Transnational projects on the Uruguay River have a long history.
In 1994 completed or under construction hydroelectric projects in the region included the Ilha Solteira Dam, Jupiá Dam, Três Irmãos Dam, Porto Primavera Dam, Itaipu Dam and Yacyretá Dam on the Paraná River and the Roncador/Panambí Dam, Garabí Dam, São Pedro Dam and Salto Grande Dam on the Uruguay River.