Castro reservoir

Zamora · Castilla y León

Duero basin Reservoirs in Castilla y LeónHydroelectric

Province: Zamora
Basin: Duero
River: Algodor
Dam: Gravity · 1974

96.3%

Current level

26 hm³

Stored water

27 hm³

Total capacity

+1.0 hm³

Weekly change

+3.0 hm³

Vs. 2025

+2.3 hm³

Vs. 10-year mean

Historical trend

Stored water volume · hm³

hm³

Weekly summary

The Castro reservoir (embalse de Castro), in the Duero basin and linked to Villamuelas, Zamora and Castilla y León, is at 96.3% of its capacity, holding 26 hm³ against a maximum capacity of 27 hm³. It is currently rising, by 1.0 hm³ this week.

Compared with 2025: above (+11.1 points). Compared with the recent historical mean: above (+8.5 points).

Its main uses include water supply and hydroelectric power.

References
Reference	Level	Difference
Previous week	92.6%	+3.7 pts
Same week 2025	85.2%	+11.1 pts
10-year mean	87.8%	+8.5 pts

Technical data

Characteristics of the dam and its recorded uses.

Characteristics

Municipality: Villamuelas
River: Algodor
Dam type: Gravity
Year built: 1974
Surface area: 98 ha
Upstream: Finisterre
Downstream: Castrejón

Recorded uses

Water supply
Electricity
Fishing

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

Source: MITECO Inventory of Dams and Reservoirs.

Data: MITECO · AEMET