Disappearance of the municipality of Tragó de Noguera Historical milestone · Os de Balaguer, Noguera, Lleida Image of Os de Balaguer, not of the place itself. The Santa Anna reservoir, on the Noguera Ribagorçana, flooded the village of Tragó, which in 1960 still had 496 inhabitants. The municipality was dissolved on 16 July 1964 and its district passed for the most part to Os de Balaguer. 1964 Photo: Viquipèdia (CC BY-SA 3.0) What to see and do in Os de Balaguer