The Trasona Reservoir (Spanish: Embalse de Trasona) is a reservoir in Asturias, Spain across the Alvares River. It is located in the parish of Trasona, in the municipality of Corvera de Asturias.The reservoir is property of Arcelor. Its construction was finished in 1957, with the aim of supply water to the steel plant located in Avilés and to the population of the zone.