Fratel Dam

Fratel Dam is a hydroelectric power station located on the Tagus River in the Portalegre district. The structure spans across the river valley with multiple turbines housed within to convert water flow into electricity.

The facility was completed in 1973 and contributed to the development of Portugal's energy infrastructure. It was part of a series of hydroelectric projects on the Tagus that provided the nation with renewable power.

The creation of the dam reservoir in the Tagus Valley altered the landscape and submerged numerous ancient petroglyphs, affecting the regional archaeological heritage.

The site can be viewed from roads near the river, though public access is limited to certain viewing areas. It is best visited during dry weather when the surrounding paths and roads are most accessible.

The dam maintains water levels between 71 and 76 meters, managing a reservoir capacity of 92.5 million cubic meters through six radial spillway gates.

Location: Portalegre

Elevation above the sea: 74 m

Length: 240 m

GPS coordinates: 39.54333,-7.80278

Latest update: December 12, 2025 07:50