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| Usina Hidrelétrica de Tucuruí | |
|---|---|
| Name | Usina Hidrelétrica de Tucuruí |
| Location | Tucuruí, Pará, Brazil |
| Status | Operational |
| Construction started | 1975 |
| Opened | 1984 |
| Owner | Eletrobrás Eletronorte |
| Dam type | Concrete gravity, earth-fill |
| River | Tocantins River |
| Reservoir | Tucuruí Reservoir |
| Plant capacity | 8,370 MW (expanded) |
| Turbines | Francis units |
Usina Hidrelétrica de Tucuruí is a large hydroelectric complex on the Tocantins River near Tucuruí in Pará, Brazil. Conceived during the Brazilian military regime era and implemented by Eletrobrás Eletronorte and contractors including Construtora Norberto Odebrecht and Técnicas Reunidas, the project reshaped regional Amazonas-adjacent infrastructure and energy networks. The plant became a pivotal node for power supply to Belém, Manaus, Brasília, and industrial corridors linked to Vale and the Brazilian steel industry.
The initiative traces to planning by IPEA, DNOS precursors, and technical studies commissioned by Ministério de Minas e Energia and ELETRONORTE during the 1970s. Early milestones involved surveying by teams from Universidade de São Paulo, Universidade Federal do Pará, and consulting firms linked to BNDES financing. Political drivers included national integration programs promoted by Ministério da Integração Nacional and the Programa de Integração Nacional (PIN), aligning with corridors like the Belém–Brasília Highway expansion and the expansion of the Trans-Amazonian Highway corridor. Completion phases in the 1980s and later expansions in the 1990s and 2000s corresponded with initiatives under presidents from Ernesto Geisel-era planners to executives in administrations of Fernando Henrique Cardoso and Luiz Inácio Lula da Silva.
Design contracts engaged multinational consortia including Siemens, Alstom, and Brazilian firms such as Construtora Norberto Odebrecht and Camargo Corrêa. Engineering studies drew on precedents from Itaipu Dam and Balbina Dam projects, with hydraulic modeling by teams affiliated with Universidade Federal de Minas Gerais and Coppe/UFRJ. Construction phases included diversion works, cofferdam erection, and earth-fill emplacement coordinated with logistics via the Port of Belém, the Tocantins-Araguaia navigation corridor, and rail links to Carajás Mine infrastructure managed by Estrada de Ferro Carajás. Contracts were financed by BNDES, export credit agencies such as Eximbank-type mechanisms, and corporate equity from Eletrobrás.
The complex comprises a main concrete spillway, an earth-fill embankment, and a large reservoir inundating adjacent floodplain areas mapped by INPE remote sensing. Powerhouse equipment uses multiple Francis turbines supplied by Alstom and Siemens. Design parameters reference hydraulic head and flow metrics comparable to projects evaluated by ICOLD standards. The reservoir and dam geometry relate to geomorphological studies by Embrapa and hydrological analyses by ANA. Electrical interconnection uses high-voltage transmission meters linked to the Sistema Interligado Nacional substations managed by ONS.
Initial installed capacity was scaled in staged units, with subsequent expansions raising capacity through rehabilitation programs overseen by Eletrobrás Eletronorte and contractors including GE Renewable Energy refurbishments and control systems by ABB. Output feeds regional load centers such as Belém and supports mining operations at Carajás Mine and industrial complexes in Manaus. Operational coordination involves ONS dispatching, regulatory oversight by ANEEL, and commercial contracts governed under frameworks used by Operador Nacional do Sistema Elétrico and CCEE mechanisms.
Environmental and social impact assessments prepared for licensing involved IBAMA and studies by FUNAI regarding indigenous groups such as communities monitored in research by Museu Paraense Emílio Goeldi. Flooding of the reservoir affected riverine ecosystems studied by Instituto Mamirauá and fisheries researchers at Universidade Federal do Pará. Resettlement programs were implemented under guidelines linked to Ministério do Desenvolvimento Agrário norms and monitored by NGOs including Sociedade Paraense de Defesa dos Direitos Humanos and international organizations such as World Bank-linked environmental advisors. Impacts cited include alterations to Tocantins River hydrology, greenhouse gas fluxes evaluated in studies by IPCC-referenced methodologies, and biodiversity concerns documented by Conservation International and WWF affiliates.
Associated works include navigation locks, highways, transmission corridors, and urban projects funded through partnerships with Banco do Brasil and state agencies like Governo do Estado do Pará. Logistics nodes comprise the Port of Tucuruí, airfields connecting to Val-de-Cans International Airport, and access roads integrated with the Belém–Brasília Highway. Regional development projects reference agricultural settlement schemes promoted by INCRA and hydro-agrarian initiatives coordinated with Embrapa research stations.
Legal and political disputes involved litigation in Brazilian courts including cases brought before Supremo Tribunal Federal and administrative reviews at Ibama and ANEEL; stakeholders ranged from indigenous organizations represented with assistance from FUNAI to environmental NGOs such as Greenpeace Brazil and Amigos da Terra Brasil. Contested issues included compensation, resettlement adequacy litigated under precedents involving Constitution of Brazil protections, and compliance with environmental licensing procedures influenced by rulings tied to National Environmental Policy Act-style statutes. International scrutiny came from multilaterals and academic critiques published in journals affiliated with University of Oxford, Harvard University, and University of Cambridge research centers.
Category:Hydroelectric power stations in Brazil Category:Buildings and structures in Pará Category:Dams on the Tocantins River