Régua Dam

Régua Dam
Location of Régua Dam in Portugal
Official name Barragem da Régua
Country Portugal
Location municipality Peso da Régua, Vila Real District
Coordinates 41°8′46″N 7°44′24″W / 41.14611°N 7.74000°W / 41.14611; -7.74000Coordinates: 41°8′46″N 7°44′24″W / 41.14611°N 7.74000°W / 41.14611; -7.74000
Purpose Power
Status Operational
Construction began 1965
Opening date 1973
Owner(s) Companhia Portuguesa de Produção de Electricidade
Operator(s) Energias de Portugal
Dam and spillways
Type of dam Concrete gravity dam
Impounds Douro
Height (foundation) 41 m (135 ft)
Length 350 m (1,150 ft)
Elevation at crest 81 m (266 ft)
Width (crest) 6 m (20 ft)
Dam volume 108,000 m3 (3,800,000 cu ft)
Spillway type Dam body
Spillway capacity 21,500 m3/s (760,000 cu ft/s)
Reservoir
Total capacity 97,000,000 m3 (79,000 acre·ft)
Active capacity 8,000,000 m3 (6,500 acre·ft)
Surface area 8.5 km2 (3.3 sq mi)
Normal elevation 73.5 m (241 ft)
Power station
Operator(s) Energias de Portugal
Commission date 1973
Hydraulic head 27.5 m (90 ft) (max)
Turbines 3 x 58.84 MW Kaplan-type
Installed capacity 180 MW
Annual generation 581.1 GWh
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Régua Dam (Portuguese: Barragem da Régua) is a concrete gravity dam on the Douro, where the river forms the border line between the districts of Vila Real and Viseu. It is located in the municipality Peso da Régua, in Vila Real District, Portugal.

Construction of the dam began in 1965. The dam was completed in 1973. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE).[1]

Dam

Régua Dam is a 41 m tall (height above foundation) and 350 m long gravity dam with a crest altitude of 81 m. The volume of the dam is 108,000 m³. The spillway with 5 radial gates is part of the dam body (maximum discharge 21,500 m³/s). There is also a bottom outlet.[1]

Reservoir

At full reservoir level of 73.5 m the reservoir of the dam has a surface area of 8.5 km² and a total capacity of 95 mio. m³.[1] The active capacity is 12[2][3] (13[4]) mio. m³.

Power plant

The run-of-the-river hydroelectric power plant was commissioned in 1973.[2][3][4][5] It is operated by EDP. The plant has a nameplate capacity of 180[2][3] (156)[1][4][5] MW. Its average annual generation is 581.1[2] (620.8,[3] 682[4] or 738[1][5]) GWh.

The power station contains 3 Kaplan turbine-generators with 58.84 (52[5] or 60[3]) MW (58 MVA) each in a dam powerhouse located on the right side of the dam. The turbine rotation is 107.1 rpm. The minimum hydraulic head is 20 m, the maximum 27.5 m. Maximum flow per turbine is 316 m³/s.[2]

The turbines were provided by Kværner, the generators by Brown, Boveri & Cie.[5]

Lock

On the left side of the dam is a lock, which can handle ships with the following maximum properties: 83 m in length, 11.40 m on the beam, 3.8 m load-draught and a cargo capacity of 2500 tons.[6]

See also

References

  1. 1 2 3 4 5 "RÉGUA DAM". APA Barragens de Portugal. Retrieved 2015-03-09.
  2. 1 2 3 4 5 "Régua Informação Técnica" (in Portuguese). Energias de Portugal. Retrieved 2015-03-09.
  3. 1 2 3 4 5 "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 32–33 (30–31). Retrieved 2015-03-09.
  4. 1 2 3 4 "Hidroelectricidade em Portugal memória e desafio" (PDF) (in Portuguese). Rede Eléctrica Nacional, S.A. p. 29 (27). Retrieved 2015-03-09.
  5. 1 2 3 4 5 "Regua Hydroelectric Power Plant Portugal". Global Energy Observatory. Retrieved 2015-03-09.
  6. "waterway introduction". Instituto Portuário e dos Transportes Marítimos. Retrieved 2015-02-11.
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