Bemposta Dam

Bemposta Dam is a concrete arch dam on the Douro, where the river forms the national border line between Spain and Portugal. It is located in the municipality Mogadouro, in Bragança District, Portugal.Construction of the dam began in 1957. The dam was completed in 1964. It is owned by Companhia Portuguesa de Produção de Electricidade .DamBemposta Dam is an 87m and 297m arch dam with a crest altitude of 408 m. The volume of the dam is 316,000 m³. The dam contains four crest spillways and one bottom outlet .ReservoirAt full reservoir level of 402 metres the reservoir of the dam has a surface area of 4.05 km² and its total capacity is 129 mio. m³ .Power plantThe power plant is a run-of-the-river hydroelectric power station. It is owned by CPPE, but operated by EDP.Bemposta IBemposta I has a nameplate capacity of 240 (210)MW. Its average annual generation is 924.1 (918, 1,034 or 1,086) GWh.The power station contains three Francis turbine-generators with 79.5 (70) MW each in an underground powerhouse. The turbine rotation is 150 rpm. The minimum hydraulic head is 59 m, the maximum 71 m. Maximum flow per turbine is 152 m³/s.