Itaipu Dam built on the River Parana is one of the largest dams in the world. Which of the following two countries have this as a joint project?

Itaipu Dam is a major hydroelectric project built on the Paraná River as a binational, jointly managed enterprise of Brazil and Paraguay. The Treaty of Itaipu (1973) and the Act of Iguaçu established Itaipu Binacional to build, operate, and share costs and benefits between the two countries, making the facility co-owned by Brazil and Paraguay [1]. The dam spans the international border near Foz do Iguaçu (Brazil) and Ciudad del Este/Hernandarias (Paraguay); construction began in the 1970s and the plant began producing power in the 1980s, eventually reaching roughly 14,000 MW installed capacity, underscoring its significance as a shared Brazil–Paraguay endeavour [2].

Sources

1. [1] https://www.gihub.org/connectivity-across-borders/case-studies/itaipu-hydroelectric-dam/
2. [2] https://ethw.org/Milestones:Itaipu_Hydroelectric_Power_Plant,_1975-1984