Touvedo Dam

Touvedo Dam (Portuguese: Barragem de Touvedo) is a concrete gravity dam on the Limia. It is located in the municipality Ponte da Barca e Arcos de Valdevez, in Viana do Castelo District, Portugal.

Touvedo Dam
Touvedo Dam is located in Portugal
Touvedo Dam
Location of Touvedo Dam in Portugal
Official nameBarragem de Touvedo
CountryPortugal
Locationmunicipality Ponte da Barca e Arcos de Valdevez,Viana do Castelo District
Coordinates41°48′44.9″N 8°21′13.5″W
PurposePower, irrigation, flood control
StatusOperational
Construction began1987
Opening date1993
Owner(s)Companhia Portuguesa de Produção de Electricidade
Operator(s)Energias de Portugal
Dam and spillways
Type of damConcrete gravity dam
ImpoundsLimia
Height (foundation)42.5 m (139 ft)
Length133.5 m (438 ft)
Elevation at crest55 m (180 ft)
Dam volume74,620 m3 (2,635,000 cu ft)
Spillway typeOver the dam
Spillway capacity3,200 m3/s (110,000 cu ft/s)
Reservoir
Total capacity15,500,000 m3 (12,600 acre⋅ft)
Active capacity4,500,000 m3 (3,600 acre⋅ft)
Surface area1.72 km2 (0.66 sq mi)
Normal elevation50 m (160 ft)
Operator(s)Energias de Portugal
Commission date1993
Hydraulic head25 m (82 ft) (max)
Turbines1 x 22.2 MW Kaplan-type
Installed capacity22 MW
Annual generation66.8 GWh

Construction of the dam began in 1987. The dam was completed in 1993. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE). The dam is used for power generation, irrigation and flood control.[1]

Dam

Touvedo Dam is a 42.5 m tall (height above foundation) and 133.5 m long gravity dam with a crest altitude of 55 m. The volume of the dam is 74,620 m³. The spillway with 3 cradial gates is part of the dam body (maximum discharge 3,200 m³/s). There is also a bottom outlet which can discharge up to 50 m³/s.[1]

Reservoir

At full reservoir level of 50 m the reservoir of the dam has a surface area of 1.72 km² and a total capacity of 15.5 mio. m³. The active capacity is 4.5 (4.0)[2] mio. m³. Minimum operating level is 47.5 m.[1]

The reservoir of Touvedo Dam serves as lower reservoir for the Alto Lindoso pumped-storage power plant.[3][4]

Power plant

The hydroelectric power plant was commissioned in 1993.[5] It is operated by EDP. The plant has a nameplate capacity of 22[1][2][3][4][5] MW. Its average annual generation is 66.8[5] (61,[2] 67,[1][4] or 78[3]) GWh.

The power station contains one Kaplan turbine-generator with 22.2 MW (24 MVA) in a dam powerhouse located on the left side of the dam. The turbine rotation is 187.5 rpm. The minimum hydraulic head is 20 m, the maximum 25 m. Maximum flow per turbine is 100 m³/s.[5]

The turbine and generator were provided by GEC-Alstom.[4]

See also

References

  1. "TOUVEDO DAM". APA Barragens de Portugal. Retrieved 2015-03-13.
  2. "Hidroelectricidade em Portugal memória e desafio" (PDF) (in Portuguese). Rede Eléctrica Nacional, S.A. p. 30 (28). Archived from the original (PDF) on 2021-06-27. Retrieved 2015-03-13.
  3. "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 17–18 (15–16). Archived from the original (PDF) on 2014-11-03. Retrieved 2015-03-13.
  4. "Touvedo Hydroelectric Power Plant Portugal". Global Energy Observatory. Retrieved 2015-02-13.
  5. "Touvedo Informação Técnica" (in Portuguese). Energias de Portugal. Archived from the original on 2014-11-11. Retrieved 2015-03-13.
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