Mansilla reservoir

La Rioja · La Rioja

Ebro basin Reservoirs in La Rioja

Province: La Rioja
Basin: Ebro
River: Najerilla
Dam: Gravity · 1960

27.9%

Current level

19 hm³

Stored water

68 hm³

Total capacity

-1.0 hm³

Weekly change

-5.0 hm³

Vs. 2025

-4.5 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Mansilla reservoir (embalse de Mansilla), in the Ebro basin and linked to Mansilla de la Sierra, Villavelayo, La Rioja and La Rioja, is at 27.9% of its capacity, holding 19 hm³ against a maximum capacity of 68 hm³. It is currently falling, by 1.0 hm³ this week.

Compared with 2025: below (-7.3 points). Compared with the recent historical mean: below (-6.6 points).

Its main uses include water supply, irrigation and hydroelectric power.

References
Reference	Level	Difference
Previous week	29.4%	-1.5 pts
Same week 2025	35.3%	-7.3 pts
10-year mean	34.6%	-6.6 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Mansilla de la Sierra, Villavelayo
River: Najerilla
Dam type: Gravity
Year built: 1960
Surface area: 234.5 ha
Upstream: — no data
Downstream: Mequinenza

Recorded uses

Water supply
Irrigation
Electricity
Fishing
Boating
Swimming

Not recorded: industrial, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET