Belver Dam (Portuguese: Barragem de Belver) is a concrete gravity dam on the Tagus, where the river forms the border line between the Portuguese districts of Portalegre and Santarém.

It is located in the municipality Gavião, in Portalegre District.

The spillway is part of the dam body (10 roller gates with a maximum discharge capacity of 18,000 m³/s).

[1] At full reservoir level of 46.15 metres (151.4 ft) (maximum flood level of 47.15 metres (154.7 ft)) the reservoir of the dam has a surface area of 2.86 km² and its total capacity is 12.5 mio.

The power station contains six Kaplan turbine-generators in a dam powerhouse.