| Albina | Ullibarri | Urrunaga | Añarbe | |
| Height of the dam(m) | 25,3 | 36,0 | 31,0 | 65,5 |
| Reservoir surface area (Ha) | 50,0 | 1.863,3 | 972,4 | 201,0 |
| Capacity (Hm3) | 5,7 | 146,5 | 71,9 | 43,7 |
| Water release rate (m3/sec) | 50,0 | 570,0 | 400,0 | 593,0 |
| Average reservoired volume | : | 98,0 | 45,0 | 32,8 |
| Total year | ||||
| January | : | 91,4 | 41,9 | 34,3 |
| February | : | 110,0 | 43,7 | 36,2 |
| March | : | 108,1 | 43,2 | 34,1 |
| April | : | 101,1 | 48,6 | 32,1 |
| May | : | 108,1 | 43,2 | 33,3 |
| June | : | 101,1 | 48,6 | 35,2 |
| July | : | 105,2 | 52,0 | 34,4 |
| August | : | 109,5 | 53,4 | 32,2 |
| September | : | 91,7 | 45,4 | 30,0 |
| October | : | 83,8 | 41,2 | 28,0 |
| November | : | 78,0 | 39,1 | 29,4 |
| December | : | 88,1 | 39,5 | 34,9 |
(:) No data available
Date June 17, 2011
Source: Vitoria Municipal Water board AMVISA / Water Consortium for Greater Bilbao / Inter-community Waters of the Añarbe
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