Project
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.
Partners:
Related projects
Inter-American Development Bank washes its hands of responsibility for dangerous Hidroituango dam and related human rights violations in Colombia
Fearing imminent collapse of the dam, communities in Antioquia, Colombia, have learned that the public lending arm of the Inter-American Development Bank (IDB) will not be investigated. Washington, DC — Last month, the Board and management of the Inter-American Development Bank (IDB) announced it would not approve an investigation of the Bank’s role in financing the construction of the controversial Ituango Hydroelectric Project (Hidroituango) in Colombia. The decision disregards allegations of acute and far-reaching harms caused by the project, including a humanitarian crisis that has displaced hundreds of families and caused human rights abuses, including assassination and intimidation of community members who oppose the project. The announcement comes more than a year after communities affected by the construction of the Hidroituango dam on the Cauca River in Antioquia, Colombia, filed a claim with the Independent Consultation and Investigation Mechanism (MICI). The claim, signed by more than 400 individuals affected by the dam, sought recourse from the MICI for the IDB’s alleged failure to comply with its own environmental and social safeguards. "We publicly denounce the IDB’s decision to evade its responsibility for the environmental damage and human rights violations resulting from the Hidroituango project, and we condemn the role of the MICI in facilitating and manifestly supporting this decision,2 remarked Isabel Zuleta, representative of Movimiento Ríos Vivos Antioquia. "It is unconscionable that the IDB is attempting to rewrite history by absolving itself from its responsibility for enabling and financing high-risk development projects that have extreme environmental impacts and blatantly violate human rights," added Zuleta. The IDB has two lending arms, one that invests in the public sector (the IDB) and another that invests in the private sector (IDB Invest). The MICI is the accountability mechanism of the bank, in charge of evaluating environmental and social compliance of the institution’s investments. The IDB initially invested in the Hidroituango project in 2012, which paved the way for and facilitated millions of dollars of additional investments from the IDB, as well as an additional billion from other international banks. The MICI, whose mandate is to provide accountability for harms caused by IDB investments, recommended no investigation of the IDB’s role in the project. Despite the decision not to review the IDB’s compliance, the MICI could continue its investigation regarding IDB Invest’s investment in the Hidroituango project. However this will depend completely on approval by the Bank’s Board. Before the dam was approved, communities warned of precisely the environmental and social impacts that have occurred. "For an institution that seeks to improve the lives of people in Latin America, the IDB’s decision is absurd, irresponsible, and disrespectful. It exemplifies a complete disregard for people living within the Cauca River Basin. Unfortunately, this disregard too often characterizes the IDB’s engagement in large-scale infrastructure projects throughout the region," said Alexandre Andrade Sampaio of International Accountability Project. "What is the value of environmental and social policies at the IDB, when they are ignored and dismissed precisely when they are most needed to protect people’s lives? This lack of accountability is unacceptable, and it demonstrates why communities affected by the actions of development banks have found it necessary to resort to the courts to secure their rights," remarked Carla García Zendejas, Senior Attorney at the Center for International Environmental Law (CIEL), in reference to the recent US Supreme Court decision in Jam v. IFC, which recognized that international organizations such as the IDB are not immune from litigation in US courts. "This decision exemplifies the perils of an accountability mechanism that lacks the independence and legitimacy to initiate and carry out a genuine investigation of a bank’s projects," added García Zendejas. "Since day one, the Hidroituango project carried out a weak impact assessment, inaccurate surveys of affected people and deficient environmental implementation and monitoring, but the IDB has continued to invest in it," sustained Carlos Lozano, Senior Attorney at the Interamerican Association for Environmental Defense (AIDA). "The project was approved and is under construction without having previously carried out an evaluation of alternatives," he pointed out. Members of Movimiento Ríos Vivos Antioquia, who represent affected communities in the complaint, continue to receive ongoing threats and suffer intimidation, homicides, and other forms of violence. The IDB has shown its disregard for the volatile situation surrounding Hidroituango, including the continued presence of paramilitary groups in the area. The IDB has also ignored community requests to delay dam construction to exhume mass graves from the armed conflict in the area affected by the dam. Press Contacts: Isabel Zuleta, Movimiento Ríos Vivos Antioquia, +57 3217347264, [email protected] (Spanish) Carla Garcia Zendejas, Center for International Law, +1 202 374 2550, [email protected] Alexandre Andrade Sampaio, International Accountability Project, [email protected] Carlos Lozano Acosta, Interamerican Association for Environmental Defense, [email protected] Note for editors: The Ituango hydroelectric plant will be the largest in Colombia, with a 49-mile (79 km) reservoir that will flood a surface of 11,120 acres (4,500 hectares). The IDB Group has financed the project through various types of investment: initially $2 million in technical cooperation for the Colombian State in 2012 and then $550 million in direct investments in 2016 to Empresas Públicas de Medellín (EPM), the company in charge of the project. Additionally, the IDB manages a $1 billion dollar loan package, with funds from multiple institutional investors, including European banks. After a construction failure at the dam construction in May 2018, more than 25,000 people had to be evacuated from the area due to flooding, landslides, and avalanches. The humanitarian crisis has worsened dramatically: people have lost their property, livelihoods, and access to health and education services, which have always been meager in the area. Many people have been displaced and those who have stayed are not properly cared for. In addition, people who are members of Movimiento Ríos Vivos are discriminated against. There is a lack of food, people suffer from diseases, and shelters are deficient. People are pressured to return to risk areas and sign documents waiving their claims. In short, communities are facing a situation of systematic human rights violations as a result of the project.
Read moreInter-American Development Bank washes its hands of responsibility for dangerous Hidroituango dam and related human rights violations in Colombia
Fearing imminent collapse of the dam, communities in Antioquia, Colombia, have learned that the public lending arm of the Inter-American Development Bank (IDB) will not be investigated. Washington, DC — Last month, the Board and management of the Inter-American Development Bank (IDB) announced it would not approve an investigation of the Bank’s role in financing the construction of the controversial Ituango Hydroelectric Project (Hidroituango) in Colombia. The decision disregards allegations of acute and far-reaching harms caused by the project, including a humanitarian crisis that has displaced hundreds of families and caused human rights abuses, including assassination and intimidation of community members who oppose the project. The announcement comes more than a year after communities affected by the construction of the Hidroituango dam on the Cauca River in Antioquia, Colombia, filed a claim with the Independent Consultation and Investigation Mechanism (MICI). The claim, signed by more than 400 individuals affected by the dam, sought recourse from the MICI for the IDB’s alleged failure to comply with its own environmental and social safeguards. "We publicly denounce the IDB’s decision to evade its responsibility for the environmental damage and human rights violations resulting from the Hidroituango project, and we condemn the role of the MICI in facilitating and manifestly supporting this decision,2 remarked Isabel Zuleta, representative of Movimiento Ríos Vivos Antioquia. "It is unconscionable that the IDB is attempting to rewrite history by absolving itself from its responsibility for enabling and financing high-risk development projects that have extreme environmental impacts and blatantly violate human rights," added Zuleta. The IDB has two lending arms, one that invests in the public sector (the IDB) and another that invests in the private sector (IDB Invest). The MICI is the accountability mechanism of the bank, in charge of evaluating environmental and social compliance of the institution’s investments. The IDB initially invested in the Hidroituango project in 2012, which paved the way for and facilitated millions of dollars of additional investments from the IDB, as well as an additional billion from other international banks. The MICI, whose mandate is to provide accountability for harms caused by IDB investments, recommended no investigation of the IDB’s role in the project. Despite the decision not to review the IDB’s compliance, the MICI could continue its investigation regarding IDB Invest’s investment in the Hidroituango project. However this will depend completely on approval by the Bank’s Board. Before the dam was approved, communities warned of precisely the environmental and social impacts that have occurred. "For an institution that seeks to improve the lives of people in Latin America, the IDB’s decision is absurd, irresponsible, and disrespectful. It exemplifies a complete disregard for people living within the Cauca River Basin. Unfortunately, this disregard too often characterizes the IDB’s engagement in large-scale infrastructure projects throughout the region," said Alexandre Andrade Sampaio of International Accountability Project. "What is the value of environmental and social policies at the IDB, when they are ignored and dismissed precisely when they are most needed to protect people’s lives? This lack of accountability is unacceptable, and it demonstrates why communities affected by the actions of development banks have found it necessary to resort to the courts to secure their rights," remarked Carla García Zendejas, Senior Attorney at the Center for International Environmental Law (CIEL), in reference to the recent US Supreme Court decision in Jam v. IFC, which recognized that international organizations such as the IDB are not immune from litigation in US courts. "This decision exemplifies the perils of an accountability mechanism that lacks the independence and legitimacy to initiate and carry out a genuine investigation of a bank’s projects," added García Zendejas. "Since day one, the Hidroituango project carried out a weak impact assessment, inaccurate surveys of affected people and deficient environmental implementation and monitoring, but the IDB has continued to invest in it," sustained Carlos Lozano, Senior Attorney at the Interamerican Association for Environmental Defense (AIDA). "The project was approved and is under construction without having previously carried out an evaluation of alternatives," he pointed out. Members of Movimiento Ríos Vivos Antioquia, who represent affected communities in the complaint, continue to receive ongoing threats and suffer intimidation, homicides, and other forms of violence. The IDB has shown its disregard for the volatile situation surrounding Hidroituango, including the continued presence of paramilitary groups in the area. The IDB has also ignored community requests to delay dam construction to exhume mass graves from the armed conflict in the area affected by the dam. Press Contacts: Isabel Zuleta, Movimiento Ríos Vivos Antioquia, +57 3217347264, [email protected] (Spanish) Carla Garcia Zendejas, Center for International Law, +1 202 374 2550, [email protected] Alexandre Andrade Sampaio, International Accountability Project, [email protected] Carlos Lozano Acosta, Interamerican Association for Environmental Defense, [email protected] Note for editors: The Ituango hydroelectric plant will be the largest in Colombia, with a 49-mile (79 km) reservoir that will flood a surface of 11,120 acres (4,500 hectares). The IDB Group has financed the project through various types of investment: initially $2 million in technical cooperation for the Colombian State in 2012 and then $550 million in direct investments in 2016 to Empresas Públicas de Medellín (EPM), the company in charge of the project. Additionally, the IDB manages a $1 billion dollar loan package, with funds from multiple institutional investors, including European banks. After a construction failure at the dam construction in May 2018, more than 25,000 people had to be evacuated from the area due to flooding, landslides, and avalanches. The humanitarian crisis has worsened dramatically: people have lost their property, livelihoods, and access to health and education services, which have always been meager in the area. Many people have been displaced and those who have stayed are not properly cared for. In addition, people who are members of Movimiento Ríos Vivos are discriminated against. There is a lack of food, people suffer from diseases, and shelters are deficient. People are pressured to return to risk areas and sign documents waiving their claims. In short, communities are facing a situation of systematic human rights violations as a result of the project.
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AIDA Statement on the crisis in the Amazon
AIDA expresses deep concern about the grave situation confronting the Amazon, which is being ravaged by a large number of fires in Brazil and other Amazonian countries. The consequences of these fires are devastating for the biodiversity of the area and for the communities that inhabit it, but also for the planet, which is facing a climate crisis that requires increasingly urgent and effective actions. The Amazon holds 20% of the Earth's unfrozen fresh water and is home to a quarter of the world's species. In addition, the Amazon jungle releases about 20% of the oxygen we breathe and stores 90 to 140 billion tons of carbon dioxide, regulating the global climate. The international scientific community has emphatically pointed out that the destruction of tropical forests causes 20% of greenhouse gas emissions. For this reason, the Amazon ecosystem is vital for mitigating the climate crisis. The current fires demonstrate that the Amazon is now more vulnerable than before due to a combination of factors, including increased droughts, deforestation, unsustainable use of soil and subsoil, and the increase in global temperatures. The record number of fires in the Amazon rainforest aggravates the climate crisis and with it the threat of increasingly harmful natural disasters. The policies, rhetoric and actions of Jair Bolsonaro's government have the same impact, actively dismantling due protection of the Amazon and its indigenous peoples. They irresponsibly promote the expansion of the agricultural, livestock and extractive frontier in the Amazon, resulting in increased deforestation and the consequences we are witnessing today. This worrying trend is repeated in the rest of the countries called upon to protect the Amazon basin—Bolivia, Peru, Ecuador, Colombia and Venezuela—whose governments also have not done enough to preserve the Amazon. AIDA urges the governments of the Amazon basin to adopt urgent measures to stop the fires. In addition, we call on citizens and the international community to pressure the governments of Brazil and the other countries of the region to reverse course and effectively protect the Amazon, its biodiversity, and the people who depend on it. We demand that governments take concrete actions to: Strengthen institutions and environmental norms, Immediately suspend rhetoric that encourages deforestation and the destruction of the Amazon, Stop the indiscriminate expansion of the agricultural, livestock and extractive frontier in the area, Adopt proper land use and planning, Ensure the existence and restoration of ecosystem life cycles, and Control deforestation and conserve the Amazon with the financial and technical support of multilateral international cooperation. Learn more about our work in the Amazon. PRESS CONTACT: Victor Quintanilla (México), [email protected], +5215570522107
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