Pocinho Dam

Pocinho Dam (Portuguese: Barragem do Pocinho) is a concrete gravity dam on the Douro, where the river forms the border line between the districts of Guarda and Bragança. It is located in the municipality Vila Nova de Foz Côa, in Guarda District, Portugal.

Pocinho Dam
Location of Pocinho Dam in Portugal
Official nameBarragem do Pocinho
CountryPortugal
Locationmunicipality Vila Nova de Foz Côa, Guarda District
Coordinates41°8′3.5″N 7°6′50.8″W
PurposePower
StatusOperational
Construction began1974
Opening date1982
Owner(s)Companhia Portuguesa de Produção de Electricidade
Operator(s)Energias de Portugal
Dam and spillways
Type of damConcrete gravity dam
ImpoundsDouro
Height (foundation)49 m (161 ft)
Length430 m (1,410 ft)
Elevation at crest139 m (456 ft)
Width (crest)6.4 m (21 ft)
Dam volume120,000 m3 (4,200,000 cu ft)
Spillway typeDam body
Spillway capacity15,000 m3/s (530,000 cu ft/s)
Reservoir
Total capacity83,070,000 m3 (67,350 acre⋅ft)
Active capacity12,240,000 m3 (9,920 acre⋅ft)
Surface area8.29 km2 (3.20 sq mi)
Normal elevation125.5 m (412 ft)
Operator(s)Energias de Portugal
Commission date1983
Hydraulic head21.6 m (71 ft) (max)
Turbines3 x 57.6 MW Kaplan-type
Installed capacity186 MW
Annual generation408.4 GWh

Construction of the dam began in 1974. The dam was completed in 1982. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE).[1]

Dam

Pocinho Dam is a 49 m tall (height above foundation) and 430 m long gravity dam with a crest altitude of 139 m. The volume of the dam is 120,000 m³. The spillway with 4 radial gates is part of the dam body (maximum discharge 15,000 m³/s).[1]

Reservoir

At full reservoir level of 125.5 m (maximum flood level of 134.5 m) the reservoir of the dam has a surface area of 8.29 km² and a total capacity of 83.07 mio. m³. The active capacity is 12.24 (12)[2][3] mio. m³.[1]

Power plant

The run-of-the-river hydroelectric power plant was commissioned in 1983[2][3] (1982).[4] It is operated by EDP. The plant has a nameplate capacity of 186[1][2][3][4][5] MW. Its average annual generation is 408.4[2] (406.2,[5] 530[3] or 534[1][4]) GWh.

The power station contains 3 Kaplan turbine-generators with 57.6 MW (62 MVA) each in a dam powerhouse located on the left side of the dam. The turbine rotation is 88.2 rpm. The minimum hydraulic head is 15.5 m, the maximum 21.6 m. Maximum flow per turbine is 390 m³/s.[2]

The turbines were provided by Kværner, the generators by ABB Group.[4]

Lock

On the right 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]

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See also

References
  1. "POCINHO DAM". APA Barragens de Portugal. Retrieved 2015-03-02.
  2. "Pocinho Informação Técnica" (in Portuguese). Energias de Portugal. Archived from the original on 2017-08-11. Retrieved 2015-03-02.
  3. "Hidroelectricidade em Portugal memória e desafio" (PDF) (in Portuguese). Rede Eléctrica Nacional, S.A. p. 29 (27). Retrieved 2015-03-02.
  4. "Pocinho Hydroelectric Power Plant Portugal". Global Energy Observatory. Retrieved 2015-03-02.
  5. "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 40 (38). Archived from the original (PDF) on 2014-11-03. Retrieved 2015-03-02.
  6. "waterway introduction". Instituto Portuário e dos Transportes Marítimos. Retrieved 2015-02-11.
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