Corpus Christi Dam Floated at US$5 Billion for Paraná River
Paraguay · ENERGY
Key Facts
- —What happened A Comisión Mixta del Río Paraná representative floated the Corpus Christi dam at US$5 billion on Central Radio 1140 AM, reported on 12 June 2026.
- —How big Up to 3,500 MW on the Paraná river at the Pindo-í site, with a permanent flood area of 13,838 hectares across both countries.
- —The catch The project is at prefeasibility only, with no current environmental impact assessment, and Misiones law requires a binding plebiscite.
- —Who pays No cost split between Argentina and Paraguay has been announced, and no construction timeline exists.
- —What comes next Proposals to call a new plebiscite surfaced between August and November 2025; a 1996 vote rejected the dam with 88.63% against.
A US$5 billion estimate revives a decades-old binational project that still lacks studies, financing and voter approval.
A projected binational dam between Argentina and Paraguay has been floated at US$5 billion, according to Enrique Guardo, representative of the Comisión Mixta del Río Paraná. In remarks aired on Central Radio 1140 AM and reported on 12 June 2026, Guardo said the Corpus Christi dam would deliver output comparable to Yacyretá with a much smaller land footprint, while improving navigation in Alto Paraná. The project, however, remains at prefeasibility stage and faces a binding plebiscite requirement in the Argentine province of Misiones.
US$5 Billion Figure Floated for Corpus Christi Dam
The US$5 billion estimate was voiced by Enrique Guardo, representative of the Comisión Mixta del Río Paraná, the binational body that deals with river matters between Argentina and Paraguay. His remarks aired on Central Radio 1140 AM and were reported on 12 June 2026.
Guardo claimed the Corpus Christi dam could generate electricity comparable to Yacyretá, the giant binational plant downstream, while flooding a much smaller area of land. He also framed the project as a way to improve navigation along the Paraná river in the Alto Paraná stretch.
The figure is a floated estimate, not an approved budget. Neither the Argentine nor the Paraguayan government has announced a cost split or a construction timeline for the project.
Even so, the remarks revived a decades-old debate over one of the largest hydroelectric projects ever studied on the Paraná river.
Design at the Pindo-í Site
The dam would be built on the Paraná river at the Pindo-í site, in the municipality of Corpus, in Argentina’s Misiones province. It would be a binational undertaking shared by Argentina and Paraguay.
Projected capacity reaches up to 3,500 megawatts. A 2020 prefeasibility study put the range between 2,880 and 3,456 megawatts, depending on the final design.
The permanent flood area would cover 13,838 hectares. Of that total, 6,709 hectares lie on the Argentine side and 7,129 hectares on the Paraguayan side.
Guardo’s argument rests on that footprint: output comparable to Yacyretá, he said, with far less land permanently under water.
The prefeasibility figures describe a project of regional scale. Even the low end of the 2020 range, 2,880 megawatts, would rank among the larger hydroelectric additions studied in the region in recent decades.
Prefeasibility Only, With No Current Environmental Study
The project remains at prefeasibility stage. The available studies date from before 2000 and from a 2020 update, and there is no current environmental impact assessment.
No construction contract, financing package or binational agreement has been announced. Every public figure so far, including the US$5 billion tag, describes a projected work rather than an approved one.
The Corpus Christi dam is also not a project of the Entidad Binacional Yacyretá, known as EBY. The binational entity is advancing the separate Aña Cuá expansion of the Yacyretá complex, a 270-megawatt, US$450 million undertaking.
That distinction matters because the two projects are sometimes conflated in public debate. Aña Cuá is moving ahead under its own structure, while Corpus Christi exists only in study documents.
A 1996 Plebiscite Rejected the Project
Misiones voters have already pronounced themselves on the dam once. In a 1996 provincial plebiscite, 88.63% voted against building it.
Provincial law now requires a new binding plebiscite before the project can advance. That legal hurdle makes public consultation a central step, not a formality.
Proposals to call a new plebiscite surfaced between August and November 2025, as discussion of the project returned to the provincial agenda.
Until such a vote takes place and approves the dam, the prefeasibility studies cannot turn into an executable project.
The plebiscite requirement is not the only open question, but it is the decisive one. Without voter approval in Misiones, no binational agreement or financing package can proceed on its own.
What Would Have to Happen Next
For the Corpus Christi dam to move forward, Argentina and Paraguay would have to agree on a cost split, commission a current environmental impact assessment and set a timeline. None of those steps has been announced.
In Misiones, the binding plebiscite stands between the studies and any construction decision. The 1996 result, with nearly nine out of ten voters against, remains the political benchmark.
Paraguay’s interest centers on energy output and on navigation gains in Alto Paraná, a stretch of the Paraná river that matters for regional trade.
For now, the project is a floated idea with a price tag, a prefeasibility file and a legal obstacle course ahead of it.
Frequently Asked Questions
What is the Corpus Christi dam?
It is a projected binational hydroelectric dam between Argentina and Paraguay on the Paraná river, at the Pindo-í site in Corpus, Misiones. It targets up to 3,500 megawatts and remains at prefeasibility stage.
Has the Corpus Christi dam been approved?
No. There is no current environmental impact assessment, no announced cost split and no timeline. Misiones law also requires a new binding plebiscite; a 1996 vote rejected the dam with 88.63% against.
Is the dam part of Yacyretá?
No. The Entidad Binacional Yacyretá is advancing the separate Aña Cuá expansion, a 270-megawatt project priced at US$450 million. Corpus Christi is a distinct, earlier-stage proposal.
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