Crestuma-Lever Dam

Crestuma-Lever Dam

Upstream face of the dam and retained lake
Location of Crestuma-Lever Dam in Portugal
Official name Barragem de Crestuma-Lever
Country Portugal
Location municipality Vila Nova de Gaia, Porto District
Coordinates 41°4′21.9″N 8°29′10.8″W / 41.072750°N 8.486333°W / 41.072750; -8.486333Coordinates: 41°4′21.9″N 8°29′10.8″W / 41.072750°N 8.486333°W / 41.072750; -8.486333
Purpose Power
Status Operational
Construction began 1976
Opening date 1985
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) 25.5 m (84 ft)
Length 470 m (1,540 ft)
Elevation at crest 25.5 m (84 ft)
Width (crest) 8.2 m (27 ft)
Dam volume 205,000 m3 (7,200,000 cu ft)
Spillway type Dam body
Spillway capacity 26,000 m3/s (920,000 cu ft/s)
Reservoir
Total capacity 110,000,000 m3 (89,000 acre·ft)
Active capacity 22,500,000 m3 (18,200 acre·ft)
Surface area 12.98 km2 (5.01 sq mi)
Normal elevation 13 m (43 ft)
Power station
Operator(s) Energias de Portugal
Commission date 1985
Hydraulic head 12.6 m (41 ft) (max)
Turbines 3 x 39 MW Kaplan-type
Installed capacity 117 MW
Annual generation 360 GWh

Crestuma-Lever Dam (Portuguese: Barragem de Crestuma-Lever) is a concrete gravity dam on the Douro. It is located in the municipality Vila Nova de Gaia, in Porto District, Portugal.

Construction of the dam began in 1976. The dam was completed in 1985. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE).[1]

Dam

Crestuma-Lever Dam is a 25.5[2][3][4] m tall (height above foundation) and 470 m long gravity dam with a crest altitude of 25.5 m. The volume of the dam is 205,000 m³. The spillway with 8 gates is part of the dam body (maximum discharge 26,000 m³/s).[1]

Reservoir

At full reservoir level of 13 m (maximum flood level of 21.5 m) the reservoir of the dam has a surface area of 12.98 km² and a total capacity of 110 mio. m³.[1] The active capacity is 22.5[1][2] (16[4] or 19[5]) mio. m³.

Power plant

The run-of-the-river hydroelectric power plant was commissioned in 1985[2][5][6] (1986).[3][4] It is operated by EDP. The plant has a nameplate capacity of 117[2][3] (105[4][5] or 108[1][6]) MW. Its average annual generation is 360[2] (311,[3] 363,[5] 366.9,[1][6] or 399[4]) GWh.

The power station contains 3 Kaplan turbine-generators (horizontal axis) with 39 (36[6]) MW (36.1 MVA) each in a dam powerhouse located on the left side of the dam. The turbine rotation is 83.3 rpm. The minimum hydraulic head is 6.8 m, the maximum 12.6 m. Maximum flow per turbine is 450 m³/s.[2]

The turbines and generators were provided by Sorefame.[6]

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.[7]

See also

References

  1. 1 2 3 4 5 6 "CRESTUMA - LEVER DAM". APA Barragens de Portugal. Retrieved 2015-03-11.
  2. 1 2 3 4 5 6 "Crestuma-Lever Informação Técnica" (in Portuguese). Energias de Portugal. Retrieved 2015-03-11.
  3. 1 2 3 4 "DECLARAÇÃO AMBIENTAL 2012" (PDF) (in Portuguese). Energias de Portugal. pp. 36–37 (34–35). Retrieved 2015-03-11.
  4. 1 2 3 4 5 "Central de Crestuma - Lever" (in Portuguese). www.wikienergia.pt. Retrieved 2015-03-11.
  5. 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.
  6. 1 2 3 4 5 "Crestuma-Lever Hydroelectric Power Plant Portugal". Global Energy Observatory. Retrieved 2015-03-11.
  7. ↑ "waterway introduction". Instituto Portuário e dos Transportes Marítimos. Retrieved 2015-02-11.
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