Roman Dam of Belas, Ancient Roman dam near Belas, Portugal
The Roman dam of Belas stands 8 meters tall with three large buttresses and extends across 15.5 meters along the Carenque stream.
Built in the 3rd century AD, this dam supplied water to the Roman aqueduct system that transported water over 10 kilometers to ancient Olisipo, now Lisbon.
The dam's construction demonstrates Roman engineering techniques, featuring pseudo-isodomic stonework with uniformly sized stones arranged in regular courses.
Visitors can find the dam's remains between National Road 250 and the wooded area, though vegetation partially restricts the view of the structure.
The dam's reservoir could hold approximately 120,000 cubic meters of water, built using opus incertum technique with brown lime mortar and fine sand.
Location: Mina de Água
Operator: Companhia das Águas de Lisboa (administração)
GPS coordinates: 38.79323,-9.24444
Latest update: March 11, 2025 12:41
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