Tanes reservoir

Asturias · Asturias / Asturies

Cantábrico Occidental basin Reservoirs in Asturias / Asturies

Province: Asturias
Basin: Cantábrico Occidental
River: Nalón
Dam: Gravity · 1978

64.7%

Current level

22 hm³

Stored water

34 hm³

Total capacity

0.0 hm³

Weekly change

+1.0 hm³

Vs. 2025

-2.2 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Tanes reservoir (embalse de Tanes), in the Cantábrico Occidental basin and linked to Caso, Sobrescobio, Asturias and Asturias / Asturies, is at 64.7% of its capacity, holding 22 hm³ against a maximum capacity of 34 hm³. It is currently steady in the latest update.

Compared with 2025: above (+2.9 points). Compared with the recent historical mean: below (-5.6 points).

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

References
Reference	Level	Difference
Previous week	64.7%	0.0 pts
Same week 2025	61.8%	+2.9 pts
10-year mean	70.4%	-5.6 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Caso, Sobrescobio
River: Nalón
Dam type: Gravity
Year built: 1978
Surface area: 63 ha
Upstream: — no data
Downstream: Rioseco

Recorded uses

Water supply
Irrigation
Electricity
Fishing

Not recorded: industrial, boating, swimming, picnic, restaurants.

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET