Mequinenza Dam

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Mequinenza Dam
Presa de Mequinensa.jpg
Mequinenza Dam is located in Spain
Mequinenza Dam
Location of Mequinenza Dam in Spain
Official name Presa de Mequinenza
Location Province of Zaragoza, Spain
Coordinates Lua error in package.lua at line 80: module 'strict' not found.
Purpose Power
Status Operational
Construction began 1957
Opening date 1964
Owner(s) Endesa
Operator(s) Endesa
Dam and spillways
Type of dam Concrete gravity dam
Impounds Ebro
Height (foundation) 79 m (259 ft)
Length 461 m (1,512 ft)
Elevation at crest 124 m (407 ft)
Dam volume 1,100,000 m3 (39,000,000 cu ft)
Spillway type Over the dam
Spillway capacity 11,000 m3/s (8.9 acre·ft/s)
Reservoir
Total capacity 1,530,000,000 m3 (1,240,000 acre·ft)
Surface area 75.4 km2 (29.1 sq mi)
Max. length 110 km (68 mi)
Max. width 600 m (2,000 ft)
Max. water depth 62 m (203 ft)
Normal elevation 121 m (397 ft)
Power station
Commission date 1966
Turbines 4 x 96 MW Francis-type
Installed capacity 384 MW

Mequinenza Dam (Spanish: Presa de Mequinenza) is a concrete gravity dam in the province of Zaragoza, Spain. It impounds the Ebro creating a large reservoir, which is called Mar de Aragón.[1] About 35 km downstream of Mequinenza dam is Ribarroja dam.

Empresa Nacional Hidroeléctrica del Ribagorzana S.A. (ENHER) was mandated in 1955[2][3] by Instituto Nacional de Industria (INI) to build two dams on the Ebro near Mequinenza and Ribarroja. Work on Mequinenza dam started in 1957.[1] The filling of the reservoir began in December 1965.[2] The power plant was operational in 1964[3][4] (1966[5]). ENHER was acquired by Endesa in 1999.[6]

Dam

Mequinenza Dam is a 79 m tall (height above foundation) and 461 m long gravity dam with a crest altitude of 124 m. The volume of the dam is 1,100,000 m³. The dam features a spillway with 6 gates over the dam (maximum discharge 11,000 m³/s) and one bottom outlet (maximum discharge 160 m³/s).[7]

Reservoir

At full reservoir level of 121 m.a.s.l. the reservoir has a surface area of 75.4 km², a total capacity of 1.53 billion m³ and a length of almost 110[2][3] km. The average width of the reservoir is about 600 m, its maximum (average) depth is 62 (20) m.[5]

Power plant

The power plant contains 4 Francis turbine-generators. The initial nameplate capacity was 81 MW each. The turbines, generators and transformers were refurbished from 2007 until 2010 raising the capacity of the new machines to 96 MW each.[4] Maximum flow is 150 m³/s per turbine.[5]

See also

External links

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References

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