Vilar Dam
Vilar Dam (Portuguese: Barragem de Vilar, also known as Barragem de Vilar-Tabuaço) is an embankment dam on the Távora, a left (southern) tributary of the Douro. It is located in the municipality Tabuaço, in Viseu District, Portugal.
| Great Vilar Dam | |
|---|---|
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  Location of Great Vilar Dam in Portugal | |
| Official name | Barragem de Vilar |
| Country | Portugal |
| Location | municipality Tabuaço, Viseu District |
| Coordinates | 40°59′12.5″N 7°32′7.9″W |
| Purpose | Power |
| Status | Operational |
| Construction began | 1958 |
| Opening date | 1965 |
| Owner(s) | Companhia Portuguesa de Produção de Electricidade |
| Operator(s) | Energias de Portugal |
| Dam and spillways | |
| Type of dam | Rockfill embankment dam |
| Impounds | Távora |
| Height (foundation) | 58 m (190 ft) |
| Height (thalweg) | 55 m (180 ft) |
| Length | 240 m (790 ft) |
| Elevation at crest | 555 m (1,821 ft) |
| Width (crest) | 5.2 m (17 ft) |
| Dam volume | 300,000 m3 (11,000,000 cu ft) |
| Spillway type | Chute spillway |
| Spillway capacity | 500 m3/s (18,000 cu ft/s) |
| Reservoir | |
| Total capacity | 99,750,000 m3 (80,870 acre⋅ft) |
| Active capacity | 95,270,000 m3 (77,240 acre⋅ft) |
| Surface area | 6.7 km2 (2.6 sq mi) |
| Normal elevation | 552 m (1,811 ft) |
| Operator(s) | Energias de Portugal |
| Commission date | 1965 |
| Hydraulic head | 461 m (1,512 ft) (max) |
| Turbines | 2 x 32.65 MW Pelton-type |
| Installed capacity | 58 MW |
| Annual generation | 137.6 GWh |
Construction of the dam began in 1958 and was completed in 1965. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE) and is used for power generation.[1]
Dam
Vilar Dam is a 58 m tall (height above foundation) and 240 m long rockfill embankment dam with a crest altitude of 555 m. The upstream facing of the dam is made of concrete. The volume of the dam is 300,000 m³. The chute spillway with 2 radial gates is located at the right side of the dam. The maximum discharge is 500 m³/s. There is also a bottom outlet.[1]
Reservoir
At full reservoir level of 552 m the reservoir of the dam has a surface area of 6.7km² and a total capacity of 99.75 mio. m³. The active capacity is 95.27 (95.3[2] or 96[3]) mio. m³.[1] With the 95.3 mio. m³ of water 115.6 GWh can be produced.[2]
Power plant
The hydroelectric power plant was commissioned in 1965.[2][3][4][5] It is operated by EDP. The plant has a nameplate capacity of 58[2][4] (64)[1][3][5] MW. Its average annual generation is 137.6[2] (123[4] or 148[1][3][5]) GWh.
The power station contains 2 Pelton turbine-generators (vertical shaft) with 32.65 MW (40 MVA) in an underground powerhouse 350[5] m below the surface, located 15.6[4] km from the dam. The turbine rotation is 500 rpm. The minimum hydraulic head is 432.5 m, and the maximum 461 m. Maximum flow per turbine is 9 m³/s.[2]
References
- "VILAR DAM". APA Barragens de Portugal. Retrieved 2015-03-24.
- "Vilar Informação Técnica" (in Portuguese). Energias de Portugal. Archived from the original on 2017-08-13. Retrieved 2015-03-24.
- "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 2015-03-16.
- "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 30–31 (28–29). Archived from the original (PDF) on 2014-11-03. Retrieved 2015-03-24.
- "Vilar-Tabuaco Hydroelectric Power Plant Portugal". Global Energy Observatory. Retrieved 2015-03-24.