the multiple emergencies that have occurred since 2018 and that continue to this day. We hope that, with this international investigation, the voices of victims and opponents of the project will finally be heard.” The investigation originated in a complaint filed by 477 people affected by the Ituango dam project. In the complaint, the affected communities—which are represented by Movimiento Ríos Vivos—emphasize that the Bank’s own policies require that the projects it finances must be sustainable, participatory, and in conformity with national legislation. In the case of the Ituango dam, none of this has happened. In the complaint, the communities indicate that the project lacked an adequate environmental impact assessment and that it did not allow for the participation of communities or provide access to information. They emphasize that the project has been advanced in a context marked by human rights violations, the disproportionate use of force, and increasing violence against people who defend their land and water. They also point out the pattern of discrimination faced by communities for deciding to oppose the project, as well as by women affected by the project. As the complaint lays out, all of this contradicts the social and environmental standards that the IDB must apply to its investments. Further, the complaint was filed in the wake of a humanitarian crisis that endangered the lives of thousands of people in the area surrounding the dam’s construction site. The crisis began after two of the dam’s diversion tunnels were blocked with cement, when a third tunnel became obstructed and the river’s flow increased dramatically. The resulting landslides and flooding forced thousands of people to be evacuated from their homes in a poorly planned, ad hoc manner, and many remain displaced to this day. No other development project in Colombia has caused a humanitarian crisis of this magnitude. This crisis reveals the inadequacy of both the impact assessment and the environmental regulation of the project, which—despite these deficiencies—was nevertheless approved. The state of emergency in the area affected by the crisis has yet to be lifted, and neither the government nor the regulatory agencies in Colombia have ruled out the possibility that the dam could collapse altogether. Even in this critical context, the affected communities sought to engage in a process of dialogue and dispute resolution with the company behind the dam project, which would have been facilitated by the IDB’s accountability mechanism. However, the company refused to participate in such a dialogue. For this reason, as the next step in the process following from the complaint, the accountability mechanism recommended this investigation. The communities affected by the Ituango dam, who live in the river basin of the Cauca River and its tributaries, are accompanied in the complaint process by the Center for International Environmental Law (CIEL), the Interamerican Association for Environmental Defense (AIDA), and International Accountability Project (IAP). The Ituango dam is expected to be the largest hydropower plant in Colombia, capable of generating 2,400 MW of electricity. Although the dam’s 79-kilometer-long reservoir was filled nearly two years ago, however, the dam has yet to generate any electricity. Moreover, the project has flooded 4,500 hectares without first removing the area’s vegetation, which is now generating large quantities of methane, a greenhouse gas. This flooding was undertaken even before the dam structure itself was completed and without informing, relocating, or compensating communities in the impacted area. IDB Invest has invested millions of dollars in the project and facilitated an additional billion-dollar investment in the project by other international banks. These investments have been maintained despite the grave crisis caused by the project. press contacts: Isabel Zuleta, Movimiento Ríos Vivos, [email protected] (Spanish only) Carla García Zendejas, Center for International Environmental Law, [email protected] Victor Quintanilla, Interamerican Association for Environmental Defense, [email protected] Alexandre Sampaio, International Accountability Project, [email protected] Note for editors: The investigation will be conducted by the Independent Consultation and Investigation Mechanism (MICI) of the Inter-American Development Bank. As an international accountability mechanism, the MICI addresses complaints from people and communities affected by IDB-funded development projects. The investigation will be carried out within a maximum period of nine months, in light of the high complexity of the case. Among the aspects of the project that will be investigated are the following: Whether the area of influence was adequately assessed and the affected population properly identified; The heightened levels of conflict and insecurity in the area surrounding the dam, and its differentiated impacts on women; The participation of communities, which—in the opinion of the communities themselves—has been seriously lacking; The relationship between the project and the damage caused; The deficiencies in the project’s resettlement plans and supposed compensation; The assessment of the risk of disasters, and access to information about these risks.
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Defending my place in the fight for the climate
I started at AIDA as a law student exploring the possibilities of working in the field of environmental law. Four years later, I am the youngest attorney on the organization's legal team, supporting the efforts of the Marine Biodiversity and Coastal Protection Program. I always say that the best part of my job is being surrounded by so many young, powerful and exemplary women. Their teachings have cemented my path. Last month, I participated in the preparatory meeting for the 25th Conference of the Parties (COP25) of the United Nations Framework Convention on Climate Change, which took place in Costa Rica. It was my first time at such an event. It was there that I really felt the strength of women and the younger generations, who have united to demand our place at the table to discuss solutions to the climate crisis. In recent months, we’ve seen the strength of global and regional movements of young people outraged by what they see as the inaction of governments to curb global warming. For the most part, young women, adolescents and even girls have led these movements. The climate meeting in Costa Rica was no exception, and reflected the generational change we are experiencing. In that forum, young people of various professions and aspirations made our claim and sought to be heard. We were united by a common purpose: to guarantee our future and to be better than present generations in fulfilling that goal. Millennials (the generational group to which I belong) and the centennials (to which my 13-year-old sister belongs) are the ones who will have to live with the consequences of political inaction in the face of the climate crisis. It is our future that is at stake. Women are especially vulnerable to environmental degradation due to the special role we play in caring for natural resources and the people around us. That is why it’s good news that we’re rising up and demanding clear, concrete and, above all, urgent actions. This PreCOP was an opportunity for learning and growth. I identified with the emphasis that the government of Costa Rica placed on the protection of the ocean and solutions based in nature. And I was inspired to see more and more young women taking the lead in the determined and ambitious actions that the world's environmental and social crises require us to take.
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Statement on the suspension of COP25 in Chile
Today the Chilean government, after two weeks of mass demonstrations, cancelled the twenty-fifth Conference of the Parties (COP25) to the United Nations Framework Convention on Climate Change, scheduled for December in Santiago. We lament the decision and express our support to the Chilean people, facing a difficult situation that makes the nation unable to guarantee the safety that an event of such magnitude requires. We call on the Chilean State to ensure that the process of change the country is going through is developed with respect for the human rights of all those involved. Abuse from public forces is unacceptable, especially in a process that seeks to repair the social wounds that tarnish our societies. The Chilean government must comply with its human rights obligations. We also urge the State and private sector to take firm steps towards transforming Chile into a country with greater social, environmental and climate justice; and to set an example for Latin America, a region where inequality and injustice have intensified over the years. Underlying the social crisis in Chile is a very serious environmental crisis that has long corroded equity and is part of the spark that ignited social discontent. Two examples of this inadmissible reality include sacrifice zones, where coal-fired power plants have condemned families to suffering a large part of the country's atmospheric pollution, making them sick and truncating their development; and the privatization of water, meaning Chile fails to recognize access to drinking water and sanitation as a human right, and does not prioritize their use for human consumption and the maintenance of ecosystems. Similar problems occur in other countries of the region. We hope that Chile will continue in its role as President of the COP, pushing with more force than ever toward ambitious climate commitments that will help us keep global warming under control while complying with the Paris Agreement. The events of the past month clearly demonstrate that, in the face of crises, changes must come from the people, always protecting and favoring the most vulnerable members of society. Indigenous peoples and rural communities, who have suffered hardest from social and environmental injustice, can often best contribute to the solutions our planet needs. All efforts to combat the climate crisis must ensure a just, participatory energy transition that respects human rights. Chile today has the opportunity to make history by including environmental protection and climate justice as pillars in the construction of a cleaner, fairer and more equitable future. We warmly call on the international community to join in this show of support for the people of Chile. PRESS CONTACT: Victor Quintanilla (México), [email protected], +5215570522107
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