| Mequinenza Dam | |
|---|---|
 | |
  Location of Mequinenza Dam in Spain | |
| Official name | Presa de Mequinenza |
| Location | Province of Zaragoza, Spain |
| Coordinates | 41°22′08″N 0°16′24″E / 41.368983°N 0.273381°E |
| 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) |
| Maximum length | 110 km (68 mi) |
| Maximum width | 600 m (2,000 ft) |
| Maximum water depth | 62 m (203 ft) |
| Normal elevation | 121 m (397 ft) |
| 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]
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