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| Usina Hidrelétrica de Balbina | |
|---|---|
| Name | Usina Hidrelétrica de Balbina |
| Location | Amazonas, Brasil |
| Status | Operational |
| Construction begin | 1985 |
| Opened | 1989 |
| Owner | Centrais Elétricas do Norte do Brasil (ELETRONORTE) |
| Reservoir | Lago de Balbina |
| Capacity mw | 250 |
| Turbines | 5 × 50 MW |
Usina Hidrelétrica de Balbina is a hydroelectric facility located in the state of Amazonas, Brazil, on the Uatumã River near the municipalities of Presidente Figueiredo and Manaus. The plant, built and operated by Centrais Elétricas do Norte do Brasil (ELETRONORTE), became operational in 1989 and is noted for its large reservoir relative to installed capacity and for generating controversy involving environmentalists, academics, and international organizations. Debates over Balbina engage figures and institutions such as WWF, Greenpeace, Conservation International, IBAMA, FUNAI, Ministério do Meio Ambiente (Brasil), and academic groups at Universidade de São Paulo, Federal University of Amazonas, and international universities.
The project originated in the late 1970s within planning processes linked to Empresa de Pesquisa Energética, Empresa de Energia, and energy policy debates during presidencies including João Figueiredo, José Sarney, and later Fernando Collor de Mello. Feasibility studies involved consultants from multinational firms and technical agencies like ANEEL, Eletrobras, and the Banco Nacional de Desenvolvimento Econômico e Social (BNDES), with financing and political discussion tied to regional development programs associated with agencies such as Superintendência da Zona Franca de Manaus and cross-sector ministries including Ministério da Integração Nacional. Environmental licensing processes engaged Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA) and Brazilian courts including tribunals in Brasília and Manaus.
Design and construction were executed by consortia of Brazilian and international contractors under contracts negotiated by ELETRONORTE and overseen by engineering consultants from firms linked historically to projects like Itaipu, Sobradinho, and Balbina. Civil works included dam construction, spillways, intake structures, and powerhouse installation with turbines supplied by major manufacturers with histories in projects such as Itaipu Binacional and Tucuruí. Contractors coordinated logistics via ports on the Amazon River and transport routes to Manaus, with labor and supervision involving entities such as Serviço Geológico do Brasil and workforce represented by unions with links to Confederação Nacional dos Trabalhadores Metalúrgicos and regional governments of Amazonas (state).
The facility has an installed capacity of approximately 250 MW, typically achieved with five 50 MW units, and an associated reservoir, Lago de Balbina, whose flooded area is comparable to wetlands and river systems in the Amazon Basin. The dam and powerhouse employ hydraulic engineering principles similar to those used at Tucuruí Dam and Itaipu Dam, with electrical systems interfacing with the regional grid managed by ONS and transmission assets connected to substations serving Manaus. Technical studies referenced instrumentation standards from ABNT and hydraulic modeling techniques used in projects reviewed by COPPE at Universidade Federal do Rio de Janeiro and hydroacoustic assessments in research published in journals associated with Sociedade Brasileira para o Progresso da Ciência.
Operational management is the responsibility of ELETRONORTE, which coordinates maintenance programs, turbine overhauls, and environmental monitoring with agencies such as ANEEL and regional offices of IBAMA. Maintenance regimes follow protocols akin to those applied at major Brazilian plants like Curuá-Una and employ condition monitoring technologies promoted by research centers such as Centro de Pesquisas de Energia Elétrica (CEPEL). Grid dispatch follows rules set by Operador Nacional do Sistema Elétrico (ONS), and outage planning interacts with sector authorities including Ministério de Minas e Energia and state utilities historically active in Amazon projects.
Balbina's reservoir flooded extensive tropical forest and peatland areas, prompting studies by institutions such as Universidade de São Paulo, National Institute for Space Research (INPE), Smithsonian Institution, Conservation International, and WWF that documented greenhouse gas emissions, biodiversity loss, and habitat fragmentation. Empirical work compared Balbina with other Amazonian dams like Tucuruí and natural floodplain dynamics of rivers such as the Rio Negro and Solimões River. Environmental assessments referenced legal frameworks under Lei de Crimes Ambientais and involved consultation processes with FUNAI regarding indigenous territories proximate to the reservoir and protected areas like Parque Nacional do Jaú and Reserva Biológica do Uatumã.
Resettlement and socioeconomic outcomes invoked actors including municipal governments of Presidente Figueiredo and Manaus, federal agencies like Ministério do Desenvolvimento Regional, and social organizations such as Movimento dos Atingidos por Barragens (MAB). Studies by researchers at Universidade Federal do Amazonas and NGOs like Greenpeace and Amnesty International documented impacts on riverine communities, fisherfolk, and extractivist livelihoods tied to fish species monitored by institutions such as Instituto Nacional de Pesquisas da Amazônia (INPA). Compensation programs and land titling involved courts and public prosecutors linked to Procuradoria Geral da República and municipal land registries.
Criticism of the project has come from environmental NGOs WWF, Greenpeace, and Conservation International, academics from Universidade de São Paulo, Federal University of Rio de Janeiro, and Oxford University, and international commentators in media outlets such as The New York Times and The Guardian. Debates center on cost-benefit analyses conducted by think tanks like IPEA and academic groups at COPPE and CEPEL, legal challenges in Brazilian courts, and policy reviews by BNDES and ANEEL. Controversies also relate to climate research from institutions such as Max Planck Institute for Biogeochemistry and University of Stirling comparing greenhouse gas emissions from Balbina's reservoir with fossil-fuel alternatives, prompting broader discussions in forums including United Nations Framework Convention on Climate Change (UNFCCC) and regional policy bodies like Amazon Cooperation Treaty Organization.
Category:Hydroelectric power stations in Brazil Category:Dams in Amazonas (Brazilian state) Category:Energy infrastructure completed in 1989