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| Reventazón Hydroelectric Plant | |
|---|---|
| Name | Reventazón Hydroelectric Plant |
| Location | Costa Rica, Limón Province |
| Status | Operational |
| Construction | 2009–2016 |
| Owner | Instituto Costarricense de Electricidad |
| Plant capacity | 305 MW |
| Plant type | Hydroelectric, Reservoir |
| Dam type | Concrete-faced rockfill |
| Plant commission | 2016 |
Reventazón Hydroelectric Plant
The Reventazón Hydroelectric Plant is a large hydroelectric complex on the Reventazón River in eastern Costa Rica, located near the Pococí Canton and the Siquirres Canton in Limón Province. It is operated by the Instituto Costarricense de Electricidad and was developed to increase national electricity capacity, complementing other Costa Rican facilities such as the Cachí Hydroelectric Plant and the Pococí Dam. The project connects to the national grid at substations near Siquirres and integrates into regional energy planning involving institutions like the Ministry of Environment and Energy (Costa Rica) and multinational financiers.
The complex comprises the Reventazón Dam, an associated reservoir often called the Reventazón Reservoir, and an underground power station with a rated installed capacity of approximately 305 MW, making it among the largest hydroelectric projects in Central America. The scheme was conceived to provide baseload and peaking power, supporting urban centers including San José, Cartago, and Limón, while linking to transmission corridors operated by the Compañía Nacional de Fuerza y Luz and overseen by regulatory bodies like the Superintendencia de Electricidad y Telecomunicaciones (SUTEL).
Project initiation followed feasibility studies by international consultants and engineering firms after earlier hydraulic works on the Reventazón basin, such as the Balsa and Cachí developments. Planning involved environmental impact assessments reviewed by the Ministry of Environment and Energy (Costa Rica) and engagement with local municipalities including Pococí and Siquirres. Funding packages combined loans and guarantees from multilateral lenders including the World Bank, the Inter-American Development Bank, the KfW Development Bank, and bilateral partners like the Government of Japan and the Government of Spain. Contracts were awarded to consortia featuring global construction and turbine suppliers with experience on projects such as Itaipu and Three Gorges Dam.
The Reventazón Dam is a large concrete-faced rockfill dam (CFRD) designed for water storage and regulation of the Reventazón River, with a spillway capable of handling extreme flood events modeled after regional hydrometeorological records from Instituto Meteorológico Nacional (Costa Rica). The reservoir provides active storage for seasonal regulation and irrigation support for agricultural districts including Guácimo and Pococí. The underground power station houses Francis-type turbines supplied by international manufacturers with design philosophies informed by projects at Guri, Yacyretá, and La Venta. The plant’s hydraulic head, intake structures, penstocks, surge tanks, and tailrace were engineered to meet seismic criteria established in codes influenced by standards from American Society of Civil Engineers and regional seismic studies related to the Cocos Plate subduction zone.
Construction began in the late 2000s with earthmoving, diversion works, and cofferdam erection managed by construction firms experienced in large dams, working under oversight from the International Commission on Large Dams. Contractors coordinated logistics through ports on the Caribbean Sea and road networks connecting to San José. The schedule included staged impoundment, mechanical installation of turbines and generators, and testing phases monitored by engineers from the Instituto Costarricense de Electricidad and independent technical advisors. Commissioning occurred in 2016 after progressive synchronization of generating units with the national grid and compliance checks by agencies such as the Ministry of Public Works and Transport (Costa Rica).
Since commissioning, the plant has contributed significantly to Costa Rica’s renewable energy matrix, operating alongside geothermal fields at Turrialba and Miravalles, wind farms in Guanacaste, and biomass plants. Performance metrics indicate annual generation in the range modeled during feasibility studies, with operational regimes balancing flood control, irrigation releases, and power dispatch coordinated through grid operators and the Sistema Nacional de Control de Energía. Maintenance programs include turbine inspections, sediment management, and structural monitoring, informed by best practices used at facilities like Almendra Dam and Itaipu Binacional.
Environmental assessments addressed impacts on biodiversity in the Reventazón basin, including riparian habitats, aquatic species, and migratory corridors linked to protected areas such as the La Selva Biological Station and Braulio Carrillo National Park. Mitigation measures incorporated reforestation, fish passage studies, and community development programs coordinated with local governments and NGOs like Fundación Corcovado and international conservation partners. Social programs sought to support resettlement, livelihood restoration, and cultural heritage preservation for communities in Pococí and Siquirres, with monitoring by agencies including the Ministry of Health (Costa Rica) and the National Registry.
Ownership rests primarily with the Instituto Costarricense de Electricidad, with financing agreements involving the World Bank, IDB, KfW, and private contractors under turnkey contracts. The project’s economics were evaluated against alternative investments in thermal and renewable energy technologies, with tariffs, repayment schedules, and public sector budgeting overseen by the Ministry of Finance (Costa Rica) and audited by the Comptroller General of the Republic. Revenues contribute to national energy security and support Costa Rica’s commitments under international agreements such as the Paris Agreement and regional energy integration initiatives with neighboring states.
Category:Hydroelectric power stations in Costa Rica