Baron of Mauá International Bridge  The Baron of Mauá International Bridge (, ) is a bridge that crosses the Jaguarão River, linking the cities of Jaguarão, Rio Grande do Sul, Brazil and Río Branco, Uruguay. Built between 1927 and 1930, it was named in honor of Irineu Evangelista de Souza, Baron and Viscount of Mauá, an important businessman and banker who developed activities in both countries during the 19th century.