Roman Dam of Pego da Moura

The Roman Dam of Pego da Moura is a small buttress dam situated in the municipality of Grândola in the Setúbal District of Portugal [1]. The dam was constructed during the middle of the Roman occupation of Portugal [1]. Built in two phases, it consists of a rectilinear wall that was originally about 40 metres long [1]. The ruins have a maximum height of 3 m. and a thickness of 2.90 m [1]. There are six downstream buttresses that are 2.50 m. apart, which are around 2.70 m. thick and 2.90 m long [1]. The dam was almost entirely constructed using opus incertum [1]. The dam was first noted by Father Carvalho Costa in 1712 in his work, Corographia Portugueza [1]. However, it was not until the 1990s that a brief archaeological study was conducted [1].