Aguieira Dam

Aguieira Dam (Portuguese: Barragem da Aguieira) also known as Foz do Dão Dam (Portuguese: Barragem da Foz do Dão) is a concrete multiple arch dam on the Mondego River, where the river forms the border line between the districts of Coimbra and Viseu. It is located in the municipality Penacova, in Coimbra District, Portugal.

Aguieira Dam
Location of Aguieira Dam in Portugal
Official name	Barragem da Aguieira
Location	municipality Mortagua, Viseu District, Portugal
Coordinates	40°20′24.7″N 8°11′49.2″W
Status	Operational
Construction began	1972
Opening date	1981
Owner(s)	Companhia Portuguesa de Produção de Electricidade
Dam and spillways
Type of dam	Concrete multiple arch dam
Impounds	Mondego River
Height (foundation)	89 m (292 ft)
Length	400 m (1,300 ft)
Elevation at crest	125 m (410 ft)
Dam volume	365,000 m^3 (12,900,000 cu ft)
Spillway type	On the dam body
Spillway capacity	2,080 m³
Reservoir
Total capacity	423,000,000 m^3 (343,000 acre⋅ft)
Active capacity	304,000,000 m^3 (246,000 acre⋅ft)
Surface area	20 km^2 (7.7 sq mi)
Normal elevation	117 m (384 ft)
Operator(s)	Energias de Portugal
Commission date	1981
Type	Pumped-storage
Hydraulic head	71.6 m (235 ft) (max)
Turbines	3 x 90 MW Francis-type
Installed capacity	336 MW
Annual generation	209.9 GWh

Construction of the dam began in 1972. The dam was completed in 1981. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE). Besides power production the dam is also used for flood control, water supply and irrigation.[1]

Dam

Aguieira Dam is an 89 m tall (height above foundation) and 400 m long multiple arch dam with a crest altitude of 125 m. The volume of the dam is 365,000 m³. The dam contains 2 crest spillways (maximum discharge 2,080 m³/s) and one bottom outlet (maximum discharge 180 m³/s).[1]

Reservoir

At full reservoir level of 117 m (maximum flood level of 126 m) the reservoir of the dam has a surface area of 20 km² and its total capacity is 423 mio. m³. Its active capacity is 304 (216[2] or 253[3]) mio. m³. Minimum operating level is 100 m.[1] With the 216 mio. m³ water 39.2 GWh can be produced.[2] The reservoir submerged the villages of Breda (in the municipality of Mortágua) and Foz do Dão (in the municipality of Santa Comba Dão).

Power plant

The power plant went operational in 1981. It is a pumped-storage hydroelectric power station. It is owned by CPPE, but operated by EDP and Iberdrola.[4][5] The plant has a nameplate capacity of 336[2][4] (270)[1][3] MW. Its average annual generation is 209.9[2] (193,[6] 209.6[1][4] or 256[3]) GWh.

The power station contains 3 Francis turbine-generators with 112.4 MW each in a surface powerhouse at the toe of the dam. The turbine rotation is 125 rpm. The minimum hydraulic head is 53.4 m, the maximum 71.6 m. Maximum flow per turbine is 180 m³/s. When pumping, the turbine has a maximum energy consumption of 91 MW and can pump 156 m³/s.[2]

As lower reservoir for Aguieira the reservoir of Raiva dam is used.[6]

See also

• List of power stations in Portugal
• List of dams and reservoirs in Portugal

References

1. "AGUIEIRA DAM". APA Barragens de Portugal. Retrieved 2015-02-07.
2. "Miranda Informação Técnica" (in Portuguese). Energias de Portugal. Archived from the original on 2014-11-03. Retrieved 2015-02-05.
3. "Hidroelectricidade em Portugal memória e desafio" (PDF) (in Portuguese). Rede Eléctrica Nacional, S.A. p. 29 (27). Retrieved 2015-02-05.
4. "Aguieira Hydroelectric Power Plant Brazil". Global Energy Observatory. Retrieved 2015-02-07.
5. "EDP awards management of 336-MW Aguieira, 24-MW Raiva to Iberdrola". www.hydroworld.com. Retrieved 2015-02-07.
6. "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 43–45 (41–43). Archived from the original (PDF) on 2014-11-03. Retrieved 2015-02-07.