Ullíbarri-Gamboa Reservoir
| Ullíbarri-Gamboa Reservoir | |
|---|---|
View of the reservoir | |
| Country | Spain |
| Location | Álava, Basque Country |
| Coordinates | 42°56′N 2°37′W / 42.93°N 2.62°W |
| Opening date | 31 December 1957 |
| Dam and spillways | |
| Height | 37 m (121 ft) |
| Length | 543 m (1,781 ft) |
| Elevation at crest | 548 m (1,798 ft) |
| Spillway volumetric flow rate | 6,800 m3/s (240,000 cu ft/s) |
| Reservoir | |
| Total capacity | 147.2 hm3 (119,300 acre⋅ft) |
| Catchment area | 274 km2 (106 sq mi) |
| Surface area | 16.95 km2 (6.54 sq mi) |
| Normal elevation | 546.5 m (1,793 ft) |
| Official name | Colas del Embalse de Ullibarri |
| Designated | 24 October 2002 |
| Reference no. | 1255 |
| Area | 397 ha (980 acres) |
Natura 2000 site (SAC) | |
| Designated | June 2015 |
| Part of | Zadorraren sistemako urtegiak / Embalses del sistema del Zadorra |
| Reference no. | ES2110011 |
.png){kind=link}
The Ullíbarri-Gamboa Reservoir (Basque: Uribarri Ganboako urtegia, Spanish: Embalse de Ullíbarri-Gamboa) is located in Álava, Basque Country, Spain. With a total capacity of 147.2 hm3 (5.20×109 cu ft), it is the largest reservoir in the Basque Country. Together with the nearby Urrunaga Reservoir, it provides water to the nearby city of Vitoria-Gasteiz and to Bilbao and its metropolitan area. The whole reservoir has been designated as a Natura 2000 site, and the southeastern end of the reservoir is also protected as a Ramsar wetland. It is also a popular leisure area, particularly for hiking and bathing.