Cabril Dam


Cabril Dam is a concrete double curvature arch dam on the Zêzere River, where the river forms the border line between the districts of Castelo Branco and Leiria. It is located in the municipality Sertã, in Castelo Branco District, Portugal.
Construction of the dam began in 1950. The dam was completed in 1954. It is owned by Companhia Portuguesa de Produção de Electricidade.

Dam

Cabril Dam is a 132 m tall and 290 m long double curvature arch dam with a crest altitude of 297 m. The volume of the dam is 360,000 m³. The dam features on both banks one shaft spillway and one bottom outlet.

The Dam's arch is crossed by Estrada Nacional 2, Portugal's longest road

Reservoir

At full reservoir level of 294 m the reservoir of the dam has a surface area of 20.23 km² and a total capacity of 720 mio. m³. Minimum operating level is 240 m. With the 615 mio. m³ water 339.3 GWh can be produced.

Power plant

The hydroelectric power plant went operational in 1954. It is owned by CPPE, but operated by EDP. The plant has a nameplate capacity of 108 MW. Its average annual generation is 304.8 GWh.
The power station contains 2 Francis turbine-generators with 47 MW each in a surface powerhouse at the toe of the dam. The turbine rotation is 214.3 rpm. The minimum hydraulic head is 84.6 m, the maximum 121.5 m. Maximum flow per turbine is 54 m³/s.