Cohilla, La reservoir

Cantabria · Cantabria

Cantábrico Occidental basin Reservoirs in CantabriaHydroelectric

Province: Cantabria
Basin: Cantábrico Occidental
River: Nansa
Dam: Arch · 1950

25.0%

Current level

3 hm³

Stored water

12 hm³

Total capacity

0.0 hm³

Weekly change

+1.0 hm³

Vs. 2025

+0.3 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Cohilla, La reservoir (embalse de Cohilla, La), in the Cantábrico Occidental basin and linked to Tudanca, Cantabria and Cantabria, is at 25.0% of its capacity, holding 3 hm³ against a maximum capacity of 12 hm³. It is currently steady in the latest update.

Compared with 2025: above (+8.3 points). Compared with the recent historical mean: above (+2.5 points).

Its main uses include water supply and hydroelectric power.

References
Reference	Level	Difference
Previous week	25.0%	0.0 pts
Same week 2025	16.7%	+8.3 pts
10-year mean	22.5%	+2.5 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Tudanca
River: Nansa
Dam type: Arch
Year built: 1950
Surface area: 450 ha
Upstream: — no data
Downstream: No

Recorded uses

Water supply
Electricity
Fishing

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

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET