The Almonacid de la Cuba Dam is a Roman gravity dam on the Aguasvivas River in Almonacid de la Cuba, Zaragoza province, Aragon, Spain, dating to the 1st century AD.

Immediately thereafter it was reconstructed as a gravity dam, incorporating portions of the earlier structure.

It underwent repairs under Claudius and under Trajan, at which time it was heightened, probably to offset the effects of silting.

[3] In 2020 a system of walkways and footbridges was constructed to allow visitors a close-up view of the dam and its surroundings.

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